MIPS: TXx9: stop_unused_modules

[linux-2.6-omap-h63xx.git] / arch / mips / txx9 / generic / setup_tx4927.c

diff --git a/arch/mips/txx9/generic/setup_tx4927.c b/arch/mips/txx9/generic/setup_tx4927.c
index f80d4b7a694d3791e09889d340da96f3cb3caa72..914e93c62639616690fda1c5cfd02d3b254ae877 100644 (file)
--- a/arch/mips/txx9/generic/setup_tx4927.c
+++ b/arch/mips/txx9/generic/setup_tx4927.c
@@ -14,6 +14,10 @@
 #include <linux/ioport.h>
 #include <linux/delay.h>
 #include <linux/param.h>
+#include <linux/ptrace.h>
+#include <linux/mtd/physmap.h>
+#include <asm/reboot.h>
+#include <asm/traps.h>
 #include <asm/txx9irq.h>
 #include <asm/txx9tmr.h>
 #include <asm/txx9pio.h>
@@ -22,6 +26,10 @@
 
 static void __init tx4927_wdr_init(void)
 {
+       /* report watchdog reset status */
+       if (____raw_readq(&tx4927_ccfgptr->ccfg) & TX4927_CCFG_WDRST)
+               pr_warning("Watchdog reset detected at 0x%lx\n",
+                          read_c0_errorepc());
        /* clear WatchDogReset (W1C) */
        tx4927_ccfg_set(TX4927_CCFG_WDRST);
        /* do reset on watchdog */
@@ -33,6 +41,47 @@ void __init tx4927_wdt_init(void)
        txx9_wdt_init(TX4927_TMR_REG(2) & 0xfffffffffULL);
 }
 
+static void tx4927_machine_restart(char *command)
+{
+       local_irq_disable();
+       pr_emerg("Rebooting (with %s watchdog reset)...\n",
+                (____raw_readq(&tx4927_ccfgptr->ccfg) & TX4927_CCFG_WDREXEN) ?
+                "external" : "internal");
+       /* clear watchdog status */
+       tx4927_ccfg_set(TX4927_CCFG_WDRST);     /* W1C */
+       txx9_wdt_now(TX4927_TMR_REG(2) & 0xfffffffffULL);
+       while (!(____raw_readq(&tx4927_ccfgptr->ccfg) & TX4927_CCFG_WDRST))
+               ;
+       mdelay(10);
+       if (____raw_readq(&tx4927_ccfgptr->ccfg) & TX4927_CCFG_WDREXEN) {
+               pr_emerg("Rebooting (with internal watchdog reset)...\n");
+               /* External WDRST failed.  Do internal watchdog reset */
+               tx4927_ccfg_clear(TX4927_CCFG_WDREXEN);
+       }
+       /* fallback */
+       (*_machine_halt)();
+}
+
+void show_registers(struct pt_regs *regs);
+static int tx4927_be_handler(struct pt_regs *regs, int is_fixup)
+{
+       int data = regs->cp0_cause & 4;
+       console_verbose();
+       pr_err("%cBE exception at %#lx\n", data ? 'D' : 'I', regs->cp0_epc);
+       pr_err("ccfg:%llx, toea:%llx\n",
+              (unsigned long long)____raw_readq(&tx4927_ccfgptr->ccfg),
+              (unsigned long long)____raw_readq(&tx4927_ccfgptr->toea));
+#ifdef CONFIG_PCI
+       tx4927_report_pcic_status();
+#endif
+       show_registers(regs);
+       panic("BusError!");
+}
+static void __init tx4927_be_init(void)
+{
+       board_be_handler = tx4927_be_handler;
+}
+
 static struct resource tx4927_sdram_resource[4];
 
 void __init tx4927_setup(void)
@@ -44,6 +93,7 @@ void __init tx4927_setup(void)
 
        txx9_reg_res_init(TX4927_REV_PCODE(), TX4927_REG_BASE,
                          TX4927_REG_SIZE);
+       set_c0_config(TX49_CONF_CWFON);
 
        /* SDRAMC,EBUSC are configured by PROM */
        for (i = 0; i < 8; i++) {
@@ -167,6 +217,9 @@ void __init tx4927_setup(void)
        txx9_gpio_init(TX4927_PIO_REG & 0xfffffffffULL, 0, TX4927_NUM_PIO);
        __raw_writel(0, &tx4927_pioptr->maskcpu);
        __raw_writel(0, &tx4927_pioptr->maskext);
+
+       _machine_restart = tx4927_machine_restart;
+       board_be_init = tx4927_be_init;
 }
 
 void __init tx4927_time_init(unsigned int tmrnr)
@@ -186,3 +239,47 @@ void __init tx4927_sio_init(unsigned int sclk, unsigned int cts_mask)
                              TXX9_IRQ_BASE + TX4927_IR_SIO(i),
                              i, sclk, (1 << i) & cts_mask);
 }
+
+void __init tx4927_mtd_init(int ch)
+{
+       struct physmap_flash_data pdata = {
+               .width = TX4927_EBUSC_WIDTH(ch) / 8,
+       };
+       unsigned long start = txx9_ce_res[ch].start;
+       unsigned long size = txx9_ce_res[ch].end - start + 1;
+
+       if (!(TX4927_EBUSC_CR(ch) & 0x8))
+               return; /* disabled */
+       txx9_physmap_flash_init(ch, start, size, &pdata);
+}
+
+static void __init tx4927_stop_unused_modules(void)
+{
+       __u64 pcfg, rst = 0, ckd = 0;
+       char buf[128];
+
+       buf[0] = '\0';
+       local_irq_disable();
+       pcfg = ____raw_readq(&tx4927_ccfgptr->pcfg);
+       if (!(pcfg & TX4927_PCFG_SEL2)) {
+               rst |= TX4927_CLKCTR_ACLRST;
+               ckd |= TX4927_CLKCTR_ACLCKD;
+               strcat(buf, " ACLC");
+       }
+       if (rst | ckd) {
+               txx9_set64(&tx4927_ccfgptr->clkctr, rst);
+               txx9_set64(&tx4927_ccfgptr->clkctr, ckd);
+       }
+       local_irq_enable();
+       if (buf[0])
+               pr_info("%s: stop%s\n", txx9_pcode_str, buf);
+}
+
+static int __init tx4927_late_init(void)
+{
+       if (txx9_pcode != 0x4927)
+               return -ENODEV;
+       tx4927_stop_unused_modules();
+       return 0;
+}
+late_initcall(tx4927_late_init);