2 * MPC85XX common board code
4 * Maintainer: Kumar Gala <galak@kernel.crashing.org>
6 * Copyright 2004 Freescale Semiconductor Inc.
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
14 #include <linux/config.h>
15 #include <linux/types.h>
16 #include <linux/module.h>
17 #include <linux/init.h>
18 #include <linux/pci.h>
19 #include <linux/serial.h>
20 #include <linux/tty.h> /* for linux/serial_core.h */
21 #include <linux/serial_core.h>
22 #include <linux/serial_8250.h>
25 #include <asm/mpc85xx.h>
26 #include <asm/immap_85xx.h>
28 #include <asm/ppc_sys.h>
30 #include <asm/machdep.h>
32 #include <syslib/ppc85xx_setup.h>
34 extern void abort(void);
36 /* Return the amount of memory */
38 mpc85xx_find_end_of_memory(void)
42 binfo = (bd_t *) __res;
44 return binfo->bi_memsize;
47 /* The decrementer counts at the system (internal) clock freq divided by 8 */
49 mpc85xx_calibrate_decr(void)
51 bd_t *binfo = (bd_t *) __res;
52 unsigned int freq, divisor;
54 /* get the core frequency */
55 freq = binfo->bi_busfreq;
57 /* The timebase is updated every 8 bus clocks, HID0[SEL_TBCLK] = 0 */
59 tb_ticks_per_jiffy = freq / divisor / HZ;
60 tb_to_us = mulhwu_scale_factor(freq / divisor, 1000000);
62 /* Set the time base to zero */
66 /* Clear any pending timer interrupts */
67 mtspr(SPRN_TSR, TSR_ENW | TSR_WIS | TSR_DIS | TSR_FIS);
69 /* Enable decrementer interrupt */
70 mtspr(SPRN_TCR, TCR_DIE);
73 #ifdef CONFIG_SERIAL_8250
75 mpc85xx_early_serial_map(void)
77 #if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
78 struct uart_port serial_req;
80 struct plat_serial8250_port *pdata;
81 bd_t *binfo = (bd_t *) __res;
82 pdata = (struct plat_serial8250_port *) ppc_sys_get_pdata(MPC85xx_DUART);
84 /* Setup serial port access */
85 pdata[0].uartclk = binfo->bi_busfreq;
86 pdata[0].mapbase += binfo->bi_immr_base;
87 pdata[0].membase = ioremap(pdata[0].mapbase, MPC85xx_UART0_SIZE);
89 #if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
90 memset(&serial_req, 0, sizeof (serial_req));
91 serial_req.iotype = UPIO_MEM;
92 serial_req.mapbase = pdata[0].mapbase;
93 serial_req.membase = pdata[0].membase;
94 serial_req.regshift = 0;
96 gen550_init(0, &serial_req);
99 pdata[1].uartclk = binfo->bi_busfreq;
100 pdata[1].mapbase += binfo->bi_immr_base;
101 pdata[1].membase = ioremap(pdata[1].mapbase, MPC85xx_UART0_SIZE);
103 #if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
104 /* Assume gen550_init() doesn't modify serial_req */
105 serial_req.mapbase = pdata[1].mapbase;
106 serial_req.membase = pdata[1].membase;
108 gen550_init(1, &serial_req);
114 mpc85xx_restart(char *cmd)
121 mpc85xx_power_off(void)
136 #if defined(CONFIG_MPC8555_CDS) || defined(CONFIG_MPC8548_CDS)
137 extern void mpc85xx_cds_enable_via(struct pci_controller *hose);
138 extern void mpc85xx_cds_fixup_via(struct pci_controller *hose);
142 mpc85xx_setup_pci1(struct pci_controller *hose)
144 volatile struct ccsr_pci *pci;
145 volatile struct ccsr_guts *guts;
146 unsigned short temps;
147 bd_t *binfo = (bd_t *) __res;
149 pci = ioremap(binfo->bi_immr_base + MPC85xx_PCI1_OFFSET,
152 guts = ioremap(binfo->bi_immr_base + MPC85xx_GUTS_OFFSET,
155 early_read_config_word(hose, 0, 0, PCI_COMMAND, &temps);
156 temps |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
157 early_write_config_word(hose, 0, 0, PCI_COMMAND, temps);
159 #define PORDEVSR_PCI (0x00800000) /* PCI Mode */
160 if (guts->pordevsr & PORDEVSR_PCI) {
161 early_write_config_byte(hose, 0, 0, PCI_LATENCY_TIMER, 0x80);
164 temps = PCI_X_CMD_MAX_SPLIT | PCI_X_CMD_MAX_READ
165 | PCI_X_CMD_ERO | PCI_X_CMD_DPERR_E;
166 early_write_config_word(hose, 0, 0, PCIX_COMMAND, temps);
169 /* Disable all windows (except powar0 since its ignored) */
178 /* Setup Phys:PCI 1:1 outbound mem window @ MPC85XX_PCI1_LOWER_MEM */
179 pci->potar1 = (MPC85XX_PCI1_LOWER_MEM >> 12) & 0x000fffff;
180 pci->potear1 = 0x00000000;
181 pci->powbar1 = (MPC85XX_PCI1_LOWER_MEM >> 12) & 0x000fffff;
182 /* Enable, Mem R/W */
183 pci->powar1 = 0x80044000 |
184 (__ilog2(MPC85XX_PCI1_UPPER_MEM - MPC85XX_PCI1_LOWER_MEM + 1) - 1);
186 /* Setup outbound IO windows @ MPC85XX_PCI1_IO_BASE */
187 pci->potar2 = (MPC85XX_PCI1_LOWER_IO >> 12) & 0x000fffff;
188 pci->potear2 = 0x00000000;
189 pci->powbar2 = (MPC85XX_PCI1_IO_BASE >> 12) & 0x000fffff;
191 pci->powar2 = 0x80088000 | (__ilog2(MPC85XX_PCI1_IO_SIZE) - 1);
193 /* Setup 2G inbound Memory Window @ 0 */
194 pci->pitar1 = 0x00000000;
195 pci->piwbar1 = 0x00000000;
196 pci->piwar1 = 0xa0f5501e; /* Enable, Prefetch, Local
197 Mem, Snoop R/W, 2G */
201 extern int mpc85xx_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin);
202 extern int mpc85xx_exclude_device(u_char bus, u_char devfn);
204 #ifdef CONFIG_85xx_PCI2
206 mpc85xx_setup_pci2(struct pci_controller *hose)
208 volatile struct ccsr_pci *pci;
209 unsigned short temps;
210 bd_t *binfo = (bd_t *) __res;
212 pci = ioremap(binfo->bi_immr_base + MPC85xx_PCI2_OFFSET,
215 early_read_config_word(hose, hose->bus_offset, 0, PCI_COMMAND, &temps);
216 temps |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
217 early_write_config_word(hose, hose->bus_offset, 0, PCI_COMMAND, temps);
218 early_write_config_byte(hose, hose->bus_offset, 0, PCI_LATENCY_TIMER, 0x80);
220 /* Disable all windows (except powar0 since its ignored) */
229 /* Setup Phys:PCI 1:1 outbound mem window @ MPC85XX_PCI2_LOWER_MEM */
230 pci->potar1 = (MPC85XX_PCI2_LOWER_MEM >> 12) & 0x000fffff;
231 pci->potear1 = 0x00000000;
232 pci->powbar1 = (MPC85XX_PCI2_LOWER_MEM >> 12) & 0x000fffff;
233 /* Enable, Mem R/W */
234 pci->powar1 = 0x80044000 |
235 (__ilog2(MPC85XX_PCI2_UPPER_MEM - MPC85XX_PCI2_LOWER_MEM + 1) - 1);
237 /* Setup outbound IO windows @ MPC85XX_PCI2_IO_BASE */
238 pci->potar2 = (MPC85XX_PCI2_LOWER_IO >> 12) & 0x000fffff;
239 pci->potear2 = 0x00000000;
240 pci->powbar2 = (MPC85XX_PCI2_IO_BASE >> 12) & 0x000fffff;
242 pci->powar2 = 0x80088000 | (__ilog2(MPC85XX_PCI2_IO_SIZE) - 1);
244 /* Setup 2G inbound Memory Window @ 0 */
245 pci->pitar1 = 0x00000000;
246 pci->piwbar1 = 0x00000000;
247 pci->piwar1 = 0xa0f5501e; /* Enable, Prefetch, Local
248 Mem, Snoop R/W, 2G */
250 #endif /* CONFIG_85xx_PCI2 */
252 int mpc85xx_pci1_last_busno = 0;
255 mpc85xx_setup_hose(void)
257 struct pci_controller *hose_a;
258 #ifdef CONFIG_85xx_PCI2
259 struct pci_controller *hose_b;
261 bd_t *binfo = (bd_t *) __res;
263 hose_a = pcibios_alloc_controller();
268 ppc_md.pci_swizzle = common_swizzle;
269 ppc_md.pci_map_irq = mpc85xx_map_irq;
271 hose_a->first_busno = 0;
272 hose_a->bus_offset = 0;
273 hose_a->last_busno = 0xff;
275 setup_indirect_pci(hose_a, binfo->bi_immr_base + PCI1_CFG_ADDR_OFFSET,
276 binfo->bi_immr_base + PCI1_CFG_DATA_OFFSET);
277 hose_a->set_cfg_type = 1;
279 mpc85xx_setup_pci1(hose_a);
281 hose_a->pci_mem_offset = MPC85XX_PCI1_MEM_OFFSET;
282 hose_a->mem_space.start = MPC85XX_PCI1_LOWER_MEM;
283 hose_a->mem_space.end = MPC85XX_PCI1_UPPER_MEM;
285 hose_a->io_space.start = MPC85XX_PCI1_LOWER_IO;
286 hose_a->io_space.end = MPC85XX_PCI1_UPPER_IO;
287 hose_a->io_base_phys = MPC85XX_PCI1_IO_BASE;
288 #ifdef CONFIG_85xx_PCI2
289 hose_a->io_base_virt = ioremap(MPC85XX_PCI1_IO_BASE,
290 MPC85XX_PCI1_IO_SIZE +
291 MPC85XX_PCI2_IO_SIZE);
293 hose_a->io_base_virt = ioremap(MPC85XX_PCI1_IO_BASE,
294 MPC85XX_PCI1_IO_SIZE);
296 isa_io_base = (unsigned long)hose_a->io_base_virt;
298 /* setup resources */
299 pci_init_resource(&hose_a->mem_resources[0],
300 MPC85XX_PCI1_LOWER_MEM,
301 MPC85XX_PCI1_UPPER_MEM,
302 IORESOURCE_MEM, "PCI1 host bridge");
304 pci_init_resource(&hose_a->io_resource,
305 MPC85XX_PCI1_LOWER_IO,
306 MPC85XX_PCI1_UPPER_IO,
307 IORESOURCE_IO, "PCI1 host bridge");
309 ppc_md.pci_exclude_device = mpc85xx_exclude_device;
311 #if defined(CONFIG_MPC8555_CDS) || defined(CONFIG_MPC8548_CDS)
312 /* Pre pciauto_bus_scan VIA init */
313 mpc85xx_cds_enable_via(hose_a);
316 hose_a->last_busno = pciauto_bus_scan(hose_a, hose_a->first_busno);
318 #if defined(CONFIG_MPC8555_CDS) || defined(CONFIG_MPC8548_CDS)
319 /* Post pciauto_bus_scan VIA fixup */
320 mpc85xx_cds_fixup_via(hose_a);
323 #ifdef CONFIG_85xx_PCI2
324 hose_b = pcibios_alloc_controller();
329 hose_b->bus_offset = hose_a->last_busno + 1;
330 hose_b->first_busno = hose_a->last_busno + 1;
331 hose_b->last_busno = 0xff;
333 setup_indirect_pci(hose_b, binfo->bi_immr_base + PCI2_CFG_ADDR_OFFSET,
334 binfo->bi_immr_base + PCI2_CFG_DATA_OFFSET);
335 hose_b->set_cfg_type = 1;
337 mpc85xx_setup_pci2(hose_b);
339 hose_b->pci_mem_offset = MPC85XX_PCI2_MEM_OFFSET;
340 hose_b->mem_space.start = MPC85XX_PCI2_LOWER_MEM;
341 hose_b->mem_space.end = MPC85XX_PCI2_UPPER_MEM;
343 hose_b->io_space.start = MPC85XX_PCI2_LOWER_IO;
344 hose_b->io_space.end = MPC85XX_PCI2_UPPER_IO;
345 hose_b->io_base_phys = MPC85XX_PCI2_IO_BASE;
346 hose_b->io_base_virt = hose_a->io_base_virt + MPC85XX_PCI1_IO_SIZE;
348 /* setup resources */
349 pci_init_resource(&hose_b->mem_resources[0],
350 MPC85XX_PCI2_LOWER_MEM,
351 MPC85XX_PCI2_UPPER_MEM,
352 IORESOURCE_MEM, "PCI2 host bridge");
354 pci_init_resource(&hose_b->io_resource,
355 MPC85XX_PCI2_LOWER_IO,
356 MPC85XX_PCI2_UPPER_IO,
357 IORESOURCE_IO, "PCI2 host bridge");
359 hose_b->last_busno = pciauto_bus_scan(hose_b, hose_b->first_busno);
361 /* let board code know what the last bus number was on PCI1 */
362 mpc85xx_pci1_last_busno = hose_a->last_busno;
366 #endif /* CONFIG_PCI */