u-boot/board/sc520_cdp/sc520_cdp.c

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/*
*
* (C) Copyright 2002
* Daniel Engstr<EFBFBD>m, 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 <asm/io.h>
#include <asm/ic/sc520.h>
#include <ali512x.h>
#include <spi.h>
#include <netdev.h>
DECLARE_GLOBAL_DATA_PTR;
#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 */
sc520_mmcr->picicr = 0x40;
/* set all irqs to edge */
sc520_mmcr->pic_mode[0] = 0x00;
sc520_mmcr->pic_mode[1] = 0x00;
sc520_mmcr->pic_mode[2] = 0x00;
/* active low polarity on PIC interrupt pins,
* active high polarity on all other irq pins */
sc520_mmcr->intpinpol = 0x0000;
/* set irq number mapping */
sc520_mmcr->gp_tmr_int_map[0] = SC520_IRQ_DISABLED; /* disable GP timer 0 INT */
sc520_mmcr->gp_tmr_int_map[1] = SC520_IRQ_DISABLED; /* disable GP timer 1 INT */
sc520_mmcr->gp_tmr_int_map[2] = SC520_IRQ_DISABLED; /* disable GP timer 2 INT */
sc520_mmcr->pit_int_map[0] = SC520_IRQ0; /* Set PIT timer 0 INT to IRQ0 */
sc520_mmcr->pit_int_map[1] = SC520_IRQ_DISABLED; /* disable PIT timer 1 INT */
sc520_mmcr->pit_int_map[2] = SC520_IRQ_DISABLED; /* disable PIT timer 2 INT */
sc520_mmcr->pci_int_map[0] = SC520_IRQ_DISABLED; /* disable PCI INT A */
sc520_mmcr->pci_int_map[1] = SC520_IRQ_DISABLED; /* disable PCI INT B */
sc520_mmcr->pci_int_map[2] = SC520_IRQ_DISABLED; /* disable PCI INT C */
sc520_mmcr->pci_int_map[3] = SC520_IRQ_DISABLED; /* disable PCI INT D */
sc520_mmcr->dmabcintmap = SC520_IRQ_DISABLED; /* disable DMA INT */
sc520_mmcr->ssimap = SC520_IRQ_DISABLED; /* disable Synchronius serial INT */
sc520_mmcr->wdtmap = SC520_IRQ_DISABLED; /* disable Watchdog INT */
sc520_mmcr->rtcmap = SC520_IRQ8; /* Set RTC int to 8 */
sc520_mmcr->wpvmap = SC520_IRQ_DISABLED; /* disable write protect INT */
sc520_mmcr->icemap = SC520_IRQ1; /* Set ICE Debug Serielport INT to IRQ1 */
sc520_mmcr->ferrmap = SC520_IRQ13; /* Set FP error INT to IRQ13 */
if (CONFIG_SYS_USE_SIO_UART) {
sc520_mmcr->uart_int_map[0] = SC520_IRQ_DISABLED; /* disable internal UART1 INT */
sc520_mmcr->uart_int_map[1] = SC520_IRQ_DISABLED; /* disable internal UART2 INT */
sc520_mmcr->gp_int_map[3] = SC520_IRQ3; /* Set GPIRQ3 (ISA IRQ3) to IRQ3 */
sc520_mmcr->gp_int_map[4] = SC520_IRQ4; /* Set GPIRQ4 (ISA IRQ4) to IRQ4 */
} else {
sc520_mmcr->uart_int_map[0] = SC520_IRQ4; /* Set internal UART2 INT to IRQ4 */
sc520_mmcr->uart_int_map[1] = SC520_IRQ3; /* Set internal UART2 INT to IRQ3 */
sc520_mmcr->gp_int_map[3] = SC520_IRQ_DISABLED; /* disable GPIRQ3 (ISA IRQ3) */
sc520_mmcr->gp_int_map[4] = SC520_IRQ_DISABLED; /* disable GPIRQ4 (ISA IRQ4) */
}
sc520_mmcr->gp_int_map[1] = SC520_IRQ1; /* Set GPIRQ1 (SIO IRQ1) to IRQ1 */
sc520_mmcr->gp_int_map[5] = SC520_IRQ5; /* Set GPIRQ5 (ISA IRQ5) to IRQ5 */
sc520_mmcr->gp_int_map[6] = SC520_IRQ6; /* Set GPIRQ6 (ISA IRQ6) to IRQ6 */
sc520_mmcr->gp_int_map[7] = SC520_IRQ7; /* Set GPIRQ7 (ISA IRQ7) to IRQ7 */
sc520_mmcr->gp_int_map[8] = SC520_IRQ8; /* Set GPIRQ8 (SIO IRQ8) to IRQ8 */
sc520_mmcr->gp_int_map[9] = SC520_IRQ9; /* Set GPIRQ9 (ISA IRQ2) to IRQ9 */
sc520_mmcr->gp_int_map[0] = SC520_IRQ11; /* Set GPIRQ0 (ISA IRQ11) to IRQ10 */
sc520_mmcr->gp_int_map[2] = SC520_IRQ12; /* Set GPIRQ2 (ISA IRQ12) to IRQ12 */
sc520_mmcr->gp_int_map[10] = SC520_IRQ14; /* Set GPIRQ10 (ISA IRQ14) to IRQ14 */
sc520_mmcr->pcihostmap = 0x11f; /* Map PCI hostbridge INT to NMI */
sc520_mmcr->eccmap = 0x100; /* Map SDRAM ECC failure INT to NMI */
}
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 */
sc520_mmcr->piopfs31_16 = 0xf7ff; /* set the GPIO pin function 31-16 reg */
sc520_mmcr->piopfs15_0 = 0xffff; /* set the GPIO pin function 15-0 reg */
sc520_mmcr->cspfs = 0xf8; /* set the CS pin function reg */
sc520_mmcr->clksel = 0x70;
sc520_mmcr->gpcsrt = 1; /* set the GP CS offset */
sc520_mmcr->gpcspw = 3; /* set the GP CS pulse width */
sc520_mmcr->gpcsoff = 1; /* set the GP CS offset */
sc520_mmcr->gprdw = 3; /* set the RD pulse width */
sc520_mmcr->gprdoff = 1; /* set the GP RD offset */
sc520_mmcr->gpwrw = 3; /* set the GP WR pulse width */
sc520_mmcr->gpwroff = 1; /* set the GP WR offset */
sc520_mmcr->bootcsctl = 0x1823; /* set up timing of BOOTCS */
sc520_mmcr->romcs1ctl = 0x1823; /* set up timing of ROMCS1 */
sc520_mmcr->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*/
sc520_mmcr->par[2] = 0x4e00400d;
/* IDE0 = GPCS6 1f0-1f7 */
sc520_mmcr->par[3] = 0x380801f0;
/* IDE1 = GPCS7 3f6 */
sc520_mmcr->par[4] = 0x3c0003f6;
/* bootcs */
sc520_mmcr->par[12] = 0x8bffe800;
/* romcs2 */
sc520_mmcr->par[13] = 0xcbfff000;
/* romcs1 */
sc520_mmcr->par[14] = 0xabfff800;
/* 680 LEDS */
sc520_mmcr->par[15] = 0x30000640;
sc520_mmcr->adddecctl = 0;
asm ("wbinvd\n"); /* Flush cache, req. after setting the unchached attribute ona PAR */
if (CONFIG_SYS_USE_SIO_UART) {
sc520_mmcr->adddecctl = sc520_mmcr->adddecctl | UART2_DIS | UART1_DIS;
setup_ali_sio(1);
} else {
sc520_mmcr->adddecctl = sc520_mmcr->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
* PAR3 IDE
* PAR4 IDE
* PAR5 legacy_video
* PAR6 legacy_video
* PAR7 legacy_video
* PAR8 legacy_video
* PAR9 legacy_video
* PAR10 legacy_video
* PAR11 ISAROM
* PAR12 BOOTCS
* PAR13 ROMCS1
* PAR14 ROMCS2
* PAR15 Port 0x680 LED display
*/
/*
* Miscelaneous platform dependent initialisations
*/
int board_init(void)
{
init_sc520();
bus_init();
irq_init();
/* max drive current on SDRAM */
sc520_mmcr->dsctl = 0x0100;
/* enter debug mode after next reset (only if jumper is also set) */
sc520_mmcr->rescfg = 0x08;
/* configure the software timer to 33.333MHz */
sc520_mmcr->swtmrcfg = 0;
gd->bus_clk = 33333000;
return 0;
}
int dram_init(void)
{
init_sc520_dram();
return 0;
}
void show_boot_progress(int val)
{
if (val < -32) val = -1; /* let things compatible */
outb(val&0xff, 0x80);
outb((val&0xff00)>>8, 0x680);
}
int last_stage_init(void)
{
int minor;
int major;
major = minor = 0;
major |= ali512x_cio_in(23)?2:0;
major |= ali512x_cio_in(22)?1:0;
minor |= ali512x_cio_in(21)?2:0;
minor |= ali512x_cio_in(20)?1:0;
printf("AMD SC520 CDP revision %d.%d\n", major, minor);
return 0;
}
void ssi_chip_select(int dev)
{
/* Spunk board: SPI EEPROM is active-low, MW EEPROM and AUX are active high */
switch (dev) {
case 1: /* SPI EEPROM */
ali512x_cio_out(16, 0);
break;
case 2: /* MW EEPROM */
ali512x_cio_out(15, 1);
break;
case 3: /* AUX */
ali512x_cio_out(14, 1);
break;
case 0:
ali512x_cio_out(16, 1);
ali512x_cio_out(15, 0);
ali512x_cio_out(14, 0);
break;
default:
printf("Illegal SSI device requested: %d\n", dev);
}
}
void spi_eeprom_probe(int x)
{
}
int spi_eeprom_read(int x, int offset, uchar *buffer, int len)
{
return 0;
}
int spi_eeprom_write(int x, int offset, uchar *buffer, int len)
{
return 0;
}
void spi_init_f(void)
{
#ifdef CONFIG_SYS_SC520_CDP_USE_SPI
spi_eeprom_probe(1);
#endif
#ifdef CONFIG_SYS_SC520_CDP_USE_MW
mw_eeprom_probe(2);
#endif
}
ssize_t spi_read(uchar *addr, int alen, uchar *buffer, int len)
{
int offset;
int i;
ssize_t res;
offset = 0;
for (i=0;i<alen;i++) {
offset <<= 8;
offset |= addr[i];
}
#ifdef CONFIG_SYS_SC520_CDP_USE_SPI
res = spi_eeprom_read(1, offset, buffer, len);
#endif
#ifdef CONFIG_SYS_SC520_CDP_USE_MW
res = mw_eeprom_read(2, offset, buffer, len);
#endif
#if !defined(CONFIG_SYS_SC520_CDP_USE_SPI) && !defined(CONFIG_SYS_SC520_CDP_USE_MW)
res = 0;
#endif
return res;
}
ssize_t spi_write(uchar *addr, int alen, uchar *buffer, int len)
{
int offset;
int i;
ssize_t res;
offset = 0;
for (i=0;i<alen;i++) {
offset <<= 8;
offset |= addr[i];
}
#ifdef CONFIG_SYS_SC520_CDP_USE_SPI
res = spi_eeprom_write(1, offset, buffer, len);
#endif
#ifdef CONFIG_SYS_SC520_CDP_USE_MW
res = mw_eeprom_write(2, offset, buffer, len);
#endif
#if !defined(CONFIG_SYS_SC520_CDP_USE_SPI) && !defined(CONFIG_SYS_SC520_CDP_USE_MW)
res = 0;
#endif
return res;
}
int board_eth_init(bd_t *bis)
{
return pci_eth_init(bis);
}