diff options
Diffstat (limited to 'arch/mips/txx9/generic/setup_tx4938.c')
| -rw-r--r-- | arch/mips/txx9/generic/setup_tx4938.c | 163 |
1 files changed, 148 insertions, 15 deletions
diff --git a/arch/mips/txx9/generic/setup_tx4938.c b/arch/mips/txx9/generic/setup_tx4938.c index 317378d8579..af724e53ef9 100644 --- a/arch/mips/txx9/generic/setup_tx4938.c +++ b/arch/mips/txx9/generic/setup_tx4938.c @@ -13,22 +13,75 @@ #include <linux/init.h> #include <linux/ioport.h> #include <linux/delay.h> -#include <linux/serial_core.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> #include <asm/txx9/generic.h> #include <asm/txx9/tx4938.h> -void __init tx4938_wdr_init(void) +static void __init tx4938_wdr_init(void) { + /* report watchdog reset status */ + if (____raw_readq(&tx4938_ccfgptr->ccfg) & TX4938_CCFG_WDRST) + pr_warning("Watchdog reset detected at 0x%lx\n", + read_c0_errorepc()); /* clear WatchDogReset (W1C) */ tx4938_ccfg_set(TX4938_CCFG_WDRST); /* do reset on watchdog */ tx4938_ccfg_set(TX4938_CCFG_WR); } +void __init tx4938_wdt_init(void) +{ + txx9_wdt_init(TX4938_TMR_REG(2) & 0xfffffffffULL); +} + +static void tx4938_machine_restart(char *command) +{ + local_irq_disable(); + pr_emerg("Rebooting (with %s watchdog reset)...\n", + (____raw_readq(&tx4938_ccfgptr->ccfg) & TX4938_CCFG_WDREXEN) ? + "external" : "internal"); + /* clear watchdog status */ + tx4938_ccfg_set(TX4938_CCFG_WDRST); /* W1C */ + txx9_wdt_now(TX4938_TMR_REG(2) & 0xfffffffffULL); + while (!(____raw_readq(&tx4938_ccfgptr->ccfg) & TX4938_CCFG_WDRST)) + ; + mdelay(10); + if (____raw_readq(&tx4938_ccfgptr->ccfg) & TX4938_CCFG_WDREXEN) { + pr_emerg("Rebooting (with internal watchdog reset)...\n"); + /* External WDRST failed. Do internal watchdog reset */ + tx4938_ccfg_clear(TX4938_CCFG_WDREXEN); + } + /* fallback */ + (*_machine_halt)(); +} + +void show_registers(struct pt_regs *regs); +static int tx4938_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(&tx4938_ccfgptr->ccfg), + (unsigned long long)____raw_readq(&tx4938_ccfgptr->toea)); +#ifdef CONFIG_PCI + tx4927_report_pcic_status(); +#endif + show_registers(regs); + panic("BusError!"); +} +static void __init tx4938_be_init(void) +{ + board_be_handler = tx4938_be_handler; +} + static struct resource tx4938_sdram_resource[4]; static struct resource tx4938_sram_resource; @@ -43,6 +96,7 @@ void __init tx4938_setup(void) txx9_reg_res_init(TX4938_REV_PCODE(), TX4938_REG_BASE, TX4938_REG_SIZE); + set_c0_config(TX49_CONF_CWFON); /* SDRAMC,EBUSC are configured by PROM */ for (i = 0; i < 8; i++) { @@ -223,6 +277,9 @@ void __init tx4938_setup(void) TX4938_CLKCTR_ETH1CKD); } } + + _machine_restart = tx4938_machine_restart; + board_be_init = tx4938_be_init; } void __init tx4938_time_init(unsigned int tmrnr) @@ -233,11 +290,9 @@ void __init tx4938_time_init(unsigned int tmrnr) TXX9_IMCLK); } -void __init tx4938_setup_serial(void) +void __init tx4938_sio_init(unsigned int sclk, unsigned int cts_mask) { -#ifdef CONFIG_SERIAL_TXX9 int i; - struct uart_port req; unsigned int ch_mask = 0; if (__raw_readq(&tx4938_ccfgptr->pcfg) & TX4938_PCFG_ETH0_SEL) @@ -245,15 +300,93 @@ void __init tx4938_setup_serial(void) for (i = 0; i < 2; i++) { if ((1 << i) & ch_mask) continue; - memset(&req, 0, sizeof(req)); - req.line = i; - req.iotype = UPIO_MEM; - req.membase = (unsigned char __iomem *)TX4938_SIO_REG(i); - req.mapbase = TX4938_SIO_REG(i) & 0xfffffffffULL; - req.irq = TXX9_IRQ_BASE + TX4938_IR_SIO(i); - req.flags |= UPF_BUGGY_UART /*HAVE_CTS_LINE*/; - req.uartclk = TXX9_IMCLK; - early_serial_txx9_setup(&req); + txx9_sio_init(TX4938_SIO_REG(i) & 0xfffffffffULL, + TXX9_IRQ_BASE + TX4938_IR_SIO(i), + i, sclk, (1 << i) & cts_mask); + } +} + +void __init tx4938_spi_init(int busid) +{ + txx9_spi_init(busid, TX4938_SPI_REG & 0xfffffffffULL, + TXX9_IRQ_BASE + TX4938_IR_SPI); +} + +void __init tx4938_ethaddr_init(unsigned char *addr0, unsigned char *addr1) +{ + u64 pcfg = __raw_readq(&tx4938_ccfgptr->pcfg); + + if (addr0 && (pcfg & TX4938_PCFG_ETH0_SEL)) + txx9_ethaddr_init(TXX9_IRQ_BASE + TX4938_IR_ETH0, addr0); + if (addr1 && (pcfg & TX4938_PCFG_ETH1_SEL)) + txx9_ethaddr_init(TXX9_IRQ_BASE + TX4938_IR_ETH1, addr1); +} + +void __init tx4938_mtd_init(int ch) +{ + struct physmap_flash_data pdata = { + .width = TX4938_EBUSC_WIDTH(ch) / 8, + }; + unsigned long start = txx9_ce_res[ch].start; + unsigned long size = txx9_ce_res[ch].end - start + 1; + + if (!(TX4938_EBUSC_CR(ch) & 0x8)) + return; /* disabled */ + txx9_physmap_flash_init(ch, start, size, &pdata); +} + +static void __init tx4938_stop_unused_modules(void) +{ + __u64 pcfg, rst = 0, ckd = 0; + char buf[128]; + + buf[0] = '\0'; + local_irq_disable(); + pcfg = ____raw_readq(&tx4938_ccfgptr->pcfg); + switch (txx9_pcode) { + case 0x4937: + if (!(pcfg & TX4938_PCFG_SEL2)) { + rst |= TX4938_CLKCTR_ACLRST; + ckd |= TX4938_CLKCTR_ACLCKD; + strcat(buf, " ACLC"); + } + break; + case 0x4938: + if (!(pcfg & TX4938_PCFG_SEL2) || + (pcfg & TX4938_PCFG_ETH0_SEL)) { + rst |= TX4938_CLKCTR_ACLRST; + ckd |= TX4938_CLKCTR_ACLCKD; + strcat(buf, " ACLC"); + } + if ((pcfg & + (TX4938_PCFG_ATA_SEL | TX4938_PCFG_ISA_SEL | + TX4938_PCFG_NDF_SEL)) + != TX4938_PCFG_NDF_SEL) { + rst |= TX4938_CLKCTR_NDFRST; + ckd |= TX4938_CLKCTR_NDFCKD; + strcat(buf, " NDFMC"); + } + if (!(pcfg & TX4938_PCFG_SPI_SEL)) { + rst |= TX4938_CLKCTR_SPIRST; + ckd |= TX4938_CLKCTR_SPICKD; + strcat(buf, " SPI"); + } + break; } -#endif /* CONFIG_SERIAL_TXX9 */ + if (rst | ckd) { + txx9_set64(&tx4938_ccfgptr->clkctr, rst); + txx9_set64(&tx4938_ccfgptr->clkctr, ckd); + } + local_irq_enable(); + if (buf[0]) + pr_info("%s: stop%s\n", txx9_pcode_str, buf); +} + +static int __init tx4938_late_init(void) +{ + if (txx9_pcode != 0x4937 && txx9_pcode != 0x4938) + return -ENODEV; + tx4938_stop_unused_modules(); + return 0; } +late_initcall(tx4938_late_init); |