Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/arch/ppc/syslib/mpc52xx_setup.c b/arch/ppc/syslib/mpc52xx_setup.c
new file mode 100644
index 0000000..bb23745
--- /dev/null
+++ b/arch/ppc/syslib/mpc52xx_setup.c
@@ -0,0 +1,230 @@
+/*
+ * 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;
+}