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/param.h>
17 #include <linux/ptrace.h>
18 #include <linux/mtd/physmap.h>
19 #include <asm/reboot.h>
20 #include <asm/traps.h>
21 #include <asm/txx9irq.h>
22 #include <asm/txx9tmr.h>
23 #include <asm/txx9pio.h>
24 #include <asm/txx9/generic.h>
25 #include <asm/txx9/tx4938.h>
27 static void __init tx4938_wdr_init(void)
29 /* report watchdog reset status */
30 if (____raw_readq(&tx4938_ccfgptr->ccfg) & TX4938_CCFG_WDRST)
31 pr_warning("Watchdog reset detected at 0x%lx\n",
33 /* clear WatchDogReset (W1C) */
34 tx4938_ccfg_set(TX4938_CCFG_WDRST);
35 /* do reset on watchdog */
36 tx4938_ccfg_set(TX4938_CCFG_WR);
39 void __init tx4938_wdt_init(void)
41 txx9_wdt_init(TX4938_TMR_REG(2) & 0xfffffffffULL);
44 static void tx4938_machine_restart(char *command)
47 pr_emerg("Rebooting (with %s watchdog reset)...\n",
48 (____raw_readq(&tx4938_ccfgptr->ccfg) & TX4938_CCFG_WDREXEN) ?
49 "external" : "internal");
50 /* clear watchdog status */
51 tx4938_ccfg_set(TX4938_CCFG_WDRST); /* W1C */
52 txx9_wdt_now(TX4938_TMR_REG(2) & 0xfffffffffULL);
53 while (!(____raw_readq(&tx4938_ccfgptr->ccfg) & TX4938_CCFG_WDRST))
56 if (____raw_readq(&tx4938_ccfgptr->ccfg) & TX4938_CCFG_WDREXEN) {
57 pr_emerg("Rebooting (with internal watchdog reset)...\n");
58 /* External WDRST failed. Do internal watchdog reset */
59 tx4938_ccfg_clear(TX4938_CCFG_WDREXEN);
65 void show_registers(struct pt_regs *regs);
66 static int tx4938_be_handler(struct pt_regs *regs, int is_fixup)
68 int data = regs->cp0_cause & 4;
70 pr_err("%cBE exception at %#lx\n", data ? 'D' : 'I', regs->cp0_epc);
71 pr_err("ccfg:%llx, toea:%llx\n",
72 (unsigned long long)____raw_readq(&tx4938_ccfgptr->ccfg),
73 (unsigned long long)____raw_readq(&tx4938_ccfgptr->toea));
75 tx4927_report_pcic_status();
80 static void __init tx4938_be_init(void)
82 board_be_handler = tx4938_be_handler;
85 static struct resource tx4938_sdram_resource[4];
86 static struct resource tx4938_sram_resource;
88 #define TX4938_SRAM_SIZE 0x800
90 void __init tx4938_setup(void)
97 txx9_reg_res_init(TX4938_REV_PCODE(), TX4938_REG_BASE,
99 set_c0_config(TX49_CONF_CWFON);
101 /* SDRAMC,EBUSC are configured by PROM */
102 for (i = 0; i < 8; i++) {
103 if (!(TX4938_EBUSC_CR(i) & 0x8))
104 continue; /* disabled */
105 txx9_ce_res[i].start = (unsigned long)TX4938_EBUSC_BA(i);
107 txx9_ce_res[i].start + TX4938_EBUSC_SIZE(i) - 1;
108 request_resource(&iomem_resource, &txx9_ce_res[i]);
112 ccfg = ____raw_readq(&tx4938_ccfgptr->ccfg);
113 if (txx9_master_clock) {
114 /* calculate gbus_clock and cpu_clock from master_clock */
115 divmode = (__u32)ccfg & TX4938_CCFG_DIVMODE_MASK;
117 case TX4938_CCFG_DIVMODE_8:
118 case TX4938_CCFG_DIVMODE_10:
119 case TX4938_CCFG_DIVMODE_12:
120 case TX4938_CCFG_DIVMODE_16:
121 case TX4938_CCFG_DIVMODE_18:
122 txx9_gbus_clock = txx9_master_clock * 4; break;
124 txx9_gbus_clock = txx9_master_clock;
127 case TX4938_CCFG_DIVMODE_2:
128 case TX4938_CCFG_DIVMODE_8:
129 cpuclk = txx9_gbus_clock * 2; break;
130 case TX4938_CCFG_DIVMODE_2_5:
131 case TX4938_CCFG_DIVMODE_10:
132 cpuclk = txx9_gbus_clock * 5 / 2; break;
133 case TX4938_CCFG_DIVMODE_3:
134 case TX4938_CCFG_DIVMODE_12:
135 cpuclk = txx9_gbus_clock * 3; break;
136 case TX4938_CCFG_DIVMODE_4:
137 case TX4938_CCFG_DIVMODE_16:
138 cpuclk = txx9_gbus_clock * 4; break;
139 case TX4938_CCFG_DIVMODE_4_5:
140 case TX4938_CCFG_DIVMODE_18:
141 cpuclk = txx9_gbus_clock * 9 / 2; break;
143 txx9_cpu_clock = cpuclk;
145 if (txx9_cpu_clock == 0)
146 txx9_cpu_clock = 300000000; /* 300MHz */
147 /* calculate gbus_clock and master_clock from cpu_clock */
148 cpuclk = txx9_cpu_clock;
149 divmode = (__u32)ccfg & TX4938_CCFG_DIVMODE_MASK;
151 case TX4938_CCFG_DIVMODE_2:
152 case TX4938_CCFG_DIVMODE_8:
153 txx9_gbus_clock = cpuclk / 2; break;
154 case TX4938_CCFG_DIVMODE_2_5:
155 case TX4938_CCFG_DIVMODE_10:
156 txx9_gbus_clock = cpuclk * 2 / 5; break;
157 case TX4938_CCFG_DIVMODE_3:
158 case TX4938_CCFG_DIVMODE_12:
159 txx9_gbus_clock = cpuclk / 3; break;
160 case TX4938_CCFG_DIVMODE_4:
161 case TX4938_CCFG_DIVMODE_16:
162 txx9_gbus_clock = cpuclk / 4; break;
163 case TX4938_CCFG_DIVMODE_4_5:
164 case TX4938_CCFG_DIVMODE_18:
165 txx9_gbus_clock = cpuclk * 2 / 9; break;
168 case TX4938_CCFG_DIVMODE_8:
169 case TX4938_CCFG_DIVMODE_10:
170 case TX4938_CCFG_DIVMODE_12:
171 case TX4938_CCFG_DIVMODE_16:
172 case TX4938_CCFG_DIVMODE_18:
173 txx9_master_clock = txx9_gbus_clock / 4; break;
175 txx9_master_clock = txx9_gbus_clock;
178 /* change default value to udelay/mdelay take reasonable time */
179 loops_per_jiffy = txx9_cpu_clock / HZ / 2;
183 /* clear BusErrorOnWrite flag (W1C) */
184 tx4938_ccfg_set(TX4938_CCFG_BEOW);
185 /* enable Timeout BusError */
187 tx4938_ccfg_set(TX4938_CCFG_TOE);
190 txx9_clear64(&tx4938_ccfgptr->pcfg, TX4938_PCFG_DMASEL_ALL);
192 /* Use external clock for external arbiter */
193 if (!(____raw_readq(&tx4938_ccfgptr->ccfg) & TX4938_CCFG_PCIARB))
194 txx9_clear64(&tx4938_ccfgptr->pcfg, TX4938_PCFG_PCICLKEN_ALL);
196 printk(KERN_INFO "%s -- %dMHz(M%dMHz) CRIR:%08x CCFG:%llx PCFG:%llx\n",
198 (cpuclk + 500000) / 1000000,
199 (txx9_master_clock + 500000) / 1000000,
200 (__u32)____raw_readq(&tx4938_ccfgptr->crir),
201 (unsigned long long)____raw_readq(&tx4938_ccfgptr->ccfg),
202 (unsigned long long)____raw_readq(&tx4938_ccfgptr->pcfg));
204 printk(KERN_INFO "%s SDRAMC --", txx9_pcode_str);
205 for (i = 0; i < 4; i++) {
206 __u64 cr = TX4938_SDRAMC_CR(i);
207 unsigned long base, size;
208 if (!((__u32)cr & 0x00000400))
209 continue; /* disabled */
210 base = (unsigned long)(cr >> 49) << 21;
211 size = (((unsigned long)(cr >> 33) & 0x7fff) + 1) << 21;
212 printk(" CR%d:%016llx", i, (unsigned long long)cr);
213 tx4938_sdram_resource[i].name = "SDRAM";
214 tx4938_sdram_resource[i].start = base;
215 tx4938_sdram_resource[i].end = base + size - 1;
216 tx4938_sdram_resource[i].flags = IORESOURCE_MEM;
217 request_resource(&iomem_resource, &tx4938_sdram_resource[i]);
219 printk(" TR:%09llx\n",
220 (unsigned long long)____raw_readq(&tx4938_sdramcptr->tr));
223 if (txx9_pcode == 0x4938 && ____raw_readq(&tx4938_sramcptr->cr) & 1) {
224 unsigned int size = TX4938_SRAM_SIZE;
225 tx4938_sram_resource.name = "SRAM";
226 tx4938_sram_resource.start =
227 (____raw_readq(&tx4938_sramcptr->cr) >> (39-11))
229 tx4938_sram_resource.end =
230 tx4938_sram_resource.start + TX4938_SRAM_SIZE - 1;
231 tx4938_sram_resource.flags = IORESOURCE_MEM;
232 request_resource(&iomem_resource, &tx4938_sram_resource);
236 /* disable all timers */
237 for (i = 0; i < TX4938_NR_TMR; i++)
238 txx9_tmr_init(TX4938_TMR_REG(i) & 0xfffffffffULL);
241 for (i = 0; i < 2; i++)
242 ____raw_writeq(TX4938_DMA_MCR_MSTEN,
243 (void __iomem *)(TX4938_DMA_REG(i) + 0x50));
246 txx9_gpio_init(TX4938_PIO_REG & 0xfffffffffULL, 0, TX4938_NUM_PIO);
247 __raw_writel(0, &tx4938_pioptr->maskcpu);
248 __raw_writel(0, &tx4938_pioptr->maskext);
250 if (txx9_pcode == 0x4938) {
251 __u64 pcfg = ____raw_readq(&tx4938_ccfgptr->pcfg);
252 /* set PCIC1 reset */
253 txx9_set64(&tx4938_ccfgptr->clkctr, TX4938_CLKCTR_PCIC1RST);
254 if (pcfg & (TX4938_PCFG_ETH0_SEL | TX4938_PCFG_ETH1_SEL)) {
255 mdelay(1); /* at least 128 cpu clock */
256 /* clear PCIC1 reset */
257 txx9_clear64(&tx4938_ccfgptr->clkctr,
258 TX4938_CLKCTR_PCIC1RST);
260 printk(KERN_INFO "%s: stop PCIC1\n", txx9_pcode_str);
262 txx9_set64(&tx4938_ccfgptr->clkctr,
263 TX4938_CLKCTR_PCIC1CKD);
265 if (!(pcfg & TX4938_PCFG_ETH0_SEL)) {
266 printk(KERN_INFO "%s: stop ETH0\n", txx9_pcode_str);
267 txx9_set64(&tx4938_ccfgptr->clkctr,
268 TX4938_CLKCTR_ETH0RST);
269 txx9_set64(&tx4938_ccfgptr->clkctr,
270 TX4938_CLKCTR_ETH0CKD);
272 if (!(pcfg & TX4938_PCFG_ETH1_SEL)) {
273 printk(KERN_INFO "%s: stop ETH1\n", txx9_pcode_str);
274 txx9_set64(&tx4938_ccfgptr->clkctr,
275 TX4938_CLKCTR_ETH1RST);
276 txx9_set64(&tx4938_ccfgptr->clkctr,
277 TX4938_CLKCTR_ETH1CKD);
281 _machine_restart = tx4938_machine_restart;
282 board_be_init = tx4938_be_init;
285 void __init tx4938_time_init(unsigned int tmrnr)
287 if (____raw_readq(&tx4938_ccfgptr->ccfg) & TX4938_CCFG_TINTDIS)
288 txx9_clockevent_init(TX4938_TMR_REG(tmrnr) & 0xfffffffffULL,
289 TXX9_IRQ_BASE + TX4938_IR_TMR(tmrnr),
293 void __init tx4938_sio_init(unsigned int sclk, unsigned int cts_mask)
296 unsigned int ch_mask = 0;
298 if (__raw_readq(&tx4938_ccfgptr->pcfg) & TX4938_PCFG_ETH0_SEL)
299 ch_mask |= 1 << 1; /* disable SIO1 by PCFG setting */
300 for (i = 0; i < 2; i++) {
301 if ((1 << i) & ch_mask)
303 txx9_sio_init(TX4938_SIO_REG(i) & 0xfffffffffULL,
304 TXX9_IRQ_BASE + TX4938_IR_SIO(i),
305 i, sclk, (1 << i) & cts_mask);
309 void __init tx4938_spi_init(int busid)
311 txx9_spi_init(busid, TX4938_SPI_REG & 0xfffffffffULL,
312 TXX9_IRQ_BASE + TX4938_IR_SPI);
315 void __init tx4938_ethaddr_init(unsigned char *addr0, unsigned char *addr1)
317 u64 pcfg = __raw_readq(&tx4938_ccfgptr->pcfg);
319 if (addr0 && (pcfg & TX4938_PCFG_ETH0_SEL))
320 txx9_ethaddr_init(TXX9_IRQ_BASE + TX4938_IR_ETH0, addr0);
321 if (addr1 && (pcfg & TX4938_PCFG_ETH1_SEL))
322 txx9_ethaddr_init(TXX9_IRQ_BASE + TX4938_IR_ETH1, addr1);
325 void __init tx4938_mtd_init(int ch)
327 struct physmap_flash_data pdata = {
328 .width = TX4938_EBUSC_WIDTH(ch) / 8,
330 unsigned long start = txx9_ce_res[ch].start;
331 unsigned long size = txx9_ce_res[ch].end - start + 1;
333 if (!(TX4938_EBUSC_CR(ch) & 0x8))
334 return; /* disabled */
335 txx9_physmap_flash_init(ch, start, size, &pdata);
338 static void __init tx4938_stop_unused_modules(void)
340 __u64 pcfg, rst = 0, ckd = 0;
345 pcfg = ____raw_readq(&tx4938_ccfgptr->pcfg);
346 switch (txx9_pcode) {
348 if (!(pcfg & TX4938_PCFG_SEL2)) {
349 rst |= TX4938_CLKCTR_ACLRST;
350 ckd |= TX4938_CLKCTR_ACLCKD;
351 strcat(buf, " ACLC");
355 if (!(pcfg & TX4938_PCFG_SEL2) ||
356 (pcfg & TX4938_PCFG_ETH0_SEL)) {
357 rst |= TX4938_CLKCTR_ACLRST;
358 ckd |= TX4938_CLKCTR_ACLCKD;
359 strcat(buf, " ACLC");
362 (TX4938_PCFG_ATA_SEL | TX4938_PCFG_ISA_SEL |
363 TX4938_PCFG_NDF_SEL))
364 != TX4938_PCFG_NDF_SEL) {
365 rst |= TX4938_CLKCTR_NDFRST;
366 ckd |= TX4938_CLKCTR_NDFCKD;
367 strcat(buf, " NDFMC");
369 if (!(pcfg & TX4938_PCFG_SPI_SEL)) {
370 rst |= TX4938_CLKCTR_SPIRST;
371 ckd |= TX4938_CLKCTR_SPICKD;
377 txx9_set64(&tx4938_ccfgptr->clkctr, rst);
378 txx9_set64(&tx4938_ccfgptr->clkctr, ckd);
382 pr_info("%s: stop%s\n", txx9_pcode_str, buf);
385 static int __init tx4938_late_init(void)
387 if (txx9_pcode != 0x4937 && txx9_pcode != 0x4938)
389 tx4938_stop_unused_modules();
392 late_initcall(tx4938_late_init);