2 * Board setup routines for the Motorola SPS Sandpoint Test Platform.
4 * Author: Mark A. Greer
7 * 2000-2003 (c) MontaVista Software, Inc. This file is licensed under
8 * the terms of the GNU General Public License version 2. This program
9 * is licensed "as is" without any warranty of any kind, whether express
14 * This file adds support for the Motorola SPS Sandpoint Test Platform.
15 * These boards have a PPMC slot for the processor so any combination
16 * of cpu and host bridge can be attached. This port is for an 8240 PPMC
17 * module from Motorola SPS and other closely related cpu/host bridge
18 * combinations (e.g., 750/755/7400 with MPC107 host bridge).
19 * The sandpoint itself has a Windbond 83c553 (PCI-ISA bridge, 2 DMA ctlrs, 2
20 * cascaded 8259 interrupt ctlrs, 8254 Timer/Counter, and an IDE ctlr), a
21 * National 87308 (RTC, 2 UARTs, Keyboard & mouse ctlrs, and a floppy ctlr),
22 * and 4 PCI slots (only 2 of which are usable; the other 2 are keyed for 3.3V
25 * The firmware on the sandpoint is called DINK (not my acronym :). This port
26 * depends on DINK to do some basic initialization (e.g., initialize the memory
27 * ctlr) and to ensure that the processor is using MAP B (CHRP map).
29 * The switch settings for the Sandpoint board MUST be as follows:
35 * 'down' is in the direction from the PCI slots towards the PPMC slot;
36 * 'up' is in the direction from the PPMC slot towards the PCI slots.
37 * Be careful, the way the sandpoint board is installed in XT chasses will
38 * make the directions reversed.
40 * Since Motorola listened to our suggestions for improvement, we now have
41 * the Sandpoint X3 board. All of the PCI slots are available, it uses
42 * the serial interrupt interface (just a hardware thing we need to
43 * configure properly).
45 * Use the default X3 switch settings. The interrupts are then:
47 * 0 SIOINT (8259, active low)
52 * 7 Winbond INTC (IDE interrupt)
53 * 8 Winbond INTD (IDE interrupt)
56 * Motorola has finally released a version of DINK32 that correctly
57 * (seemingly) initalizes the memory controller correctly, regardless
58 * of the amount of memory in the system. Once a method of determining
59 * what version of DINK initializes the system for us, if applicable, is
60 * found, we can hopefully stop hardcoding 32MB of RAM.
63 #include <linux/config.h>
64 #include <linux/stddef.h>
65 #include <linux/kernel.h>
66 #include <linux/init.h>
67 #include <linux/errno.h>
68 #include <linux/reboot.h>
69 #include <linux/pci.h>
70 #include <linux/kdev_t.h>
71 #include <linux/major.h>
72 #include <linux/initrd.h>
73 #include <linux/console.h>
74 #include <linux/delay.h>
75 #include <linux/ide.h>
76 #include <linux/seq_file.h>
77 #include <linux/root_dev.h>
78 #include <linux/serial.h>
79 #include <linux/tty.h> /* for linux/serial_core.h */
80 #include <linux/serial_core.h>
81 #include <linux/serial_8250.h>
83 #include <asm/system.h>
84 #include <asm/pgtable.h>
89 #include <asm/machdep.h>
93 #include <asm/open_pic.h>
94 #include <asm/i8259.h>
96 #include <asm/bootinfo.h>
97 #include <asm/mpc10x.h>
98 #include <asm/pci-bridge.h>
100 #include <asm/ppc_sys.h>
102 #include "sandpoint.h"
104 /* Set non-zero if an X2 Sandpoint detected. */
105 static int sandpoint_is_x2;
107 unsigned char __res[sizeof(bd_t)];
109 static void sandpoint_halt(void);
110 static void sandpoint_probe_type(void);
113 * Define all of the IRQ senses and polarities. Taken from the
114 * Sandpoint X3 User's manual.
116 static u_char sandpoint_openpic_initsenses[] __initdata = {
117 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* 0: SIOINT */
118 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* 2: PCI Slot 1 */
119 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* 3: PCI Slot 2 */
120 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* 4: PCI Slot 3 */
121 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* 5: PCI Slot 4 */
122 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* 8: IDE (INT C) */
123 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE) /* 9: IDE (INT D) */
127 * Motorola SPS Sandpoint interrupt routing.
130 x3_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
132 static char pci_irq_table[][4] =
134 * PCI IDSEL/INTPIN->INTLINE
138 { 16, 0, 0, 0 }, /* IDSEL 11 - i8259 on Winbond */
139 { 0, 0, 0, 0 }, /* IDSEL 12 - unused */
140 { 18, 21, 20, 19 }, /* IDSEL 13 - PCI slot 1 */
141 { 19, 18, 21, 20 }, /* IDSEL 14 - PCI slot 2 */
142 { 20, 19, 18, 21 }, /* IDSEL 15 - PCI slot 3 */
143 { 21, 20, 19, 18 }, /* IDSEL 16 - PCI slot 4 */
146 const long min_idsel = 11, max_idsel = 16, irqs_per_slot = 4;
147 return PCI_IRQ_TABLE_LOOKUP;
151 x2_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
153 static char pci_irq_table[][4] =
155 * PCI IDSEL/INTPIN->INTLINE
159 { 18, 0, 0, 0 }, /* IDSEL 11 - i8259 on Windbond */
160 { 0, 0, 0, 0 }, /* IDSEL 12 - unused */
161 { 16, 17, 18, 19 }, /* IDSEL 13 - PCI slot 1 */
162 { 17, 18, 19, 16 }, /* IDSEL 14 - PCI slot 2 */
163 { 18, 19, 16, 17 }, /* IDSEL 15 - PCI slot 3 */
164 { 19, 16, 17, 18 }, /* IDSEL 16 - PCI slot 4 */
167 const long min_idsel = 11, max_idsel = 16, irqs_per_slot = 4;
168 return PCI_IRQ_TABLE_LOOKUP;
172 sandpoint_setup_winbond_83553(struct pci_controller *hose)
177 * Route IDE interrupts directly to the 8259's IRQ 14 & 15.
178 * We can't route the IDE interrupt to PCI INTC# or INTD# because those
179 * woule interfere with the PMC's INTC# and INTD# lines.
184 devfn = PCI_DEVFN(11,0);
186 early_write_config_byte(hose,
189 0x43, /* IDE Interrupt Routing Control */
191 early_write_config_word(hose,
194 0x44, /* PCI Interrupt Routing Control */
197 /* Want ISA memory cycles to be forwarded to PCI bus */
198 early_write_config_byte(hose,
201 0x48, /* ISA-to-PCI Addr Decoder Control */
204 /* Enable Port 92. */
205 early_write_config_byte(hose,
208 0x4e, /* AT System Control Register */
213 devfn = PCI_DEVFN(11,1);
215 /* Put IDE controller into native mode. */
216 early_write_config_byte(hose,
219 0x09, /* Programming interface Register */
222 /* Init IRQ routing, enable both ports, disable fast 16 */
223 early_write_config_dword(hose,
226 0x40, /* IDE Control/Status Register */
231 /* On the sandpoint X2, we must avoid sending configuration cycles to
232 * device #12 (IDSEL addr = AD12).
235 x2_exclude_device(u_char bus, u_char devfn)
237 if ((bus == 0) && (PCI_SLOT(devfn) == SANDPOINT_HOST_BRIDGE_IDSEL))
238 return PCIBIOS_DEVICE_NOT_FOUND;
240 return PCIBIOS_SUCCESSFUL;
244 sandpoint_find_bridges(void)
246 struct pci_controller *hose;
248 hose = pcibios_alloc_controller();
253 hose->first_busno = 0;
254 hose->last_busno = 0xff;
256 if (mpc10x_bridge_init(hose,
259 MPC10X_MAPB_EUMB_BASE) == 0) {
261 /* Do early winbond init, then scan PCI bus */
262 sandpoint_setup_winbond_83553(hose);
263 hose->last_busno = pciauto_bus_scan(hose, hose->first_busno);
265 ppc_md.pcibios_fixup = NULL;
266 ppc_md.pcibios_fixup_bus = NULL;
267 ppc_md.pci_swizzle = common_swizzle;
268 if (sandpoint_is_x2) {
269 ppc_md.pci_map_irq = x2_map_irq;
270 ppc_md.pci_exclude_device = x2_exclude_device;
272 ppc_md.pci_map_irq = x3_map_irq;
276 ppc_md.progress("Bridge init failed", 0x100);
277 printk("Host bridge init failed\n");
284 sandpoint_setup_arch(void)
286 /* Probe for Sandpoint model */
287 sandpoint_probe_type();
289 epic_serial_mode = 0;
291 loops_per_jiffy = 100000000 / HZ;
293 #ifdef CONFIG_BLK_DEV_INITRD
295 ROOT_DEV = Root_RAM0;
298 #ifdef CONFIG_ROOT_NFS
301 ROOT_DEV = Root_HDA1;
304 /* Lookup PCI host bridges */
305 sandpoint_find_bridges();
307 if (strncmp (cur_ppc_sys_spec->ppc_sys_name, "8245", 4) == 0)
309 bd_t *bp = (bd_t *)__res;
310 struct plat_serial8250_port *pdata;
312 pdata = (struct plat_serial8250_port *) ppc_sys_get_pdata(MPC10X_UART0);
315 pdata[0].uartclk = bp->bi_busfreq;
318 #ifdef CONFIG_SANDPOINT_ENABLE_UART1
319 pdata = (struct plat_serial8250_port *) ppc_sys_get_pdata(MPC10X_UART1);
322 pdata[0].uartclk = bp->bi_busfreq;
325 ppc_sys_device_remove(MPC10X_UART1);
329 printk(KERN_INFO "Motorola SPS Sandpoint Test Platform\n");
330 printk(KERN_INFO "Port by MontaVista Software, Inc. (source@mvista.com)\n");
332 /* DINK32 12.3 and below do not correctly enable any caches.
333 * We will do this now with good known values. Future versions
334 * of DINK32 are supposed to get this correct.
336 if (cpu_has_feature(CPU_FTR_SPEC7450))
337 /* 745x is different. We only want to pass along enable. */
339 else if (cpu_has_feature(CPU_FTR_L2CR))
340 /* All modules have 1MB of L2. We also assume that an
341 * L2 divisor of 3 will work.
343 _set_L2CR(L2CR_L2E | L2CR_L2SIZ_1MB | L2CR_L2CLK_DIV3
344 | L2CR_L2RAM_PIPE | L2CR_L2OH_1_0 | L2CR_L2DF);
346 /* Untested right now. */
347 if (cpu_has_feature(CPU_FTR_L3CR)) {
349 _set_L3CR(0x8f032000);
354 #define SANDPOINT_87308_CFG_ADDR 0x15c
355 #define SANDPOINT_87308_CFG_DATA 0x15d
357 #define SANDPOINT_87308_CFG_INB(addr, byte) { \
358 outb((addr), SANDPOINT_87308_CFG_ADDR); \
359 (byte) = inb(SANDPOINT_87308_CFG_DATA); \
362 #define SANDPOINT_87308_CFG_OUTB(addr, byte) { \
363 outb((addr), SANDPOINT_87308_CFG_ADDR); \
364 outb((byte), SANDPOINT_87308_CFG_DATA); \
367 #define SANDPOINT_87308_SELECT_DEV(dev_num) { \
368 SANDPOINT_87308_CFG_OUTB(0x07, (dev_num)); \
371 #define SANDPOINT_87308_DEV_ENABLE(dev_num) { \
372 SANDPOINT_87308_SELECT_DEV(dev_num); \
373 SANDPOINT_87308_CFG_OUTB(0x30, 0x01); \
377 * To probe the Sandpoint type, we need to check for a connection between GPIO
378 * pins 6 and 7 on the NS87308 SuperIO.
380 static void __init sandpoint_probe_type(void)
383 /* First, ensure that the GPIO pins are enabled. */
384 SANDPOINT_87308_SELECT_DEV(0x07); /* Select GPIO logical device */
385 SANDPOINT_87308_CFG_OUTB(0x60, 0x07); /* Base address 0x700 */
386 SANDPOINT_87308_CFG_OUTB(0x61, 0x00);
387 SANDPOINT_87308_CFG_OUTB(0x30, 0x01); /* Enable */
389 /* Now, set pin 7 to output and pin 6 to input. */
390 outb((inb(0x701) | 0x80) & 0xbf, 0x701);
391 /* Set push-pull output */
392 outb(inb(0x702) | 0x80, 0x702);
393 /* Set pull-up on input */
394 outb(inb(0x703) | 0x40, 0x703);
395 /* Set output high and check */
397 outb(x | 0x80, 0x700);
399 sandpoint_is_x2 = ! (x & 0x40);
400 if (ppc_md.progress && sandpoint_is_x2)
401 ppc_md.progress("High output says X2", 0);
402 /* Set output low and check */
403 outb(x & 0x7f, 0x700);
404 sandpoint_is_x2 |= inb(0x700) & 0x40;
405 if (ppc_md.progress && sandpoint_is_x2)
406 ppc_md.progress("Low output says X2", 0);
407 if (ppc_md.progress && ! sandpoint_is_x2)
408 ppc_md.progress("Sandpoint is X3", 0);
412 * Fix IDE interrupts.
415 sandpoint_fix_winbond_83553(void)
417 /* Make some 8259 interrupt level sensitive */
424 arch_initcall(sandpoint_fix_winbond_83553);
427 * Initialize the ISA devices on the Nat'l PC87308VUL SuperIO chip.
430 sandpoint_setup_natl_87308(void)
435 * Enable all the devices on the Super I/O chip.
437 SANDPOINT_87308_SELECT_DEV(0x00); /* Select kbd logical device */
438 SANDPOINT_87308_CFG_OUTB(0xf0, 0x00); /* Set KBC clock to 8 Mhz */
439 SANDPOINT_87308_DEV_ENABLE(0x00); /* Enable keyboard */
440 SANDPOINT_87308_DEV_ENABLE(0x01); /* Enable mouse */
441 SANDPOINT_87308_DEV_ENABLE(0x02); /* Enable rtc */
442 SANDPOINT_87308_DEV_ENABLE(0x03); /* Enable fdc (floppy) */
443 SANDPOINT_87308_DEV_ENABLE(0x04); /* Enable parallel */
444 SANDPOINT_87308_DEV_ENABLE(0x05); /* Enable UART 2 */
445 SANDPOINT_87308_CFG_OUTB(0xf0, 0x82); /* Enable bank select regs */
446 SANDPOINT_87308_DEV_ENABLE(0x06); /* Enable UART 1 */
447 SANDPOINT_87308_CFG_OUTB(0xf0, 0x82); /* Enable bank select regs */
449 /* Set up floppy in PS/2 mode */
450 outb(0x09, SIO_CONFIG_RA);
451 reg = inb(SIO_CONFIG_RD);
452 reg = (reg & 0x3F) | 0x40;
453 outb(reg, SIO_CONFIG_RD);
454 outb(reg, SIO_CONFIG_RD); /* Have to write twice to change! */
459 arch_initcall(sandpoint_setup_natl_87308);
462 sandpoint_request_io(void)
464 request_region(0x00,0x20,"dma1");
465 request_region(0x20,0x20,"pic1");
466 request_region(0x40,0x20,"timer");
467 request_region(0x80,0x10,"dma page reg");
468 request_region(0xa0,0x20,"pic2");
469 request_region(0xc0,0x20,"dma2");
474 arch_initcall(sandpoint_request_io);
477 * Interrupt setup and service. Interrrupts on the Sandpoint come
478 * from the four PCI slots plus the 8259 in the Winbond Super I/O (SIO).
479 * The 8259 is cascaded from EPIC IRQ0, IRQ1-4 map to PCI slots 1-4,
480 * IDE is on EPIC 7 and 8.
483 sandpoint_init_IRQ(void)
487 OpenPIC_InitSenses = sandpoint_openpic_initsenses;
488 OpenPIC_NumInitSenses = sizeof(sandpoint_openpic_initsenses);
490 mpc10x_set_openpic();
491 openpic_hookup_cascade(sandpoint_is_x2 ? 17 : NUM_8259_INTERRUPTS, "82c59 cascade",
495 * The EPIC allows for a read in the range of 0xFEF00000 ->
496 * 0xFEFFFFFF to generate a PCI interrupt-acknowledge transaction.
498 i8259_init(0xfef00000, 0);
501 static unsigned long __init
502 sandpoint_find_end_of_memory(void)
504 bd_t *bp = (bd_t *)__res;
507 return bp->bi_memsize;
509 /* DINK32 13.0 correctly initalizes things, so iff you use
510 * this you _should_ be able to change this instead of a
511 * hardcoded value. */
513 return mpc10x_get_mem_size(MPC10X_MEM_MAP_B);
520 sandpoint_map_io(void)
522 io_block_mapping(0xfe000000, 0xfe000000, 0x02000000, _PAGE_IO);
526 sandpoint_restart(char *cmd)
530 /* Set exception prefix high - to the firmware */
531 _nmask_and_or_msr(0, MSR_IP);
533 /* Reset system via Port 92 */
536 for(;;); /* Spin until reset happens */
540 sandpoint_power_off(void)
543 for(;;); /* No way to shut power off with software */
550 sandpoint_power_off();
555 sandpoint_show_cpuinfo(struct seq_file *m)
557 seq_printf(m, "vendor\t\t: Motorola SPS\n");
558 seq_printf(m, "machine\t\t: Sandpoint\n");
563 #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
567 static int sandpoint_ide_ports_known = 0;
568 static unsigned long sandpoint_ide_regbase[MAX_HWIFS];
569 static unsigned long sandpoint_ide_ctl_regbase[MAX_HWIFS];
570 static unsigned long sandpoint_idedma_regbase;
573 sandpoint_ide_probe(void)
575 struct pci_dev *pdev = pci_get_device(PCI_VENDOR_ID_WINBOND,
576 PCI_DEVICE_ID_WINBOND_82C105, NULL);
579 sandpoint_ide_regbase[0]=pdev->resource[0].start;
580 sandpoint_ide_regbase[1]=pdev->resource[2].start;
581 sandpoint_ide_ctl_regbase[0]=pdev->resource[1].start;
582 sandpoint_ide_ctl_regbase[1]=pdev->resource[3].start;
583 sandpoint_idedma_regbase=pdev->resource[4].start;
587 sandpoint_ide_ports_known = 1;
591 sandpoint_ide_default_irq(unsigned long base)
593 if (sandpoint_ide_ports_known == 0)
594 sandpoint_ide_probe();
596 if (base == sandpoint_ide_regbase[0])
597 return SANDPOINT_IDE_INT0;
598 else if (base == sandpoint_ide_regbase[1])
599 return SANDPOINT_IDE_INT1;
605 sandpoint_ide_default_io_base(int index)
607 if (sandpoint_ide_ports_known == 0)
608 sandpoint_ide_probe();
610 return sandpoint_ide_regbase[index];
614 sandpoint_ide_init_hwif_ports(hw_regs_t *hw, unsigned long data_port,
615 unsigned long ctrl_port, int *irq)
617 unsigned long reg = data_port;
618 uint alt_status_base;
621 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
622 hw->io_ports[i] = reg++;
625 if (data_port == sandpoint_ide_regbase[0]) {
626 alt_status_base = sandpoint_ide_ctl_regbase[0] + 2;
629 else if (data_port == sandpoint_ide_regbase[1]) {
630 alt_status_base = sandpoint_ide_ctl_regbase[1] + 2;
639 hw->io_ports[IDE_CONTROL_OFFSET] = ctrl_port;
641 hw->io_ports[IDE_CONTROL_OFFSET] = alt_status_base;
651 * Set BAT 3 to map 0xf8000000 to end of physical memory space 1-to-1.
653 static __inline__ void
654 sandpoint_set_bat(void)
656 unsigned long bat3u, bat3l;
658 __asm__ __volatile__(
666 : "=r" (bat3u), "=r" (bat3l));
672 platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
673 unsigned long r6, unsigned long r7)
675 parse_bootinfo(find_bootinfo());
677 /* ASSUMPTION: If both r3 (bd_t pointer) and r6 (cmdline pointer)
678 * are non-zero, then we should use the board info from the bd_t
679 * structure and the cmdline pointed to by r6 instead of the
680 * information from birecs, if any. Otherwise, use the information
681 * from birecs as discovered by the preceeding call to
682 * parse_bootinfo(). This rule should work with both PPCBoot, which
683 * uses a bd_t board info structure, and the kernel boot wrapper,
687 /* copy board info structure */
688 memcpy( (void *)__res,(void *)(r3+KERNELBASE), sizeof(bd_t) );
689 /* copy command line */
690 *(char *)(r7+KERNELBASE) = 0;
691 strcpy(cmd_line, (char *)(r6+KERNELBASE));
694 #ifdef CONFIG_BLK_DEV_INITRD
695 /* take care of initrd if we have one */
697 initrd_start = r4 + KERNELBASE;
698 initrd_end = r5 + KERNELBASE;
700 #endif /* CONFIG_BLK_DEV_INITRD */
702 /* Map in board regs, etc. */
705 isa_io_base = MPC10X_MAPB_ISA_IO_BASE;
706 isa_mem_base = MPC10X_MAPB_ISA_MEM_BASE;
707 pci_dram_offset = MPC10X_MAPB_DRAM_OFFSET;
708 ISA_DMA_THRESHOLD = 0x00ffffff;
709 DMA_MODE_READ = 0x44;
710 DMA_MODE_WRITE = 0x48;
711 ppc_do_canonicalize_irqs = 1;
713 ppc_md.setup_arch = sandpoint_setup_arch;
714 ppc_md.show_cpuinfo = sandpoint_show_cpuinfo;
715 ppc_md.init_IRQ = sandpoint_init_IRQ;
716 ppc_md.get_irq = openpic_get_irq;
718 ppc_md.restart = sandpoint_restart;
719 ppc_md.power_off = sandpoint_power_off;
720 ppc_md.halt = sandpoint_halt;
722 ppc_md.find_end_of_memory = sandpoint_find_end_of_memory;
723 ppc_md.setup_io_mappings = sandpoint_map_io;
725 TODC_INIT(TODC_TYPE_PC97307, 0x70, 0x00, 0x71, 8);
726 ppc_md.time_init = todc_time_init;
727 ppc_md.set_rtc_time = todc_set_rtc_time;
728 ppc_md.get_rtc_time = todc_get_rtc_time;
729 ppc_md.calibrate_decr = todc_calibrate_decr;
731 ppc_md.nvram_read_val = todc_mc146818_read_val;
732 ppc_md.nvram_write_val = todc_mc146818_write_val;
735 ppc_md.kgdb_map_scc = gen550_kgdb_map_scc;
737 #ifdef CONFIG_SERIAL_TEXT_DEBUG
738 ppc_md.progress = gen550_progress;
741 #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
742 ppc_ide_md.default_irq = sandpoint_ide_default_irq;
743 ppc_ide_md.default_io_base = sandpoint_ide_default_io_base;
744 ppc_ide_md.ide_init_hwif = sandpoint_ide_init_hwif_ports;