/* *  * (C) Copyright 2002 * Daniel Engstr鰉, Omicron Ceti AB <daniel@omicron.se>. * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * 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 * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */#include <common.h>#include <pci.h>#include <asm/io.h>#include <asm/pci.h>#include <asm/ic/sc520.h>#include <asm/ic/ali512x.h>#include <ssi.h>#undef SC520_CDP_DEBUG#ifdef	SC520_CDP_DEBUG#define	PRINTF(fmt,args...)	printf (fmt ,##args)#else#define PRINTF(fmt,args...)#endif/* ------------------------------------------------------------------------- */	/*  * Theory: * We first set up all IRQs to be non-pci, edge triggered, * when we later enumerate the pci bus and pci_sc520_fixup_irq() gets  * called we reallocate irqs to the pci bus with sc520_pci_set_irq() * as needed. Whe choose the irqs to gram from a configurable list * inside pci_sc520_fixup_irq() (If this list contains stupid irq's * such as 0 thngas will not work) */static void irq_init(void){	/* disable global interrupt mode */	write_mmcr_byte(SC520_PICICR, 0x40); 		/* set all irqs to edge */	write_mmcr_byte(SC520_MPICMODE, 0x00);	write_mmcr_byte(SC520_SL1PICMODE, 0x00);	write_mmcr_byte(SC520_SL2PICMODE, 0x00);		/* active low polarity on PIC interrupt pins, 	 *  active high polarity on all other irq pins */	write_mmcr_word(SC520_INTPINPOL, 0x0000);	/* set irq number mapping */	write_mmcr_byte(SC520_GPTMR0MAP, SC520_IRQ_DISABLED);   /* disable GP timer 0 INT */       	write_mmcr_byte(SC520_GPTMR1MAP, SC520_IRQ_DISABLED);   /* disable GP timer 1 INT */	write_mmcr_byte(SC520_GPTMR2MAP, SC520_IRQ_DISABLED);   /* disable GP timer 2 INT */	write_mmcr_byte(SC520_PIT0MAP, SC520_IRQ0);             /* Set PIT timer 0 INT to IRQ0 */ 	write_mmcr_byte(SC520_PIT1MAP, SC520_IRQ_DISABLED);     /* disable PIT timer 1 INT */	write_mmcr_byte(SC520_PIT2MAP, SC520_IRQ_DISABLED);     /* disable PIT timer 2 INT */	write_mmcr_byte(SC520_PCIINTAMAP, SC520_IRQ_DISABLED);  /* disable PCI INT A */	write_mmcr_byte(SC520_PCIINTBMAP, SC520_IRQ_DISABLED);  /* disable PCI INT B */	write_mmcr_byte(SC520_PCIINTCMAP, SC520_IRQ_DISABLED);  /* disable PCI INT C */	write_mmcr_byte(SC520_PCIINTDMAP, SC520_IRQ_DISABLED);  /* disable PCI INT D */	write_mmcr_byte(SC520_DMABCINTMAP, SC520_IRQ_DISABLED); /* disable DMA INT */ 	write_mmcr_byte(SC520_SSIMAP, SC520_IRQ_DISABLED);      /* disable Synchronius serial INT */	write_mmcr_byte(SC520_WDTMAP, SC520_IRQ_DISABLED);      /* disable Watchdog INT */	write_mmcr_byte(SC520_RTCMAP, SC520_IRQ8);              /* Set RTC int to 8 */	write_mmcr_byte(SC520_WPVMAP, SC520_IRQ_DISABLED);      /* disable write protect INT */	write_mmcr_byte(SC520_ICEMAP, SC520_IRQ1);              /* Set ICE Debug Serielport INT to IRQ1 */	write_mmcr_byte(SC520_FERRMAP,SC520_IRQ13);             /* Set FP error INT to IRQ13 */		if (CFG_USE_SIO_UART) {		write_mmcr_byte(SC520_UART1MAP, SC520_IRQ_DISABLED); /* disable internal UART1 INT */		write_mmcr_byte(SC520_UART2MAP, SC520_IRQ_DISABLED); /* disable internal UART2 INT */		write_mmcr_byte(SC520_GP3IMAP, SC520_IRQ3);          /* Set GPIRQ3 (ISA IRQ3) to IRQ3 */ 		write_mmcr_byte(SC520_GP4IMAP, SC520_IRQ4);          /* Set GPIRQ4 (ISA IRQ4) to IRQ4 */	} else {		write_mmcr_byte(SC520_UART1MAP, SC520_IRQ4);         /* Set internal UART2 INT to IRQ4 */		write_mmcr_byte(SC520_UART2MAP, SC520_IRQ3);         /* Set internal UART2 INT to IRQ3 */		write_mmcr_byte(SC520_GP3IMAP, SC520_IRQ_DISABLED);  /* disable GPIRQ3 (ISA IRQ3) */ 		write_mmcr_byte(SC520_GP4IMAP, SC520_IRQ_DISABLED);  /* disable GPIRQ4 (ISA IRQ4) */	}		write_mmcr_byte(SC520_GP1IMAP, SC520_IRQ1);             /* Set GPIRQ1 (SIO IRQ1) to IRQ1 */	write_mmcr_byte(SC520_GP5IMAP, SC520_IRQ5);             /* Set GPIRQ5 (ISA IRQ5) to IRQ5 */	write_mmcr_byte(SC520_GP6IMAP, SC520_IRQ6);             /* Set GPIRQ6 (ISA IRQ6) to IRQ6 */	write_mmcr_byte(SC520_GP7IMAP, SC520_IRQ7);             /* Set GPIRQ7 (ISA IRQ7) to IRQ7 */	write_mmcr_byte(SC520_GP8IMAP, SC520_IRQ8);             /* Set GPIRQ8 (SIO IRQ8) to IRQ8 */	write_mmcr_byte(SC520_GP9IMAP, SC520_IRQ9);             /* Set GPIRQ9 (ISA IRQ2) to IRQ9 */	write_mmcr_byte(SC520_GP0IMAP, SC520_IRQ11);            /* Set GPIRQ0 (ISA IRQ11) to IRQ10 */	write_mmcr_byte(SC520_GP2IMAP, SC520_IRQ12);            /* Set GPIRQ2 (ISA IRQ12) to IRQ12 */	write_mmcr_byte(SC520_GP10IMAP,SC520_IRQ14);            /* Set GPIRQ10 (ISA IRQ14) to IRQ14 */          		write_mmcr_word(SC520_PCIHOSTMAP, 0x11f);                /* Map PCI hostbridge INT to NMI */	write_mmcr_word(SC520_ECCMAP, 0x100);                    /* Map SDRAM ECC failure INT to NMI */ }	/* PCI stuff */static void pci_sc520_cdp_fixup_irq(struct pci_controller *hose, pci_dev_t dev){	/* a configurable lists of irqs to steal	 * when we need one (a board with more pci interrupt pins	 * would use a larger table */	static int irq_list[] = {		CFG_FIRST_PCI_IRQ,		CFG_SECOND_PCI_IRQ,		CFG_THIRD_PCI_IRQ,		CFG_FORTH_PCI_IRQ	};	static int next_irq_index=0;		char tmp_pin;		int pin;		pci_hose_read_config_byte(hose, dev, PCI_INTERRUPT_PIN, &tmp_pin);	pin = tmp_pin;		pin-=1; /* pci config space use 1-based numbering */	if (-1 == pin) {		return; /* device use no irq */	}		       	/* map device number +  pin to a pin on the sc520 */	switch (PCI_DEV(dev)) {	case 20:		pin+=SC520_PCI_INTA;		break;			case 19:		pin+=SC520_PCI_INTB;		break;			case 18:		pin+=SC520_PCI_INTC;		break;			case 17:		pin+=SC520_PCI_INTD;		break;			default: 		return;	}		pin&=3; /* wrap around */		if (sc520_pci_ints[pin] == -1) {		/* re-route one interrupt for us */				if (next_irq_index > 3) {			return;		}		if (pci_sc520_set_irq(pin, irq_list[next_irq_index])) { 			return;		}		next_irq_index++;	}		if (-1 != sc520_pci_ints[pin]) {		pci_hose_write_config_byte(hose, dev, PCI_INTERRUPT_LINE, 					   sc520_pci_ints[pin]);	}	PRINTF("fixup_irq: device %d pin %c irq %d\n", 	       PCI_DEV(dev), 'A' + pin, sc520_pci_ints[pin]);} static struct pci_controller sc520_cdp_hose = {	fixup_irq: pci_sc520_cdp_fixup_irq,};void pci_init_board(void){	pci_sc520_init(&sc520_cdp_hose);}static void silence_uart(int port){	outb(0, port+1);}void setup_ali_sio(int uart_primary){	ali512x_init();		ali512x_set_fdc(ALI_ENABLED, 0x3f2, 6, 0);	ali512x_set_pp(ALI_ENABLED, 0x278, 7, 3);	ali512x_set_uart(ALI_ENABLED, ALI_UART1, uart_primary?0x3f8:0x3e8, 4);	ali512x_set_uart(ALI_ENABLED, ALI_UART2, uart_primary?0x2f8:0x2e8, 3);	ali512x_set_rtc(ALI_DISABLED, 0, 0);	ali512x_set_kbc(ALI_ENABLED, 1, 12);	ali512x_set_cio(ALI_ENABLED);		/* IrDa pins */	ali512x_cio_function(12, 1, 0, 0);	ali512x_cio_function(13, 1, 0, 0);		/* SSI chip select pins */	ali512x_cio_function(14, 0, 0, 0);  /* SSI_CS */	ali512x_cio_function(15, 0, 0, 0);  /* SSI_MV */ 	ali512x_cio_function(16, 0, 0, 0);  /* SSI_SPI# */	/* Board REV pins */	ali512x_cio_function(20, 0, 0, 1);	ali512x_cio_function(21, 0, 0, 1);	ali512x_cio_function(22, 0, 0, 1);	ali512x_cio_function(23, 0, 0, 1);      }/* set up the ISA bus timing and system address mappings */static void bus_init(void){	/* set up the GP IO pins */	write_mmcr_word(SC520_PIOPFS31_16, 0xf7ff); 	/* set the GPIO pin function 31-16 reg */		   	write_mmcr_word(SC520_PIOPFS15_0, 0xffff);  	/* set the GPIO pin function 15-0 reg */	write_mmcr_byte(SC520_CSPFS, 0xf8);  		/* set the CS pin function  reg */		write_mmcr_byte(SC520_CLKSEL, 0x70);		write_mmcr_byte(SC520_GPCSRT, 1);   /* set the GP CS offset */    		write_mmcr_byte(SC520_GPCSPW, 3);   /* set the GP CS pulse width */	write_mmcr_byte(SC520_GPCSOFF, 1);  /* set the GP CS offset */	write_mmcr_byte(SC520_GPRDW, 3);    /* set the RD pulse width */	write_mmcr_byte(SC520_GPRDOFF, 1);  /* set the GP RD offset */        write_mmcr_byte(SC520_GPWRW, 3);    /* set the GP WR pulse width */	write_mmcr_byte(SC520_GPWROFF, 1);  /* set the GP WR offset */	write_mmcr_word(SC520_BOOTCSCTL, 0x1823);		/* set up timing of BOOTCS */ 	write_mmcr_word(SC520_ROMCS1CTL, 0x1823);		/* set up timing of ROMCS1 */	write_mmcr_word(SC520_ROMCS2CTL, 0x1823);		/* set up timing of ROMCS2 */ 		/* adjust the memory map:	 * by default the first 256MB (0x00000000 - 0x0fffffff) is mapped to SDRAM	 * and 256MB to 1G-128k  (0x1000000 - 0x37ffffff) is mapped to PCI mmio	 * we need to map 1G-128k - 1G (0x38000000 - 0x3fffffff) to CS1 */ 					/* SRAM = GPCS3 128k @ d0000-effff*/	write_mmcr_long(SC520_PAR2,  0x4e00400d);				/* IDE0 = GPCS6 1f0-1f7 */	write_mmcr_long(SC520_PAR3,  0x380801f0);			/* IDE1 = GPCS7 3f6 */	write_mmcr_long(SC520_PAR4,  0x3c0003f6);			/* bootcs */	write_mmcr_long(SC520_PAR12, 0x8bffe800);			/* romcs2 */	write_mmcr_long(SC520_PAR13, 0xcbfff000);			/* romcs1 */	write_mmcr_long(SC520_PAR14, 0xabfff800);			/* 680 LEDS */	write_mmcr_long(SC520_PAR15, 0x30000640);				write_mmcr_byte(SC520_ADDDECCTL, 0);		asm ("wbinvd\n"); /* Flush cache, req. after setting the unchached attribute ona PAR */		if (CFG_USE_SIO_UART) {		write_mmcr_byte(SC520_ADDDECCTL, read_mmcr_byte(SC520_ADDDECCTL) | UART2_DIS|UART1_DIS);			setup_ali_sio(1);	} else {		write_mmcr_byte(SC520_ADDDECCTL, read_mmcr_byte(SC520_ADDDECCTL) & ~(UART2_DIS|UART1_DIS));		setup_ali_sio(0);		silence_uart(0x3e8);		silence_uart(0x2e8);	}}/* GPCS usage * GPCS0       PIO27 (NMI) * GPCS1       ROMCS1 * GPCS2       ROMCS2 * GPCS3       SRAMCS       PAR2 * GPCS4       unused       PAR3 * GPCS5       unused       PAR4 * GPCS6       IDE * GPCS7       IDE *//* par usage: * PAR0   legacy_video * PAR1   PCI ROM mapping * PAR2   SRAM