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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/sparc64/kernel/central.c
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!
Diffstat (limited to 'arch/sparc64/kernel/central.c')
-rw-r--r--arch/sparc64/kernel/central.c457
1 files changed, 457 insertions, 0 deletions
diff --git a/arch/sparc64/kernel/central.c b/arch/sparc64/kernel/central.c
new file mode 100644
index 00000000000..3d184a78496
--- /dev/null
+++ b/arch/sparc64/kernel/central.c
@@ -0,0 +1,457 @@
+/* $Id: central.c,v 1.15 2001/12/19 00:29:51 davem Exp $
+ * central.c: Central FHC driver for Sunfire/Starfire/Wildfire.
+ *
+ * Copyright (C) 1997, 1999 David S. Miller (davem@redhat.com)
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/sched.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/bootmem.h>
+
+#include <asm/page.h>
+#include <asm/fhc.h>
+#include <asm/starfire.h>
+
+struct linux_central *central_bus = NULL;
+struct linux_fhc *fhc_list = NULL;
+
+#define IS_CENTRAL_FHC(__fhc) ((__fhc) == central_bus->child)
+
+static void central_probe_failure(int line)
+{
+ prom_printf("CENTRAL: Critical device probe failure at central.c:%d\n",
+ line);
+ prom_halt();
+}
+
+static void central_ranges_init(int cnode, struct linux_central *central)
+{
+ int success;
+
+ central->num_central_ranges = 0;
+ success = prom_getproperty(central->prom_node, "ranges",
+ (char *) central->central_ranges,
+ sizeof (central->central_ranges));
+ if (success != -1)
+ central->num_central_ranges = (success/sizeof(struct linux_prom_ranges));
+}
+
+static void fhc_ranges_init(int fnode, struct linux_fhc *fhc)
+{
+ int success;
+
+ fhc->num_fhc_ranges = 0;
+ success = prom_getproperty(fhc->prom_node, "ranges",
+ (char *) fhc->fhc_ranges,
+ sizeof (fhc->fhc_ranges));
+ if (success != -1)
+ fhc->num_fhc_ranges = (success/sizeof(struct linux_prom_ranges));
+}
+
+/* Range application routines are exported to various drivers,
+ * so do not __init this.
+ */
+static void adjust_regs(struct linux_prom_registers *regp, int nregs,
+ struct linux_prom_ranges *rangep, int nranges)
+{
+ int regc, rngc;
+
+ for (regc = 0; regc < nregs; regc++) {
+ for (rngc = 0; rngc < nranges; rngc++)
+ if (regp[regc].which_io == rangep[rngc].ot_child_space)
+ break; /* Fount it */
+ if (rngc == nranges) /* oops */
+ central_probe_failure(__LINE__);
+ regp[regc].which_io = rangep[rngc].ot_parent_space;
+ regp[regc].phys_addr -= rangep[rngc].ot_child_base;
+ regp[regc].phys_addr += rangep[rngc].ot_parent_base;
+ }
+}
+
+/* Apply probed fhc ranges to registers passed, if no ranges return. */
+void apply_fhc_ranges(struct linux_fhc *fhc,
+ struct linux_prom_registers *regs,
+ int nregs)
+{
+ if (fhc->num_fhc_ranges)
+ adjust_regs(regs, nregs, fhc->fhc_ranges,
+ fhc->num_fhc_ranges);
+}
+
+/* Apply probed central ranges to registers passed, if no ranges return. */
+void apply_central_ranges(struct linux_central *central,
+ struct linux_prom_registers *regs, int nregs)
+{
+ if (central->num_central_ranges)
+ adjust_regs(regs, nregs, central->central_ranges,
+ central->num_central_ranges);
+}
+
+void * __init central_alloc_bootmem(unsigned long size)
+{
+ void *ret;
+
+ ret = __alloc_bootmem(size, SMP_CACHE_BYTES, 0UL);
+ if (ret != NULL)
+ memset(ret, 0, size);
+
+ return ret;
+}
+
+static unsigned long prom_reg_to_paddr(struct linux_prom_registers *r)
+{
+ unsigned long ret = ((unsigned long) r->which_io) << 32;
+
+ return ret | (unsigned long) r->phys_addr;
+}
+
+static void probe_other_fhcs(void)
+{
+ struct linux_prom64_registers fpregs[6];
+ char namebuf[128];
+ int node;
+
+ node = prom_getchild(prom_root_node);
+ node = prom_searchsiblings(node, "fhc");
+ if (node == 0)
+ central_probe_failure(__LINE__);
+ while (node) {
+ struct linux_fhc *fhc;
+ int board;
+ u32 tmp;
+
+ fhc = (struct linux_fhc *)
+ central_alloc_bootmem(sizeof(struct linux_fhc));
+ if (fhc == NULL)
+ central_probe_failure(__LINE__);
+
+ /* Link it into the FHC chain. */
+ fhc->next = fhc_list;
+ fhc_list = fhc;
+
+ /* Toplevel FHCs have no parent. */
+ fhc->parent = NULL;
+
+ fhc->prom_node = node;
+ prom_getstring(node, "name", namebuf, sizeof(namebuf));
+ strcpy(fhc->prom_name, namebuf);
+ fhc_ranges_init(node, fhc);
+
+ /* Non-central FHC's have 64-bit OBP format registers. */
+ if (prom_getproperty(node, "reg",
+ (char *)&fpregs[0], sizeof(fpregs)) == -1)
+ central_probe_failure(__LINE__);
+
+ /* Only central FHC needs special ranges applied. */
+ fhc->fhc_regs.pregs = fpregs[0].phys_addr;
+ fhc->fhc_regs.ireg = fpregs[1].phys_addr;
+ fhc->fhc_regs.ffregs = fpregs[2].phys_addr;
+ fhc->fhc_regs.sregs = fpregs[3].phys_addr;
+ fhc->fhc_regs.uregs = fpregs[4].phys_addr;
+ fhc->fhc_regs.tregs = fpregs[5].phys_addr;
+
+ board = prom_getintdefault(node, "board#", -1);
+ fhc->board = board;
+
+ tmp = upa_readl(fhc->fhc_regs.pregs + FHC_PREGS_JCTRL);
+ if ((tmp & FHC_JTAG_CTRL_MENAB) != 0)
+ fhc->jtag_master = 1;
+ else
+ fhc->jtag_master = 0;
+
+ tmp = upa_readl(fhc->fhc_regs.pregs + FHC_PREGS_ID);
+ printk("FHC(board %d): Version[%x] PartID[%x] Manuf[%x] %s\n",
+ board,
+ (tmp & FHC_ID_VERS) >> 28,
+ (tmp & FHC_ID_PARTID) >> 12,
+ (tmp & FHC_ID_MANUF) >> 1,
+ (fhc->jtag_master ? "(JTAG Master)" : ""));
+
+ /* This bit must be set in all non-central FHC's in
+ * the system. When it is clear, this identifies
+ * the central board.
+ */
+ tmp = upa_readl(fhc->fhc_regs.pregs + FHC_PREGS_CTRL);
+ tmp |= FHC_CONTROL_IXIST;
+ upa_writel(tmp, fhc->fhc_regs.pregs + FHC_PREGS_CTRL);
+
+ /* Look for the next FHC. */
+ node = prom_getsibling(node);
+ if (node == 0)
+ break;
+ node = prom_searchsiblings(node, "fhc");
+ if (node == 0)
+ break;
+ }
+}
+
+static void probe_clock_board(struct linux_central *central,
+ struct linux_fhc *fhc,
+ int cnode, int fnode)
+{
+ struct linux_prom_registers cregs[3];
+ int clknode, nslots, tmp, nregs;
+
+ clknode = prom_searchsiblings(prom_getchild(fnode), "clock-board");
+ if (clknode == 0 || clknode == -1)
+ central_probe_failure(__LINE__);
+
+ nregs = prom_getproperty(clknode, "reg", (char *)&cregs[0], sizeof(cregs));
+ if (nregs == -1)
+ central_probe_failure(__LINE__);
+
+ nregs /= sizeof(struct linux_prom_registers);
+ apply_fhc_ranges(fhc, &cregs[0], nregs);
+ apply_central_ranges(central, &cregs[0], nregs);
+ central->cfreg = prom_reg_to_paddr(&cregs[0]);
+ central->clkregs = prom_reg_to_paddr(&cregs[1]);
+
+ if (nregs == 2)
+ central->clkver = 0UL;
+ else
+ central->clkver = prom_reg_to_paddr(&cregs[2]);
+
+ tmp = upa_readb(central->clkregs + CLOCK_STAT1);
+ tmp &= 0xc0;
+ switch(tmp) {
+ case 0x40:
+ nslots = 16;
+ break;
+ case 0xc0:
+ nslots = 8;
+ break;
+ case 0x80:
+ if (central->clkver != 0UL &&
+ upa_readb(central->clkver) != 0) {
+ if ((upa_readb(central->clkver) & 0x80) != 0)
+ nslots = 4;
+ else
+ nslots = 5;
+ break;
+ }
+ default:
+ nslots = 4;
+ break;
+ };
+ central->slots = nslots;
+ printk("CENTRAL: Detected %d slot Enterprise system. cfreg[%02x] cver[%02x]\n",
+ central->slots, upa_readb(central->cfreg),
+ (central->clkver ? upa_readb(central->clkver) : 0x00));
+}
+
+static void ZAP(unsigned long iclr, unsigned long imap)
+{
+ u32 imap_tmp;
+
+ upa_writel(0, iclr);
+ upa_readl(iclr);
+ imap_tmp = upa_readl(imap);
+ imap_tmp &= ~(0x80000000);
+ upa_writel(imap_tmp, imap);
+ upa_readl(imap);
+}
+
+static void init_all_fhc_hw(void)
+{
+ struct linux_fhc *fhc;
+
+ for (fhc = fhc_list; fhc != NULL; fhc = fhc->next) {
+ u32 tmp;
+
+ /* Clear all of the interrupt mapping registers
+ * just in case OBP left them in a foul state.
+ */
+ ZAP(fhc->fhc_regs.ffregs + FHC_FFREGS_ICLR,
+ fhc->fhc_regs.ffregs + FHC_FFREGS_IMAP);
+ ZAP(fhc->fhc_regs.sregs + FHC_SREGS_ICLR,
+ fhc->fhc_regs.sregs + FHC_SREGS_IMAP);
+ ZAP(fhc->fhc_regs.uregs + FHC_UREGS_ICLR,
+ fhc->fhc_regs.uregs + FHC_UREGS_IMAP);
+ ZAP(fhc->fhc_regs.tregs + FHC_TREGS_ICLR,
+ fhc->fhc_regs.tregs + FHC_TREGS_IMAP);
+
+ /* Setup FHC control register. */
+ tmp = upa_readl(fhc->fhc_regs.pregs + FHC_PREGS_CTRL);
+
+ /* All non-central boards have this bit set. */
+ if (! IS_CENTRAL_FHC(fhc))
+ tmp |= FHC_CONTROL_IXIST;
+
+ /* For all FHCs, clear the firmware synchronization
+ * line and both low power mode enables.
+ */
+ tmp &= ~(FHC_CONTROL_AOFF | FHC_CONTROL_BOFF |
+ FHC_CONTROL_SLINE);
+
+ upa_writel(tmp, fhc->fhc_regs.pregs + FHC_PREGS_CTRL);
+ upa_readl(fhc->fhc_regs.pregs + FHC_PREGS_CTRL);
+ }
+
+}
+
+void central_probe(void)
+{
+ struct linux_prom_registers fpregs[6];
+ struct linux_fhc *fhc;
+ char namebuf[128];
+ int cnode, fnode, err;
+
+ cnode = prom_finddevice("/central");
+ if (cnode == 0 || cnode == -1) {
+ if (this_is_starfire)
+ starfire_cpu_setup();
+ return;
+ }
+
+ /* Ok we got one, grab some memory for software state. */
+ central_bus = (struct linux_central *)
+ central_alloc_bootmem(sizeof(struct linux_central));
+ if (central_bus == NULL)
+ central_probe_failure(__LINE__);
+
+ fhc = (struct linux_fhc *)
+ central_alloc_bootmem(sizeof(struct linux_fhc));
+ if (fhc == NULL)
+ central_probe_failure(__LINE__);
+
+ /* First init central. */
+ central_bus->child = fhc;
+ central_bus->prom_node = cnode;
+
+ prom_getstring(cnode, "name", namebuf, sizeof(namebuf));
+ strcpy(central_bus->prom_name, namebuf);
+
+ central_ranges_init(cnode, central_bus);
+
+ /* And then central's FHC. */
+ fhc->next = fhc_list;
+ fhc_list = fhc;
+
+ fhc->parent = central_bus;
+ fnode = prom_searchsiblings(prom_getchild(cnode), "fhc");
+ if (fnode == 0 || fnode == -1)
+ central_probe_failure(__LINE__);
+
+ fhc->prom_node = fnode;
+ prom_getstring(fnode, "name", namebuf, sizeof(namebuf));
+ strcpy(fhc->prom_name, namebuf);
+
+ fhc_ranges_init(fnode, fhc);
+
+ /* Now, map in FHC register set. */
+ if (prom_getproperty(fnode, "reg", (char *)&fpregs[0], sizeof(fpregs)) == -1)
+ central_probe_failure(__LINE__);
+
+ apply_central_ranges(central_bus, &fpregs[0], 6);
+
+ fhc->fhc_regs.pregs = prom_reg_to_paddr(&fpregs[0]);
+ fhc->fhc_regs.ireg = prom_reg_to_paddr(&fpregs[1]);
+ fhc->fhc_regs.ffregs = prom_reg_to_paddr(&fpregs[2]);
+ fhc->fhc_regs.sregs = prom_reg_to_paddr(&fpregs[3]);
+ fhc->fhc_regs.uregs = prom_reg_to_paddr(&fpregs[4]);
+ fhc->fhc_regs.tregs = prom_reg_to_paddr(&fpregs[5]);
+
+ /* Obtain board number from board status register, Central's
+ * FHC lacks "board#" property.
+ */
+ err = upa_readl(fhc->fhc_regs.pregs + FHC_PREGS_BSR);
+ fhc->board = (((err >> 16) & 0x01) |
+ ((err >> 12) & 0x0e));
+
+ fhc->jtag_master = 0;
+
+ /* Attach the clock board registers for CENTRAL. */
+ probe_clock_board(central_bus, fhc, cnode, fnode);
+
+ err = upa_readl(fhc->fhc_regs.pregs + FHC_PREGS_ID);
+ printk("FHC(board %d): Version[%x] PartID[%x] Manuf[%x] (CENTRAL)\n",
+ fhc->board,
+ ((err & FHC_ID_VERS) >> 28),
+ ((err & FHC_ID_PARTID) >> 12),
+ ((err & FHC_ID_MANUF) >> 1));
+
+ probe_other_fhcs();
+
+ init_all_fhc_hw();
+}
+
+static __inline__ void fhc_ledblink(struct linux_fhc *fhc, int on)
+{
+ u32 tmp;
+
+ tmp = upa_readl(fhc->fhc_regs.pregs + FHC_PREGS_CTRL);
+
+ /* NOTE: reverse logic on this bit */
+ if (on)
+ tmp &= ~(FHC_CONTROL_RLED);
+ else
+ tmp |= FHC_CONTROL_RLED;
+ tmp &= ~(FHC_CONTROL_AOFF | FHC_CONTROL_BOFF | FHC_CONTROL_SLINE);
+
+ upa_writel(tmp, fhc->fhc_regs.pregs + FHC_PREGS_CTRL);
+ upa_readl(fhc->fhc_regs.pregs + FHC_PREGS_CTRL);
+}
+
+static __inline__ void central_ledblink(struct linux_central *central, int on)
+{
+ u8 tmp;
+
+ tmp = upa_readb(central->clkregs + CLOCK_CTRL);
+
+ /* NOTE: reverse logic on this bit */
+ if (on)
+ tmp &= ~(CLOCK_CTRL_RLED);
+ else
+ tmp |= CLOCK_CTRL_RLED;
+
+ upa_writeb(tmp, central->clkregs + CLOCK_CTRL);
+ upa_readb(central->clkregs + CLOCK_CTRL);
+}
+
+static struct timer_list sftimer;
+static int led_state;
+
+static void sunfire_timer(unsigned long __ignored)
+{
+ struct linux_fhc *fhc;
+
+ central_ledblink(central_bus, led_state);
+ for (fhc = fhc_list; fhc != NULL; fhc = fhc->next)
+ if (! IS_CENTRAL_FHC(fhc))
+ fhc_ledblink(fhc, led_state);
+ led_state = ! led_state;
+ sftimer.expires = jiffies + (HZ >> 1);
+ add_timer(&sftimer);
+}
+
+/* After PCI/SBUS busses have been probed, this is called to perform
+ * final initialization of all FireHose Controllers in the system.
+ */
+void firetruck_init(void)
+{
+ struct linux_central *central = central_bus;
+ u8 ctrl;
+
+ /* No central bus, nothing to do. */
+ if (central == NULL)
+ return;
+
+ /* OBP leaves it on, turn it off so clock board timer LED
+ * is in sync with FHC ones.
+ */
+ ctrl = upa_readb(central->clkregs + CLOCK_CTRL);
+ ctrl &= ~(CLOCK_CTRL_RLED);
+ upa_writeb(ctrl, central->clkregs + CLOCK_CTRL);
+
+ led_state = 0;
+ init_timer(&sftimer);
+ sftimer.data = 0;
+ sftimer.function = &sunfire_timer;
+ sftimer.expires = jiffies + (HZ >> 1);
+ add_timer(&sftimer);
+}