diff options
Diffstat (limited to 'arch/ppc/syslib/mpc52xx_setup.c')
| -rw-r--r-- | arch/ppc/syslib/mpc52xx_setup.c | 230 |
1 files changed, 0 insertions, 230 deletions
diff --git a/arch/ppc/syslib/mpc52xx_setup.c b/arch/ppc/syslib/mpc52xx_setup.c deleted file mode 100644 index bb2374585a7..00000000000 --- a/arch/ppc/syslib/mpc52xx_setup.c +++ /dev/null @@ -1,230 +0,0 @@ -/* - * arch/ppc/syslib/mpc52xx_setup.c - * - * Common code for the boards based on Freescale MPC52xx embedded CPU. - * - * - * Maintainer : Sylvain Munaut <tnt@246tNt.com> - * - * Support for other bootloaders than UBoot by Dale Farnsworth - * <dfarnsworth@mvista.com> - * - * Copyright (C) 2004 Sylvain Munaut <tnt@246tNt.com> - * Copyright (C) 2003 Montavista Software, Inc - * - * This file is licensed under the terms of the GNU General Public License - * version 2. This program is licensed "as is" without any warranty of any - * kind, whether express or implied. - */ - -#include <linux/config.h> - -#include <asm/io.h> -#include <asm/time.h> -#include <asm/mpc52xx.h> -#include <asm/mpc52xx_psc.h> -#include <asm/pgtable.h> -#include <asm/ppcboot.h> - -extern bd_t __res; - -static int core_mult[] = { /* CPU Frequency multiplier, taken */ - 0, 0, 0, 10, 20, 20, 25, 45, /* from the datasheet used to compute */ - 30, 55, 40, 50, 0, 60, 35, 0, /* CPU frequency from XLB freq and */ - 30, 25, 65, 10, 70, 20, 75, 45, /* external jumper config */ - 0, 55, 40, 50, 80, 60, 35, 0 -}; - -void -mpc52xx_restart(char *cmd) -{ - struct mpc52xx_gpt __iomem *gpt0 = MPC52xx_VA(MPC52xx_GPTx_OFFSET(0)); - - local_irq_disable(); - - /* Turn on the watchdog and wait for it to expire. It effectively - does a reset */ - out_be32(&gpt0->count, 0x000000ff); - out_be32(&gpt0->mode, 0x00009004); - - while (1); -} - -void -mpc52xx_halt(void) -{ - local_irq_disable(); - - while (1); -} - -void -mpc52xx_power_off(void) -{ - /* By default we don't have any way of shut down. - If a specific board wants to, it can set the power down - code to any hardware implementation dependent code */ - mpc52xx_halt(); -} - - -void __init -mpc52xx_set_bat(void) -{ - /* Set BAT 2 to map the 0xf0000000 area */ - /* This mapping is used during mpc52xx_progress, - * mpc52xx_find_end_of_memory, and UARTs/GPIO access for debug - */ - mb(); - mtspr(SPRN_DBAT2U, 0xf0001ffe); - mtspr(SPRN_DBAT2L, 0xf000002a); - mb(); -} - -void __init -mpc52xx_map_io(void) -{ - /* Here we only map the MBAR */ - io_block_mapping( - MPC52xx_MBAR_VIRT, MPC52xx_MBAR, MPC52xx_MBAR_SIZE, _PAGE_IO); -} - - -#ifdef CONFIG_SERIAL_TEXT_DEBUG -#ifndef MPC52xx_PF_CONSOLE_PORT -#error "mpc52xx PSC for console not selected" -#endif - -static void -mpc52xx_psc_putc(struct mpc52xx_psc __iomem *psc, unsigned char c) -{ - while (!(in_be16(&psc->mpc52xx_psc_status) & - MPC52xx_PSC_SR_TXRDY)); - out_8(&psc->mpc52xx_psc_buffer_8, c); -} - -void -mpc52xx_progress(char *s, unsigned short hex) -{ - char c; - struct mpc52xx_psc __iomem *psc; - - psc = MPC52xx_VA(MPC52xx_PSCx_OFFSET(MPC52xx_PF_CONSOLE_PORT)); - - while ((c = *s++) != 0) { - if (c == '\n') - mpc52xx_psc_putc(psc, '\r'); - mpc52xx_psc_putc(psc, c); - } - - mpc52xx_psc_putc(psc, '\r'); - mpc52xx_psc_putc(psc, '\n'); -} - -#endif /* CONFIG_SERIAL_TEXT_DEBUG */ - - -unsigned long __init -mpc52xx_find_end_of_memory(void) -{ - u32 ramsize = __res.bi_memsize; - - /* - * if bootloader passed a memsize, just use it - * else get size from sdram config registers - */ - if (ramsize == 0) { - struct mpc52xx_mmap_ctl __iomem *mmap_ctl; - u32 sdram_config_0, sdram_config_1; - - /* Temp BAT2 mapping active when this is called ! */ - mmap_ctl = MPC52xx_VA(MPC52xx_MMAP_CTL_OFFSET); - - sdram_config_0 = in_be32(&mmap_ctl->sdram0); - sdram_config_1 = in_be32(&mmap_ctl->sdram1); - - if ((sdram_config_0 & 0x1f) >= 0x13) - ramsize = 1 << ((sdram_config_0 & 0xf) + 17); - - if (((sdram_config_1 & 0x1f) >= 0x13) && - ((sdram_config_1 & 0xfff00000) == ramsize)) - ramsize += 1 << ((sdram_config_1 & 0xf) + 17); - } - - return ramsize; -} - -void __init -mpc52xx_calibrate_decr(void) -{ - int current_time, previous_time; - int tbl_start, tbl_end; - unsigned int xlbfreq, cpufreq, ipbfreq, pcifreq, divisor; - - xlbfreq = __res.bi_busfreq; - /* if bootloader didn't pass bus frequencies, calculate them */ - if (xlbfreq == 0) { - /* Get RTC & Clock manager modules */ - struct mpc52xx_rtc __iomem *rtc; - struct mpc52xx_cdm __iomem *cdm; - - rtc = ioremap(MPC52xx_PA(MPC52xx_RTC_OFFSET), MPC52xx_RTC_SIZE); - cdm = ioremap(MPC52xx_PA(MPC52xx_CDM_OFFSET), MPC52xx_CDM_SIZE); - - if ((rtc==NULL) || (cdm==NULL)) - panic("Can't ioremap RTC/CDM while computing bus freq"); - - /* Count bus clock during 1/64 sec */ - out_be32(&rtc->dividers, 0x8f1f0000); /* Set RTC 64x faster */ - previous_time = in_be32(&rtc->time); - while ((current_time = in_be32(&rtc->time)) == previous_time) ; - tbl_start = get_tbl(); - previous_time = current_time; - while ((current_time = in_be32(&rtc->time)) == previous_time) ; - tbl_end = get_tbl(); - out_be32(&rtc->dividers, 0xffff0000); /* Restore RTC */ - - /* Compute all frequency from that & CDM settings */ - xlbfreq = (tbl_end - tbl_start) << 8; - cpufreq = (xlbfreq * core_mult[in_be32(&cdm->rstcfg)&0x1f])/10; - ipbfreq = (in_8(&cdm->ipb_clk_sel) & 1) ? - xlbfreq / 2 : xlbfreq; - switch (in_8(&cdm->pci_clk_sel) & 3) { - case 0: - pcifreq = ipbfreq; - break; - case 1: - pcifreq = ipbfreq / 2; - break; - default: - pcifreq = xlbfreq / 4; - break; - } - __res.bi_busfreq = xlbfreq; - __res.bi_intfreq = cpufreq; - __res.bi_ipbfreq = ipbfreq; - __res.bi_pcifreq = pcifreq; - - /* Release mapping */ - iounmap(rtc); - iounmap(cdm); - } - - divisor = 4; - - tb_ticks_per_jiffy = xlbfreq / HZ / divisor; - tb_to_us = mulhwu_scale_factor(xlbfreq / divisor, 1000000); -} - -int mpc52xx_match_psc_function(int psc_idx, const char *func) -{ - struct mpc52xx_psc_func *cf = mpc52xx_psc_functions; - - while ((cf->id != -1) && (cf->func != NULL)) { - if ((cf->id == psc_idx) && !strcmp(cf->func,func)) - return 1; - cf++; - } - - return 0; -} |