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/*
* TX4938/4937 setup routines
* Based on linux/arch/mips/txx9/rbtx4938/setup.c,
* and RBTX49xx patch from CELF patch archive.
*
* 2003-2005 (c) MontaVista Software, Inc.
* (C) Copyright TOSHIBA CORPORATION 2000-2001, 2004-2007
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#include <linux/init.h>
#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>
#include <asm/txx9/generic.h>
#include <asm/txx9/tx4938.h>
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;
#define TX4938_SRAM_SIZE 0x800
void __init tx4938_setup(void)
{
int i;
__u32 divmode;
int cpuclk = 0;
u64 ccfg;
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++) {
if (!(TX4938_EBUSC_CR(i) & 0x8))
continue; /* disabled */
txx9_ce_res[i].start = (unsigned long)TX4938_EBUSC_BA(i);
txx9_ce_res[i].end =
txx9_ce_res[i].start + TX4938_EBUSC_SIZE(i) - 1;
request_resource(&iomem_resource, &txx9_ce_res[i]);
}
/* clocks */
ccfg = ____raw_readq(&tx4938_ccfgptr->ccfg);
if (txx9_master_clock) {
/* calculate gbus_clock and cpu_clock from master_clock */
divmode = (__u32)ccfg & TX4938_CCFG_DIVMODE_MASK;
switch (divmode) {
case TX4938_CCFG_DIVMODE_8:
case TX4938_CCFG_DIVMODE_10:
case TX4938_CCFG_DIVMODE_12:
case TX4938_CCFG_DIVMODE_16:
case TX4938_CCFG_DIVMODE_18:
txx9_gbus_clock = txx9_master_clock * 4; break;
default:
txx9_gbus_clock = txx9_master_clock;
}
switch (divmode) {
case TX4938_CCFG_DIVMODE_2:
case TX4938_CCFG_DIVMODE_8:
cpuclk = txx9_gbus_clock * 2; break;
case TX4938_CCFG_DIVMODE_2_5:
case TX4938_CCFG_DIVMODE_10:
cpuclk = txx9_gbus_clock * 5 / 2; break;
case TX4938_CCFG_DIVMODE_3:
case TX4938_CCFG_DIVMODE_12:
cpuclk = txx9_gbus_clock * 3; break;
case TX4938_CCFG_DIVMODE_4:
case TX4938_CCFG_DIVMODE_16:
cpuclk = txx9_gbus_clock * 4; break;
case TX4938_CCFG_DIVMODE_4_5:
case TX4938_CCFG_DIVMODE_18:
cpuclk = txx9_gbus_clock * 9 / 2; break;
}
txx9_cpu_clock = cpuclk;
} else {
if (txx9_cpu_clock == 0)
txx9_cpu_clock = 300000000; /* 300MHz */
/* calculate gbus_clock and master_clock from cpu_clock */
cpuclk = txx9_cpu_clock;
divmode = (__u32)ccfg & TX4938_CCFG_DIVMODE_MASK;
switch (divmode) {
case TX4938_CCFG_DIVMODE_2:
case TX4938_CCFG_DIVMODE_8:
txx9_gbus_clock = cpuclk / 2; break;
case TX4938_CCFG_DIVMODE_2_5:
case TX4938_CCFG_DIVMODE_10:
txx9_gbus_clock = cpuclk * 2 / 5; break;
case TX4938_CCFG_DIVMODE_3:
case TX4938_CCFG_DIVMODE_12:
txx9_gbus_clock = cpuclk / 3; break;
case TX4938_CCFG_DIVMODE_4:
case TX4938_CCFG_DIVMODE_16:
txx9_gbus_clock = cpuclk / 4; break;
case TX4938_CCFG_DIVMODE_4_5:
case TX4938_CCFG_DIVMODE_18:
txx9_gbus_clock = cpuclk * 2 / 9; break;
}
switch (divmode) {
case TX4938_CCFG_DIVMODE_8:
case TX4938_CCFG_DIVMODE_10:
case TX4938_CCFG_DIVMODE_12:
case TX4938_CCFG_DIVMODE_16:
case TX4938_CCFG_DIVMODE_18:
txx9_master_clock = txx9_gbus_clock / 4; break;
default:
txx9_master_clock = txx9_gbus_clock;
}
}
/* change default value to udelay/mdelay take reasonable time */
loops_per_jiffy = txx9_cpu_clock / HZ / 2;
/* CCFG */
tx4938_wdr_init();
/* clear BusErrorOnWrite flag (W1C) */
tx4938_ccfg_set(TX4938_CCFG_BEOW);
/* enable Timeout BusError */
if (txx9_ccfg_toeon)
tx4938_ccfg_set(TX4938_CCFG_TOE);
/* DMA selection */
txx9_clear64(&tx4938_ccfgptr->pcfg, TX4938_PCFG_DMASEL_ALL);
/* Use external clock for external arbiter */
if (!(____raw_readq(&tx4938_ccfgptr->ccfg) & TX4938_CCFG_PCIARB))
txx9_clear64(&tx4938_ccfgptr->pcfg, TX4938_PCFG_PCICLKEN_ALL);
printk(KERN_INFO "%s -- %dMHz(M%dMHz) CRIR:%08x CCFG:%llx PCFG:%llx\n",
txx9_pcode_str,
(cpuclk + 500000) / 1000000,
(txx9_master_clock + 500000) / 1000000,
(__u32)____raw_readq(&tx4938_ccfgptr->crir),
(unsigned long long)____raw_readq(&tx4938_ccfgptr->ccfg),
(unsigned long long)____raw_readq(&tx4938_ccfgptr->pcfg));
printk(KERN_INFO "%s SDRAMC --", txx9_pcode_str);
for (i = 0; i < 4; i++) {
__u64 cr = TX4938_SDRAMC_CR(i);
unsigned long base, size;
if (!((__u32)cr & 0x00000400))
continue; /* disabled */
base = (unsigned long)(cr >> 49) << 21;
size = (((unsigned long)(cr >> 33) & 0x7fff) + 1) << 21;
printk(" CR%d:%016llx", i, (unsigned long long)cr);
tx4938_sdram_resource[i].name = "SDRAM";
tx4938_sdram_resource[i].start = base;
tx4938_sdram_resource[i].end = base + size - 1;
tx4938_sdram_resource[i].flags = IORESOURCE_MEM;
request_resource(&iomem_resource, &tx4938_sdram_resource[i]);
}
printk(" TR:%09llx\n",
(unsigned long long)____raw_readq(&tx4938_sdramcptr->tr));
/* SRAM */
if (txx9_pcode == 0x4938 && ____raw_readq(&tx4938_sramcptr->cr) & 1) {
unsigned int size = TX4938_SRAM_SIZE;
tx4938_sram_resource.name = "SRAM";
tx4938_sram_resource.start =
(____raw_readq(&tx4938_sramcptr->cr) >> (39-11))
& ~(size - 1);
tx4938_sram_resource.end =
tx4938_sram_resource.start + TX4938_SRAM_SIZE - 1;
tx4938_sram_resource.flags = IORESOURCE_MEM;
request_resource(&iomem_resource, &tx4938_sram_resource);
}
/* TMR */
/* disable all timers */
for (i = 0; i < TX4938_NR_TMR; i++)
txx9_tmr_init(TX4938_TMR_REG(i) & 0xfffffffffULL);
/* DMA */
for (i = 0; i < 2; i++)
____raw_writeq(TX4938_DMA_MCR_MSTEN,
(void __iomem *)(TX4938_DMA_REG(i) + 0x50));
/* PIO */
txx9_gpio_init(TX4938_PIO_REG & 0xfffffffffULL, 0, TX4938_NUM_PIO);
__raw_writel(0, &tx4938_pioptr->maskcpu);
__raw_writel(0, &tx4938_pioptr->maskext);
if (txx9_pcode == 0x4938) {
__u64 pcfg = ____raw_readq(&tx4938_ccfgptr->pcfg);
/* set PCIC1 reset */
txx9_set64(&tx4938_ccfgptr->clkctr, TX4938_CLKCTR_PCIC1RST);
if (pcfg & (TX4938_PCFG_ETH0_SEL | TX4938_PCFG_ETH1_SEL)) {
mdelay(1); /* at least 128 cpu clock */
/* clear PCIC1 reset */
txx9_clear64(&tx4938_ccfgptr->clkctr,
TX4938_CLKCTR_PCIC1RST);
} else {
printk(KERN_INFO "%s: stop PCIC1\n", txx9_pcode_str);
/* stop PCIC1 */
txx9_set64(&tx4938_ccfgptr->clkctr,
TX4938_CLKCTR_PCIC1CKD);
}
if (!(pcfg & TX4938_PCFG_ETH0_SEL)) {
printk(KERN_INFO "%s: stop ETH0\n", txx9_pcode_str);
txx9_set64(&tx4938_ccfgptr->clkctr,
TX4938_CLKCTR_ETH0RST);
txx9_set64(&tx4938_ccfgptr->clkctr,
TX4938_CLKCTR_ETH0CKD);
}
if (!(pcfg & TX4938_PCFG_ETH1_SEL)) {
printk(KERN_INFO "%s: stop ETH1\n", txx9_pcode_str);
txx9_set64(&tx4938_ccfgptr->clkctr,
TX4938_CLKCTR_ETH1RST);
txx9_set64(&tx4938_ccfgptr->clkctr,
TX4938_CLKCTR_ETH1CKD);
}
}
_machine_restart = tx4938_machine_restart;
board_be_init = tx4938_be_init;
}
void __init tx4938_time_init(unsigned int tmrnr)
{
if (____raw_readq(&tx4938_ccfgptr->ccfg) & TX4938_CCFG_TINTDIS)
txx9_clockevent_init(TX4938_TMR_REG(tmrnr) & 0xfffffffffULL,
TXX9_IRQ_BASE + TX4938_IR_TMR(tmrnr),
TXX9_IMCLK);
}
void __init tx4938_sio_init(unsigned int sclk, unsigned int cts_mask)
{
int i;
unsigned int ch_mask = 0;
if (__raw_readq(&tx4938_ccfgptr->pcfg) & TX4938_PCFG_ETH0_SEL)
ch_mask |= 1 << 1; /* disable SIO1 by PCFG setting */
for (i = 0; i < 2; i++) {
if ((1 << i) & ch_mask)
continue;
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;
}
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);
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