2 * linux/arch/mips/txx9/generic/setup.c
4 * Based on linux/arch/mips/txx9/rbtx4938/setup.c,
5 * and RBTX49xx patch from CELF patch archive.
7 * 2003-2005 (c) MontaVista Software, Inc.
8 * (C) Copyright TOSHIBA CORPORATION 2000-2001, 2004-2007
10 * This file is subject to the terms and conditions of the GNU General Public
11 * License. See the file "COPYING" in the main directory of this archive
14 #include <linux/init.h>
15 #include <linux/kernel.h>
16 #include <linux/types.h>
17 #include <linux/interrupt.h>
18 #include <linux/string.h>
19 #include <linux/module.h>
20 #include <linux/clk.h>
21 #include <linux/err.h>
22 #include <linux/gpio.h>
23 #include <linux/platform_device.h>
24 #include <linux/serial_core.h>
25 #include <asm/bootinfo.h>
27 #include <asm/reboot.h>
28 #include <asm/r4kcache.h>
29 #include <asm/txx9/generic.h>
30 #include <asm/txx9/pci.h>
31 #ifdef CONFIG_CPU_TX49XX
32 #include <asm/txx9/tx4938.h>
35 /* EBUSC settings of TX4927, etc. */
36 struct resource txx9_ce_res[8];
37 static char txx9_ce_res_name[8][4]; /* "CEn" */
39 /* pcode, internal register */
40 unsigned int txx9_pcode;
41 char txx9_pcode_str[8];
42 static struct resource txx9_reg_res = {
43 .name = txx9_pcode_str,
44 .flags = IORESOURCE_MEM,
47 txx9_reg_res_init(unsigned int pcode, unsigned long base, unsigned long size)
51 for (i = 0; i < ARRAY_SIZE(txx9_ce_res); i++) {
52 sprintf(txx9_ce_res_name[i], "CE%d", i);
53 txx9_ce_res[i].flags = IORESOURCE_MEM;
54 txx9_ce_res[i].name = txx9_ce_res_name[i];
58 sprintf(txx9_pcode_str, "TX%x", pcode);
60 txx9_reg_res.start = base & 0xfffffffffULL;
61 txx9_reg_res.end = (base & 0xfffffffffULL) + (size - 1);
62 request_resource(&iomem_resource, &txx9_reg_res);
67 unsigned int txx9_master_clock;
68 unsigned int txx9_cpu_clock;
69 unsigned int txx9_gbus_clock;
71 #ifdef CONFIG_CPU_TX39XX
72 /* don't enable by default - see errata */
73 int txx9_ccfg_toeon __initdata;
75 int txx9_ccfg_toeon __initdata = 1;
78 /* Minimum CLK support */
80 struct clk *clk_get(struct device *dev, const char *id)
82 if (!strcmp(id, "spi-baseclk"))
83 return (struct clk *)((unsigned long)txx9_gbus_clock / 2 / 4);
84 if (!strcmp(id, "imbus_clk"))
85 return (struct clk *)((unsigned long)txx9_gbus_clock / 2);
86 return ERR_PTR(-ENOENT);
88 EXPORT_SYMBOL(clk_get);
90 int clk_enable(struct clk *clk)
94 EXPORT_SYMBOL(clk_enable);
96 void clk_disable(struct clk *clk)
99 EXPORT_SYMBOL(clk_disable);
101 unsigned long clk_get_rate(struct clk *clk)
103 return (unsigned long)clk;
105 EXPORT_SYMBOL(clk_get_rate);
107 void clk_put(struct clk *clk)
110 EXPORT_SYMBOL(clk_put);
114 #ifdef CONFIG_GENERIC_GPIO
115 int gpio_to_irq(unsigned gpio)
119 EXPORT_SYMBOL(gpio_to_irq);
121 int irq_to_gpio(unsigned irq)
125 EXPORT_SYMBOL(irq_to_gpio);
128 #define BOARD_VEC(board) extern struct txx9_board_vec board;
129 #include <asm/txx9/boards.h>
132 struct txx9_board_vec *txx9_board_vec __initdata;
133 static char txx9_system_type[32];
135 static struct txx9_board_vec *board_vecs[] __initdata = {
136 #define BOARD_VEC(board) &board,
137 #include <asm/txx9/boards.h>
141 static struct txx9_board_vec *__init find_board_byname(const char *name)
145 /* search board_vecs table */
146 for (i = 0; i < ARRAY_SIZE(board_vecs); i++) {
147 if (strstr(board_vecs[i]->system, name))
148 return board_vecs[i];
153 static void __init prom_init_cmdline(void)
155 int argc = (int)fw_arg0;
156 int *argv32 = (int *)fw_arg1;
157 int i; /* Always ignore the "-c" at argv[0] */
158 char builtin[CL_SIZE];
160 /* ignore all built-in args if any f/w args given */
162 * But if built-in strings was started with '+', append them
163 * to command line args. If built-in was started with '-',
164 * ignore all f/w args.
167 if (arcs_cmdline[0] == '+')
168 strcpy(builtin, arcs_cmdline + 1);
169 else if (arcs_cmdline[0] == '-') {
170 strcpy(builtin, arcs_cmdline + 1);
172 } else if (argc <= 1)
173 strcpy(builtin, arcs_cmdline);
174 arcs_cmdline[0] = '\0';
176 for (i = 1; i < argc; i++) {
177 char *str = (char *)(long)argv32[i];
179 strcat(arcs_cmdline, " ");
180 if (strchr(str, ' ')) {
181 strcat(arcs_cmdline, "\"");
182 strcat(arcs_cmdline, str);
183 strcat(arcs_cmdline, "\"");
185 strcat(arcs_cmdline, str);
187 /* append saved builtin args */
190 strcat(arcs_cmdline, " ");
191 strcat(arcs_cmdline, builtin);
195 static int txx9_ic_disable __initdata;
196 static int txx9_dc_disable __initdata;
198 #if defined(CONFIG_CPU_TX49XX)
199 /* flush all cache on very early stage (before 4k_cache_init) */
200 static void __init early_flush_dcache(void)
202 unsigned int conf = read_c0_config();
203 unsigned int dc_size = 1 << (12 + ((conf & CONF_DC) >> 6));
204 unsigned int linesz = 32;
205 unsigned long addr, end;
207 end = INDEX_BASE + dc_size / 4;
209 for (addr = INDEX_BASE; addr < end; addr += linesz) {
210 cache_op(Index_Writeback_Inv_D, addr | 0);
211 cache_op(Index_Writeback_Inv_D, addr | 1);
212 cache_op(Index_Writeback_Inv_D, addr | 2);
213 cache_op(Index_Writeback_Inv_D, addr | 3);
217 static void __init txx9_cache_fixup(void)
221 conf = read_c0_config();
222 /* flush and disable */
223 if (txx9_ic_disable) {
224 conf |= TX49_CONF_IC;
225 write_c0_config(conf);
227 if (txx9_dc_disable) {
228 early_flush_dcache();
229 conf |= TX49_CONF_DC;
230 write_c0_config(conf);
234 conf = read_c0_config();
235 if (!txx9_ic_disable)
236 conf &= ~TX49_CONF_IC;
237 if (!txx9_dc_disable)
238 conf &= ~TX49_CONF_DC;
239 write_c0_config(conf);
241 if (conf & TX49_CONF_IC)
242 pr_info("TX49XX I-Cache disabled.\n");
243 if (conf & TX49_CONF_DC)
244 pr_info("TX49XX D-Cache disabled.\n");
246 #elif defined(CONFIG_CPU_TX39XX)
247 /* flush all cache on very early stage (before tx39_cache_init) */
248 static void __init early_flush_dcache(void)
250 unsigned int conf = read_c0_config();
251 unsigned int dc_size = 1 << (10 + ((conf & TX39_CONF_DCS_MASK) >>
252 TX39_CONF_DCS_SHIFT));
253 unsigned int linesz = 16;
254 unsigned long addr, end;
256 end = INDEX_BASE + dc_size / 2;
258 for (addr = INDEX_BASE; addr < end; addr += linesz) {
259 cache_op(Index_Writeback_Inv_D, addr | 0);
260 cache_op(Index_Writeback_Inv_D, addr | 1);
264 static void __init txx9_cache_fixup(void)
268 conf = read_c0_config();
269 /* flush and disable */
270 if (txx9_ic_disable) {
271 conf &= ~TX39_CONF_ICE;
272 write_c0_config(conf);
274 if (txx9_dc_disable) {
275 early_flush_dcache();
276 conf &= ~TX39_CONF_DCE;
277 write_c0_config(conf);
281 conf = read_c0_config();
282 if (!txx9_ic_disable)
283 conf |= TX39_CONF_ICE;
284 if (!txx9_dc_disable)
285 conf |= TX39_CONF_DCE;
286 write_c0_config(conf);
288 if (!(conf & TX39_CONF_ICE))
289 pr_info("TX39XX I-Cache disabled.\n");
290 if (!(conf & TX39_CONF_DCE))
291 pr_info("TX39XX D-Cache disabled.\n");
294 static inline void txx9_cache_fixup(void)
299 static void __init preprocess_cmdline(void)
301 char cmdline[CL_SIZE];
304 strcpy(cmdline, arcs_cmdline);
306 arcs_cmdline[0] = '\0';
308 char *str = strsep(&s, " ");
309 if (strncmp(str, "board=", 6) == 0) {
310 txx9_board_vec = find_board_byname(str + 6);
312 } else if (strncmp(str, "masterclk=", 10) == 0) {
314 if (strict_strtoul(str + 10, 10, &val) == 0)
315 txx9_master_clock = val;
317 } else if (strcmp(str, "icdisable") == 0) {
320 } else if (strcmp(str, "dcdisable") == 0) {
323 } else if (strcmp(str, "toeoff") == 0) {
326 } else if (strcmp(str, "toeon") == 0) {
331 strcat(arcs_cmdline, " ");
332 strcat(arcs_cmdline, str);
338 static void __init select_board(void)
342 /* first, determine by "board=" argument in preprocess_cmdline() */
345 /* next, determine by "board" envvar */
346 envstr = prom_getenv("board");
348 txx9_board_vec = find_board_byname(envstr);
353 /* select "default" board */
354 #ifdef CONFIG_CPU_TX39XX
355 txx9_board_vec = &jmr3927_vec;
357 #ifdef CONFIG_CPU_TX49XX
358 switch (TX4938_REV_PCODE()) {
359 #ifdef CONFIG_TOSHIBA_RBTX4927
361 txx9_board_vec = &rbtx4927_vec;
364 txx9_board_vec = &rbtx4937_vec;
367 #ifdef CONFIG_TOSHIBA_RBTX4938
369 txx9_board_vec = &rbtx4938_vec;
376 void __init prom_init(void)
379 preprocess_cmdline();
382 strcpy(txx9_system_type, txx9_board_vec->system);
384 txx9_board_vec->prom_init();
387 void __init prom_free_prom_memory(void)
391 const char *get_system_type(void)
393 return txx9_system_type;
396 char * __init prom_getcmdline(void)
398 return &(arcs_cmdline[0]);
401 const char *__init prom_getenv(const char *name)
403 const s32 *str = (const s32 *)fw_arg2;
407 /* YAMON style ("name", "value" pairs) */
408 while (str[0] && str[1]) {
409 if (!strcmp((const char *)(unsigned long)str[0], name))
410 return (const char *)(unsigned long)str[1];
416 static void __noreturn txx9_machine_halt(void)
419 clear_c0_status(ST0_IM);
423 if (cpu_has_counter) {
425 * Clear counter interrupt while it
426 * breaks WAIT instruction even if
435 /* Watchdog support */
436 void __init txx9_wdt_init(unsigned long base)
438 struct resource res = {
440 .end = base + 0x100 - 1,
441 .flags = IORESOURCE_MEM,
443 platform_device_register_simple("txx9wdt", -1, &res, 1);
447 void __init txx9_spi_init(int busid, unsigned long base, int irq)
449 struct resource res[] = {
452 .end = base + 0x20 - 1,
453 .flags = IORESOURCE_MEM,
456 .flags = IORESOURCE_IRQ,
459 platform_device_register_simple("spi_txx9", busid,
460 res, ARRAY_SIZE(res));
463 void __init txx9_ethaddr_init(unsigned int id, unsigned char *ethaddr)
465 struct platform_device *pdev =
466 platform_device_alloc("tc35815-mac", id);
468 platform_device_add_data(pdev, ethaddr, 6) ||
469 platform_device_add(pdev))
470 platform_device_put(pdev);
473 void __init txx9_sio_init(unsigned long baseaddr, int irq,
474 unsigned int line, unsigned int sclk, int nocts)
476 #ifdef CONFIG_SERIAL_TXX9
477 struct uart_port req;
479 memset(&req, 0, sizeof(req));
481 req.iotype = UPIO_MEM;
482 req.membase = ioremap(baseaddr, 0x24);
483 req.mapbase = baseaddr;
486 req.flags |= UPF_BUGGY_UART /*HAVE_CTS_LINE*/;
488 req.flags |= UPF_MAGIC_MULTIPLIER /*USE_SCLK*/;
491 req.uartclk = TXX9_IMCLK;
492 early_serial_txx9_setup(&req);
493 #endif /* CONFIG_SERIAL_TXX9 */
496 #ifdef CONFIG_EARLY_PRINTK
497 static void __init null_prom_putchar(char c)
500 void (*txx9_prom_putchar)(char c) __initdata = null_prom_putchar;
502 void __init prom_putchar(char c)
504 txx9_prom_putchar(c);
507 static void __iomem *early_txx9_sio_port;
509 static void __init early_txx9_sio_putchar(char c)
511 #define TXX9_SICISR 0x0c
512 #define TXX9_SITFIFO 0x1c
513 #define TXX9_SICISR_TXALS 0x00000002
514 while (!(__raw_readl(early_txx9_sio_port + TXX9_SICISR) &
517 __raw_writel(c, early_txx9_sio_port + TXX9_SITFIFO);
520 void __init txx9_sio_putchar_init(unsigned long baseaddr)
522 early_txx9_sio_port = ioremap(baseaddr, 0x24);
523 txx9_prom_putchar = early_txx9_sio_putchar;
525 #endif /* CONFIG_EARLY_PRINTK */
528 void __init plat_mem_setup(void)
530 ioport_resource.start = 0;
531 ioport_resource.end = ~0UL; /* no limit */
532 iomem_resource.start = 0;
533 iomem_resource.end = ~0UL; /* no limit */
535 /* fallback restart/halt routines */
536 _machine_restart = (void (*)(char *))txx9_machine_halt;
537 _machine_halt = txx9_machine_halt;
538 pm_power_off = txx9_machine_halt;
541 pcibios_plat_setup = txx9_pcibios_setup;
543 txx9_board_vec->mem_setup();
546 void __init arch_init_irq(void)
548 txx9_board_vec->irq_setup();
551 void __init plat_time_init(void)
553 #ifdef CONFIG_CPU_TX49XX
554 mips_hpt_frequency = txx9_cpu_clock / 2;
556 txx9_board_vec->time_init();
559 static int __init _txx9_arch_init(void)
561 if (txx9_board_vec->arch_init)
562 txx9_board_vec->arch_init();
565 arch_initcall(_txx9_arch_init);
567 static int __init _txx9_device_init(void)
569 if (txx9_board_vec->device_init)
570 txx9_board_vec->device_init();
573 device_initcall(_txx9_device_init);
575 int (*txx9_irq_dispatch)(int pending);
576 asmlinkage void plat_irq_dispatch(void)
578 int pending = read_c0_status() & read_c0_cause() & ST0_IM;
579 int irq = txx9_irq_dispatch(pending);
581 if (likely(irq >= 0))
584 spurious_interrupt();
587 /* see include/asm-mips/mach-tx39xx/mangle-port.h, for example. */
588 #ifdef NEEDS_TXX9_SWIZZLE_ADDR_B
589 static unsigned long __swizzle_addr_none(unsigned long port)
593 unsigned long (*__swizzle_addr_b)(unsigned long port) = __swizzle_addr_none;
594 EXPORT_SYMBOL(__swizzle_addr_b);