4 * Daniel Engström, Omicron Ceti AB <daniel@omicron.se>.
6 * See file CREDITS for list of people who contributed to this
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 2 of
12 * the License, or (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
29 #include <asm/ic/sc520.h>
30 #include <asm/ic/ali512x.h>
33 #undef SC520_CDP_DEBUG
35 #ifdef SC520_CDP_DEBUG
36 #define PRINTF(fmt,args...) printf (fmt ,##args)
38 #define PRINTF(fmt,args...)
41 /* ------------------------------------------------------------------------- */
46 * We first set up all IRQs to be non-pci, edge triggered,
47 * when we later enumerate the pci bus and pci_sc520_fixup_irq() gets
48 * called we reallocate irqs to the pci bus with sc520_pci_set_irq()
49 * as needed. Whe choose the irqs to gram from a configurable list
50 * inside pci_sc520_fixup_irq() (If this list contains stupid irq's
51 * such as 0 thngas will not work)
54 static void irq_init(void)
56 /* disable global interrupt mode */
57 write_mmcr_byte(SC520_PICICR, 0x40);
59 /* set all irqs to edge */
60 write_mmcr_byte(SC520_MPICMODE, 0x00);
61 write_mmcr_byte(SC520_SL1PICMODE, 0x00);
62 write_mmcr_byte(SC520_SL2PICMODE, 0x00);
64 /* active low polarity on PIC interrupt pins,
65 * active high polarity on all other irq pins */
66 write_mmcr_word(SC520_INTPINPOL, 0x0000);
68 /* set irq number mapping */
69 write_mmcr_byte(SC520_GPTMR0MAP, SC520_IRQ_DISABLED); /* disable GP timer 0 INT */
70 write_mmcr_byte(SC520_GPTMR1MAP, SC520_IRQ_DISABLED); /* disable GP timer 1 INT */
71 write_mmcr_byte(SC520_GPTMR2MAP, SC520_IRQ_DISABLED); /* disable GP timer 2 INT */
72 write_mmcr_byte(SC520_PIT0MAP, SC520_IRQ0); /* Set PIT timer 0 INT to IRQ0 */
73 write_mmcr_byte(SC520_PIT1MAP, SC520_IRQ_DISABLED); /* disable PIT timer 1 INT */
74 write_mmcr_byte(SC520_PIT2MAP, SC520_IRQ_DISABLED); /* disable PIT timer 2 INT */
75 write_mmcr_byte(SC520_PCIINTAMAP, SC520_IRQ_DISABLED); /* disable PCI INT A */
76 write_mmcr_byte(SC520_PCIINTBMAP, SC520_IRQ_DISABLED); /* disable PCI INT B */
77 write_mmcr_byte(SC520_PCIINTCMAP, SC520_IRQ_DISABLED); /* disable PCI INT C */
78 write_mmcr_byte(SC520_PCIINTDMAP, SC520_IRQ_DISABLED); /* disable PCI INT D */
79 write_mmcr_byte(SC520_DMABCINTMAP, SC520_IRQ_DISABLED); /* disable DMA INT */
80 write_mmcr_byte(SC520_SSIMAP, SC520_IRQ_DISABLED); /* disable Synchronius serial INT */
81 write_mmcr_byte(SC520_WDTMAP, SC520_IRQ_DISABLED); /* disable Watchdog INT */
82 write_mmcr_byte(SC520_RTCMAP, SC520_IRQ8); /* Set RTC int to 8 */
83 write_mmcr_byte(SC520_WPVMAP, SC520_IRQ_DISABLED); /* disable write protect INT */
84 write_mmcr_byte(SC520_ICEMAP, SC520_IRQ1); /* Set ICE Debug Serielport INT to IRQ1 */
85 write_mmcr_byte(SC520_FERRMAP,SC520_IRQ13); /* Set FP error INT to IRQ13 */
87 if (CFG_USE_SIO_UART) {
88 write_mmcr_byte(SC520_UART1MAP, SC520_IRQ_DISABLED); /* disable internal UART1 INT */
89 write_mmcr_byte(SC520_UART2MAP, SC520_IRQ_DISABLED); /* disable internal UART2 INT */
90 write_mmcr_byte(SC520_GP3IMAP, SC520_IRQ3); /* Set GPIRQ3 (ISA IRQ3) to IRQ3 */
91 write_mmcr_byte(SC520_GP4IMAP, SC520_IRQ4); /* Set GPIRQ4 (ISA IRQ4) to IRQ4 */
93 write_mmcr_byte(SC520_UART1MAP, SC520_IRQ4); /* Set internal UART2 INT to IRQ4 */
94 write_mmcr_byte(SC520_UART2MAP, SC520_IRQ3); /* Set internal UART2 INT to IRQ3 */
95 write_mmcr_byte(SC520_GP3IMAP, SC520_IRQ_DISABLED); /* disable GPIRQ3 (ISA IRQ3) */
96 write_mmcr_byte(SC520_GP4IMAP, SC520_IRQ_DISABLED); /* disable GPIRQ4 (ISA IRQ4) */
99 write_mmcr_byte(SC520_GP1IMAP, SC520_IRQ1); /* Set GPIRQ1 (SIO IRQ1) to IRQ1 */
100 write_mmcr_byte(SC520_GP5IMAP, SC520_IRQ5); /* Set GPIRQ5 (ISA IRQ5) to IRQ5 */
101 write_mmcr_byte(SC520_GP6IMAP, SC520_IRQ6); /* Set GPIRQ6 (ISA IRQ6) to IRQ6 */
102 write_mmcr_byte(SC520_GP7IMAP, SC520_IRQ7); /* Set GPIRQ7 (ISA IRQ7) to IRQ7 */
103 write_mmcr_byte(SC520_GP8IMAP, SC520_IRQ8); /* Set GPIRQ8 (SIO IRQ8) to IRQ8 */
104 write_mmcr_byte(SC520_GP9IMAP, SC520_IRQ9); /* Set GPIRQ9 (ISA IRQ2) to IRQ9 */
105 write_mmcr_byte(SC520_GP0IMAP, SC520_IRQ11); /* Set GPIRQ0 (ISA IRQ11) to IRQ10 */
106 write_mmcr_byte(SC520_GP2IMAP, SC520_IRQ12); /* Set GPIRQ2 (ISA IRQ12) to IRQ12 */
107 write_mmcr_byte(SC520_GP10IMAP,SC520_IRQ14); /* Set GPIRQ10 (ISA IRQ14) to IRQ14 */
109 write_mmcr_word(SC520_PCIHOSTMAP, 0x11f); /* Map PCI hostbridge INT to NMI */
110 write_mmcr_word(SC520_ECCMAP, 0x100); /* Map SDRAM ECC failure INT to NMI */
116 static void pci_sc520_cdp_fixup_irq(struct pci_controller *hose, pci_dev_t dev)
118 /* a configurable lists of irqs to steal
119 * when we need one (a board with more pci interrupt pins
120 * would use a larger table */
121 static int irq_list[] = {
127 static int next_irq_index=0;
132 pci_hose_read_config_byte(hose, dev, PCI_INTERRUPT_PIN, &tmp_pin);
135 pin-=1; /* pci config space use 1-based numbering */
137 return; /* device use no irq */
141 /* map device number + pin to a pin on the sc520 */
142 switch (PCI_DEV(dev)) {
163 pin&=3; /* wrap around */
165 if (sc520_pci_ints[pin] == -1) {
166 /* re-route one interrupt for us */
167 if (next_irq_index > 3) {
170 if (pci_sc520_set_irq(pin, irq_list[next_irq_index])) {
177 if (-1 != sc520_pci_ints[pin]) {
178 pci_hose_write_config_byte(hose, dev, PCI_INTERRUPT_LINE,
179 sc520_pci_ints[pin]);
181 PRINTF("fixup_irq: device %d pin %c irq %d\n",
182 PCI_DEV(dev), 'A' + pin, sc520_pci_ints[pin]);
185 static struct pci_controller sc520_cdp_hose = {
186 fixup_irq: pci_sc520_cdp_fixup_irq,
189 void pci_init_board(void)
191 pci_sc520_init(&sc520_cdp_hose);
195 static void silence_uart(int port)
200 void setup_ali_sio(int uart_primary)
204 ali512x_set_fdc(ALI_ENABLED, 0x3f2, 6, 0);
205 ali512x_set_pp(ALI_ENABLED, 0x278, 7, 3);
206 ali512x_set_uart(ALI_ENABLED, ALI_UART1, uart_primary?0x3f8:0x3e8, 4);
207 ali512x_set_uart(ALI_ENABLED, ALI_UART2, uart_primary?0x2f8:0x2e8, 3);
208 ali512x_set_rtc(ALI_DISABLED, 0, 0);
209 ali512x_set_kbc(ALI_ENABLED, 1, 12);
210 ali512x_set_cio(ALI_ENABLED);
213 ali512x_cio_function(12, 1, 0, 0);
214 ali512x_cio_function(13, 1, 0, 0);
216 /* SSI chip select pins */
217 ali512x_cio_function(14, 0, 0, 0); /* SSI_CS */
218 ali512x_cio_function(15, 0, 0, 0); /* SSI_MV */
219 ali512x_cio_function(16, 0, 0, 0); /* SSI_SPI# */
222 ali512x_cio_function(20, 0, 0, 1);
223 ali512x_cio_function(21, 0, 0, 1);
224 ali512x_cio_function(22, 0, 0, 1);
225 ali512x_cio_function(23, 0, 0, 1);
229 /* set up the ISA bus timing and system address mappings */
230 static void bus_init(void)
233 /* set up the GP IO pins */
234 write_mmcr_word(SC520_PIOPFS31_16, 0xf7ff); /* set the GPIO pin function 31-16 reg */
235 write_mmcr_word(SC520_PIOPFS15_0, 0xffff); /* set the GPIO pin function 15-0 reg */
236 write_mmcr_byte(SC520_CSPFS, 0xf8); /* set the CS pin function reg */
237 write_mmcr_byte(SC520_CLKSEL, 0x70);
240 write_mmcr_byte(SC520_GPCSRT, 1); /* set the GP CS offset */
241 write_mmcr_byte(SC520_GPCSPW, 3); /* set the GP CS pulse width */
242 write_mmcr_byte(SC520_GPCSOFF, 1); /* set the GP CS offset */
243 write_mmcr_byte(SC520_GPRDW, 3); /* set the RD pulse width */
244 write_mmcr_byte(SC520_GPRDOFF, 1); /* set the GP RD offset */
245 write_mmcr_byte(SC520_GPWRW, 3); /* set the GP WR pulse width */
246 write_mmcr_byte(SC520_GPWROFF, 1); /* set the GP WR offset */
248 write_mmcr_word(SC520_BOOTCSCTL, 0x1823); /* set up timing of BOOTCS */
249 write_mmcr_word(SC520_ROMCS1CTL, 0x1823); /* set up timing of ROMCS1 */
250 write_mmcr_word(SC520_ROMCS2CTL, 0x1823); /* set up timing of ROMCS2 */
252 /* adjust the memory map:
253 * by default the first 256MB (0x00000000 - 0x0fffffff) is mapped to SDRAM
254 * and 256MB to 1G-128k (0x1000000 - 0x37ffffff) is mapped to PCI mmio
255 * we need to map 1G-128k - 1G (0x38000000 - 0x3fffffff) to CS1 */
258 /* SRAM = GPCS3 128k @ d0000-effff*/
259 write_mmcr_long(SC520_PAR2, 0x4e00400d);
261 /* IDE0 = GPCS6 1f0-1f7 */
262 write_mmcr_long(SC520_PAR3, 0x380801f0);
264 /* IDE1 = GPCS7 3f6 */
265 write_mmcr_long(SC520_PAR4, 0x3c0003f6);
267 write_mmcr_long(SC520_PAR12, 0x8bffe800);
269 write_mmcr_long(SC520_PAR13, 0xcbfff000);
271 write_mmcr_long(SC520_PAR14, 0xabfff800);
273 write_mmcr_long(SC520_PAR15, 0x30000640);
275 write_mmcr_byte(SC520_ADDDECCTL, 0);
277 asm ("wbinvd\n"); /* Flush cache, req. after setting the unchached attribute ona PAR */
279 if (CFG_USE_SIO_UART) {
280 write_mmcr_byte(SC520_ADDDECCTL, read_mmcr_byte(SC520_ADDDECCTL) | UART2_DIS|UART1_DIS);
283 write_mmcr_byte(SC520_ADDDECCTL, read_mmcr_byte(SC520_ADDDECCTL) & ~(UART2_DIS|UART1_DIS));
305 * PAR1 PCI ROM mapping
319 * PAR15 Port 0x680 LED display
323 * This function should map a chunk of size bytes
324 * of the system address space to the ISA bus
326 * The function will return the memory address
327 * as seen by the host (which may very will be the
328 * same as the bus address)
330 u32 isa_map_rom(u32 bus_addr, int size)
334 PRINTF("isa_map_rom asked to map %d bytes at %x\n",
345 par |= (bus_addr>>12);
348 PRINTF ("setting PAR11 to %x\n", par);
350 /* Map rom 0x10000 with PAR1 */
351 write_mmcr_long(SC520_PAR11, par);
357 * this function removed any mapping created
358 * with pci_get_rom_window()
360 void isa_unmap_rom(u32 addr)
362 PRINTF("isa_unmap_rom asked to unmap %x", addr);
363 if ((addr>>12) == (read_mmcr_long(SC520_PAR11)&0x3ffff)) {
364 write_mmcr_long(SC520_PAR11, 0);
368 PRINTF(" not ours\n");
372 #define PCI_ROM_TEMP_SPACE 0x10000
374 * This function should map a chunk of size bytes
375 * of the system address space to the PCI bus,
376 * suitable to map PCI ROMS (bus address < 16M)
377 * the function will return the host memory address
378 * which should be converted into a bus address
379 * before used to configure the PCI rom address
382 u32 pci_get_rom_window(struct pci_controller *hose, int size)
394 par |= (PCI_ROM_TEMP_SPACE>>16);
397 PRINTF ("setting PAR1 to %x\n", par);
399 /* Map rom 0x10000 with PAR1 */
400 write_mmcr_long(SC520_PAR1, par);
402 return PCI_ROM_TEMP_SPACE;
406 * this function removed any mapping created
407 * with pci_get_rom_window()
409 void pci_remove_rom_window(struct pci_controller *hose, u32 addr)
411 PRINTF("pci_remove_rom_window: %x", addr);
412 if (addr == PCI_ROM_TEMP_SPACE) {
413 write_mmcr_long(SC520_PAR1, 0);
417 PRINTF(" not ours\n");
422 * This function is called in order to provide acces to the
423 * legacy video I/O ports on the PCI bus.
424 * After this function accesses to I/O ports 0x3b0-0x3bb and
425 * 0x3c0-0x3df shuld result in transactions on the PCI bus.
428 int pci_enable_legacy_video_ports(struct pci_controller *hose)
430 /* Map video memory to 0xa0000*/
431 write_mmcr_long(SC520_PAR0, 0x7200400a);
433 /* forward all I/O accesses to PCI */
434 write_mmcr_byte(SC520_ADDDECCTL,
435 read_mmcr_byte(SC520_ADDDECCTL) | IO_HOLE_DEST_PCI);
438 /* so we map away all io ports to pci (only way to access pci io
439 * below 0x400. But then we have to map back the portions that we dont
440 * use so that the generate cycles on the GPIO bus where the sio and
441 * ISA slots are connected, this requre the use of several PAR registers
444 /* bring 0x100 - 0x1ef back to ISA using PAR5 */
445 write_mmcr_long(SC520_PAR5, 0x30ef0100);
447 /* IDE use 1f0-1f7 */
449 /* bring 0x1f8 - 0x2f7 back to ISA using PAR6 */
450 write_mmcr_long(SC520_PAR6, 0x30ff01f8);
452 /* com2 use 2f8-2ff */
454 /* bring 0x300 - 0x3af back to ISA using PAR7 */
455 write_mmcr_long(SC520_PAR7, 0x30af0300);
457 /* vga use 3b0-3bb */
459 /* bring 0x3bc - 0x3bf back to ISA using PAR8 */
460 write_mmcr_long(SC520_PAR8, 0x300303bc);
462 /* vga use 3c0-3df */
464 /* bring 0x3e0 - 0x3f5 back to ISA using PAR9 */
465 write_mmcr_long(SC520_PAR9, 0x301503e0);
469 /* bring 0x3f7 back to ISA using PAR10 */
470 write_mmcr_long(SC520_PAR10, 0x300003f7);
472 /* com1 use 3f8-3ff */
479 * Miscelaneous platform dependent initialisations
484 DECLARE_GLOBAL_DATA_PTR;
490 /* max drive current on SDRAM */
491 write_mmcr_word(SC520_DSCTL, 0x0100);
493 /* enter debug mode after next reset (only if jumper is also set) */
494 write_mmcr_byte(SC520_RESCFG, 0x08);
495 /* configure the software timer to 33.333MHz */
496 write_mmcr_byte(SC520_SWTMRCFG, 0);
497 gd->bus_clk = 33333000;
508 void show_boot_progress(int val)
510 outb(val&0xff, 0x80);
511 outb((val&0xff00)>>8, 0x680);
515 int last_stage_init(void)
521 major |= ali512x_cio_in(23)?2:0;
522 major |= ali512x_cio_in(22)?1:0;
523 minor |= ali512x_cio_in(21)?2:0;
524 minor |= ali512x_cio_in(20)?1:0;
526 printf("AMD SC520 CDP revision %d.%d\n", major, minor);
532 void ssi_chip_select(int dev)
535 /* Spunk board: SPI EEPROM is active-low, MW EEPROM and AUX are active high */
537 case 1: /* SPI EEPROM */
538 ali512x_cio_out(16, 0);
541 case 2: /* MW EEPROM */
542 ali512x_cio_out(15, 1);
546 ali512x_cio_out(14, 1);
550 ali512x_cio_out(16, 1);
551 ali512x_cio_out(15, 0);
552 ali512x_cio_out(14, 0);
556 printf("Illegal SSI device requested: %d\n", dev);
561 void spi_init_f(void)
563 #ifdef CONFIG_SC520_CDP_USE_SPI
566 #ifdef CONFIG_SC520_CDP_USE_MW
571 ssize_t spi_read(uchar *addr, int alen, uchar *buffer, int len)
578 for (i=0;i<alen;i++) {
583 #ifdef CONFIG_SC520_CDP_USE_SPI
584 res = spi_eeprom_read(1, offset, buffer, len);
586 #ifdef CONFIG_SC520_CDP_USE_MW
587 res = mw_eeprom_read(2, offset, buffer, len);
592 ssize_t spi_write(uchar *addr, int alen, uchar *buffer, int len)
599 for (i=0;i<alen;i++) {
604 #ifdef CONFIG_SC520_CDP_USE_SPI
605 res = spi_eeprom_write(1, offset, buffer, len);
607 #ifdef CONFIG_SC520_CDP_USE_MW
608 res = mw_eeprom_write(2, offset, buffer, len);