2 * TX3927 setup routines
3 * Based on linux/arch/mips/txx9/jmr3927/setup.c
5 * Copyright 2001 MontaVista Software Inc.
6 * Copyright (C) 2000-2001 Toshiba Corporation
7 * Copyright (C) 2007 Ralf Baechle (ralf@linux-mips.org)
9 * This file is subject to the terms and conditions of the GNU General Public
10 * License. See the file "COPYING" in the main directory of this archive
13 #include <linux/init.h>
14 #include <linux/ioport.h>
15 #include <linux/delay.h>
16 #include <linux/param.h>
18 #include <asm/mipsregs.h>
19 #include <asm/txx9irq.h>
20 #include <asm/txx9tmr.h>
21 #include <asm/txx9pio.h>
22 #include <asm/txx9/generic.h>
23 #include <asm/txx9/tx3927.h>
25 void __init tx3927_wdt_init(void)
27 txx9_wdt_init(TX3927_TMR_REG(2));
30 void __init tx3927_setup(void)
35 /* don't enable - see errata */
37 if (strstr(prom_getcmdline(), "toeon") != NULL)
40 txx9_reg_res_init(TX3927_REV_PCODE(), TX3927_REG_BASE,
43 /* SDRAMC,ROMC are configured by PROM */
44 for (i = 0; i < 8; i++) {
45 if (!(tx3927_romcptr->cr[i] & 0x8))
46 continue; /* disabled */
47 txx9_ce_res[i].start = (unsigned long)TX3927_ROMC_BA(i);
49 txx9_ce_res[i].start + TX3927_ROMC_SIZE(i) - 1;
50 request_resource(&iomem_resource, &txx9_ce_res[i]);
54 txx9_gbus_clock = txx9_cpu_clock / 2;
55 /* change default value to udelay/mdelay take reasonable time */
56 loops_per_jiffy = txx9_cpu_clock / HZ / 2;
59 /* enable Timeout BusError */
61 tx3927_ccfgptr->ccfg |= TX3927_CCFG_TOE;
63 /* clear BusErrorOnWrite flag */
64 tx3927_ccfgptr->ccfg &= ~TX3927_CCFG_BEOW;
65 if (read_c0_conf() & TX39_CONF_WBON)
66 /* Disable PCI snoop */
67 tx3927_ccfgptr->ccfg &= ~TX3927_CCFG_PSNP;
69 /* Enable PCI SNOOP - with write through only */
70 tx3927_ccfgptr->ccfg |= TX3927_CCFG_PSNP;
71 /* do reset on watchdog */
72 tx3927_ccfgptr->ccfg |= TX3927_CCFG_WR;
74 printk(KERN_INFO "TX3927 -- CRIR:%08lx CCFG:%08lx PCFG:%08lx\n",
76 tx3927_ccfgptr->ccfg, tx3927_ccfgptr->pcfg);
79 for (i = 0; i < TX3927_NR_TMR; i++)
80 txx9_tmr_init(TX3927_TMR_REG(i));
83 tx3927_dmaptr->mcr = 0;
84 for (i = 0; i < ARRAY_SIZE(tx3927_dmaptr->ch); i++) {
86 tx3927_dmaptr->ch[i].ccr = TX3927_DMA_CCR_CHRST;
87 tx3927_dmaptr->ch[i].ccr = 0;
91 tx3927_dmaptr->mcr = TX3927_DMA_MCR_MSTEN;
93 tx3927_dmaptr->mcr = TX3927_DMA_MCR_MSTEN | TX3927_DMA_MCR_LE;
97 __raw_writel(0, &tx3927_pioptr->maskcpu);
98 __raw_writel(0, &tx3927_pioptr->maskext);
99 txx9_gpio_init(TX3927_PIO_REG, 0, 16);
101 conf = read_c0_conf();
102 if (!(conf & TX39_CONF_ICE))
103 printk(KERN_INFO "TX3927 I-Cache disabled.\n");
104 if (!(conf & TX39_CONF_DCE))
105 printk(KERN_INFO "TX3927 D-Cache disabled.\n");
106 else if (!(conf & TX39_CONF_WBON))
107 printk(KERN_INFO "TX3927 D-Cache WriteThrough.\n");
108 else if (!(conf & TX39_CONF_CWFON))
109 printk(KERN_INFO "TX3927 D-Cache WriteBack.\n");
111 printk(KERN_INFO "TX3927 D-Cache WriteBack (CWF) .\n");
114 void __init tx3927_time_init(unsigned int evt_tmrnr, unsigned int src_tmrnr)
116 txx9_clockevent_init(TX3927_TMR_REG(evt_tmrnr),
117 TXX9_IRQ_BASE + TX3927_IR_TMR(evt_tmrnr),
119 txx9_clocksource_init(TX3927_TMR_REG(src_tmrnr), TXX9_IMCLK);
122 void __init tx3927_sio_init(unsigned int sclk, unsigned int cts_mask)
126 for (i = 0; i < 2; i++)
127 txx9_sio_init(TX3927_SIO_REG(i),
128 TXX9_IRQ_BASE + TX3927_IR_SIO(i),
129 i, sclk, (1 << i) & cts_mask);