in txx9/generic/setup_tx4938.c [93:278]
void __init tx4938_setup(void)
{
int i;
__u32 divmode;
unsigned 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);
pr_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),
____raw_readq(&tx4938_ccfgptr->ccfg),
____raw_readq(&tx4938_ccfgptr->pcfg));
pr_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;
pr_cont(" CR%d:%016llx", i, 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]);
}
pr_cont(" TR:%09llx\n", ____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);
/* 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 {
pr_info("%s: stop PCIC1\n", txx9_pcode_str);
/* stop PCIC1 */
txx9_set64(&tx4938_ccfgptr->clkctr,
TX4938_CLKCTR_PCIC1CKD);
}
if (!(pcfg & TX4938_PCFG_ETH0_SEL)) {
pr_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)) {
pr_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;
}