2 * arch/ppc/syslib/ppc83xx_setup.c
4 * MPC83XX common board code
6 * Maintainer: Kumar Gala <galak@kernel.crashing.org>
8 * Copyright 2005 Freescale Semiconductor 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.
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
20 * You should have received a copy of the GNU General Public License along
21 * with this program; if not, write to the Free Software Foundation, Inc.,
22 * 675 Mass Ave, Cambridge, MA 02139, USA.
24 * Added PCI support -- Tony Li <tony.li@freescale.com>
27 #include <linux/config.h>
28 #include <linux/types.h>
29 #include <linux/module.h>
30 #include <linux/init.h>
31 #include <linux/pci.h>
32 #include <linux/serial.h>
33 #include <linux/tty.h> /* for linux/serial_core.h */
34 #include <linux/serial_core.h>
35 #include <linux/serial_8250.h>
38 #include <asm/mpc83xx.h>
40 #include <asm/ppc_sys.h>
42 #include <asm/delay.h>
43 #include <asm/machdep.h>
45 #include <syslib/ppc83xx_setup.h>
46 #if defined(CONFIG_PCI)
47 #include <asm/delay.h>
48 #include <syslib/ppc83xx_pci.h>
53 /* Return the amount of memory */
55 mpc83xx_find_end_of_memory(void)
59 binfo = (bd_t *) __res;
61 return binfo->bi_memsize;
65 mpc83xx_time_init(void)
67 #define SPCR_OFFS 0x00000110
68 #define SPCR_TBEN 0x00400000
70 bd_t *binfo = (bd_t *)__res;
71 u32 *spcr = ioremap(binfo->bi_immr_base + SPCR_OFFS, 4);
80 /* The decrementer counts at the system (internal) clock freq divided by 4 */
82 mpc83xx_calibrate_decr(void)
84 bd_t *binfo = (bd_t *) __res;
85 unsigned int freq, divisor;
87 freq = binfo->bi_busfreq;
89 tb_ticks_per_jiffy = freq / HZ / divisor;
90 tb_to_us = mulhwu_scale_factor(freq / divisor, 1000000);
93 #ifdef CONFIG_SERIAL_8250
95 mpc83xx_early_serial_map(void)
97 #if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
98 struct uart_port serial_req;
100 struct plat_serial8250_port *pdata;
101 bd_t *binfo = (bd_t *) __res;
102 pdata = (struct plat_serial8250_port *) ppc_sys_get_pdata(MPC83xx_DUART);
104 /* Setup serial port access */
105 pdata[0].uartclk = binfo->bi_busfreq;
106 pdata[0].mapbase += binfo->bi_immr_base;
107 pdata[0].membase = ioremap(pdata[0].mapbase, 0x100);
109 #if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
110 memset(&serial_req, 0, sizeof (serial_req));
111 serial_req.iotype = SERIAL_IO_MEM;
112 serial_req.mapbase = pdata[0].mapbase;
113 serial_req.membase = pdata[0].membase;
114 serial_req.regshift = 0;
116 gen550_init(0, &serial_req);
119 pdata[1].uartclk = binfo->bi_busfreq;
120 pdata[1].mapbase += binfo->bi_immr_base;
121 pdata[1].membase = ioremap(pdata[1].mapbase, 0x100);
123 #if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
124 /* Assume gen550_init() doesn't modify serial_req */
125 serial_req.mapbase = pdata[1].mapbase;
126 serial_req.membase = pdata[1].membase;
128 gen550_init(1, &serial_req);
134 mpc83xx_restart(char *cmd)
136 volatile unsigned char __iomem *reg;
139 reg = ioremap(BCSR_PHYS_ADDR, BCSR_SIZE);
144 * Unlock the BCSR bits so a PRST will update the contents.
145 * Otherwise the reset asserts but doesn't clear.
147 tmp = in_8(reg + BCSR_MISC_REG3_OFF);
148 tmp |= BCSR_MISC_REG3_CNFLOCK; /* low true, high false */
149 out_8(reg + BCSR_MISC_REG3_OFF, tmp);
152 * Trigger a reset via a low->high transition of the
155 tmp = in_8(reg + BCSR_MISC_REG2_OFF);
156 tmp &= ~BCSR_MISC_REG2_PORESET;
157 out_8(reg + BCSR_MISC_REG2_OFF, tmp);
161 tmp |= BCSR_MISC_REG2_PORESET;
162 out_8(reg + BCSR_MISC_REG2_OFF, tmp);
168 mpc83xx_power_off(void)
181 #if defined(CONFIG_PCI)
183 mpc83xx_setup_pci1(struct pci_controller *hose)
186 volatile immr_pcictrl_t * pci_ctrl;
187 volatile immr_ios_t * ios;
188 bd_t *binfo = (bd_t *) __res;
190 pci_ctrl = ioremap(binfo->bi_immr_base + 0x8500, sizeof(immr_pcictrl_t));
191 ios = ioremap(binfo->bi_immr_base + 0x8400, sizeof(immr_ios_t));
194 * Configure PCI Outbound Translation Windows
196 ios->potar0 = (MPC83xx_PCI1_LOWER_MEM >> 12) & POTAR_TA_MASK;
197 ios->pobar0 = (MPC83xx_PCI1_LOWER_MEM >> 12) & POBAR_BA_MASK;
198 ios->pocmr0 = POCMR_EN |
199 (((0xffffffff - (MPC83xx_PCI1_UPPER_MEM -
200 MPC83xx_PCI1_LOWER_MEM)) >> 12) & POCMR_CM_MASK);
202 /* mapped to PCI1 IO space */
203 ios->potar1 = (MPC83xx_PCI1_LOWER_IO >> 12) & POTAR_TA_MASK;
204 ios->pobar1 = (MPC83xx_PCI1_IO_BASE >> 12) & POBAR_BA_MASK;
205 ios->pocmr1 = POCMR_EN | POCMR_IO |
206 (((0xffffffff - (MPC83xx_PCI1_UPPER_IO -
207 MPC83xx_PCI1_LOWER_IO)) >> 12) & POCMR_CM_MASK);
210 * Configure PCI Inbound Translation Windows
212 pci_ctrl->pitar1 = 0x0;
213 pci_ctrl->pibar1 = 0x0;
214 pci_ctrl->piebar1 = 0x0;
215 pci_ctrl->piwar1 = PIWAR_EN | PIWAR_PF | PIWAR_RTT_SNOOP | PIWAR_WTT_SNOOP | PIWAR_IWS_2G;
218 * Release PCI RST signal
226 early_read_config_word(hose, hose->first_busno, 0, PCI_COMMAND, ®16);
227 reg16 |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
228 early_write_config_word(hose, hose->first_busno, 0, PCI_COMMAND, reg16);
231 * Clear non-reserved bits in status register.
233 early_write_config_word(hose, hose->first_busno, 0, PCI_STATUS, 0xffff);
234 early_write_config_byte(hose, hose->first_busno, 0, PCI_LATENCY_TIMER, 0x80);
241 mpc83xx_setup_pci2(struct pci_controller *hose)
244 volatile immr_pcictrl_t * pci_ctrl;
245 volatile immr_ios_t * ios;
246 bd_t *binfo = (bd_t *) __res;
248 pci_ctrl = ioremap(binfo->bi_immr_base + 0x8600, sizeof(immr_pcictrl_t));
249 ios = ioremap(binfo->bi_immr_base + 0x8400, sizeof(immr_ios_t));
252 * Configure PCI Outbound Translation Windows
254 ios->potar3 = (MPC83xx_PCI2_LOWER_MEM >> 12) & POTAR_TA_MASK;
255 ios->pobar3 = (MPC83xx_PCI2_LOWER_MEM >> 12) & POBAR_BA_MASK;
256 ios->pocmr3 = POCMR_EN | POCMR_DST |
257 (((0xffffffff - (MPC83xx_PCI2_UPPER_MEM -
258 MPC83xx_PCI2_LOWER_MEM)) >> 12) & POCMR_CM_MASK);
260 /* mapped to PCI2 IO space */
261 ios->potar4 = (MPC83xx_PCI2_LOWER_IO >> 12) & POTAR_TA_MASK;
262 ios->pobar4 = (MPC83xx_PCI2_IO_BASE >> 12) & POBAR_BA_MASK;
263 ios->pocmr4 = POCMR_EN | POCMR_DST | POCMR_IO |
264 (((0xffffffff - (MPC83xx_PCI2_UPPER_IO -
265 MPC83xx_PCI2_LOWER_IO)) >> 12) & POCMR_CM_MASK);
268 * Configure PCI Inbound Translation Windows
270 pci_ctrl->pitar1 = 0x0;
271 pci_ctrl->pibar1 = 0x0;
272 pci_ctrl->piebar1 = 0x0;
273 pci_ctrl->piwar1 = PIWAR_EN | PIWAR_PF | PIWAR_RTT_SNOOP | PIWAR_WTT_SNOOP | PIWAR_IWS_2G;
276 * Release PCI RST signal
284 early_read_config_word(hose, hose->first_busno, 0, PCI_COMMAND, ®16);
285 reg16 |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
286 early_write_config_word(hose, hose->first_busno, 0, PCI_COMMAND, reg16);
289 * Clear non-reserved bits in status register.
291 early_write_config_word(hose, hose->first_busno, 0, PCI_STATUS, 0xffff);
292 early_write_config_byte(hose, hose->first_busno, 0, PCI_LATENCY_TIMER, 0x80);
299 * PCI buses can be enabled only if SYS board combinates with PIB
300 * (Platform IO Board) board which provide 3 PCI slots. There is 2 PCI buses
301 * and 3 PCI slots, so people must configure the routes between them before
302 * enable PCI bus. This routes are under the control of PCA9555PW device which
303 * can be accessed via I2C bus 2 and are configured by firmware. Refer to
304 * Freescale to get more information about firmware configuration.
307 extern int mpc83xx_exclude_device(u_char bus, u_char devfn);
308 extern int mpc83xx_map_irq(struct pci_dev *dev, unsigned char idsel,
311 mpc83xx_setup_hose(void)
314 volatile immr_clk_t * clk;
315 struct pci_controller * hose1;
316 #ifdef CONFIG_MPC83xx_PCI2
317 struct pci_controller * hose2;
319 bd_t * binfo = (bd_t *)__res;
321 clk = ioremap(binfo->bi_immr_base + 0xA00,
325 * Configure PCI controller and PCI_CLK_OUTPUT both in 66M mode
329 clk->occr = 0xff000000;
334 hose1 = pcibios_alloc_controller();
338 ppc_md.pci_swizzle = common_swizzle;
339 ppc_md.pci_map_irq = mpc83xx_map_irq;
341 hose1->bus_offset = 0;
342 hose1->first_busno = 0;
343 hose1->last_busno = 0xff;
345 setup_indirect_pci(hose1, binfo->bi_immr_base + PCI1_CFG_ADDR_OFFSET,
346 binfo->bi_immr_base + PCI1_CFG_DATA_OFFSET);
347 hose1->set_cfg_type = 1;
349 mpc83xx_setup_pci1(hose1);
351 hose1->pci_mem_offset = MPC83xx_PCI1_MEM_OFFSET;
352 hose1->mem_space.start = MPC83xx_PCI1_LOWER_MEM;
353 hose1->mem_space.end = MPC83xx_PCI1_UPPER_MEM;
355 hose1->io_base_phys = MPC83xx_PCI1_IO_BASE;
356 hose1->io_space.start = MPC83xx_PCI1_LOWER_IO;
357 hose1->io_space.end = MPC83xx_PCI1_UPPER_IO;
358 #ifdef CONFIG_MPC83xx_PCI2
359 isa_io_base = (unsigned long)ioremap(MPC83xx_PCI1_IO_BASE,
360 MPC83xx_PCI1_IO_SIZE + MPC83xx_PCI2_IO_SIZE);
362 isa_io_base = (unsigned long)ioremap(MPC83xx_PCI1_IO_BASE,
363 MPC83xx_PCI1_IO_SIZE);
364 #endif /* CONFIG_MPC83xx_PCI2 */
365 hose1->io_base_virt = (void *)isa_io_base;
366 /* setup resources */
367 pci_init_resource(&hose1->io_resource,
368 MPC83xx_PCI1_LOWER_IO,
369 MPC83xx_PCI1_UPPER_IO,
370 IORESOURCE_IO, "PCI host bridge 1");
371 pci_init_resource(&hose1->mem_resources[0],
372 MPC83xx_PCI1_LOWER_MEM,
373 MPC83xx_PCI1_UPPER_MEM,
374 IORESOURCE_MEM, "PCI host bridge 1");
376 ppc_md.pci_exclude_device = mpc83xx_exclude_device;
377 hose1->last_busno = pciauto_bus_scan(hose1, hose1->first_busno);
379 #ifdef CONFIG_MPC83xx_PCI2
380 hose2 = pcibios_alloc_controller();
384 hose2->bus_offset = hose1->last_busno + 1;
385 hose2->first_busno = hose1->last_busno + 1;
386 hose2->last_busno = 0xff;
387 setup_indirect_pci(hose2, binfo->bi_immr_base + PCI2_CFG_ADDR_OFFSET,
388 binfo->bi_immr_base + PCI2_CFG_DATA_OFFSET);
389 hose2->set_cfg_type = 1;
391 mpc83xx_setup_pci2(hose2);
393 hose2->pci_mem_offset = MPC83xx_PCI2_MEM_OFFSET;
394 hose2->mem_space.start = MPC83xx_PCI2_LOWER_MEM;
395 hose2->mem_space.end = MPC83xx_PCI2_UPPER_MEM;
397 hose2->io_base_phys = MPC83xx_PCI2_IO_BASE;
398 hose2->io_space.start = MPC83xx_PCI2_LOWER_IO;
399 hose2->io_space.end = MPC83xx_PCI2_UPPER_IO;
400 hose2->io_base_virt = (void *)(isa_io_base + MPC83xx_PCI1_IO_SIZE);
401 /* setup resources */
402 pci_init_resource(&hose2->io_resource,
403 MPC83xx_PCI2_LOWER_IO,
404 MPC83xx_PCI2_UPPER_IO,
405 IORESOURCE_IO, "PCI host bridge 2");
406 pci_init_resource(&hose2->mem_resources[0],
407 MPC83xx_PCI2_LOWER_MEM,
408 MPC83xx_PCI2_UPPER_MEM,
409 IORESOURCE_MEM, "PCI host bridge 2");
411 hose2->last_busno = pciauto_bus_scan(hose2, hose2->first_busno);
412 #endif /* CONFIG_MPC83xx_PCI2 */
414 #endif /*CONFIG_PCI*/