diff options
Diffstat (limited to 'board/integratorap/integratorap.c')
| -rw-r--r-- | board/integratorap/integratorap.c | 192 |
1 files changed, 182 insertions, 10 deletions
diff --git a/board/integratorap/integratorap.c b/board/integratorap/integratorap.c index fb83c82c15..d4f61d6403 100644 --- a/board/integratorap/integratorap.c +++ b/board/integratorap/integratorap.c @@ -24,7 +24,7 @@ * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License @@ -36,7 +36,7 @@ #include <common.h> #ifdef CONFIG_PCI -# include <pci.h> +#include <pci.h> #endif void flash__init (void); @@ -46,7 +46,7 @@ void peripheral_power_enable (void); #if defined(CONFIG_SHOW_BOOT_PROGRESS) void show_boot_progress(int progress) { - printf("Boot reached stage %d\n", progress); + printf("Boot reached stage %d\n", progress); } #endif @@ -75,6 +75,11 @@ int board_init (void) gd->flags = 0; +#ifdef CONFIG_CM_REMAP +extern void cm_remap(void); + cm_remap(); /* remaps writeable memory to 0x00000000 */ +#endif + icache_enable (); flash__init (); @@ -109,17 +114,17 @@ static struct pci_config_table pci_integrator_config_table[] = { /* V3 access routines */ #define _V3Write16(o,v) (*(volatile unsigned short *)(PCI_V3_BASE + (unsigned int)(o)) = (unsigned short)(v)) -#define _V3Read16(o) (*(volatile unsigned short *)(PCI_V3_BASE + (unsigned int)(o))) +#define _V3Read16(o) (*(volatile unsigned short *)(PCI_V3_BASE + (unsigned int)(o))) #define _V3Write32(o,v) (*(volatile unsigned int *)(PCI_V3_BASE + (unsigned int)(o)) = (unsigned int)(v)) -#define _V3Read32(o) (*(volatile unsigned int *)(PCI_V3_BASE + (unsigned int)(o))) +#define _V3Read32(o) (*(volatile unsigned int *)(PCI_V3_BASE + (unsigned int)(o))) /* Compute address necessary to access PCI config space for the given */ /* bus and device. */ #define PCI_CONFIG_ADDRESS( __bus, __devfn, __offset ) ({ \ unsigned int __address, __devicebit; \ unsigned short __mapaddress; \ - unsigned int __dev = PCI_DEV (__devfn); /* FIXME to check!! (slot?) */ \ + unsigned int __dev = PCI_DEV (__devfn); /* FIXME to check!! (slot?) */ \ \ if (__bus == 0) { \ /* local bus segment so need a type 0 config cycle */ \ @@ -142,10 +147,10 @@ static struct pci_config_table pci_integrator_config_table[] = { /* A31-A24 are don't care (so clear to 0) */ \ __mapaddress = 0x000B; /* 101=>config cycle, 1=>A1&A0 from PCI_CFG */ \ __address = PCI_CONFIG_BASE; \ - __address |= ((__bus & 0xFF) << 16); /* bits 23..16 = bus number */ \ - __address |= ((__dev & 0x1F) << 11); /* bits 15..11 = device number */ \ + __address |= ((__bus & 0xFF) << 16); /* bits 23..16 = bus number */ \ + __address |= ((__dev & 0x1F) << 11); /* bits 15..11 = device number */ \ __address |= ((__devfn & 0x07) << 8); /* bits 10..8 = function number */ \ - __address |= __offset & 0xFF; /* bits 7..0 = register number */ \ + __address |= __offset & 0xFF; /* bits 7..0 = register number */ \ } \ _V3Write16 (V3_LB_MAP1, __mapaddress); \ __address; \ @@ -463,7 +468,7 @@ void flash__init (void) /************************************************************* Routine:ether__init Description: take the Ethernet controller out of reset and wait - for the EEPROM load to complete. + for the EEPROM load to complete. *************************************************************/ void ether__init (void) { @@ -475,5 +480,172 @@ void ether__init (void) ******************************/ int dram_init (void) { + DECLARE_GLOBAL_DATA_PTR; + + gd->bd->bi_dram[0].start = PHYS_SDRAM_1; + gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE; + +#ifdef CONFIG_CM_SPD_DETECT + { +extern void dram_query(void); + unsigned long cm_reg_sdram; + unsigned long sdram_shift; + + dram_query(); /* Assembler accesses to CM registers */ + /* Queries the SPD values */ + + /* Obtain the SDRAM size from the CM SDRAM register */ + + cm_reg_sdram = *(volatile ulong *)(CM_BASE + OS_SDRAM); + /* Register SDRAM size + * + * 0xXXXXXXbbb000bb 16 MB + * 0xXXXXXXbbb001bb 32 MB + * 0xXXXXXXbbb010bb 64 MB + * 0xXXXXXXbbb011bb 128 MB + * 0xXXXXXXbbb100bb 256 MB + * + */ + sdram_shift = ((cm_reg_sdram & 0x0000001C)/4)%4; + gd->bd->bi_dram[0].size = 0x01000000 << sdram_shift; + + } +#endif /* CM_SPD_DETECT */ + return 0; } + +/* The Integrator/AP timer1 is clocked at 24MHz + * can be divided by 16 or 256 + * and is a 16-bit counter + */ +/* U-Boot expects a 32 bit timer running at CFG_HZ*/ +static ulong timestamp; /* U-Boot ticks since startup */ +static ulong total_count = 0; /* Total timer count */ +static ulong lastdec; /* Timer reading at last call */ +static ulong div_clock = 256; /* Divisor applied to the timer clock */ +static ulong div_timer = 1; /* Divisor to convert timer reading + * change to U-Boot ticks + */ +/* CFG_HZ = CFG_HZ_CLOCK/(div_clock * div_timer) */ + +#define TIMER_LOAD_VAL 0x0000FFFFL +#define READ_TIMER ((*(volatile ulong *)(CFG_TIMERBASE+4)) & 0x0000FFFFL) + +/* all function return values in U-Boot ticks i.e. (1/CFG_HZ) sec + * - unless otherwise stated + */ + +/* starts a counter + * - the Integrator/AP timer issues an interrupt + * each time it reaches zero + */ +int interrupt_init (void) +{ + /* Load timer with initial value */ + *(volatile ulong *)(CFG_TIMERBASE + 0) = TIMER_LOAD_VAL; + /* Set timer to be + * enabled 1 + * free-running 0 + * XX 00 + * divider 256 10 + * XX 00 + */ + *(volatile ulong *)(CFG_TIMERBASE + 8) = 0x00000088; + total_count = 0; + /* init the timestamp and lastdec value */ + reset_timer_masked(); + + div_timer = CFG_HZ_CLOCK / CFG_HZ; + div_timer /= div_clock; + + return (0); +} + +/* + * timer without interrupts + */ +void reset_timer (void) +{ + reset_timer_masked (); +} + +ulong get_timer (ulong base_ticks) +{ + return get_timer_masked () - base_ticks; +} + +void set_timer (ulong ticks) +{ + timestamp = ticks; + total_count = ticks * div_timer; + reset_timer_masked(); +} + +/* delay x useconds */ +void udelay (unsigned long usec) +{ + ulong tmo, tmp; + + /* Convert to U-Boot ticks */ + tmo = usec * CFG_HZ; + tmo /= (1000000L); + + tmp = get_timer_masked(); /* get current timestamp */ + tmo += tmp; /* wake up timestamp */ + + while (get_timer_masked () < tmo) { /* loop till event */ + /*NOP*/; + } +} + +void reset_timer_masked (void) +{ + /* reset time */ + lastdec = READ_TIMER; /* capture current decrementer value */ + timestamp = 0; /* start "advancing" time stamp from 0 */ +} + +/* converts the timer reading to U-Boot ticks */ +/* the timestamp is the number of ticks since reset */ +/* This routine does not detect wraps unless called regularly + ASSUMES a call at least every 16 seconds to detect every reload */ +ulong get_timer_masked (void) +{ + ulong now = READ_TIMER; /* current count */ + + if (now > lastdec) { + /* Must have wrapped */ + total_count += lastdec + TIMER_LOAD_VAL + 1 - now; + } else { + total_count += lastdec - now; + } + lastdec = now; + timestamp = total_count/div_timer; + + return timestamp; +} + +/* waits specified delay value and resets timestamp */ +void udelay_masked (unsigned long usec) +{ + udelay(usec); +} + +/* + * This function is derived from PowerPC code (read timebase as long long). + * On ARM it just returns the timer value. + */ +unsigned long long get_ticks(void) +{ + return get_timer(0); +} + +/* + * Return the timebase clock frequency + * i.e. how often the timer decrements + */ +ulong get_tbclk (void) +{ + return CFG_HZ_CLOCK/div_clock; +} |
