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94a4c329 AN |
1 | /* |
2 | * TX4927 setup routines | |
3 | * Based on linux/arch/mips/txx9/rbtx4938/setup.c, | |
4 | * and RBTX49xx patch from CELF patch archive. | |
5 | * | |
6 | * 2003-2005 (c) MontaVista Software, Inc. | |
7 | * (C) Copyright TOSHIBA CORPORATION 2000-2001, 2004-2007 | |
8 | * | |
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 | |
11 | * for more details. | |
12 | */ | |
13 | #include <linux/init.h> | |
14 | #include <linux/ioport.h> | |
15 | #include <linux/delay.h> | |
94a4c329 AN |
16 | #include <linux/param.h> |
17 | #include <asm/txx9irq.h> | |
18 | #include <asm/txx9tmr.h> | |
19 | #include <asm/txx9pio.h> | |
20 | #include <asm/txx9/generic.h> | |
21 | #include <asm/txx9/tx4927.h> | |
22 | ||
68314725 | 23 | static void __init tx4927_wdr_init(void) |
94a4c329 AN |
24 | { |
25 | /* clear WatchDogReset (W1C) */ | |
26 | tx4927_ccfg_set(TX4927_CCFG_WDRST); | |
27 | /* do reset on watchdog */ | |
28 | tx4927_ccfg_set(TX4927_CCFG_WR); | |
29 | } | |
30 | ||
68314725 AN |
31 | void __init tx4927_wdt_init(void) |
32 | { | |
33 | txx9_wdt_init(TX4927_TMR_REG(2) & 0xfffffffffULL); | |
34 | } | |
35 | ||
94a4c329 AN |
36 | static struct resource tx4927_sdram_resource[4]; |
37 | ||
38 | void __init tx4927_setup(void) | |
39 | { | |
40 | int i; | |
41 | __u32 divmode; | |
42 | int cpuclk = 0; | |
43 | u64 ccfg; | |
44 | ||
45 | txx9_reg_res_init(TX4927_REV_PCODE(), TX4927_REG_BASE, | |
46 | TX4927_REG_SIZE); | |
47 | ||
48 | /* SDRAMC,EBUSC are configured by PROM */ | |
49 | for (i = 0; i < 8; i++) { | |
50 | if (!(TX4927_EBUSC_CR(i) & 0x8)) | |
51 | continue; /* disabled */ | |
52 | txx9_ce_res[i].start = (unsigned long)TX4927_EBUSC_BA(i); | |
53 | txx9_ce_res[i].end = | |
54 | txx9_ce_res[i].start + TX4927_EBUSC_SIZE(i) - 1; | |
55 | request_resource(&iomem_resource, &txx9_ce_res[i]); | |
56 | } | |
57 | ||
58 | /* clocks */ | |
59 | ccfg = ____raw_readq(&tx4927_ccfgptr->ccfg); | |
60 | if (txx9_master_clock) { | |
61 | /* calculate gbus_clock and cpu_clock from master_clock */ | |
62 | divmode = (__u32)ccfg & TX4927_CCFG_DIVMODE_MASK; | |
63 | switch (divmode) { | |
64 | case TX4927_CCFG_DIVMODE_8: | |
65 | case TX4927_CCFG_DIVMODE_10: | |
66 | case TX4927_CCFG_DIVMODE_12: | |
67 | case TX4927_CCFG_DIVMODE_16: | |
68 | txx9_gbus_clock = txx9_master_clock * 4; break; | |
69 | default: | |
70 | txx9_gbus_clock = txx9_master_clock; | |
71 | } | |
72 | switch (divmode) { | |
73 | case TX4927_CCFG_DIVMODE_2: | |
74 | case TX4927_CCFG_DIVMODE_8: | |
75 | cpuclk = txx9_gbus_clock * 2; break; | |
76 | case TX4927_CCFG_DIVMODE_2_5: | |
77 | case TX4927_CCFG_DIVMODE_10: | |
78 | cpuclk = txx9_gbus_clock * 5 / 2; break; | |
79 | case TX4927_CCFG_DIVMODE_3: | |
80 | case TX4927_CCFG_DIVMODE_12: | |
81 | cpuclk = txx9_gbus_clock * 3; break; | |
82 | case TX4927_CCFG_DIVMODE_4: | |
83 | case TX4927_CCFG_DIVMODE_16: | |
84 | cpuclk = txx9_gbus_clock * 4; break; | |
85 | } | |
86 | txx9_cpu_clock = cpuclk; | |
87 | } else { | |
88 | if (txx9_cpu_clock == 0) | |
89 | txx9_cpu_clock = 200000000; /* 200MHz */ | |
90 | /* calculate gbus_clock and master_clock from cpu_clock */ | |
91 | cpuclk = txx9_cpu_clock; | |
92 | divmode = (__u32)ccfg & TX4927_CCFG_DIVMODE_MASK; | |
93 | switch (divmode) { | |
94 | case TX4927_CCFG_DIVMODE_2: | |
95 | case TX4927_CCFG_DIVMODE_8: | |
96 | txx9_gbus_clock = cpuclk / 2; break; | |
97 | case TX4927_CCFG_DIVMODE_2_5: | |
98 | case TX4927_CCFG_DIVMODE_10: | |
99 | txx9_gbus_clock = cpuclk * 2 / 5; break; | |
100 | case TX4927_CCFG_DIVMODE_3: | |
101 | case TX4927_CCFG_DIVMODE_12: | |
102 | txx9_gbus_clock = cpuclk / 3; break; | |
103 | case TX4927_CCFG_DIVMODE_4: | |
104 | case TX4927_CCFG_DIVMODE_16: | |
105 | txx9_gbus_clock = cpuclk / 4; break; | |
106 | } | |
107 | switch (divmode) { | |
108 | case TX4927_CCFG_DIVMODE_8: | |
109 | case TX4927_CCFG_DIVMODE_10: | |
110 | case TX4927_CCFG_DIVMODE_12: | |
111 | case TX4927_CCFG_DIVMODE_16: | |
112 | txx9_master_clock = txx9_gbus_clock / 4; break; | |
113 | default: | |
114 | txx9_master_clock = txx9_gbus_clock; | |
115 | } | |
116 | } | |
117 | /* change default value to udelay/mdelay take reasonable time */ | |
118 | loops_per_jiffy = txx9_cpu_clock / HZ / 2; | |
119 | ||
120 | /* CCFG */ | |
121 | tx4927_wdr_init(); | |
122 | /* clear BusErrorOnWrite flag (W1C) */ | |
123 | tx4927_ccfg_set(TX4927_CCFG_BEOW); | |
124 | /* enable Timeout BusError */ | |
125 | if (txx9_ccfg_toeon) | |
126 | tx4927_ccfg_set(TX4927_CCFG_TOE); | |
127 | ||
128 | /* DMA selection */ | |
129 | txx9_clear64(&tx4927_ccfgptr->pcfg, TX4927_PCFG_DMASEL_ALL); | |
130 | ||
131 | /* Use external clock for external arbiter */ | |
132 | if (!(____raw_readq(&tx4927_ccfgptr->ccfg) & TX4927_CCFG_PCIARB)) | |
133 | txx9_clear64(&tx4927_ccfgptr->pcfg, TX4927_PCFG_PCICLKEN_ALL); | |
134 | ||
135 | printk(KERN_INFO "%s -- %dMHz(M%dMHz) CRIR:%08x CCFG:%llx PCFG:%llx\n", | |
136 | txx9_pcode_str, | |
137 | (cpuclk + 500000) / 1000000, | |
138 | (txx9_master_clock + 500000) / 1000000, | |
139 | (__u32)____raw_readq(&tx4927_ccfgptr->crir), | |
140 | (unsigned long long)____raw_readq(&tx4927_ccfgptr->ccfg), | |
141 | (unsigned long long)____raw_readq(&tx4927_ccfgptr->pcfg)); | |
142 | ||
143 | printk(KERN_INFO "%s SDRAMC --", txx9_pcode_str); | |
144 | for (i = 0; i < 4; i++) { | |
145 | __u64 cr = TX4927_SDRAMC_CR(i); | |
146 | unsigned long base, size; | |
147 | if (!((__u32)cr & 0x00000400)) | |
148 | continue; /* disabled */ | |
149 | base = (unsigned long)(cr >> 49) << 21; | |
150 | size = (((unsigned long)(cr >> 33) & 0x7fff) + 1) << 21; | |
151 | printk(" CR%d:%016llx", i, (unsigned long long)cr); | |
152 | tx4927_sdram_resource[i].name = "SDRAM"; | |
153 | tx4927_sdram_resource[i].start = base; | |
154 | tx4927_sdram_resource[i].end = base + size - 1; | |
155 | tx4927_sdram_resource[i].flags = IORESOURCE_MEM; | |
156 | request_resource(&iomem_resource, &tx4927_sdram_resource[i]); | |
157 | } | |
158 | printk(" TR:%09llx\n", | |
159 | (unsigned long long)____raw_readq(&tx4927_sdramcptr->tr)); | |
160 | ||
161 | /* TMR */ | |
162 | /* disable all timers */ | |
163 | for (i = 0; i < TX4927_NR_TMR; i++) | |
164 | txx9_tmr_init(TX4927_TMR_REG(i) & 0xfffffffffULL); | |
165 | ||
166 | /* PIO */ | |
167 | txx9_gpio_init(TX4927_PIO_REG & 0xfffffffffULL, 0, TX4927_NUM_PIO); | |
168 | __raw_writel(0, &tx4927_pioptr->maskcpu); | |
169 | __raw_writel(0, &tx4927_pioptr->maskext); | |
170 | } | |
171 | ||
172 | void __init tx4927_time_init(unsigned int tmrnr) | |
173 | { | |
174 | if (____raw_readq(&tx4927_ccfgptr->ccfg) & TX4927_CCFG_TINTDIS) | |
175 | txx9_clockevent_init(TX4927_TMR_REG(tmrnr) & 0xfffffffffULL, | |
176 | TXX9_IRQ_BASE + TX4927_IR_TMR(tmrnr), | |
177 | TXX9_IMCLK); | |
178 | } | |
179 | ||
7779a5e0 | 180 | void __init tx4927_sio_init(unsigned int sclk, unsigned int cts_mask) |
94a4c329 | 181 | { |
94a4c329 | 182 | int i; |
7779a5e0 AN |
183 | |
184 | for (i = 0; i < 2; i++) | |
185 | txx9_sio_init(TX4927_SIO_REG(i) & 0xfffffffffULL, | |
186 | TXX9_IRQ_BASE + TX4927_IR_SIO(i), | |
187 | i, sclk, (1 << i) & cts_mask); | |
94a4c329 | 188 | } |