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 DECLARE_GLOBAL_DATA_PTR;
35 #undef SC520_CDP_DEBUG
37 #ifdef SC520_CDP_DEBUG
38 #define PRINTF(fmt,args...) printf (fmt ,##args)
40 #define PRINTF(fmt,args...)
43 /* ------------------------------------------------------------------------- */
48 * We first set up all IRQs to be non-pci, edge triggered,
49 * when we later enumerate the pci bus and pci_sc520_fixup_irq() gets
50 * called we reallocate irqs to the pci bus with sc520_pci_set_irq()
51 * as needed. Whe choose the irqs to gram from a configurable list
52 * inside pci_sc520_fixup_irq() (If this list contains stupid irq's
53 * such as 0 thngas will not work)
56 static void irq_init(void)
58 /* disable global interrupt mode */
59 write_mmcr_byte(SC520_PICICR, 0x40);
61 /* set all irqs to edge */
62 write_mmcr_byte(SC520_MPICMODE, 0x00);
63 write_mmcr_byte(SC520_SL1PICMODE, 0x00);
64 write_mmcr_byte(SC520_SL2PICMODE, 0x00);
66 /* active low polarity on PIC interrupt pins,
67 * active high polarity on all other irq pins */
68 write_mmcr_word(SC520_INTPINPOL, 0x0000);
70 /* set irq number mapping */
71 write_mmcr_byte(SC520_GPTMR0MAP, SC520_IRQ_DISABLED); /* disable GP timer 0 INT */
72 write_mmcr_byte(SC520_GPTMR1MAP, SC520_IRQ_DISABLED); /* disable GP timer 1 INT */
73 write_mmcr_byte(SC520_GPTMR2MAP, SC520_IRQ_DISABLED); /* disable GP timer 2 INT */
74 write_mmcr_byte(SC520_PIT0MAP, SC520_IRQ0); /* Set PIT timer 0 INT to IRQ0 */
75 write_mmcr_byte(SC520_PIT1MAP, SC520_IRQ_DISABLED); /* disable PIT timer 1 INT */
76 write_mmcr_byte(SC520_PIT2MAP, SC520_IRQ_DISABLED); /* disable PIT timer 2 INT */
77 write_mmcr_byte(SC520_PCIINTAMAP, SC520_IRQ_DISABLED); /* disable PCI INT A */
78 write_mmcr_byte(SC520_PCIINTBMAP, SC520_IRQ_DISABLED); /* disable PCI INT B */
79 write_mmcr_byte(SC520_PCIINTCMAP, SC520_IRQ_DISABLED); /* disable PCI INT C */
80 write_mmcr_byte(SC520_PCIINTDMAP, SC520_IRQ_DISABLED); /* disable PCI INT D */
81 write_mmcr_byte(SC520_DMABCINTMAP, SC520_IRQ_DISABLED); /* disable DMA INT */
82 write_mmcr_byte(SC520_SSIMAP, SC520_IRQ_DISABLED); /* disable Synchronius serial INT */
83 write_mmcr_byte(SC520_WDTMAP, SC520_IRQ_DISABLED); /* disable Watchdog INT */
84 write_mmcr_byte(SC520_RTCMAP, SC520_IRQ8); /* Set RTC int to 8 */
85 write_mmcr_byte(SC520_WPVMAP, SC520_IRQ_DISABLED); /* disable write protect INT */
86 write_mmcr_byte(SC520_ICEMAP, SC520_IRQ1); /* Set ICE Debug Serielport INT to IRQ1 */
87 write_mmcr_byte(SC520_FERRMAP,SC520_IRQ13); /* Set FP error INT to IRQ13 */
89 if (CFG_USE_SIO_UART) {
90 write_mmcr_byte(SC520_UART1MAP, SC520_IRQ_DISABLED); /* disable internal UART1 INT */
91 write_mmcr_byte(SC520_UART2MAP, SC520_IRQ_DISABLED); /* disable internal UART2 INT */
92 write_mmcr_byte(SC520_GP3IMAP, SC520_IRQ3); /* Set GPIRQ3 (ISA IRQ3) to IRQ3 */
93 write_mmcr_byte(SC520_GP4IMAP, SC520_IRQ4); /* Set GPIRQ4 (ISA IRQ4) to IRQ4 */
95 write_mmcr_byte(SC520_UART1MAP, SC520_IRQ4); /* Set internal UART2 INT to IRQ4 */
96 write_mmcr_byte(SC520_UART2MAP, SC520_IRQ3); /* Set internal UART2 INT to IRQ3 */
97 write_mmcr_byte(SC520_GP3IMAP, SC520_IRQ_DISABLED); /* disable GPIRQ3 (ISA IRQ3) */
98 write_mmcr_byte(SC520_GP4IMAP, SC520_IRQ_DISABLED); /* disable GPIRQ4 (ISA IRQ4) */
101 write_mmcr_byte(SC520_GP1IMAP, SC520_IRQ1); /* Set GPIRQ1 (SIO IRQ1) to IRQ1 */
102 write_mmcr_byte(SC520_GP5IMAP, SC520_IRQ5); /* Set GPIRQ5 (ISA IRQ5) to IRQ5 */
103 write_mmcr_byte(SC520_GP6IMAP, SC520_IRQ6); /* Set GPIRQ6 (ISA IRQ6) to IRQ6 */
104 write_mmcr_byte(SC520_GP7IMAP, SC520_IRQ7); /* Set GPIRQ7 (ISA IRQ7) to IRQ7 */
105 write_mmcr_byte(SC520_GP8IMAP, SC520_IRQ8); /* Set GPIRQ8 (SIO IRQ8) to IRQ8 */
106 write_mmcr_byte(SC520_GP9IMAP, SC520_IRQ9); /* Set GPIRQ9 (ISA IRQ2) to IRQ9 */
107 write_mmcr_byte(SC520_GP0IMAP, SC520_IRQ11); /* Set GPIRQ0 (ISA IRQ11) to IRQ10 */
108 write_mmcr_byte(SC520_GP2IMAP, SC520_IRQ12); /* Set GPIRQ2 (ISA IRQ12) to IRQ12 */
109 write_mmcr_byte(SC520_GP10IMAP,SC520_IRQ14); /* Set GPIRQ10 (ISA IRQ14) to IRQ14 */
111 write_mmcr_word(SC520_PCIHOSTMAP, 0x11f); /* Map PCI hostbridge INT to NMI */
112 write_mmcr_word(SC520_ECCMAP, 0x100); /* Map SDRAM ECC failure INT to NMI */
118 static void pci_sc520_cdp_fixup_irq(struct pci_controller *hose, pci_dev_t dev)
120 /* a configurable lists of irqs to steal
121 * when we need one (a board with more pci interrupt pins
122 * would use a larger table */
123 static int irq_list[] = {
129 static int next_irq_index=0;
134 pci_hose_read_config_byte(hose, dev, PCI_INTERRUPT_PIN, &tmp_pin);
137 pin-=1; /* pci config space use 1-based numbering */
139 return; /* device use no irq */
143 /* map device number + pin to a pin on the sc520 */
144 switch (PCI_DEV(dev)) {
165 pin&=3; /* wrap around */
167 if (sc520_pci_ints[pin] == -1) {
168 /* re-route one interrupt for us */
169 if (next_irq_index > 3) {
172 if (pci_sc520_set_irq(pin, irq_list[next_irq_index])) {
179 if (-1 != sc520_pci_ints[pin]) {
180 pci_hose_write_config_byte(hose, dev, PCI_INTERRUPT_LINE,
181 sc520_pci_ints[pin]);
183 PRINTF("fixup_irq: device %d pin %c irq %d\n",
184 PCI_DEV(dev), 'A' + pin, sc520_pci_ints[pin]);
187 static struct pci_controller sc520_cdp_hose = {
188 fixup_irq: pci_sc520_cdp_fixup_irq,
191 void pci_init_board(void)
193 pci_sc520_init(&sc520_cdp_hose);
197 static void silence_uart(int port)
202 void setup_ali_sio(int uart_primary)
206 ali512x_set_fdc(ALI_ENABLED, 0x3f2, 6, 0);
207 ali512x_set_pp(ALI_ENABLED, 0x278, 7, 3);
208 ali512x_set_uart(ALI_ENABLED, ALI_UART1, uart_primary?0x3f8:0x3e8, 4);
209 ali512x_set_uart(ALI_ENABLED, ALI_UART2, uart_primary?0x2f8:0x2e8, 3);
210 ali512x_set_rtc(ALI_DISABLED, 0, 0);
211 ali512x_set_kbc(ALI_ENABLED, 1, 12);
212 ali512x_set_cio(ALI_ENABLED);
215 ali512x_cio_function(12, 1, 0, 0);
216 ali512x_cio_function(13, 1, 0, 0);
218 /* SSI chip select pins */
219 ali512x_cio_function(14, 0, 0, 0); /* SSI_CS */
220 ali512x_cio_function(15, 0, 0, 0); /* SSI_MV */
221 ali512x_cio_function(16, 0, 0, 0); /* SSI_SPI# */
224 ali512x_cio_function(20, 0, 0, 1);
225 ali512x_cio_function(21, 0, 0, 1);
226 ali512x_cio_function(22, 0, 0, 1);
227 ali512x_cio_function(23, 0, 0, 1);
231 /* set up the ISA bus timing and system address mappings */
232 static void bus_init(void)
235 /* set up the GP IO pins */
236 write_mmcr_word(SC520_PIOPFS31_16, 0xf7ff); /* set the GPIO pin function 31-16 reg */
237 write_mmcr_word(SC520_PIOPFS15_0, 0xffff); /* set the GPIO pin function 15-0 reg */
238 write_mmcr_byte(SC520_CSPFS, 0xf8); /* set the CS pin function reg */
239 write_mmcr_byte(SC520_CLKSEL, 0x70);
242 write_mmcr_byte(SC520_GPCSRT, 1); /* set the GP CS offset */
243 write_mmcr_byte(SC520_GPCSPW, 3); /* set the GP CS pulse width */
244 write_mmcr_byte(SC520_GPCSOFF, 1); /* set the GP CS offset */
245 write_mmcr_byte(SC520_GPRDW, 3); /* set the RD pulse width */
246 write_mmcr_byte(SC520_GPRDOFF, 1); /* set the GP RD offset */
247 write_mmcr_byte(SC520_GPWRW, 3); /* set the GP WR pulse width */
248 write_mmcr_byte(SC520_GPWROFF, 1); /* set the GP WR offset */
250 write_mmcr_word(SC520_BOOTCSCTL, 0x1823); /* set up timing of BOOTCS */
251 write_mmcr_word(SC520_ROMCS1CTL, 0x1823); /* set up timing of ROMCS1 */
252 write_mmcr_word(SC520_ROMCS2CTL, 0x1823); /* set up timing of ROMCS2 */
254 /* adjust the memory map:
255 * by default the first 256MB (0x00000000 - 0x0fffffff) is mapped to SDRAM
256 * and 256MB to 1G-128k (0x1000000 - 0x37ffffff) is mapped to PCI mmio
257 * we need to map 1G-128k - 1G (0x38000000 - 0x3fffffff) to CS1 */
260 /* SRAM = GPCS3 128k @ d0000-effff*/
261 write_mmcr_long(SC520_PAR2, 0x4e00400d);
263 /* IDE0 = GPCS6 1f0-1f7 */
264 write_mmcr_long(SC520_PAR3, 0x380801f0);
266 /* IDE1 = GPCS7 3f6 */
267 write_mmcr_long(SC520_PAR4, 0x3c0003f6);
269 write_mmcr_long(SC520_PAR12, 0x8bffe800);
271 write_mmcr_long(SC520_PAR13, 0xcbfff000);
273 write_mmcr_long(SC520_PAR14, 0xabfff800);
275 write_mmcr_long(SC520_PAR15, 0x30000640);
277 write_mmcr_byte(SC520_ADDDECCTL, 0);
279 asm ("wbinvd\n"); /* Flush cache, req. after setting the unchached attribute ona PAR */
281 if (CFG_USE_SIO_UART) {
282 write_mmcr_byte(SC520_ADDDECCTL, read_mmcr_byte(SC520_ADDDECCTL) | UART2_DIS|UART1_DIS);
285 write_mmcr_byte(SC520_ADDDECCTL, read_mmcr_byte(SC520_ADDDECCTL) & ~(UART2_DIS|UART1_DIS));
307 * PAR1 PCI ROM mapping
321 * PAR15 Port 0x680 LED display
325 * This function should map a chunk of size bytes
326 * of the system address space to the ISA bus
328 * The function will return the memory address
329 * as seen by the host (which may very will be the
330 * same as the bus address)
332 u32 isa_map_rom(u32 bus_addr, int size)
336 PRINTF("isa_map_rom asked to map %d bytes at %x\n",
347 par |= (bus_addr>>12);
350 PRINTF ("setting PAR11 to %x\n", par);
352 /* Map rom 0x10000 with PAR1 */
353 write_mmcr_long(SC520_PAR11, par);
359 * this function removed any mapping created
360 * with pci_get_rom_window()
362 void isa_unmap_rom(u32 addr)
364 PRINTF("isa_unmap_rom asked to unmap %x", addr);
365 if ((addr>>12) == (read_mmcr_long(SC520_PAR11)&0x3ffff)) {
366 write_mmcr_long(SC520_PAR11, 0);
370 PRINTF(" not ours\n");
374 #define PCI_ROM_TEMP_SPACE 0x10000
376 * This function should map a chunk of size bytes
377 * of the system address space to the PCI bus,
378 * suitable to map PCI ROMS (bus address < 16M)
379 * the function will return the host memory address
380 * which should be converted into a bus address
381 * before used to configure the PCI rom address
384 u32 pci_get_rom_window(struct pci_controller *hose, int size)
396 par |= (PCI_ROM_TEMP_SPACE>>16);
399 PRINTF ("setting PAR1 to %x\n", par);
401 /* Map rom 0x10000 with PAR1 */
402 write_mmcr_long(SC520_PAR1, par);
404 return PCI_ROM_TEMP_SPACE;
408 * this function removed any mapping created
409 * with pci_get_rom_window()
411 void pci_remove_rom_window(struct pci_controller *hose, u32 addr)
413 PRINTF("pci_remove_rom_window: %x", addr);
414 if (addr == PCI_ROM_TEMP_SPACE) {
415 write_mmcr_long(SC520_PAR1, 0);
419 PRINTF(" not ours\n");
424 * This function is called in order to provide acces to the
425 * legacy video I/O ports on the PCI bus.
426 * After this function accesses to I/O ports 0x3b0-0x3bb and
427 * 0x3c0-0x3df shuld result in transactions on the PCI bus.
430 int pci_enable_legacy_video_ports(struct pci_controller *hose)
432 /* Map video memory to 0xa0000*/
433 write_mmcr_long(SC520_PAR0, 0x7200400a);
435 /* forward all I/O accesses to PCI */
436 write_mmcr_byte(SC520_ADDDECCTL,
437 read_mmcr_byte(SC520_ADDDECCTL) | IO_HOLE_DEST_PCI);
440 /* so we map away all io ports to pci (only way to access pci io
441 * below 0x400. But then we have to map back the portions that we dont
442 * use so that the generate cycles on the GPIO bus where the sio and
443 * ISA slots are connected, this requre the use of several PAR registers
446 /* bring 0x100 - 0x1ef back to ISA using PAR5 */
447 write_mmcr_long(SC520_PAR5, 0x30ef0100);
449 /* IDE use 1f0-1f7 */
451 /* bring 0x1f8 - 0x2f7 back to ISA using PAR6 */
452 write_mmcr_long(SC520_PAR6, 0x30ff01f8);
454 /* com2 use 2f8-2ff */
456 /* bring 0x300 - 0x3af back to ISA using PAR7 */
457 write_mmcr_long(SC520_PAR7, 0x30af0300);
459 /* vga use 3b0-3bb */
461 /* bring 0x3bc - 0x3bf back to ISA using PAR8 */
462 write_mmcr_long(SC520_PAR8, 0x300303bc);
464 /* vga use 3c0-3df */
466 /* bring 0x3e0 - 0x3f5 back to ISA using PAR9 */
467 write_mmcr_long(SC520_PAR9, 0x301503e0);
471 /* bring 0x3f7 back to ISA using PAR10 */
472 write_mmcr_long(SC520_PAR10, 0x300003f7);
474 /* com1 use 3f8-3ff */
481 * Miscelaneous platform dependent initialisations
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 if (val < -32) val = -1; /* let things compatible */
511 outb(val&0xff, 0x80);
512 outb((val&0xff00)>>8, 0x680);
516 int last_stage_init(void)
522 major |= ali512x_cio_in(23)?2:0;
523 major |= ali512x_cio_in(22)?1:0;
524 minor |= ali512x_cio_in(21)?2:0;
525 minor |= ali512x_cio_in(20)?1:0;
527 printf("AMD SC520 CDP revision %d.%d\n", major, minor);
533 void ssi_chip_select(int dev)
536 /* Spunk board: SPI EEPROM is active-low, MW EEPROM and AUX are active high */
538 case 1: /* SPI EEPROM */
539 ali512x_cio_out(16, 0);
542 case 2: /* MW EEPROM */
543 ali512x_cio_out(15, 1);
547 ali512x_cio_out(14, 1);
551 ali512x_cio_out(16, 1);
552 ali512x_cio_out(15, 0);
553 ali512x_cio_out(14, 0);
557 printf("Illegal SSI device requested: %d\n", dev);
561 void spi_eeprom_probe(int x)
565 int spi_eeprom_read(int x, int offset, char *buffer, int len)
570 int spi_eeprom_write(int x, int offset, char *buffer, int len)
575 void spi_init_f(void)
577 #ifdef CONFIG_SC520_CDP_USE_SPI
580 #ifdef CONFIG_SC520_CDP_USE_MW
585 ssize_t spi_read(uchar *addr, int alen, uchar *buffer, int len)
592 for (i=0;i<alen;i++) {
597 #ifdef CONFIG_SC520_CDP_USE_SPI
598 res = spi_eeprom_read(1, offset, buffer, len);
600 #ifdef CONFIG_SC520_CDP_USE_MW
601 res = mw_eeprom_read(2, offset, buffer, len);
603 #if !defined(CONFIG_SC520_CDP_USE_SPI) && !defined(CONFIG_SC520_CDP_USE_MW)
609 ssize_t spi_write(uchar *addr, int alen, uchar *buffer, int len)
616 for (i=0;i<alen;i++) {
621 #ifdef CONFIG_SC520_CDP_USE_SPI
622 res = spi_eeprom_write(1, offset, buffer, len);
624 #ifdef CONFIG_SC520_CDP_USE_MW
625 res = mw_eeprom_write(2, offset, buffer, len);
627 #if !defined(CONFIG_SC520_CDP_USE_SPI) && !defined(CONFIG_SC520_CDP_USE_MW)