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 static 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 void __init tx4938_wdt_init(void)
34 txx9_wdt_init(TX4938_TMR_REG(2) & 0xfffffffffULL);
37 static struct resource tx4938_sdram_resource[4];
38 static struct resource tx4938_sram_resource;
40 #define TX4938_SRAM_SIZE 0x800
42 void __init tx4938_setup(void)
49 txx9_reg_res_init(TX4938_REV_PCODE(), TX4938_REG_BASE,
52 /* SDRAMC,EBUSC are configured by PROM */
53 for (i = 0; i < 8; i++) {
54 if (!(TX4938_EBUSC_CR(i) & 0x8))
55 continue; /* disabled */
56 txx9_ce_res[i].start = (unsigned long)TX4938_EBUSC_BA(i);
58 txx9_ce_res[i].start + TX4938_EBUSC_SIZE(i) - 1;
59 request_resource(&iomem_resource, &txx9_ce_res[i]);
63 ccfg = ____raw_readq(&tx4938_ccfgptr->ccfg);
64 if (txx9_master_clock) {
65 /* calculate gbus_clock and cpu_clock from master_clock */
66 divmode = (__u32)ccfg & TX4938_CCFG_DIVMODE_MASK;
68 case TX4938_CCFG_DIVMODE_8:
69 case TX4938_CCFG_DIVMODE_10:
70 case TX4938_CCFG_DIVMODE_12:
71 case TX4938_CCFG_DIVMODE_16:
72 case TX4938_CCFG_DIVMODE_18:
73 txx9_gbus_clock = txx9_master_clock * 4; break;
75 txx9_gbus_clock = txx9_master_clock;
78 case TX4938_CCFG_DIVMODE_2:
79 case TX4938_CCFG_DIVMODE_8:
80 cpuclk = txx9_gbus_clock * 2; break;
81 case TX4938_CCFG_DIVMODE_2_5:
82 case TX4938_CCFG_DIVMODE_10:
83 cpuclk = txx9_gbus_clock * 5 / 2; break;
84 case TX4938_CCFG_DIVMODE_3:
85 case TX4938_CCFG_DIVMODE_12:
86 cpuclk = txx9_gbus_clock * 3; break;
87 case TX4938_CCFG_DIVMODE_4:
88 case TX4938_CCFG_DIVMODE_16:
89 cpuclk = txx9_gbus_clock * 4; break;
90 case TX4938_CCFG_DIVMODE_4_5:
91 case TX4938_CCFG_DIVMODE_18:
92 cpuclk = txx9_gbus_clock * 9 / 2; break;
94 txx9_cpu_clock = cpuclk;
96 if (txx9_cpu_clock == 0)
97 txx9_cpu_clock = 300000000; /* 300MHz */
98 /* calculate gbus_clock and master_clock from cpu_clock */
99 cpuclk = txx9_cpu_clock;
100 divmode = (__u32)ccfg & TX4938_CCFG_DIVMODE_MASK;
102 case TX4938_CCFG_DIVMODE_2:
103 case TX4938_CCFG_DIVMODE_8:
104 txx9_gbus_clock = cpuclk / 2; break;
105 case TX4938_CCFG_DIVMODE_2_5:
106 case TX4938_CCFG_DIVMODE_10:
107 txx9_gbus_clock = cpuclk * 2 / 5; break;
108 case TX4938_CCFG_DIVMODE_3:
109 case TX4938_CCFG_DIVMODE_12:
110 txx9_gbus_clock = cpuclk / 3; break;
111 case TX4938_CCFG_DIVMODE_4:
112 case TX4938_CCFG_DIVMODE_16:
113 txx9_gbus_clock = cpuclk / 4; break;
114 case TX4938_CCFG_DIVMODE_4_5:
115 case TX4938_CCFG_DIVMODE_18:
116 txx9_gbus_clock = cpuclk * 2 / 9; break;
119 case TX4938_CCFG_DIVMODE_8:
120 case TX4938_CCFG_DIVMODE_10:
121 case TX4938_CCFG_DIVMODE_12:
122 case TX4938_CCFG_DIVMODE_16:
123 case TX4938_CCFG_DIVMODE_18:
124 txx9_master_clock = txx9_gbus_clock / 4; break;
126 txx9_master_clock = txx9_gbus_clock;
129 /* change default value to udelay/mdelay take reasonable time */
130 loops_per_jiffy = txx9_cpu_clock / HZ / 2;
134 /* clear BusErrorOnWrite flag (W1C) */
135 tx4938_ccfg_set(TX4938_CCFG_BEOW);
136 /* enable Timeout BusError */
138 tx4938_ccfg_set(TX4938_CCFG_TOE);
141 txx9_clear64(&tx4938_ccfgptr->pcfg, TX4938_PCFG_DMASEL_ALL);
143 /* Use external clock for external arbiter */
144 if (!(____raw_readq(&tx4938_ccfgptr->ccfg) & TX4938_CCFG_PCIARB))
145 txx9_clear64(&tx4938_ccfgptr->pcfg, TX4938_PCFG_PCICLKEN_ALL);
147 printk(KERN_INFO "%s -- %dMHz(M%dMHz) CRIR:%08x CCFG:%llx PCFG:%llx\n",
149 (cpuclk + 500000) / 1000000,
150 (txx9_master_clock + 500000) / 1000000,
151 (__u32)____raw_readq(&tx4938_ccfgptr->crir),
152 (unsigned long long)____raw_readq(&tx4938_ccfgptr->ccfg),
153 (unsigned long long)____raw_readq(&tx4938_ccfgptr->pcfg));
155 printk(KERN_INFO "%s SDRAMC --", txx9_pcode_str);
156 for (i = 0; i < 4; i++) {
157 __u64 cr = TX4938_SDRAMC_CR(i);
158 unsigned long base, size;
159 if (!((__u32)cr & 0x00000400))
160 continue; /* disabled */
161 base = (unsigned long)(cr >> 49) << 21;
162 size = (((unsigned long)(cr >> 33) & 0x7fff) + 1) << 21;
163 printk(" CR%d:%016llx", i, (unsigned long long)cr);
164 tx4938_sdram_resource[i].name = "SDRAM";
165 tx4938_sdram_resource[i].start = base;
166 tx4938_sdram_resource[i].end = base + size - 1;
167 tx4938_sdram_resource[i].flags = IORESOURCE_MEM;
168 request_resource(&iomem_resource, &tx4938_sdram_resource[i]);
170 printk(" TR:%09llx\n",
171 (unsigned long long)____raw_readq(&tx4938_sdramcptr->tr));
174 if (txx9_pcode == 0x4938 && ____raw_readq(&tx4938_sramcptr->cr) & 1) {
175 unsigned int size = TX4938_SRAM_SIZE;
176 tx4938_sram_resource.name = "SRAM";
177 tx4938_sram_resource.start =
178 (____raw_readq(&tx4938_sramcptr->cr) >> (39-11))
180 tx4938_sram_resource.end =
181 tx4938_sram_resource.start + TX4938_SRAM_SIZE - 1;
182 tx4938_sram_resource.flags = IORESOURCE_MEM;
183 request_resource(&iomem_resource, &tx4938_sram_resource);
187 /* disable all timers */
188 for (i = 0; i < TX4938_NR_TMR; i++)
189 txx9_tmr_init(TX4938_TMR_REG(i) & 0xfffffffffULL);
192 for (i = 0; i < 2; i++)
193 ____raw_writeq(TX4938_DMA_MCR_MSTEN,
194 (void __iomem *)(TX4938_DMA_REG(i) + 0x50));
197 txx9_gpio_init(TX4938_PIO_REG & 0xfffffffffULL, 0, TX4938_NUM_PIO);
198 __raw_writel(0, &tx4938_pioptr->maskcpu);
199 __raw_writel(0, &tx4938_pioptr->maskext);
201 if (txx9_pcode == 0x4938) {
202 __u64 pcfg = ____raw_readq(&tx4938_ccfgptr->pcfg);
203 /* set PCIC1 reset */
204 txx9_set64(&tx4938_ccfgptr->clkctr, TX4938_CLKCTR_PCIC1RST);
205 if (pcfg & (TX4938_PCFG_ETH0_SEL | TX4938_PCFG_ETH1_SEL)) {
206 mdelay(1); /* at least 128 cpu clock */
207 /* clear PCIC1 reset */
208 txx9_clear64(&tx4938_ccfgptr->clkctr,
209 TX4938_CLKCTR_PCIC1RST);
211 printk(KERN_INFO "%s: stop PCIC1\n", txx9_pcode_str);
213 txx9_set64(&tx4938_ccfgptr->clkctr,
214 TX4938_CLKCTR_PCIC1CKD);
216 if (!(pcfg & TX4938_PCFG_ETH0_SEL)) {
217 printk(KERN_INFO "%s: stop ETH0\n", txx9_pcode_str);
218 txx9_set64(&tx4938_ccfgptr->clkctr,
219 TX4938_CLKCTR_ETH0RST);
220 txx9_set64(&tx4938_ccfgptr->clkctr,
221 TX4938_CLKCTR_ETH0CKD);
223 if (!(pcfg & TX4938_PCFG_ETH1_SEL)) {
224 printk(KERN_INFO "%s: stop ETH1\n", txx9_pcode_str);
225 txx9_set64(&tx4938_ccfgptr->clkctr,
226 TX4938_CLKCTR_ETH1RST);
227 txx9_set64(&tx4938_ccfgptr->clkctr,
228 TX4938_CLKCTR_ETH1CKD);
233 void __init tx4938_time_init(unsigned int tmrnr)
235 if (____raw_readq(&tx4938_ccfgptr->ccfg) & TX4938_CCFG_TINTDIS)
236 txx9_clockevent_init(TX4938_TMR_REG(tmrnr) & 0xfffffffffULL,
237 TXX9_IRQ_BASE + TX4938_IR_TMR(tmrnr),
241 void __init tx4938_setup_serial(void)
243 #ifdef CONFIG_SERIAL_TXX9
245 struct uart_port req;
246 unsigned int ch_mask = 0;
248 if (__raw_readq(&tx4938_ccfgptr->pcfg) & TX4938_PCFG_ETH0_SEL)
249 ch_mask |= 1 << 1; /* disable SIO1 by PCFG setting */
250 for (i = 0; i < 2; i++) {
251 if ((1 << i) & ch_mask)
253 memset(&req, 0, sizeof(req));
255 req.iotype = UPIO_MEM;
256 req.membase = (unsigned char __iomem *)TX4938_SIO_REG(i);
257 req.mapbase = TX4938_SIO_REG(i) & 0xfffffffffULL;
258 req.irq = TXX9_IRQ_BASE + TX4938_IR_SIO(i);
259 req.flags |= UPF_BUGGY_UART /*HAVE_CTS_LINE*/;
260 req.uartclk = TXX9_IMCLK;
261 early_serial_txx9_setup(&req);
263 #endif /* CONFIG_SERIAL_TXX9 */