diff options
Diffstat (limited to 'board/sc520_cdp/sc520_cdp.c')
| -rwxr-xr-x | board/sc520_cdp/sc520_cdp.c | 630 |
1 files changed, 630 insertions, 0 deletions
diff --git a/board/sc520_cdp/sc520_cdp.c b/board/sc520_cdp/sc520_cdp.c new file mode 100755 index 0000000..cd52324 --- /dev/null +++ b/board/sc520_cdp/sc520_cdp.c @@ -0,0 +1,630 @@ +/* + * + * (C) Copyright 2002 + * Daniel Engström, 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 <spi.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 + * 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 + */ + +/* + * This function should map a chunk of size bytes + * of the system address space to the ISA bus + * + * The function will return the memory address + * as seen by the host (which may very will be the + * same as the bus address) + */ +u32 isa_map_rom(u32 bus_addr, int size) +{ + u32 par; + + PRINTF("isa_map_rom asked to map %d bytes at %x\n", + size, bus_addr); + + par = size; + if (par < 0x80000) { + par = 0x80000; + } + par >>= 12; + par--; + par&=0x7f; + par <<= 18; + par |= (bus_addr>>12); + par |= 0x50000000; + + PRINTF ("setting PAR11 to %x\n", par); + + /* Map rom 0x10000 with PAR1 */ + write_mmcr_long(SC520_PAR11, par); + + return bus_addr; +} + +/* + * this function removed any mapping created + * with pci_get_rom_window() + */ +void isa_unmap_rom(u32 addr) +{ + PRINTF("isa_unmap_rom asked to unmap %x", addr); + if ((addr>>12) == (read_mmcr_long(SC520_PAR11)&0x3ffff)) { + write_mmcr_long(SC520_PAR11, 0); + PRINTF(" done\n"); + return; + } + PRINTF(" not ours\n"); +} + +#ifdef CONFIG_PCI +#define PCI_ROM_TEMP_SPACE 0x10000 +/* + * This function should map a chunk of size bytes + * of the system address space to the PCI bus, + * suitable to map PCI ROMS (bus address < 16M) + * the function will return the host memory address + * which should be converted into a bus address + * before used to configure the PCI rom address + * decoder + */ +u32 pci_get_rom_window(struct pci_controller *hose, int size) +{ + u32 par; + + par = size; + if (par < 0x80000) { + par = 0x80000; + } + par >>= 16; + par--; + par&=0x7ff; + par <<= 14; + par |= (PCI_ROM_TEMP_SPACE>>16); + par |= 0x72000000; + + PRINTF ("setting PAR1 to %x\n", par); + + /* Map rom 0x10000 with PAR1 */ + write_mmcr_long(SC520_PAR1, par); + + return PCI_ROM_TEMP_SPACE; +} + +/* + * this function removed any mapping created + * with pci_get_rom_window() + */ +void pci_remove_rom_window(struct pci_controller *hose, u32 addr) +{ + PRINTF("pci_remove_rom_window: %x", addr); + if (addr == PCI_ROM_TEMP_SPACE) { + write_mmcr_long(SC520_PAR1, 0); + PRINTF(" done\n"); + return; + } + PRINTF(" not ours\n"); + +} + +/* + * This function is called in order to provide acces to the + * legacy video I/O ports on the PCI bus. + * After this function accesses to I/O ports 0x3b0-0x3bb and + * 0x3c0-0x3df shuld result in transactions on the PCI bus. + * + */ +int pci_enable_legacy_video_ports(struct pci_controller *hose) +{ + /* Map video memory to 0xa0000*/ + write_mmcr_long(SC520_PAR0, 0x7200400a); + + /* forward all I/O accesses to PCI */ + write_mmcr_byte(SC520_ADDDECCTL, + read_mmcr_byte(SC520_ADDDECCTL) | IO_HOLE_DEST_PCI); + + + /* so we map away all io ports to pci (only way to access pci io + * below 0x400. But then we have to map back the portions that we dont + * use so that the generate cycles on the GPIO bus where the sio and + * ISA slots are connected, this requre the use of several PAR registers + */ + + /* bring 0x100 - 0x1ef back to ISA using PAR5 */ + write_mmcr_long(SC520_PAR5, 0x30ef0100); + + /* IDE use 1f0-1f7 */ + + /* bring 0x1f8 - 0x2f7 back to ISA using PAR6 */ + write_mmcr_long(SC520_PAR6, 0x30ff01f8); + + /* com2 use 2f8-2ff */ + + /* bring 0x300 - 0x3af back to ISA using PAR7 */ + write_mmcr_long(SC520_PAR7, 0x30af0300); + + /* vga use 3b0-3bb */ + + /* bring 0x3bc - 0x3bf back to ISA using PAR8 */ + write_mmcr_long(SC520_PAR8, 0x300303bc); + + /* vga use 3c0-3df */ + + /* bring 0x3e0 - 0x3f5 back to ISA using PAR9 */ + write_mmcr_long(SC520_PAR9, 0x301503e0); + + /* ide use 3f6 */ + + /* bring 0x3f7 back to ISA using PAR10 */ + write_mmcr_long(SC520_PAR10, 0x300003f7); + + /* com1 use 3f8-3ff */ + + return 0; +} +#endif + +/* + * Miscelaneous platform dependent initialisations + */ + +int board_init(void) +{ + DECLARE_GLOBAL_DATA_PTR; + + init_sc520(); + bus_init(); + irq_init(); + + /* max drive current on SDRAM */ + write_mmcr_word(SC520_DSCTL, 0x0100); + + /* enter debug mode after next reset (only if jumper is also set) */ + write_mmcr_byte(SC520_RESCFG, 0x08); + /* configure the software timer to 33.333MHz */ + write_mmcr_byte(SC520_SWTMRCFG, 0); + gd->bus_clk = 33333000; + + return 0; +} + +int dram_init(void) +{ + init_sc520_dram(); + return 0; +} + +void show_boot_progress(int val) +{ + 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, char *buffer, int len) +{ + return 0; +} + +int spi_eeprom_write(int x, int offset, char *buffer, int len) +{ + return 0; +} + +void spi_init_f(void) +{ +#ifdef CONFIG_SC520_CDP_USE_SPI + spi_eeprom_probe(1); +#endif +#ifdef CONFIG_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_SC520_CDP_USE_SPI + res = spi_eeprom_read(1, offset, buffer, len); +#endif +#ifdef CONFIG_SC520_CDP_USE_MW + res = mw_eeprom_read(2, offset, buffer, len); +#endif +#if !defined(CONFIG_SC520_CDP_USE_SPI) && !defined(CONFIG_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_SC520_CDP_USE_SPI + res = spi_eeprom_write(1, offset, buffer, len); +#endif +#ifdef CONFIG_SC520_CDP_USE_MW + res = mw_eeprom_write(2, offset, buffer, len); +#endif +#if !defined(CONFIG_SC520_CDP_USE_SPI) && !defined(CONFIG_SC520_CDP_USE_MW) + res = 0; +#endif + return res; +} |