2 * TX4938/4937 setup routines
3 * Based on linux/arch/mips/txx9/rbtx4938/setup.c,
4 * and RBTX49xx patch from CELF patch archive.
6 * 2003-2005 (c) MontaVista Software, Inc.
7 * (C) Copyright TOSHIBA CORPORATION 2000-2001, 2004-2007
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/serial_core.h>
17 #include <linux/param.h>
18 #include <asm/txx9irq.h>
19 #include <asm/txx9tmr.h>
20 #include <asm/txx9pio.h>
21 #include <asm/txx9/generic.h>
22 #include <asm/txx9/tx4938.h>
24 void __init tx4938_wdr_init(void)
26 /* clear WatchDogReset (W1C) */
27 tx4938_ccfg_set(TX4938_CCFG_WDRST);
28 /* do reset on watchdog */
29 tx4938_ccfg_set(TX4938_CCFG_WR);
32 static struct resource tx4938_sdram_resource[4];
33 static struct resource tx4938_sram_resource;
35 #define TX4938_SRAM_SIZE 0x800
37 void __init tx4938_setup(void)
44 txx9_reg_res_init(TX4938_REV_PCODE(), TX4938_REG_BASE,
47 /* SDRAMC,EBUSC are configured by PROM */
48 for (i = 0; i < 8; i++) {
49 if (!(TX4938_EBUSC_CR(i) & 0x8))
50 continue; /* disabled */
51 txx9_ce_res[i].start = (unsigned long)TX4938_EBUSC_BA(i);
53 txx9_ce_res[i].start + TX4938_EBUSC_SIZE(i) - 1;
54 request_resource(&iomem_resource, &txx9_ce_res[i]);
58 ccfg = ____raw_readq(&tx4938_ccfgptr->ccfg);
59 if (txx9_master_clock) {
60 /* calculate gbus_clock and cpu_clock from master_clock */
61 divmode = (__u32)ccfg & TX4938_CCFG_DIVMODE_MASK;
63 case TX4938_CCFG_DIVMODE_8:
64 case TX4938_CCFG_DIVMODE_10:
65 case TX4938_CCFG_DIVMODE_12:
66 case TX4938_CCFG_DIVMODE_16:
67 case TX4938_CCFG_DIVMODE_18:
68 txx9_gbus_clock = txx9_master_clock * 4; break;
70 txx9_gbus_clock = txx9_master_clock;
73 case TX4938_CCFG_DIVMODE_2:
74 case TX4938_CCFG_DIVMODE_8:
75 cpuclk = txx9_gbus_clock * 2; break;
76 case TX4938_CCFG_DIVMODE_2_5:
77 case TX4938_CCFG_DIVMODE_10:
78 cpuclk = txx9_gbus_clock * 5 / 2; break;
79 case TX4938_CCFG_DIVMODE_3:
80 case TX4938_CCFG_DIVMODE_12:
81 cpuclk = txx9_gbus_clock * 3; break;
82 case TX4938_CCFG_DIVMODE_4:
83 case TX4938_CCFG_DIVMODE_16:
84 cpuclk = txx9_gbus_clock * 4; break;
85 case TX4938_CCFG_DIVMODE_4_5:
86 case TX4938_CCFG_DIVMODE_18:
87 cpuclk = txx9_gbus_clock * 9 / 2; break;
89 txx9_cpu_clock = cpuclk;
91 if (txx9_cpu_clock == 0)
92 txx9_cpu_clock = 300000000; /* 300MHz */
93 /* calculate gbus_clock and master_clock from cpu_clock */
94 cpuclk = txx9_cpu_clock;
95 divmode = (__u32)ccfg & TX4938_CCFG_DIVMODE_MASK;
97 case TX4938_CCFG_DIVMODE_2:
98 case TX4938_CCFG_DIVMODE_8:
99 txx9_gbus_clock = cpuclk / 2; break;
100 case TX4938_CCFG_DIVMODE_2_5:
101 case TX4938_CCFG_DIVMODE_10:
102 txx9_gbus_clock = cpuclk * 2 / 5; break;
103 case TX4938_CCFG_DIVMODE_3:
104 case TX4938_CCFG_DIVMODE_12:
105 txx9_gbus_clock = cpuclk / 3; break;
106 case TX4938_CCFG_DIVMODE_4:
107 case TX4938_CCFG_DIVMODE_16:
108 txx9_gbus_clock = cpuclk / 4; break;
109 case TX4938_CCFG_DIVMODE_4_5:
110 case TX4938_CCFG_DIVMODE_18:
111 txx9_gbus_clock = cpuclk * 2 / 9; break;
114 case TX4938_CCFG_DIVMODE_8:
115 case TX4938_CCFG_DIVMODE_10:
116 case TX4938_CCFG_DIVMODE_12:
117 case TX4938_CCFG_DIVMODE_16:
118 case TX4938_CCFG_DIVMODE_18:
119 txx9_master_clock = txx9_gbus_clock / 4; break;
121 txx9_master_clock = txx9_gbus_clock;
124 /* change default value to udelay/mdelay take reasonable time */
125 loops_per_jiffy = txx9_cpu_clock / HZ / 2;
129 /* clear BusErrorOnWrite flag (W1C) */
130 tx4938_ccfg_set(TX4938_CCFG_BEOW);
131 /* enable Timeout BusError */
133 tx4938_ccfg_set(TX4938_CCFG_TOE);
136 txx9_clear64(&tx4938_ccfgptr->pcfg, TX4938_PCFG_DMASEL_ALL);
138 /* Use external clock for external arbiter */
139 if (!(____raw_readq(&tx4938_ccfgptr->ccfg) & TX4938_CCFG_PCIARB))
140 txx9_clear64(&tx4938_ccfgptr->pcfg, TX4938_PCFG_PCICLKEN_ALL);
142 printk(KERN_INFO "%s -- %dMHz(M%dMHz) CRIR:%08x CCFG:%llx PCFG:%llx\n",
144 (cpuclk + 500000) / 1000000,
145 (txx9_master_clock + 500000) / 1000000,
146 (__u32)____raw_readq(&tx4938_ccfgptr->crir),
147 (unsigned long long)____raw_readq(&tx4938_ccfgptr->ccfg),
148 (unsigned long long)____raw_readq(&tx4938_ccfgptr->pcfg));
150 printk(KERN_INFO "%s SDRAMC --", txx9_pcode_str);
151 for (i = 0; i < 4; i++) {
152 __u64 cr = TX4938_SDRAMC_CR(i);
153 unsigned long base, size;
154 if (!((__u32)cr & 0x00000400))
155 continue; /* disabled */
156 base = (unsigned long)(cr >> 49) << 21;
157 size = (((unsigned long)(cr >> 33) & 0x7fff) + 1) << 21;
158 printk(" CR%d:%016llx", i, (unsigned long long)cr);
159 tx4938_sdram_resource[i].name = "SDRAM";
160 tx4938_sdram_resource[i].start = base;
161 tx4938_sdram_resource[i].end = base + size - 1;
162 tx4938_sdram_resource[i].flags = IORESOURCE_MEM;
163 request_resource(&iomem_resource, &tx4938_sdram_resource[i]);
165 printk(" TR:%09llx\n",
166 (unsigned long long)____raw_readq(&tx4938_sdramcptr->tr));
169 if (txx9_pcode == 0x4938 && ____raw_readq(&tx4938_sramcptr->cr) & 1) {
170 unsigned int size = TX4938_SRAM_SIZE;
171 tx4938_sram_resource.name = "SRAM";
172 tx4938_sram_resource.start =
173 (____raw_readq(&tx4938_sramcptr->cr) >> (39-11))
175 tx4938_sram_resource.end =
176 tx4938_sram_resource.start + TX4938_SRAM_SIZE - 1;
177 tx4938_sram_resource.flags = IORESOURCE_MEM;
178 request_resource(&iomem_resource, &tx4938_sram_resource);
182 /* disable all timers */
183 for (i = 0; i < TX4938_NR_TMR; i++)
184 txx9_tmr_init(TX4938_TMR_REG(i) & 0xfffffffffULL);
187 for (i = 0; i < 2; i++)
188 ____raw_writeq(TX4938_DMA_MCR_MSTEN,
189 (void __iomem *)(TX4938_DMA_REG(i) + 0x50));
192 txx9_gpio_init(TX4938_PIO_REG & 0xfffffffffULL, 0, TX4938_NUM_PIO);
193 __raw_writel(0, &tx4938_pioptr->maskcpu);
194 __raw_writel(0, &tx4938_pioptr->maskext);
196 if (txx9_pcode == 0x4938) {
197 __u64 pcfg = ____raw_readq(&tx4938_ccfgptr->pcfg);
198 /* set PCIC1 reset */
199 txx9_set64(&tx4938_ccfgptr->clkctr, TX4938_CLKCTR_PCIC1RST);
200 if (pcfg & (TX4938_PCFG_ETH0_SEL | TX4938_PCFG_ETH1_SEL)) {
201 mdelay(1); /* at least 128 cpu clock */
202 /* clear PCIC1 reset */
203 txx9_clear64(&tx4938_ccfgptr->clkctr,
204 TX4938_CLKCTR_PCIC1RST);
206 printk(KERN_INFO "%s: stop PCIC1\n", txx9_pcode_str);
208 txx9_set64(&tx4938_ccfgptr->clkctr,
209 TX4938_CLKCTR_PCIC1CKD);
211 if (!(pcfg & TX4938_PCFG_ETH0_SEL)) {
212 printk(KERN_INFO "%s: stop ETH0\n", txx9_pcode_str);
213 txx9_set64(&tx4938_ccfgptr->clkctr,
214 TX4938_CLKCTR_ETH0RST);
215 txx9_set64(&tx4938_ccfgptr->clkctr,
216 TX4938_CLKCTR_ETH0CKD);
218 if (!(pcfg & TX4938_PCFG_ETH1_SEL)) {
219 printk(KERN_INFO "%s: stop ETH1\n", txx9_pcode_str);
220 txx9_set64(&tx4938_ccfgptr->clkctr,
221 TX4938_CLKCTR_ETH1RST);
222 txx9_set64(&tx4938_ccfgptr->clkctr,
223 TX4938_CLKCTR_ETH1CKD);
228 void __init tx4938_time_init(unsigned int tmrnr)
230 if (____raw_readq(&tx4938_ccfgptr->ccfg) & TX4938_CCFG_TINTDIS)
231 txx9_clockevent_init(TX4938_TMR_REG(tmrnr) & 0xfffffffffULL,
232 TXX9_IRQ_BASE + TX4938_IR_TMR(tmrnr),
236 void __init tx4938_setup_serial(void)
238 #ifdef CONFIG_SERIAL_TXX9
240 struct uart_port req;
241 unsigned int ch_mask = 0;
243 if (__raw_readq(&tx4938_ccfgptr->pcfg) & TX4938_PCFG_ETH0_SEL)
244 ch_mask |= 1 << 1; /* disable SIO1 by PCFG setting */
245 for (i = 0; i < 2; i++) {
246 if ((1 << i) & ch_mask)
248 memset(&req, 0, sizeof(req));
250 req.iotype = UPIO_MEM;
251 req.membase = (unsigned char __iomem *)TX4938_SIO_REG(i);
252 req.mapbase = TX4938_SIO_REG(i) & 0xfffffffffULL;
253 req.irq = TXX9_IRQ_BASE + TX4938_IR_SIO(i);
254 req.flags |= UPF_BUGGY_UART /*HAVE_CTS_LINE*/;
255 req.uartclk = TXX9_IMCLK;
256 early_serial_txx9_setup(&req);
258 #endif /* CONFIG_SERIAL_TXX9 */