2 * TX4939 setup routines
3 * Based on linux/arch/mips/txx9/generic/setup_tx4938.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/netdevice.h>
17 #include <linux/notifier.h>
18 #include <linux/sysdev.h>
19 #include <linux/ethtool.h>
20 #include <linux/param.h>
21 #include <linux/ptrace.h>
22 #include <linux/mtd/physmap.h>
23 #include <linux/platform_device.h>
24 #include <asm/bootinfo.h>
25 #include <asm/reboot.h>
26 #include <asm/traps.h>
27 #include <asm/txx9irq.h>
28 #include <asm/txx9tmr.h>
29 #include <asm/txx9/generic.h>
30 #include <asm/txx9/tx4939.h>
32 static void __init tx4939_wdr_init(void)
34 /* report watchdog reset status */
35 if (____raw_readq(&tx4939_ccfgptr->ccfg) & TX4939_CCFG_WDRST)
36 pr_warning("Watchdog reset detected at 0x%lx\n",
38 /* clear WatchDogReset (W1C) */
39 tx4939_ccfg_set(TX4939_CCFG_WDRST);
40 /* do reset on watchdog */
41 tx4939_ccfg_set(TX4939_CCFG_WR);
44 void __init tx4939_wdt_init(void)
46 txx9_wdt_init(TX4939_TMR_REG(2) & 0xfffffffffULL);
49 static void tx4939_machine_restart(char *command)
52 pr_emerg("Rebooting (with %s watchdog reset)...\n",
53 (____raw_readq(&tx4939_ccfgptr->ccfg) & TX4939_CCFG_WDREXEN) ?
54 "external" : "internal");
55 /* clear watchdog status */
56 tx4939_ccfg_set(TX4939_CCFG_WDRST); /* W1C */
57 txx9_wdt_now(TX4939_TMR_REG(2) & 0xfffffffffULL);
58 while (!(____raw_readq(&tx4939_ccfgptr->ccfg) & TX4939_CCFG_WDRST))
61 if (____raw_readq(&tx4939_ccfgptr->ccfg) & TX4939_CCFG_WDREXEN) {
62 pr_emerg("Rebooting (with internal watchdog reset)...\n");
63 /* External WDRST failed. Do internal watchdog reset */
64 tx4939_ccfg_clear(TX4939_CCFG_WDREXEN);
70 void show_registers(struct pt_regs *regs);
71 static int tx4939_be_handler(struct pt_regs *regs, int is_fixup)
73 int data = regs->cp0_cause & 4;
75 pr_err("%cBE exception at %#lx\n",
76 data ? 'D' : 'I', regs->cp0_epc);
77 pr_err("ccfg:%llx, toea:%llx\n",
78 (unsigned long long)____raw_readq(&tx4939_ccfgptr->ccfg),
79 (unsigned long long)____raw_readq(&tx4939_ccfgptr->toea));
81 tx4927_report_pcic_status();
86 static void __init tx4939_be_init(void)
88 board_be_handler = tx4939_be_handler;
91 static struct resource tx4939_sdram_resource[4];
92 static struct resource tx4939_sram_resource;
93 #define TX4939_SRAM_SIZE 0x800
95 void __init tx4939_add_memory_regions(void)
98 unsigned long start, size;
101 for (i = 0; i < 4; i++) {
102 if (!((__u32)____raw_readq(&tx4939_ddrcptr->winen) & (1 << i)))
104 win = ____raw_readq(&tx4939_ddrcptr->win[i]);
105 start = (unsigned long)(win >> 48);
106 size = (((unsigned long)(win >> 32) & 0xffff) + 1) - start;
107 add_memory_region(start << 20, size << 20, BOOT_MEM_RAM);
111 void __init tx4939_setup(void)
118 txx9_reg_res_init(TX4939_REV_PCODE(), TX4939_REG_BASE,
120 set_c0_config(TX49_CONF_CWFON);
122 /* SDRAMC,EBUSC are configured by PROM */
123 for (i = 0; i < 4; i++) {
124 if (!(TX4939_EBUSC_CR(i) & 0x8))
125 continue; /* disabled */
126 txx9_ce_res[i].start = (unsigned long)TX4939_EBUSC_BA(i);
128 txx9_ce_res[i].start + TX4939_EBUSC_SIZE(i) - 1;
129 request_resource(&iomem_resource, &txx9_ce_res[i]);
133 if (txx9_master_clock) {
134 /* calculate cpu_clock from master_clock */
135 divmode = (__u32)____raw_readq(&tx4939_ccfgptr->ccfg) &
136 TX4939_CCFG_MULCLK_MASK;
137 cpuclk = txx9_master_clock * 20 / 2;
139 case TX4939_CCFG_MULCLK_8:
140 cpuclk = cpuclk / 3 * 4 /* / 6 * 8 */; break;
141 case TX4939_CCFG_MULCLK_9:
142 cpuclk = cpuclk / 2 * 3 /* / 6 * 9 */; break;
143 case TX4939_CCFG_MULCLK_10:
144 cpuclk = cpuclk / 3 * 5 /* / 6 * 10 */; break;
145 case TX4939_CCFG_MULCLK_11:
146 cpuclk = cpuclk / 6 * 11; break;
147 case TX4939_CCFG_MULCLK_12:
148 cpuclk = cpuclk * 2 /* / 6 * 12 */; break;
149 case TX4939_CCFG_MULCLK_13:
150 cpuclk = cpuclk / 6 * 13; break;
151 case TX4939_CCFG_MULCLK_14:
152 cpuclk = cpuclk / 3 * 7 /* / 6 * 14 */; break;
153 case TX4939_CCFG_MULCLK_15:
154 cpuclk = cpuclk / 2 * 5 /* / 6 * 15 */; break;
156 txx9_cpu_clock = cpuclk;
158 if (txx9_cpu_clock == 0)
159 txx9_cpu_clock = 400000000; /* 400MHz */
160 /* calculate master_clock from cpu_clock */
161 cpuclk = txx9_cpu_clock;
162 divmode = (__u32)____raw_readq(&tx4939_ccfgptr->ccfg) &
163 TX4939_CCFG_MULCLK_MASK;
165 case TX4939_CCFG_MULCLK_8:
166 txx9_master_clock = cpuclk * 6 / 8; break;
167 case TX4939_CCFG_MULCLK_9:
168 txx9_master_clock = cpuclk * 6 / 9; break;
169 case TX4939_CCFG_MULCLK_10:
170 txx9_master_clock = cpuclk * 6 / 10; break;
171 case TX4939_CCFG_MULCLK_11:
172 txx9_master_clock = cpuclk * 6 / 11; break;
173 case TX4939_CCFG_MULCLK_12:
174 txx9_master_clock = cpuclk * 6 / 12; break;
175 case TX4939_CCFG_MULCLK_13:
176 txx9_master_clock = cpuclk * 6 / 13; break;
177 case TX4939_CCFG_MULCLK_14:
178 txx9_master_clock = cpuclk * 6 / 14; break;
179 case TX4939_CCFG_MULCLK_15:
180 txx9_master_clock = cpuclk * 6 / 15; break;
182 txx9_master_clock /= 10; /* * 2 / 20 */
184 /* calculate gbus_clock from cpu_clock */
185 divmode = (__u32)____raw_readq(&tx4939_ccfgptr->ccfg) &
186 TX4939_CCFG_YDIVMODE_MASK;
187 txx9_gbus_clock = txx9_cpu_clock;
189 case TX4939_CCFG_YDIVMODE_2:
190 txx9_gbus_clock /= 2; break;
191 case TX4939_CCFG_YDIVMODE_3:
192 txx9_gbus_clock /= 3; break;
193 case TX4939_CCFG_YDIVMODE_5:
194 txx9_gbus_clock /= 5; break;
195 case TX4939_CCFG_YDIVMODE_6:
196 txx9_gbus_clock /= 6; break;
198 /* change default value to udelay/mdelay take reasonable time */
199 loops_per_jiffy = txx9_cpu_clock / HZ / 2;
203 /* clear BusErrorOnWrite flag (W1C) */
204 tx4939_ccfg_set(TX4939_CCFG_WDRST | TX4939_CCFG_BEOW);
205 /* enable Timeout BusError */
207 tx4939_ccfg_set(TX4939_CCFG_TOE);
210 txx9_clear64(&tx4939_ccfgptr->pcfg, TX4939_PCFG_DMASEL_ALL);
212 /* Use external clock for external arbiter */
213 if (!(____raw_readq(&tx4939_ccfgptr->ccfg) & TX4939_CCFG_PCIARB))
214 txx9_clear64(&tx4939_ccfgptr->pcfg, TX4939_PCFG_PCICLKEN_ALL);
216 pr_info("%s -- %dMHz(M%dMHz,G%dMHz) CRIR:%08x CCFG:%llx PCFG:%llx\n",
218 (cpuclk + 500000) / 1000000,
219 (txx9_master_clock + 500000) / 1000000,
220 (txx9_gbus_clock + 500000) / 1000000,
221 (__u32)____raw_readq(&tx4939_ccfgptr->crir),
222 (unsigned long long)____raw_readq(&tx4939_ccfgptr->ccfg),
223 (unsigned long long)____raw_readq(&tx4939_ccfgptr->pcfg));
225 pr_info("%s DDRC -- EN:%08x", txx9_pcode_str,
226 (__u32)____raw_readq(&tx4939_ddrcptr->winen));
227 for (i = 0; i < 4; i++) {
228 __u64 win = ____raw_readq(&tx4939_ddrcptr->win[i]);
229 if (!((__u32)____raw_readq(&tx4939_ddrcptr->winen) & (1 << i)))
230 continue; /* disabled */
231 printk(KERN_CONT " #%d:%016llx", i, (unsigned long long)win);
232 tx4939_sdram_resource[i].name = "DDR SDRAM";
233 tx4939_sdram_resource[i].start =
234 (unsigned long)(win >> 48) << 20;
235 tx4939_sdram_resource[i].end =
236 ((((unsigned long)(win >> 32) & 0xffff) + 1) <<
238 tx4939_sdram_resource[i].flags = IORESOURCE_MEM;
239 request_resource(&iomem_resource, &tx4939_sdram_resource[i]);
241 printk(KERN_CONT "\n");
244 if (____raw_readq(&tx4939_sramcptr->cr) & 1) {
245 unsigned int size = TX4939_SRAM_SIZE;
246 tx4939_sram_resource.name = "SRAM";
247 tx4939_sram_resource.start =
248 (____raw_readq(&tx4939_sramcptr->cr) >> (39-11))
250 tx4939_sram_resource.end =
251 tx4939_sram_resource.start + TX4939_SRAM_SIZE - 1;
252 tx4939_sram_resource.flags = IORESOURCE_MEM;
253 request_resource(&iomem_resource, &tx4939_sram_resource);
257 /* disable all timers */
258 for (i = 0; i < TX4939_NR_TMR; i++)
259 txx9_tmr_init(TX4939_TMR_REG(i) & 0xfffffffffULL);
262 for (i = 0; i < 2; i++)
263 ____raw_writeq(TX4938_DMA_MCR_MSTEN,
264 (void __iomem *)(TX4939_DMA_REG(i) + 0x50));
266 /* set PCIC1 reset (required to prevent hangup on BIST) */
267 txx9_set64(&tx4939_ccfgptr->clkctr, TX4939_CLKCTR_PCI1RST);
268 pcfg = ____raw_readq(&tx4939_ccfgptr->pcfg);
269 if (pcfg & (TX4939_PCFG_ET0MODE | TX4939_PCFG_ET1MODE)) {
270 mdelay(1); /* at least 128 cpu clock */
271 /* clear PCIC1 reset */
272 txx9_clear64(&tx4939_ccfgptr->clkctr, TX4939_CLKCTR_PCI1RST);
274 pr_info("%s: stop PCIC1\n", txx9_pcode_str);
276 txx9_set64(&tx4939_ccfgptr->clkctr, TX4939_CLKCTR_PCI1CKD);
278 if (!(pcfg & TX4939_PCFG_ET0MODE)) {
279 pr_info("%s: stop ETH0\n", txx9_pcode_str);
280 txx9_set64(&tx4939_ccfgptr->clkctr, TX4939_CLKCTR_ETH0RST);
281 txx9_set64(&tx4939_ccfgptr->clkctr, TX4939_CLKCTR_ETH0CKD);
283 if (!(pcfg & TX4939_PCFG_ET1MODE)) {
284 pr_info("%s: stop ETH1\n", txx9_pcode_str);
285 txx9_set64(&tx4939_ccfgptr->clkctr, TX4939_CLKCTR_ETH1RST);
286 txx9_set64(&tx4939_ccfgptr->clkctr, TX4939_CLKCTR_ETH1CKD);
289 _machine_restart = tx4939_machine_restart;
290 board_be_init = tx4939_be_init;
293 void __init tx4939_time_init(unsigned int tmrnr)
295 if (____raw_readq(&tx4939_ccfgptr->ccfg) & TX4939_CCFG_TINTDIS)
296 txx9_clockevent_init(TX4939_TMR_REG(tmrnr) & 0xfffffffffULL,
297 TXX9_IRQ_BASE + TX4939_IR_TMR(tmrnr),
301 void __init tx4939_sio_init(unsigned int sclk, unsigned int cts_mask)
304 unsigned int ch_mask = 0;
305 __u64 pcfg = __raw_readq(&tx4939_ccfgptr->pcfg);
307 cts_mask |= ~1; /* only SIO0 have RTS/CTS */
308 if ((pcfg & TX4939_PCFG_SIO2MODE_MASK) != TX4939_PCFG_SIO2MODE_SIO0)
309 cts_mask |= 1 << 0; /* disable SIO0 RTS/CTS by PCFG setting */
310 if ((pcfg & TX4939_PCFG_SIO2MODE_MASK) != TX4939_PCFG_SIO2MODE_SIO2)
311 ch_mask |= 1 << 2; /* disable SIO2 by PCFG setting */
312 if (pcfg & TX4939_PCFG_SIO3MODE)
313 ch_mask |= 1 << 3; /* disable SIO3 by PCFG setting */
314 for (i = 0; i < 4; i++) {
315 if ((1 << i) & ch_mask)
317 txx9_sio_init(TX4939_SIO_REG(i) & 0xfffffffffULL,
318 TXX9_IRQ_BASE + TX4939_IR_SIO(i),
319 i, sclk, (1 << i) & cts_mask);
323 #if defined(CONFIG_TC35815) || defined(CONFIG_TC35815_MODULE)
324 static int tx4939_get_eth_speed(struct net_device *dev)
326 struct ethtool_cmd cmd = { ETHTOOL_GSET };
327 int speed = 100; /* default 100Mbps */
329 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
331 err = dev->ethtool_ops->get_settings(dev, &cmd);
334 speed = cmd.speed == SPEED_100 ? 100 : 10;
337 static int tx4939_netdev_event(struct notifier_block *this,
341 struct net_device *dev = ptr;
342 if (event == NETDEV_CHANGE && netif_carrier_ok(dev)) {
344 if (dev->irq == TXX9_IRQ_BASE + TX4939_IR_ETH(0))
345 bit = TX4939_PCFG_SPEED0;
346 else if (dev->irq == TXX9_IRQ_BASE + TX4939_IR_ETH(1))
347 bit = TX4939_PCFG_SPEED1;
349 int speed = tx4939_get_eth_speed(dev);
351 txx9_set64(&tx4939_ccfgptr->pcfg, bit);
353 txx9_clear64(&tx4939_ccfgptr->pcfg, bit);
359 static struct notifier_block tx4939_netdev_notifier = {
360 .notifier_call = tx4939_netdev_event,
364 void __init tx4939_ethaddr_init(unsigned char *addr0, unsigned char *addr1)
366 u64 pcfg = __raw_readq(&tx4939_ccfgptr->pcfg);
368 if (addr0 && (pcfg & TX4939_PCFG_ET0MODE))
369 txx9_ethaddr_init(TXX9_IRQ_BASE + TX4939_IR_ETH(0), addr0);
370 if (addr1 && (pcfg & TX4939_PCFG_ET1MODE))
371 txx9_ethaddr_init(TXX9_IRQ_BASE + TX4939_IR_ETH(1), addr1);
372 register_netdevice_notifier(&tx4939_netdev_notifier);
375 void __init tx4939_ethaddr_init(unsigned char *addr0, unsigned char *addr1)
380 void __init tx4939_mtd_init(int ch)
382 struct physmap_flash_data pdata = {
383 .width = TX4939_EBUSC_WIDTH(ch) / 8,
385 unsigned long start = txx9_ce_res[ch].start;
386 unsigned long size = txx9_ce_res[ch].end - start + 1;
388 if (!(TX4939_EBUSC_CR(ch) & 0x8))
389 return; /* disabled */
390 txx9_physmap_flash_init(ch, start, size, &pdata);
393 #define TX4939_ATA_REG_PHYS(ch) (TX4939_ATA_REG(ch) & 0xfffffffffULL)
394 void __init tx4939_ata_init(void)
396 static struct resource ata0_res[] = {
398 .start = TX4939_ATA_REG_PHYS(0),
399 .end = TX4939_ATA_REG_PHYS(0) + 0x1000 - 1,
400 .flags = IORESOURCE_MEM,
402 .start = TXX9_IRQ_BASE + TX4939_IR_ATA(0),
403 .flags = IORESOURCE_IRQ,
406 static struct resource ata1_res[] = {
408 .start = TX4939_ATA_REG_PHYS(1),
409 .end = TX4939_ATA_REG_PHYS(1) + 0x1000 - 1,
410 .flags = IORESOURCE_MEM,
412 .start = TXX9_IRQ_BASE + TX4939_IR_ATA(1),
413 .flags = IORESOURCE_IRQ,
416 static struct platform_device ata0_dev = {
419 .num_resources = ARRAY_SIZE(ata0_res),
420 .resource = ata0_res,
422 static struct platform_device ata1_dev = {
425 .num_resources = ARRAY_SIZE(ata1_res),
426 .resource = ata1_res,
428 __u64 pcfg = __raw_readq(&tx4939_ccfgptr->pcfg);
430 if (pcfg & TX4939_PCFG_ATA0MODE)
431 platform_device_register(&ata0_dev);
432 if ((pcfg & (TX4939_PCFG_ATA1MODE |
433 TX4939_PCFG_ET1MODE |
434 TX4939_PCFG_ET0MODE)) == TX4939_PCFG_ATA1MODE)
435 platform_device_register(&ata1_dev);
438 void __init tx4939_rtc_init(void)
440 static struct resource res[] = {
442 .start = TX4939_RTC_REG & 0xfffffffffULL,
443 .end = (TX4939_RTC_REG & 0xfffffffffULL) + 0x100 - 1,
444 .flags = IORESOURCE_MEM,
446 .start = TXX9_IRQ_BASE + TX4939_IR_RTC,
447 .flags = IORESOURCE_IRQ,
450 static struct platform_device rtc_dev = {
453 .num_resources = ARRAY_SIZE(res),
457 platform_device_register(&rtc_dev);
460 static void __init tx4939_stop_unused_modules(void)
462 __u64 pcfg, rst = 0, ckd = 0;
467 pcfg = ____raw_readq(&tx4939_ccfgptr->pcfg);
468 if ((pcfg & TX4939_PCFG_I2SMODE_MASK) !=
469 TX4939_PCFG_I2SMODE_ACLC) {
470 rst |= TX4939_CLKCTR_ACLRST;
471 ckd |= TX4939_CLKCTR_ACLCKD;
472 strcat(buf, " ACLC");
474 if ((pcfg & TX4939_PCFG_I2SMODE_MASK) !=
475 TX4939_PCFG_I2SMODE_I2S &&
476 (pcfg & TX4939_PCFG_I2SMODE_MASK) !=
477 TX4939_PCFG_I2SMODE_I2S_ALT) {
478 rst |= TX4939_CLKCTR_I2SRST;
479 ckd |= TX4939_CLKCTR_I2SCKD;
482 if (!(pcfg & TX4939_PCFG_ATA0MODE)) {
483 rst |= TX4939_CLKCTR_ATA0RST;
484 ckd |= TX4939_CLKCTR_ATA0CKD;
485 strcat(buf, " ATA0");
487 if (!(pcfg & TX4939_PCFG_ATA1MODE)) {
488 rst |= TX4939_CLKCTR_ATA1RST;
489 ckd |= TX4939_CLKCTR_ATA1CKD;
490 strcat(buf, " ATA1");
492 if (pcfg & TX4939_PCFG_SPIMODE) {
493 rst |= TX4939_CLKCTR_SPIRST;
494 ckd |= TX4939_CLKCTR_SPICKD;
497 if (!(pcfg & (TX4939_PCFG_VSSMODE | TX4939_PCFG_VPSMODE))) {
498 rst |= TX4939_CLKCTR_VPCRST;
499 ckd |= TX4939_CLKCTR_VPCCKD;
502 if ((pcfg & TX4939_PCFG_SIO2MODE_MASK) != TX4939_PCFG_SIO2MODE_SIO2) {
503 rst |= TX4939_CLKCTR_SIO2RST;
504 ckd |= TX4939_CLKCTR_SIO2CKD;
505 strcat(buf, " SIO2");
507 if (pcfg & TX4939_PCFG_SIO3MODE) {
508 rst |= TX4939_CLKCTR_SIO3RST;
509 ckd |= TX4939_CLKCTR_SIO3CKD;
510 strcat(buf, " SIO3");
513 txx9_set64(&tx4939_ccfgptr->clkctr, rst);
514 txx9_set64(&tx4939_ccfgptr->clkctr, ckd);
518 pr_info("%s: stop%s\n", txx9_pcode_str, buf);
521 static int __init tx4939_late_init(void)
523 if (txx9_pcode != 0x4939)
525 tx4939_stop_unused_modules();
528 late_initcall(tx4939_late_init);