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 int txx9_ccfg_toeon __initdata = 1;
73 /* Minimum CLK support */
75 struct clk *clk_get(struct device *dev, const char *id)
77 if (!strcmp(id, "spi-baseclk"))
78 return (struct clk *)((unsigned long)txx9_gbus_clock / 2 / 4);
79 if (!strcmp(id, "imbus_clk"))
80 return (struct clk *)((unsigned long)txx9_gbus_clock / 2);
81 return ERR_PTR(-ENOENT);
83 EXPORT_SYMBOL(clk_get);
85 int clk_enable(struct clk *clk)
89 EXPORT_SYMBOL(clk_enable);
91 void clk_disable(struct clk *clk)
94 EXPORT_SYMBOL(clk_disable);
96 unsigned long clk_get_rate(struct clk *clk)
98 return (unsigned long)clk;
100 EXPORT_SYMBOL(clk_get_rate);
102 void clk_put(struct clk *clk)
105 EXPORT_SYMBOL(clk_put);
109 #ifdef CONFIG_GENERIC_GPIO
110 int gpio_to_irq(unsigned gpio)
114 EXPORT_SYMBOL(gpio_to_irq);
116 int irq_to_gpio(unsigned irq)
120 EXPORT_SYMBOL(irq_to_gpio);
123 #define BOARD_VEC(board) extern struct txx9_board_vec board;
124 #include <asm/txx9/boards.h>
127 struct txx9_board_vec *txx9_board_vec __initdata;
128 static char txx9_system_type[32];
130 static struct txx9_board_vec *board_vecs[] __initdata = {
131 #define BOARD_VEC(board) &board,
132 #include <asm/txx9/boards.h>
136 static struct txx9_board_vec *__init find_board_byname(const char *name)
140 /* search board_vecs table */
141 for (i = 0; i < ARRAY_SIZE(board_vecs); i++) {
142 if (strstr(board_vecs[i]->system, name))
143 return board_vecs[i];
148 static void __init prom_init_cmdline(void)
150 int argc = (int)fw_arg0;
151 int *argv32 = (int *)fw_arg1;
152 int i; /* Always ignore the "-c" at argv[0] */
153 char builtin[CL_SIZE];
155 /* ignore all built-in args if any f/w args given */
157 * But if built-in strings was started with '+', append them
158 * to command line args. If built-in was started with '-',
159 * ignore all f/w args.
162 if (arcs_cmdline[0] == '+')
163 strcpy(builtin, arcs_cmdline + 1);
164 else if (arcs_cmdline[0] == '-') {
165 strcpy(builtin, arcs_cmdline + 1);
167 } else if (argc <= 1)
168 strcpy(builtin, arcs_cmdline);
169 arcs_cmdline[0] = '\0';
171 for (i = 1; i < argc; i++) {
172 char *str = (char *)(long)argv32[i];
174 strcat(arcs_cmdline, " ");
175 if (strchr(str, ' ')) {
176 strcat(arcs_cmdline, "\"");
177 strcat(arcs_cmdline, str);
178 strcat(arcs_cmdline, "\"");
180 strcat(arcs_cmdline, str);
182 /* append saved builtin args */
185 strcat(arcs_cmdline, " ");
186 strcat(arcs_cmdline, builtin);
190 static int txx9_ic_disable __initdata;
191 static int txx9_dc_disable __initdata;
193 #if defined(CONFIG_CPU_TX49XX)
194 /* flush all cache on very early stage (before 4k_cache_init) */
195 static void __init early_flush_dcache(void)
197 unsigned int conf = read_c0_config();
198 unsigned int dc_size = 1 << (12 + ((conf & CONF_DC) >> 6));
199 unsigned int linesz = 32;
200 unsigned long addr, end;
202 end = INDEX_BASE + dc_size / 4;
204 for (addr = INDEX_BASE; addr < end; addr += linesz) {
205 cache_op(Index_Writeback_Inv_D, addr | 0);
206 cache_op(Index_Writeback_Inv_D, addr | 1);
207 cache_op(Index_Writeback_Inv_D, addr | 2);
208 cache_op(Index_Writeback_Inv_D, addr | 3);
212 static void __init txx9_cache_fixup(void)
216 conf = read_c0_config();
217 /* flush and disable */
218 if (txx9_ic_disable) {
219 conf |= TX49_CONF_IC;
220 write_c0_config(conf);
222 if (txx9_dc_disable) {
223 early_flush_dcache();
224 conf |= TX49_CONF_DC;
225 write_c0_config(conf);
229 conf = read_c0_config();
230 if (!txx9_ic_disable)
231 conf &= ~TX49_CONF_IC;
232 if (!txx9_dc_disable)
233 conf &= ~TX49_CONF_DC;
234 write_c0_config(conf);
236 if (conf & TX49_CONF_IC)
237 pr_info("TX49XX I-Cache disabled.\n");
238 if (conf & TX49_CONF_DC)
239 pr_info("TX49XX D-Cache disabled.\n");
241 #elif defined(CONFIG_CPU_TX39XX)
242 /* flush all cache on very early stage (before tx39_cache_init) */
243 static void __init early_flush_dcache(void)
245 unsigned int conf = read_c0_config();
246 unsigned int dc_size = 1 << (10 + ((conf & TX39_CONF_DCS_MASK) >>
247 TX39_CONF_DCS_SHIFT));
248 unsigned int linesz = 16;
249 unsigned long addr, end;
251 end = INDEX_BASE + dc_size / 2;
253 for (addr = INDEX_BASE; addr < end; addr += linesz) {
254 cache_op(Index_Writeback_Inv_D, addr | 0);
255 cache_op(Index_Writeback_Inv_D, addr | 1);
259 static void __init txx9_cache_fixup(void)
263 conf = read_c0_config();
264 /* flush and disable */
265 if (txx9_ic_disable) {
266 conf &= ~TX39_CONF_ICE;
267 write_c0_config(conf);
269 if (txx9_dc_disable) {
270 early_flush_dcache();
271 conf &= ~TX39_CONF_DCE;
272 write_c0_config(conf);
276 conf = read_c0_config();
277 if (!txx9_ic_disable)
278 conf |= TX39_CONF_ICE;
279 if (!txx9_dc_disable)
280 conf |= TX39_CONF_DCE;
281 write_c0_config(conf);
283 if (!(conf & TX39_CONF_ICE))
284 pr_info("TX39XX I-Cache disabled.\n");
285 if (!(conf & TX39_CONF_DCE))
286 pr_info("TX39XX D-Cache disabled.\n");
289 static inline void txx9_cache_fixup(void)
294 static void __init preprocess_cmdline(void)
296 char cmdline[CL_SIZE];
299 strcpy(cmdline, arcs_cmdline);
301 arcs_cmdline[0] = '\0';
303 char *str = strsep(&s, " ");
304 if (strncmp(str, "board=", 6) == 0) {
305 txx9_board_vec = find_board_byname(str + 6);
307 } else if (strncmp(str, "masterclk=", 10) == 0) {
309 if (strict_strtoul(str + 10, 10, &val) == 0)
310 txx9_master_clock = val;
312 } else if (strcmp(str, "icdisable") == 0) {
315 } else if (strcmp(str, "dcdisable") == 0) {
320 strcat(arcs_cmdline, " ");
321 strcat(arcs_cmdline, str);
327 static void __init select_board(void)
331 /* first, determine by "board=" argument in preprocess_cmdline() */
334 /* next, determine by "board" envvar */
335 envstr = prom_getenv("board");
337 txx9_board_vec = find_board_byname(envstr);
342 /* select "default" board */
343 #ifdef CONFIG_CPU_TX39XX
344 txx9_board_vec = &jmr3927_vec;
346 #ifdef CONFIG_CPU_TX49XX
347 switch (TX4938_REV_PCODE()) {
348 #ifdef CONFIG_TOSHIBA_RBTX4927
350 txx9_board_vec = &rbtx4927_vec;
353 txx9_board_vec = &rbtx4937_vec;
356 #ifdef CONFIG_TOSHIBA_RBTX4938
358 txx9_board_vec = &rbtx4938_vec;
365 void __init prom_init(void)
368 preprocess_cmdline();
371 strcpy(txx9_system_type, txx9_board_vec->system);
373 txx9_board_vec->prom_init();
376 void __init prom_free_prom_memory(void)
380 const char *get_system_type(void)
382 return txx9_system_type;
385 char * __init prom_getcmdline(void)
387 return &(arcs_cmdline[0]);
390 const char *__init prom_getenv(const char *name)
392 const s32 *str = (const s32 *)fw_arg2;
396 /* YAMON style ("name", "value" pairs) */
397 while (str[0] && str[1]) {
398 if (!strcmp((const char *)(unsigned long)str[0], name))
399 return (const char *)(unsigned long)str[1];
405 static void __noreturn txx9_machine_halt(void)
408 clear_c0_status(ST0_IM);
412 if (cpu_has_counter) {
414 * Clear counter interrupt while it
415 * breaks WAIT instruction even if
424 /* Watchdog support */
425 void __init txx9_wdt_init(unsigned long base)
427 struct resource res = {
429 .end = base + 0x100 - 1,
430 .flags = IORESOURCE_MEM,
432 platform_device_register_simple("txx9wdt", -1, &res, 1);
436 void __init txx9_spi_init(int busid, unsigned long base, int irq)
438 struct resource res[] = {
441 .end = base + 0x20 - 1,
442 .flags = IORESOURCE_MEM,
445 .flags = IORESOURCE_IRQ,
448 platform_device_register_simple("spi_txx9", busid,
449 res, ARRAY_SIZE(res));
452 void __init txx9_ethaddr_init(unsigned int id, unsigned char *ethaddr)
454 struct platform_device *pdev =
455 platform_device_alloc("tc35815-mac", id);
457 platform_device_add_data(pdev, ethaddr, 6) ||
458 platform_device_add(pdev))
459 platform_device_put(pdev);
462 void __init txx9_sio_init(unsigned long baseaddr, int irq,
463 unsigned int line, unsigned int sclk, int nocts)
465 #ifdef CONFIG_SERIAL_TXX9
466 struct uart_port req;
468 memset(&req, 0, sizeof(req));
470 req.iotype = UPIO_MEM;
471 req.membase = ioremap(baseaddr, 0x24);
472 req.mapbase = baseaddr;
475 req.flags |= UPF_BUGGY_UART /*HAVE_CTS_LINE*/;
477 req.flags |= UPF_MAGIC_MULTIPLIER /*USE_SCLK*/;
480 req.uartclk = TXX9_IMCLK;
481 early_serial_txx9_setup(&req);
482 #endif /* CONFIG_SERIAL_TXX9 */
485 #ifdef CONFIG_EARLY_PRINTK
486 static void __init null_prom_putchar(char c)
489 void (*txx9_prom_putchar)(char c) __initdata = null_prom_putchar;
491 void __init prom_putchar(char c)
493 txx9_prom_putchar(c);
496 static void __iomem *early_txx9_sio_port;
498 static void __init early_txx9_sio_putchar(char c)
500 #define TXX9_SICISR 0x0c
501 #define TXX9_SITFIFO 0x1c
502 #define TXX9_SICISR_TXALS 0x00000002
503 while (!(__raw_readl(early_txx9_sio_port + TXX9_SICISR) &
506 __raw_writel(c, early_txx9_sio_port + TXX9_SITFIFO);
509 void __init txx9_sio_putchar_init(unsigned long baseaddr)
511 early_txx9_sio_port = ioremap(baseaddr, 0x24);
512 txx9_prom_putchar = early_txx9_sio_putchar;
514 #endif /* CONFIG_EARLY_PRINTK */
517 void __init plat_mem_setup(void)
519 ioport_resource.start = 0;
520 ioport_resource.end = ~0UL; /* no limit */
521 iomem_resource.start = 0;
522 iomem_resource.end = ~0UL; /* no limit */
524 /* fallback restart/halt routines */
525 _machine_restart = (void (*)(char *))txx9_machine_halt;
526 _machine_halt = txx9_machine_halt;
527 pm_power_off = txx9_machine_halt;
530 pcibios_plat_setup = txx9_pcibios_setup;
532 txx9_board_vec->mem_setup();
535 void __init arch_init_irq(void)
537 txx9_board_vec->irq_setup();
540 void __init plat_time_init(void)
542 #ifdef CONFIG_CPU_TX49XX
543 mips_hpt_frequency = txx9_cpu_clock / 2;
545 txx9_board_vec->time_init();
548 static int __init _txx9_arch_init(void)
550 if (txx9_board_vec->arch_init)
551 txx9_board_vec->arch_init();
554 arch_initcall(_txx9_arch_init);
556 static int __init _txx9_device_init(void)
558 if (txx9_board_vec->device_init)
559 txx9_board_vec->device_init();
562 device_initcall(_txx9_device_init);
564 int (*txx9_irq_dispatch)(int pending);
565 asmlinkage void plat_irq_dispatch(void)
567 int pending = read_c0_status() & read_c0_cause() & ST0_IM;
568 int irq = txx9_irq_dispatch(pending);
570 if (likely(irq >= 0))
573 spurious_interrupt();
576 /* see include/asm-mips/mach-tx39xx/mangle-port.h, for example. */
577 #ifdef NEEDS_TXX9_SWIZZLE_ADDR_B
578 static unsigned long __swizzle_addr_none(unsigned long port)
582 unsigned long (*__swizzle_addr_b)(unsigned long port) = __swizzle_addr_none;
583 EXPORT_SYMBOL(__swizzle_addr_b);