Annotation of funnyos/arch/sam7s64/config.c, Revision 1.18
1.1 init 1: /*
1.18 ! nbrk 2: * $Id: config.c,v 1.17 2007/12/25 14:11:18 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;
1.14 nbrk 22: extern struct driver gpiobtn_dr;
1.15 nbrk 23: extern struct driver saspi_dr;
1.16 nbrk 24: extern struct driver spisdmmc_dr;
1.17 nbrk 25: extern struct driver sdmmc_dr;
1.18 ! nbrk 26: extern struct driver gpio7seg_dr;
1.1 init 27:
1.9 nbrk 28: extern void (*putchar)(char);
1.10 nbrk 29: extern void sausart_early_putchar(char ch);
1.1 init 30:
31: /* amount of physical memory, in Bytes */
1.5 nbrk 32: uint32_t physmem = 16384 /* 16KB :) */;
1.1 init 33:
34: /*
35: * Where to attach each device.
36: */
37: struct attachinfo config_attachinfo[] = {
38: /* child, parent, pminor, loc, intrno, flags */
1.14 nbrk 39: { "cpu" , "root", 0, 0, -1, 0 },
40: { "saapbus","root", 0, 0, -1, 0 },
41: { "sapio", "saapbus", 0, 0, -1, 0 },
42: { "gpioled","sapio", 0, 17, -1, 0 },
43: { "gpioled","sapio", 0, 18, -1, 0 },
44: { "gpiobtn","sapio", 0, 19, 0, 0 /*controls gpioled/0*/},
45: { "gpiobtn","sapio", 0, 20, 30, 0 /*controls gpioled/1*/},
1.18 ! nbrk 46: { "gpio7seg","sapio", 0, 0, -1, 0 },
1.14 nbrk 47: // { "sartt", "saapbus", 0, 0, 1, 0 },
1.15 nbrk 48: { "saspi", "saapbus", 0, 0, 0, 0 },
1.18 ! nbrk 49: // { "spisdmmc","saspi", 0, 0, 0, 0 },
! 50: // { "sdmmc", "spisdmmc", 0, 0, 0, 0 },
1.15 nbrk 51: // { "saaic", "saapbus", 0, 0, -1, 0 },
1.14 nbrk 52: { NULL, NULL, 0, 0, -1, 0 }
1.1 init 53: };
54:
55:
56: /*
57: * Link device names with their drivers.
58: */
59: struct driverinfo config_driverinfo[] = {
60: /* name, driverp, ninstances (should be -1) */
61: { "root", &root_dr, -1 },
62: { "cpu" , &cpu_dr, -1 },
1.3 init 63: { "saapbus" , &saapbus_dr, -1 },
1.7 nbrk 64: { "sapio", &sapio_dr, -1 },
1.8 nbrk 65: { "gpioled", &gpioled_dr, -1 },
1.13 nbrk 66: { "saaic", &saaic_dr, -1 },
67: { "sartt", &sartt_dr, -1 },
1.15 nbrk 68: { "gpiobtn", &gpiobtn_dr, -1 },
69: { "saspi", &saspi_dr, -1 },
1.16 nbrk 70: { "spisdmmc", &spisdmmc_dr, -1 },
1.17 nbrk 71: { "sdmmc", &sdmmc_dr, -1 },
1.18 ! nbrk 72: { "gpio7seg", &gpio7seg_dr, -1 },
1.1 init 73: { NULL, NULL, 0 }
74: };
75:
76:
77: /*
78: * Machine early-stage initialization hooks.
79: */
80:
81: void
1.4 nbrk 82: config_machineinit(void)
1.1 init 83: {
84: /*
1.4 nbrk 85: * Initialize critical devices at startup.
1.1 init 86: */
1.9 nbrk 87: __cpu_disable_irq();
1.4 nbrk 88:
1.5 nbrk 89: /* disable watchdog */
1.9 nbrk 90: *AT91C_WDTC_WDMR = AT91C_WDTC_WDDIS;
1.5 nbrk 91:
1.9 nbrk 92: /* set FLASH to high-speed */
93: *AT91C_MC_FMR = AT91C_MC_FWS_0FWS;
1.5 nbrk 94:
1.11 nbrk 95: /* enable user RESET (magic button on board) */
96: *AT91C_RSTC_RMR = AT91C_RSTC_URSTEN | AT91C_RSTC_KEY;
97:
1.5 nbrk 98: /*
1.9 nbrk 99: * Initialize oscillators.
100: * Taken from Atmel's examples.
1.6 nbrk 101: */
1.9 nbrk 102: /* Set MCK at 48 054 850 */
1.6 nbrk 103:
1.9 nbrk 104: /* 1 Enabling the Main Oscillator */
105: /* SCK = 1/32768 = 30.51 uSecond
106: * Start up time = 8 * 6 / SCK = 56 * 30.51 = 1,46484375 ms
1.5 nbrk 107: */
1.9 nbrk 108: *AT91C_PMC_MOR = ( (AT91C_CKGR_OSCOUNT & (0x06 <<8)) | AT91C_CKGR_MOSCEN);
1.5 nbrk 109:
1.9 nbrk 110: /* Wait the startup time */
111: while(!(*AT91C_PMC_SR & AT91C_PMC_MOSCS))
112: ;
1.5 nbrk 113:
1.9 nbrk 114: /* 2 Checking the Main Oscillator Frequency (Optional) */
115: /* TODO */
1.5 nbrk 116:
1.9 nbrk 117: /* 3 Setting PLL and divider: */
118: /* - div by 14 Fin = 1.3165 =(18,432 / 14)
119: * - Mul 72+1: Fout = 96.1097 =(3,6864 *73)
120: * for 96 MHz the erroe is 0.11%
121: * Field out NOT USED = 0
122: * PLLCOUNT pll startup time estimate at : 0.844 ms
123: * PLLCOUNT 28 = 0.000844 /(1/32768)
124: */
125: *AT91C_PMC_PLLR = ( (AT91C_CKGR_DIV & 14 ) |
126: (AT91C_CKGR_PLLCOUNT & (28<<8)) |
127: (AT91C_CKGR_MUL & (72<<16)) );
1.5 nbrk 128:
1.9 nbrk 129: /* Wait the startup time */
130: while(!(*AT91C_PMC_SR & AT91C_PMC_LOCK))
131: ;
132: while(!(*AT91C_PMC_SR & AT91C_PMC_MCKRDY))
133: ;
1.5 nbrk 134:
1.9 nbrk 135: /* 4. Selection of Master Clock and Processor Clock */
136: /* select the PLL clock divided by 2: */
137: *AT91C_PMC_MCKR = AT91C_PMC_PRES_CLK_2;
138: while(!(*AT91C_PMC_SR & AT91C_PMC_MCKRDY))
139: ;
140:
141: *AT91C_PMC_MCKR |= AT91C_PMC_CSS_PLL_CLK;
142: while(!(*AT91C_PMC_SR & AT91C_PMC_MCKRDY))
143: ;
1.5 nbrk 144:
1.12 nbrk 145: /* enable clock to all modules */
1.11 nbrk 146: *AT91C_PMC_PCER = AT91C_ALL_INT;
1.9 nbrk 147:
148: /* initialize USART0 (we clock it in PMC above) */
149:
150: *AT91C_PIOA_PDR = AT91C_PA5_RXD0 | /* Enable RxD0 Pin */
151: AT91C_PA6_TXD0; /* Enalbe TxD0 Pin */
152:
153: *AT91C_US0_MR = AT91C_US_USMODE_NORMAL | /* Normal Mode */
154: AT91C_US_CLKS_CLOCK | /* Clock = MCK */
155: AT91C_US_CHRL_8_BITS | /* 8-bit Data */
156: AT91C_US_PAR_NONE | /* No Parity */
157: AT91C_US_NBSTOP_1_BIT; /* 1 Stop Bit */
158:
159: *AT91C_US0_BRGR = 48054857 / 16 / 9600; /* Baud Rate Divisor */
160:
1.10 nbrk 161: /* enable DMA transfers on USART0 */
162: *AT91C_US0_PTCR = AT91C_PDC_TXTEN | AT91C_PDC_RXTEN;
163:
1.9 nbrk 164: *AT91C_US0_CR = AT91C_US_RXEN | /* Receiver Enable */
165: AT91C_US_TXEN; /* Transmitter Enable */
166:
167: /* redefine putchar */
1.10 nbrk 168: putchar = sausart_early_putchar;
1.1 init 169: }
170:
171:
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