2 * arch/ppc/platforms/ebony.c
4 * Ebony board specific routines
6 * Matt Porter <mporter@mvista.com>
8 * Copyright 2002 MontaVista Software Inc.
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2 of the License, or (at your
13 * option) any later version.
16 #include <linux/config.h>
17 #include <linux/stddef.h>
18 #include <linux/kernel.h>
19 #include <linux/init.h>
20 #include <linux/errno.h>
21 #include <linux/reboot.h>
22 #include <linux/pci.h>
23 #include <linux/kdev_t.h>
24 #include <linux/types.h>
25 #include <linux/major.h>
26 #include <linux/blkdev.h>
27 #include <linux/console.h>
28 #include <linux/delay.h>
29 #include <linux/ide.h>
30 #include <linux/initrd.h>
31 #include <linux/irq.h>
32 #include <linux/seq_file.h>
33 #include <linux/root_dev.h>
34 #include <linux/tty.h>
35 #include <linux/serial.h>
36 #include <linux/serial_core.h>
38 #include <asm/system.h>
39 #include <asm/pgtable.h>
43 #include <asm/machdep.h>
45 #include <asm/pci-bridge.h>
48 #include <asm/bootinfo.h>
49 #include <asm/ppc4xx_pic.h>
52 * Ebony IRQ triggering/polarity settings
54 static u_char ebony_IRQ_initsenses[] __initdata = {
55 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 0: UART 0 */
56 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 1: UART 1 */
57 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 2: IIC 0 */
58 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 3: IIC 1 */
59 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 4: PCI Inb Mess */
60 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 5: PCI Cmd Wrt */
61 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 6: PCI PM */
62 (IRQ_SENSE_EDGE | IRQ_POLARITY_POSITIVE), /* 7: PCI MSI 0 */
63 (IRQ_SENSE_EDGE | IRQ_POLARITY_POSITIVE), /* 8: PCI MSI 1 */
64 (IRQ_SENSE_EDGE | IRQ_POLARITY_POSITIVE), /* 9: PCI MSI 2 */
65 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 10: MAL TX EOB */
66 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 11: MAL RX EOB */
67 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 12: DMA Chan 0 */
68 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 13: DMA Chan 1 */
69 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 14: DMA Chan 2 */
70 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 15: DMA Chan 3 */
71 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 16: Reserved */
72 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 17: Reserved */
73 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 18: GPT Timer 0 */
74 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 19: GPT Timer 1 */
75 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 20: GPT Timer 2 */
76 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 21: GPT Timer 3 */
77 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 22: GPT Timer 4 */
78 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* 23: Ext Int 0 */
79 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* 24: Ext Int 1 */
80 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* 25: Ext Int 2 */
81 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* 26: Ext Int 3 */
82 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 27: Ext Int 4 */
83 (IRQ_SENSE_EDGE | IRQ_POLARITY_NEGATIVE), /* 28: Ext Int 5 */
84 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* 29: Ext Int 6 */
85 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 30: UIC1 NC Int */
86 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 31: UIC1 Crit Int */
87 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 32: MAL SERR */
88 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 33: MAL TXDE */
89 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 34: MAL RXDE */
90 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 35: ECC Unc Err */
91 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 36: ECC Corr Err */
92 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 37: Ext Bus Ctrl */
93 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 38: Ext Bus Mstr */
94 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 39: OPB->PLB */
95 (IRQ_SENSE_EDGE | IRQ_POLARITY_POSITIVE), /* 40: PCI MSI 3 */
96 (IRQ_SENSE_EDGE | IRQ_POLARITY_POSITIVE), /* 41: PCI MSI 4 */
97 (IRQ_SENSE_EDGE | IRQ_POLARITY_POSITIVE), /* 42: PCI MSI 5 */
98 (IRQ_SENSE_EDGE | IRQ_POLARITY_POSITIVE), /* 43: PCI MSI 6 */
99 (IRQ_SENSE_EDGE | IRQ_POLARITY_POSITIVE), /* 44: PCI MSI 7 */
100 (IRQ_SENSE_EDGE | IRQ_POLARITY_POSITIVE), /* 45: PCI MSI 8 */
101 (IRQ_SENSE_EDGE | IRQ_POLARITY_POSITIVE), /* 46: PCI MSI 9 */
102 (IRQ_SENSE_EDGE | IRQ_POLARITY_POSITIVE), /* 47: PCI MSI 10 */
103 (IRQ_SENSE_EDGE | IRQ_POLARITY_POSITIVE), /* 48: PCI MSI 11 */
104 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 49: PLB Perf Mon */
105 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 50: Ext Int 7 */
106 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* 51: Ext Int 8 */
107 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* 52: Ext Int 9 */
108 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* 53: Ext Int 10 */
109 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* 54: Ext Int 11 */
110 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* 55: Ext Int 12 */
111 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 56: Ser ROM Err */
112 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 57: Reserved */
113 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 58: Reserved */
114 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 59: PCI Async Err */
115 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 60: EMAC 0 */
116 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 61: EMAC 0 WOL */
117 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 62: EMAC 1 */
118 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* 63: EMAC 1 WOL */
121 extern void abort(void);
124 ebony_calibrate_decr(void)
129 * Determine system clock speed
131 * If we are on Rev. B silicon, then use
132 * default external system clock. If we are
133 * on Rev. C silicon then errata forces us to
134 * use the internal clock.
136 switch (PVR_REV(mfspr(PVR))) {
137 case PVR_REV(PVR_440GP_RB):
138 freq = EBONY_440GP_RB_SYSCLK;
140 case PVR_REV(PVR_440GP_RC1):
142 freq = EBONY_440GP_RC_SYSCLK;
146 tb_ticks_per_jiffy = freq / HZ;
147 tb_to_us = mulhwu_scale_factor(freq, 1000000);
149 /* Set the time base to zero */
153 /* Clear any pending timer interrupts */
154 mtspr(SPRN_TSR, TSR_ENW | TSR_WIS | TSR_DIS | TSR_FIS);
156 /* Enable decrementer interrupt */
157 mtspr(SPRN_TCR, TCR_DIE);
161 ebony_show_cpuinfo(struct seq_file *m)
163 seq_printf(m, "vendor\t\t: IBM\n");
164 seq_printf(m, "machine\t\t: Ebony\n");
170 ebony_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
172 static char pci_irq_table[][4] =
174 * PCI IDSEL/INTPIN->INTLINE
178 { 23, 23, 23, 23 }, /* IDSEL 1 - PCI Slot 0 */
179 { 24, 24, 24, 24 }, /* IDSEL 2 - PCI Slot 1 */
180 { 25, 25, 25, 25 }, /* IDSEL 3 - PCI Slot 2 */
181 { 26, 26, 26, 26 }, /* IDSEL 4 - PCI Slot 3 */
184 const long min_idsel = 1, max_idsel = 4, irqs_per_slot = 4;
185 return PCI_IRQ_TABLE_LOOKUP;
188 #define PCIX_WRITEL(value, offset) \
189 (writel(value, (u32)pcix_reg_base+offset))
192 * FIXME: This is only here to "make it work". This will move
193 * to a ibm_pcix.c which will contain a generic IBM PCIX bridge
194 * configuration library. -Matt
197 ebony_setup_pcix(void)
201 pcix_reg_base = ioremap64(PCIX0_REG_BASE, PCIX0_REG_SIZE);
203 /* Disable all windows */
204 PCIX_WRITEL(0, PCIX0_POM0SA);
205 PCIX_WRITEL(0, PCIX0_POM1SA);
206 PCIX_WRITEL(0, PCIX0_POM2SA);
207 PCIX_WRITEL(0, PCIX0_PIM0SA);
208 PCIX_WRITEL(0, PCIX0_PIM1SA);
209 PCIX_WRITEL(0, PCIX0_PIM2SA);
211 /* Setup 2GB PLB->PCI outbound mem window (3_8000_0000->0_8000_0000) */
212 PCIX_WRITEL(0x00000003, PCIX0_POM0LAH);
213 PCIX_WRITEL(0x80000000, PCIX0_POM0LAL);
214 PCIX_WRITEL(0x00000000, PCIX0_POM0PCIAH);
215 PCIX_WRITEL(0x80000000, PCIX0_POM0PCIAL);
216 PCIX_WRITEL(0x80000001, PCIX0_POM0SA);
218 /* Setup 2GB PCI->PLB inbound memory window at 0, enable MSIs */
219 PCIX_WRITEL(0x00000000, PCIX0_PIM0LAH);
220 PCIX_WRITEL(0x00000000, PCIX0_PIM0LAL);
221 PCIX_WRITEL(0x80000007, PCIX0_PIM0SA);
227 ebony_setup_hose(void)
229 struct pci_controller *hose;
231 /* Configure windows on the PCI-X host bridge */
234 hose = pcibios_alloc_controller();
239 hose->first_busno = 0;
240 hose->last_busno = 0xff;
242 hose->pci_mem_offset = EBONY_PCI_MEM_OFFSET;
244 pci_init_resource(&hose->io_resource,
250 pci_init_resource(&hose->mem_resources[0],
256 hose->io_space.start = EBONY_PCI_LOWER_IO;
257 hose->io_space.end = EBONY_PCI_UPPER_IO;
258 hose->mem_space.start = EBONY_PCI_LOWER_MEM;
259 hose->mem_space.end = EBONY_PCI_UPPER_MEM;
261 (unsigned long)ioremap64(EBONY_PCI_IO_BASE, EBONY_PCI_IO_SIZE);
262 hose->io_base_virt = (void *)isa_io_base;
264 setup_indirect_pci(hose,
265 EBONY_PCI_CFGA_PLB32,
266 EBONY_PCI_CFGD_PLB32);
267 hose->set_cfg_type = 1;
269 hose->last_busno = pciauto_bus_scan(hose, hose->first_busno);
271 ppc_md.pci_swizzle = common_swizzle;
272 ppc_md.pci_map_irq = ebony_map_irq;
278 ebony_early_serial_map(void)
280 struct uart_port port;
282 /* Setup ioremapped serial port access */
283 memset(&port, 0, sizeof(port));
284 port.membase = ioremap64(PPC440GP_UART0_ADDR, 8);
286 port.uartclk = BASE_BAUD * 16;
288 port.iotype = SERIAL_IO_MEM;
289 port.flags = ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST;
292 if (early_serial_setup(&port) != 0) {
293 printk("Early serial init of port 0 failed\n");
296 port.membase = ioremap64(PPC440GP_UART1_ADDR, 8);
300 if (early_serial_setup(&port) != 0) {
301 printk("Early serial init of port 1 failed\n");
306 ebony_setup_arch(void)
308 unsigned char * vpd_base;
309 struct ibm44x_clocks clocks;
311 struct ocp_func_emac_data *emacdata;
313 #if !defined(CONFIG_BDI_SWITCH)
315 * The Abatron BDI JTAG debugger does not tolerate others
316 * mucking with the debug registers.
318 mtspr(SPRN_DBCR0, (DBCR0_TDE | DBCR0_IDM));
321 /* Set mac_addr for each EMAC */
322 vpd_base = ioremap64(EBONY_VPD_BASE, EBONY_VPD_SIZE);
323 def = ocp_get_one_device(OCP_VENDOR_IBM, OCP_FUNC_EMAC, 0);
324 emacdata = def->additions;
325 memcpy(emacdata->mac_addr, EBONY_NA0_ADDR(vpd_base), 6);
326 def = ocp_get_one_device(OCP_VENDOR_IBM, OCP_FUNC_EMAC, 1);
327 emacdata = def->additions;
328 memcpy(emacdata->mac_addr, EBONY_NA1_ADDR(vpd_base), 6);
332 * Determine various clocks.
333 * To be completely correct we should get SysClk
334 * from FPGA, because it can be changed by on-board switches
337 ibm440gp_get_clocks(&clocks, 33333333, 6 * 1843200);
338 ocp_sys_info.opb_bus_freq = clocks.opb;
340 /* Setup TODC access */
341 TODC_INIT(TODC_TYPE_DS1743,
344 ioremap64(EBONY_RTC_ADDR, EBONY_RTC_SIZE),
347 /* init to some ~sane value until calibrate_delay() runs */
348 loops_per_jiffy = 50000000/HZ;
350 /* Setup PCI host bridge */
353 #ifdef CONFIG_BLK_DEV_INITRD
355 ROOT_DEV = Root_RAM0;
358 #ifdef CONFIG_ROOT_NFS
361 ROOT_DEV = Root_HDA1;
365 conswitchp = &dummy_con;
368 ebony_early_serial_map();
370 ibm4xxPIC_InitSenses = ebony_IRQ_initsenses;
371 ibm4xxPIC_NumInitSenses = sizeof(ebony_IRQ_initsenses);
373 /* Identify the system */
374 printk("IBM Ebony port (MontaVista Software, Inc. (source@mvista.com))\n");
378 ebony_restart(char *cmd)
385 ebony_power_off(void)
399 * Read the 440GP memory controller to get size of system memory.
401 static unsigned long __init
402 ebony_find_end_of_memory(void)
412 mtdcr(DCRN_SDRAM0_CFGADDR, SDRAM0_B0CR);
415 mtdcr(DCRN_SDRAM0_CFGADDR, SDRAM0_B1CR);
418 mtdcr(DCRN_SDRAM0_CFGADDR, SDRAM0_B2CR);
421 mtdcr(DCRN_SDRAM0_CFGADDR, SDRAM0_B3CR);
425 bank_config = mfdcr(DCRN_SDRAM0_CFGDATA);
427 if (!(bank_config & SDRAM_CONFIG_BANK_ENABLE))
429 switch (SDRAM_CONFIG_BANK_SIZE(bank_config))
431 case SDRAM_CONFIG_SIZE_8M:
432 mem_size += PPC44x_MEM_SIZE_8M;
434 case SDRAM_CONFIG_SIZE_16M:
435 mem_size += PPC44x_MEM_SIZE_16M;
437 case SDRAM_CONFIG_SIZE_32M:
438 mem_size += PPC44x_MEM_SIZE_32M;
440 case SDRAM_CONFIG_SIZE_64M:
441 mem_size += PPC44x_MEM_SIZE_64M;
443 case SDRAM_CONFIG_SIZE_128M:
444 mem_size += PPC44x_MEM_SIZE_128M;
446 case SDRAM_CONFIG_SIZE_256M:
447 mem_size += PPC44x_MEM_SIZE_256M;
449 case SDRAM_CONFIG_SIZE_512M:
450 mem_size += PPC44x_MEM_SIZE_512M;
464 for (i = 0; i < NR_IRQS; i++)
465 irq_desc[i].handler = ppc4xx_pic;
468 #ifdef CONFIG_SERIAL_TEXT_DEBUG
469 #include <linux/serialP.h>
470 #include <linux/serial_reg.h>
471 #include <asm/serial.h>
473 static struct serial_state rs_table[RS_TABLE_SIZE] = {
474 SERIAL_PORT_DFNS /* Defined in <asm/serial.h> */
478 ebony_progress(char *s, unsigned short hex)
481 volatile unsigned long com_port;
484 com_port = (unsigned long)rs_table[0].iomem_base;
485 shift = rs_table[0].iomem_reg_shift;
487 while ((c = *s++) != 0) {
488 while ((*((volatile unsigned char *)com_port +
489 (UART_LSR << shift)) & UART_LSR_THRE) == 0)
491 *(volatile unsigned char *)com_port = c;
495 /* Send LF/CR to pretty up output */
496 while ((*((volatile unsigned char *)com_port +
497 (UART_LSR << shift)) & UART_LSR_THRE) == 0)
499 *(volatile unsigned char *)com_port = '\r';
500 while ((*((volatile unsigned char *)com_port +
501 (UART_LSR << shift)) & UART_LSR_THRE) == 0)
503 *(volatile unsigned char *)com_port = '\n';
505 #endif /* CONFIG_SERIAL_TEXT_DEBUG */
507 void __init platform_init(unsigned long r3, unsigned long r4,
508 unsigned long r5, unsigned long r6, unsigned long r7)
510 parse_bootinfo((struct bi_record *) (r3 + KERNELBASE));
512 ppc_md.setup_arch = ebony_setup_arch;
513 ppc_md.show_cpuinfo = ebony_show_cpuinfo;
514 ppc_md.init_IRQ = ebony_init_irq;
515 ppc_md.get_irq = NULL; /* Set in ppc4xx_pic_init() */
517 ppc_md.find_end_of_memory = ebony_find_end_of_memory;
519 ppc_md.restart = ebony_restart;
520 ppc_md.power_off = ebony_power_off;
521 ppc_md.halt = ebony_halt;
523 ppc_md.calibrate_decr = ebony_calibrate_decr;
524 ppc_md.time_init = todc_time_init;
525 ppc_md.set_rtc_time = todc_set_rtc_time;
526 ppc_md.get_rtc_time = todc_get_rtc_time;
528 ppc_md.nvram_read_val = todc_direct_read_val;
529 ppc_md.nvram_write_val = todc_direct_write_val;
531 #ifdef CONFIG_SERIAL_TEXT_DEBUG
532 ppc_md.progress = ebony_progress;
533 #endif /* CONFIG_SERIAL_TEXT_DEBUG */
535 ppc_md.early_serial_map = ebony_early_serial_map;