Annotation of funnyos/arch/sam7s64/config.c, Revision 1.13
1.1 init 1: /*
1.13 ! nbrk 2: * $Id: config.c,v 1.12 2007/11/24 17:45:19 nbrk Exp $
1.1 init 3: */
4: #include <sys/types.h>
5: #include <sys/device.h>
6:
1.9 nbrk 7: #include <dev/cpuvar.h>
8: #include <arch/sam7s64/dev/at91sam7.h>
1.4 nbrk 9:
1.1 init 10: /*
11: * Configuration file for platform (AT91SAM7S64).
12: */
13:
14: /* device drivers */
15: extern struct driver root_dr;
16: extern struct driver cpu_dr;
1.3 init 17: extern struct driver saapbus_dr;
1.7 nbrk 18: extern struct driver sapio_dr;
1.8 nbrk 19: extern struct driver gpioled_dr;
1.13 ! nbrk 20: extern struct driver saaic_dr;
! 21: extern struct driver sartt_dr;
1.1 init 22:
23:
1.9 nbrk 24: extern void (*putchar)(char);
1.10 nbrk 25: extern void sausart_early_putchar(char ch);
1.1 init 26:
27: /* amount of physical memory, in Bytes */
1.5 nbrk 28: uint32_t physmem = 16384 /* 16KB :) */;
1.1 init 29:
30: /*
31: * Where to attach each device.
32: */
33: struct attachinfo config_attachinfo[] = {
34: /* child, parent, pminor, loc, intrno, flags */
35: { "cpu" , "root", 0, 0, 0, 0 },
1.3 init 36: { "saapbus","root", 0, 0, 0, 0 },
1.7 nbrk 37: { "sapio", "saapbus", 0, 0, 0, 0 },
1.8 nbrk 38: { "gpioled","sapio", 0, 17, 0, 0 },
39: { "gpioled","sapio", 0, 18, 0, 0 },
1.13 ! nbrk 40: { "sartt", "saapbus", 0, 0, 1, 0 },
! 41: { "saaic", "saapbus", 0, 0, 0, 0 },
1.1 init 42: { NULL, NULL, 0, 0, 0, 0 }
43: };
44:
45:
46: /*
47: * Link device names with their drivers.
48: */
49: struct driverinfo config_driverinfo[] = {
50: /* name, driverp, ninstances (should be -1) */
51: { "root", &root_dr, -1 },
52: { "cpu" , &cpu_dr, -1 },
1.3 init 53: { "saapbus" , &saapbus_dr, -1 },
1.7 nbrk 54: { "sapio", &sapio_dr, -1 },
1.8 nbrk 55: { "gpioled", &gpioled_dr, -1 },
1.13 ! nbrk 56: { "saaic", &saaic_dr, -1 },
! 57: { "sartt", &sartt_dr, -1 },
1.1 init 58: { NULL, NULL, 0 }
59: };
60:
61:
62: /*
63: * Machine early-stage initialization hooks.
64: */
65:
66: void
1.4 nbrk 67: config_machineinit(void)
1.1 init 68: {
69: /*
1.4 nbrk 70: * Initialize critical devices at startup.
1.1 init 71: */
1.9 nbrk 72: __cpu_disable_irq();
1.4 nbrk 73:
1.5 nbrk 74: /* disable watchdog */
1.9 nbrk 75: *AT91C_WDTC_WDMR = AT91C_WDTC_WDDIS;
1.5 nbrk 76:
1.9 nbrk 77: /* set FLASH to high-speed */
78: *AT91C_MC_FMR = AT91C_MC_FWS_0FWS;
1.5 nbrk 79:
1.11 nbrk 80: /* enable user RESET (magic button on board) */
81: *AT91C_RSTC_RMR = AT91C_RSTC_URSTEN | AT91C_RSTC_KEY;
82:
1.5 nbrk 83: /*
1.9 nbrk 84: * Initialize oscillators.
85: * Taken from Atmel's examples.
1.6 nbrk 86: */
1.9 nbrk 87: /* Set MCK at 48 054 850 */
1.6 nbrk 88:
1.9 nbrk 89: /* 1 Enabling the Main Oscillator */
90: /* SCK = 1/32768 = 30.51 uSecond
91: * Start up time = 8 * 6 / SCK = 56 * 30.51 = 1,46484375 ms
1.5 nbrk 92: */
1.9 nbrk 93: *AT91C_PMC_MOR = ( (AT91C_CKGR_OSCOUNT & (0x06 <<8)) | AT91C_CKGR_MOSCEN);
1.5 nbrk 94:
1.9 nbrk 95: /* Wait the startup time */
96: while(!(*AT91C_PMC_SR & AT91C_PMC_MOSCS))
97: ;
1.5 nbrk 98:
1.9 nbrk 99: /* 2 Checking the Main Oscillator Frequency (Optional) */
100: /* TODO */
1.5 nbrk 101:
1.9 nbrk 102: /* 3 Setting PLL and divider: */
103: /* - div by 14 Fin = 1.3165 =(18,432 / 14)
104: * - Mul 72+1: Fout = 96.1097 =(3,6864 *73)
105: * for 96 MHz the erroe is 0.11%
106: * Field out NOT USED = 0
107: * PLLCOUNT pll startup time estimate at : 0.844 ms
108: * PLLCOUNT 28 = 0.000844 /(1/32768)
109: */
110: *AT91C_PMC_PLLR = ( (AT91C_CKGR_DIV & 14 ) |
111: (AT91C_CKGR_PLLCOUNT & (28<<8)) |
112: (AT91C_CKGR_MUL & (72<<16)) );
1.5 nbrk 113:
1.9 nbrk 114: /* Wait the startup time */
115: while(!(*AT91C_PMC_SR & AT91C_PMC_LOCK))
116: ;
117: while(!(*AT91C_PMC_SR & AT91C_PMC_MCKRDY))
118: ;
1.5 nbrk 119:
1.9 nbrk 120: /* 4. Selection of Master Clock and Processor Clock */
121: /* select the PLL clock divided by 2: */
122: *AT91C_PMC_MCKR = AT91C_PMC_PRES_CLK_2;
123: while(!(*AT91C_PMC_SR & AT91C_PMC_MCKRDY))
124: ;
125:
126: *AT91C_PMC_MCKR |= AT91C_PMC_CSS_PLL_CLK;
127: while(!(*AT91C_PMC_SR & AT91C_PMC_MCKRDY))
128: ;
1.5 nbrk 129:
1.12 nbrk 130: /* enable clock to all modules */
1.11 nbrk 131: *AT91C_PMC_PCER = AT91C_ALL_INT;
1.9 nbrk 132:
133: /* initialize USART0 (we clock it in PMC above) */
134:
135: *AT91C_PIOA_PDR = AT91C_PA5_RXD0 | /* Enable RxD0 Pin */
136: AT91C_PA6_TXD0; /* Enalbe TxD0 Pin */
137:
138: *AT91C_US0_MR = AT91C_US_USMODE_NORMAL | /* Normal Mode */
139: AT91C_US_CLKS_CLOCK | /* Clock = MCK */
140: AT91C_US_CHRL_8_BITS | /* 8-bit Data */
141: AT91C_US_PAR_NONE | /* No Parity */
142: AT91C_US_NBSTOP_1_BIT; /* 1 Stop Bit */
143:
144: *AT91C_US0_BRGR = 48054857 / 16 / 9600; /* Baud Rate Divisor */
145:
1.10 nbrk 146: /* enable DMA transfers on USART0 */
147: *AT91C_US0_PTCR = AT91C_PDC_TXTEN | AT91C_PDC_RXTEN;
148:
1.9 nbrk 149: *AT91C_US0_CR = AT91C_US_RXEN | /* Receiver Enable */
150: AT91C_US_TXEN; /* Transmitter Enable */
151:
152: /* redefine putchar */
1.10 nbrk 153: putchar = sausart_early_putchar;
1.1 init 154: }
155:
156:
CVSweb
![[BACK]](/icons/back.gif){kind=icon}
Return to config.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / funnyos / arch / sam7s64