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/txx9/generic.h>
29 #include <asm/txx9/pci.h>
30 #ifdef CONFIG_CPU_TX49XX
31 #include <asm/txx9/tx4938.h>
34 /* EBUSC settings of TX4927, etc. */
35 struct resource txx9_ce_res[8];
36 static char txx9_ce_res_name[8][4]; /* "CEn" */
38 /* pcode, internal register */
39 unsigned int txx9_pcode;
40 char txx9_pcode_str[8];
41 static struct resource txx9_reg_res = {
42 .name = txx9_pcode_str,
43 .flags = IORESOURCE_MEM,
46 txx9_reg_res_init(unsigned int pcode, unsigned long base, unsigned long size)
50 for (i = 0; i < ARRAY_SIZE(txx9_ce_res); i++) {
51 sprintf(txx9_ce_res_name[i], "CE%d", i);
52 txx9_ce_res[i].flags = IORESOURCE_MEM;
53 txx9_ce_res[i].name = txx9_ce_res_name[i];
57 sprintf(txx9_pcode_str, "TX%x", pcode);
59 txx9_reg_res.start = base & 0xfffffffffULL;
60 txx9_reg_res.end = (base & 0xfffffffffULL) + (size - 1);
61 request_resource(&iomem_resource, &txx9_reg_res);
66 unsigned int txx9_master_clock;
67 unsigned int txx9_cpu_clock;
68 unsigned int txx9_gbus_clock;
70 int txx9_ccfg_toeon __initdata = 1;
72 /* Minimum CLK support */
74 struct clk *clk_get(struct device *dev, const char *id)
76 if (!strcmp(id, "spi-baseclk"))
77 return (struct clk *)((unsigned long)txx9_gbus_clock / 2 / 4);
78 if (!strcmp(id, "imbus_clk"))
79 return (struct clk *)((unsigned long)txx9_gbus_clock / 2);
80 return ERR_PTR(-ENOENT);
82 EXPORT_SYMBOL(clk_get);
84 int clk_enable(struct clk *clk)
88 EXPORT_SYMBOL(clk_enable);
90 void clk_disable(struct clk *clk)
93 EXPORT_SYMBOL(clk_disable);
95 unsigned long clk_get_rate(struct clk *clk)
97 return (unsigned long)clk;
99 EXPORT_SYMBOL(clk_get_rate);
101 void clk_put(struct clk *clk)
104 EXPORT_SYMBOL(clk_put);
108 #ifdef CONFIG_GENERIC_GPIO
109 int gpio_to_irq(unsigned gpio)
113 EXPORT_SYMBOL(gpio_to_irq);
115 int irq_to_gpio(unsigned irq)
119 EXPORT_SYMBOL(irq_to_gpio);
122 extern struct txx9_board_vec jmr3927_vec;
123 extern struct txx9_board_vec rbtx4927_vec;
124 extern struct txx9_board_vec rbtx4937_vec;
125 extern struct txx9_board_vec rbtx4938_vec;
127 struct txx9_board_vec *txx9_board_vec __initdata;
128 static char txx9_system_type[32];
130 static void __init prom_init_cmdline(void)
132 int argc = (int)fw_arg0;
133 int *argv32 = (int *)fw_arg1;
134 int i; /* Always ignore the "-c" at argv[0] */
135 char builtin[CL_SIZE];
137 /* ignore all built-in args if any f/w args given */
139 * But if built-in strings was started with '+', append them
140 * to command line args. If built-in was started with '-',
141 * ignore all f/w args.
144 if (arcs_cmdline[0] == '+')
145 strcpy(builtin, arcs_cmdline + 1);
146 else if (arcs_cmdline[0] == '-') {
147 strcpy(builtin, arcs_cmdline + 1);
149 } else if (argc <= 1)
150 strcpy(builtin, arcs_cmdline);
151 arcs_cmdline[0] = '\0';
153 for (i = 1; i < argc; i++) {
154 char *str = (char *)(long)argv32[i];
156 strcat(arcs_cmdline, " ");
157 if (strchr(str, ' ')) {
158 strcat(arcs_cmdline, "\"");
159 strcat(arcs_cmdline, str);
160 strcat(arcs_cmdline, "\"");
162 strcat(arcs_cmdline, str);
164 /* append saved builtin args */
167 strcat(arcs_cmdline, " ");
168 strcat(arcs_cmdline, builtin);
172 void __init prom_init(void)
175 #ifdef CONFIG_CPU_TX39XX
176 txx9_board_vec = &jmr3927_vec;
178 #ifdef CONFIG_CPU_TX49XX
179 switch (TX4938_REV_PCODE()) {
180 #ifdef CONFIG_TOSHIBA_RBTX4927
182 txx9_board_vec = &rbtx4927_vec;
185 txx9_board_vec = &rbtx4937_vec;
188 #ifdef CONFIG_TOSHIBA_RBTX4938
190 txx9_board_vec = &rbtx4938_vec;
196 strcpy(txx9_system_type, txx9_board_vec->system);
198 txx9_board_vec->prom_init();
201 void __init prom_free_prom_memory(void)
205 const char *get_system_type(void)
207 return txx9_system_type;
210 char * __init prom_getcmdline(void)
212 return &(arcs_cmdline[0]);
215 const char *__init prom_getenv(const char *name)
217 const s32 *str = (const s32 *)fw_arg2;
221 /* YAMON style ("name", "value" pairs) */
222 while (str[0] && str[1]) {
223 if (!strcmp((const char *)(unsigned long)str[0], name))
224 return (const char *)(unsigned long)str[1];
230 static void __noreturn txx9_machine_halt(void)
233 clear_c0_status(ST0_IM);
237 if (cpu_has_counter) {
239 * Clear counter interrupt while it
240 * breaks WAIT instruction even if
249 /* Watchdog support */
250 void __init txx9_wdt_init(unsigned long base)
252 struct resource res = {
254 .end = base + 0x100 - 1,
255 .flags = IORESOURCE_MEM,
257 platform_device_register_simple("txx9wdt", -1, &res, 1);
261 void __init txx9_spi_init(int busid, unsigned long base, int irq)
263 struct resource res[] = {
266 .end = base + 0x20 - 1,
267 .flags = IORESOURCE_MEM,
270 .flags = IORESOURCE_IRQ,
273 platform_device_register_simple("spi_txx9", busid,
274 res, ARRAY_SIZE(res));
277 void __init txx9_ethaddr_init(unsigned int id, unsigned char *ethaddr)
279 struct platform_device *pdev =
280 platform_device_alloc("tc35815-mac", id);
282 platform_device_add_data(pdev, ethaddr, 6) ||
283 platform_device_add(pdev))
284 platform_device_put(pdev);
287 void __init txx9_sio_init(unsigned long baseaddr, int irq,
288 unsigned int line, unsigned int sclk, int nocts)
290 #ifdef CONFIG_SERIAL_TXX9
291 struct uart_port req;
293 memset(&req, 0, sizeof(req));
295 req.iotype = UPIO_MEM;
296 req.membase = ioremap(baseaddr, 0x24);
297 req.mapbase = baseaddr;
300 req.flags |= UPF_BUGGY_UART /*HAVE_CTS_LINE*/;
302 req.flags |= UPF_MAGIC_MULTIPLIER /*USE_SCLK*/;
305 req.uartclk = TXX9_IMCLK;
306 early_serial_txx9_setup(&req);
307 #endif /* CONFIG_SERIAL_TXX9 */
310 #ifdef CONFIG_EARLY_PRINTK
311 static void __init null_prom_putchar(char c)
314 void (*txx9_prom_putchar)(char c) __initdata = null_prom_putchar;
316 void __init prom_putchar(char c)
318 txx9_prom_putchar(c);
321 static void __iomem *early_txx9_sio_port;
323 static void __init early_txx9_sio_putchar(char c)
325 #define TXX9_SICISR 0x0c
326 #define TXX9_SITFIFO 0x1c
327 #define TXX9_SICISR_TXALS 0x00000002
328 while (!(__raw_readl(early_txx9_sio_port + TXX9_SICISR) &
331 __raw_writel(c, early_txx9_sio_port + TXX9_SITFIFO);
334 void __init txx9_sio_putchar_init(unsigned long baseaddr)
336 early_txx9_sio_port = ioremap(baseaddr, 0x24);
337 txx9_prom_putchar = early_txx9_sio_putchar;
339 #endif /* CONFIG_EARLY_PRINTK */
342 void __init plat_mem_setup(void)
344 ioport_resource.start = 0;
345 ioport_resource.end = ~0UL; /* no limit */
346 iomem_resource.start = 0;
347 iomem_resource.end = ~0UL; /* no limit */
349 /* fallback restart/halt routines */
350 _machine_restart = (void (*)(char *))txx9_machine_halt;
351 _machine_halt = txx9_machine_halt;
352 pm_power_off = txx9_machine_halt;
355 pcibios_plat_setup = txx9_pcibios_setup;
357 txx9_board_vec->mem_setup();
360 void __init arch_init_irq(void)
362 txx9_board_vec->irq_setup();
365 void __init plat_time_init(void)
367 #ifdef CONFIG_CPU_TX49XX
368 mips_hpt_frequency = txx9_cpu_clock / 2;
370 txx9_board_vec->time_init();
373 static int __init _txx9_arch_init(void)
375 if (txx9_board_vec->arch_init)
376 txx9_board_vec->arch_init();
379 arch_initcall(_txx9_arch_init);
381 static int __init _txx9_device_init(void)
383 if (txx9_board_vec->device_init)
384 txx9_board_vec->device_init();
387 device_initcall(_txx9_device_init);
389 int (*txx9_irq_dispatch)(int pending);
390 asmlinkage void plat_irq_dispatch(void)
392 int pending = read_c0_status() & read_c0_cause() & ST0_IM;
393 int irq = txx9_irq_dispatch(pending);
395 if (likely(irq >= 0))
398 spurious_interrupt();
401 /* see include/asm-mips/mach-tx39xx/mangle-port.h, for example. */
402 #ifdef NEEDS_TXX9_SWIZZLE_ADDR_B
403 static unsigned long __swizzle_addr_none(unsigned long port)
407 unsigned long (*__swizzle_addr_b)(unsigned long port) = __swizzle_addr_none;
408 EXPORT_SYMBOL(__swizzle_addr_b);