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Atsushi Nemoto89d63fe2008-07-11 00:33:08 +09001/*
2 * linux/arch/mips/txx9/generic/setup.c
3 *
4 * Based on linux/arch/mips/txx9/rbtx4938/setup.c,
5 * and RBTX49xx patch from CELF patch archive.
6 *
7 * 2003-2005 (c) MontaVista Software, Inc.
8 * (C) Copyright TOSHIBA CORPORATION 2000-2001, 2004-2007
9 *
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
12 * for more details.
13 */
14#include <linux/init.h>
15#include <linux/kernel.h>
16#include <linux/types.h>
Atsushi Nemotoedcaf1a2008-07-11 23:27:54 +090017#include <linux/interrupt.h>
18#include <linux/string.h>
19#include <linux/module.h>
20#include <linux/clk.h>
21#include <linux/err.h>
Atsushi Nemotoe0eb7302008-07-19 01:51:52 +090022#include <linux/gpio.h>
Atsushi Nemoto68314722008-07-24 00:25:18 +090023#include <linux/platform_device.h>
Atsushi Nemoto7779a5e2008-07-25 23:08:06 +090024#include <linux/serial_core.h>
Atsushi Nemotoedcaf1a2008-07-11 23:27:54 +090025#include <asm/bootinfo.h>
Atsushi Nemotoe0eb7302008-07-19 01:51:52 +090026#include <asm/time.h>
Atsushi Nemotoa49297e2008-07-24 00:25:17 +090027#include <asm/reboot.h>
Atsushi Nemoto89d63fe2008-07-11 00:33:08 +090028#include <asm/txx9/generic.h>
Atsushi Nemoto07517522008-07-24 00:25:15 +090029#include <asm/txx9/pci.h>
Atsushi Nemotoedcaf1a2008-07-11 23:27:54 +090030#ifdef CONFIG_CPU_TX49XX
31#include <asm/txx9/tx4938.h>
32#endif
Atsushi Nemoto89d63fe2008-07-11 00:33:08 +090033
34/* EBUSC settings of TX4927, etc. */
35struct resource txx9_ce_res[8];
36static char txx9_ce_res_name[8][4]; /* "CEn" */
37
38/* pcode, internal register */
Atsushi Nemoto94a4c322008-07-19 01:51:47 +090039unsigned int txx9_pcode;
Atsushi Nemoto89d63fe2008-07-11 00:33:08 +090040char txx9_pcode_str[8];
41static struct resource txx9_reg_res = {
42 .name = txx9_pcode_str,
43 .flags = IORESOURCE_MEM,
44};
45void __init
46txx9_reg_res_init(unsigned int pcode, unsigned long base, unsigned long size)
47{
48 int i;
49
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];
54 }
55
56 sprintf(txx9_pcode_str, "TX%x", pcode);
57 if (base) {
58 txx9_reg_res.start = base & 0xfffffffffULL;
59 txx9_reg_res.end = (base & 0xfffffffffULL) + (size - 1);
60 request_resource(&iomem_resource, &txx9_reg_res);
61 }
62}
63
64/* clocks */
65unsigned int txx9_master_clock;
66unsigned int txx9_cpu_clock;
67unsigned int txx9_gbus_clock;
Atsushi Nemotoedcaf1a2008-07-11 23:27:54 +090068
Atsushi Nemoto94a4c322008-07-19 01:51:47 +090069int txx9_ccfg_toeon __initdata = 1;
Atsushi Nemotoedcaf1a2008-07-11 23:27:54 +090070
71/* Minimum CLK support */
72
73struct clk *clk_get(struct device *dev, const char *id)
74{
75 if (!strcmp(id, "spi-baseclk"))
Atsushi Nemoto94a4c322008-07-19 01:51:47 +090076 return (struct clk *)((unsigned long)txx9_gbus_clock / 2 / 4);
Atsushi Nemotoedcaf1a2008-07-11 23:27:54 +090077 if (!strcmp(id, "imbus_clk"))
Atsushi Nemoto94a4c322008-07-19 01:51:47 +090078 return (struct clk *)((unsigned long)txx9_gbus_clock / 2);
Atsushi Nemotoedcaf1a2008-07-11 23:27:54 +090079 return ERR_PTR(-ENOENT);
80}
81EXPORT_SYMBOL(clk_get);
82
83int clk_enable(struct clk *clk)
84{
85 return 0;
86}
87EXPORT_SYMBOL(clk_enable);
88
89void clk_disable(struct clk *clk)
90{
91}
92EXPORT_SYMBOL(clk_disable);
93
94unsigned long clk_get_rate(struct clk *clk)
95{
96 return (unsigned long)clk;
97}
98EXPORT_SYMBOL(clk_get_rate);
99
100void clk_put(struct clk *clk)
101{
102}
103EXPORT_SYMBOL(clk_put);
104
Atsushi Nemoto8d795f22008-07-18 00:43:48 +0900105/* GPIO support */
106
107#ifdef CONFIG_GENERIC_GPIO
108int gpio_to_irq(unsigned gpio)
109{
110 return -EINVAL;
111}
112EXPORT_SYMBOL(gpio_to_irq);
113
114int irq_to_gpio(unsigned irq)
115{
116 return -EINVAL;
117}
118EXPORT_SYMBOL(irq_to_gpio);
119#endif
120
Atsushi Nemotoedcaf1a2008-07-11 23:27:54 +0900121extern struct txx9_board_vec jmr3927_vec;
122extern struct txx9_board_vec rbtx4927_vec;
123extern struct txx9_board_vec rbtx4937_vec;
124extern struct txx9_board_vec rbtx4938_vec;
125
Atsushi Nemotoedcaf1a2008-07-11 23:27:54 +0900126struct txx9_board_vec *txx9_board_vec __initdata;
127static char txx9_system_type[32];
128
129void __init prom_init_cmdline(void)
130{
131 int argc = (int)fw_arg0;
132 char **argv = (char **)fw_arg1;
133 int i; /* Always ignore the "-c" at argv[0] */
Atsushi Nemoto94a4c322008-07-19 01:51:47 +0900134#ifdef CONFIG_64BIT
135 char *fixed_argv[32];
136 for (i = 0; i < argc; i++)
137 fixed_argv[i] = (char *)(long)(*((__s32 *)argv + i));
138 argv = fixed_argv;
139#endif
Atsushi Nemotoedcaf1a2008-07-11 23:27:54 +0900140
141 /* ignore all built-in args if any f/w args given */
142 if (argc > 1)
143 *arcs_cmdline = '\0';
144
145 for (i = 1; i < argc; i++) {
146 if (i != 1)
147 strcat(arcs_cmdline, " ");
148 strcat(arcs_cmdline, argv[i]);
149 }
150}
151
152void __init prom_init(void)
153{
Atsushi Nemotoedcaf1a2008-07-11 23:27:54 +0900154#ifdef CONFIG_CPU_TX39XX
Yoichi Yuasa7a1fdf12008-07-13 19:51:55 +0900155 txx9_board_vec = &jmr3927_vec;
Atsushi Nemotoedcaf1a2008-07-11 23:27:54 +0900156#endif
157#ifdef CONFIG_CPU_TX49XX
158 switch (TX4938_REV_PCODE()) {
Atsushi Nemoto8d795f22008-07-18 00:43:48 +0900159#ifdef CONFIG_TOSHIBA_RBTX4927
Atsushi Nemotoedcaf1a2008-07-11 23:27:54 +0900160 case 0x4927:
Yoichi Yuasa7a1fdf12008-07-13 19:51:55 +0900161 txx9_board_vec = &rbtx4927_vec;
Atsushi Nemotoedcaf1a2008-07-11 23:27:54 +0900162 break;
163 case 0x4937:
Yoichi Yuasa7a1fdf12008-07-13 19:51:55 +0900164 txx9_board_vec = &rbtx4937_vec;
Atsushi Nemotoedcaf1a2008-07-11 23:27:54 +0900165 break;
Atsushi Nemoto8d795f22008-07-18 00:43:48 +0900166#endif
167#ifdef CONFIG_TOSHIBA_RBTX4938
Atsushi Nemotoedcaf1a2008-07-11 23:27:54 +0900168 case 0x4938:
Yoichi Yuasa7a1fdf12008-07-13 19:51:55 +0900169 txx9_board_vec = &rbtx4938_vec;
Atsushi Nemotoedcaf1a2008-07-11 23:27:54 +0900170 break;
Atsushi Nemoto8d795f22008-07-18 00:43:48 +0900171#endif
Atsushi Nemotoedcaf1a2008-07-11 23:27:54 +0900172 }
173#endif
Yoichi Yuasa7a1fdf12008-07-13 19:51:55 +0900174
175 strcpy(txx9_system_type, txx9_board_vec->system);
176
Atsushi Nemoto7b226092008-07-14 00:15:04 +0900177 txx9_board_vec->prom_init();
Atsushi Nemotoedcaf1a2008-07-11 23:27:54 +0900178}
179
180void __init prom_free_prom_memory(void)
181{
182}
183
184const char *get_system_type(void)
185{
186 return txx9_system_type;
187}
188
189char * __init prom_getcmdline(void)
190{
191 return &(arcs_cmdline[0]);
192}
193
Atsushi Nemotoa49297e2008-07-24 00:25:17 +0900194static void __noreturn txx9_machine_halt(void)
195{
196 local_irq_disable();
197 clear_c0_status(ST0_IM);
198 while (1) {
199 if (cpu_wait) {
200 (*cpu_wait)();
201 if (cpu_has_counter) {
202 /*
203 * Clear counter interrupt while it
204 * breaks WAIT instruction even if
205 * masked.
206 */
207 write_c0_compare(0);
208 }
209 }
210 }
211}
212
Atsushi Nemoto68314722008-07-24 00:25:18 +0900213/* Watchdog support */
214void __init txx9_wdt_init(unsigned long base)
215{
216 struct resource res = {
217 .start = base,
218 .end = base + 0x100 - 1,
219 .flags = IORESOURCE_MEM,
220 };
221 platform_device_register_simple("txx9wdt", -1, &res, 1);
222}
223
Atsushi Nemotoc49f91f2008-07-24 00:25:20 +0900224/* SPI support */
225void __init txx9_spi_init(int busid, unsigned long base, int irq)
226{
227 struct resource res[] = {
228 {
229 .start = base,
230 .end = base + 0x20 - 1,
231 .flags = IORESOURCE_MEM,
232 }, {
233 .start = irq,
234 .flags = IORESOURCE_IRQ,
235 },
236 };
237 platform_device_register_simple("spi_txx9", busid,
238 res, ARRAY_SIZE(res));
239}
240
241void __init txx9_ethaddr_init(unsigned int id, unsigned char *ethaddr)
242{
243 struct platform_device *pdev =
244 platform_device_alloc("tc35815-mac", id);
245 if (!pdev ||
246 platform_device_add_data(pdev, ethaddr, 6) ||
247 platform_device_add(pdev))
248 platform_device_put(pdev);
249}
250
Atsushi Nemoto7779a5e2008-07-25 23:08:06 +0900251void __init txx9_sio_init(unsigned long baseaddr, int irq,
252 unsigned int line, unsigned int sclk, int nocts)
253{
254#ifdef CONFIG_SERIAL_TXX9
255 struct uart_port req;
256
257 memset(&req, 0, sizeof(req));
258 req.line = line;
259 req.iotype = UPIO_MEM;
260 req.membase = ioremap(baseaddr, 0x24);
261 req.mapbase = baseaddr;
262 req.irq = irq;
263 if (!nocts)
264 req.flags |= UPF_BUGGY_UART /*HAVE_CTS_LINE*/;
265 if (sclk) {
266 req.flags |= UPF_MAGIC_MULTIPLIER /*USE_SCLK*/;
267 req.uartclk = sclk;
268 } else
269 req.uartclk = TXX9_IMCLK;
270 early_serial_txx9_setup(&req);
271#endif /* CONFIG_SERIAL_TXX9 */
272}
273
Atsushi Nemotoe3529532008-07-29 22:10:08 +0900274#ifdef CONFIG_EARLY_PRINTK
275static void __init null_prom_putchar(char c)
276{
277}
278void (*txx9_prom_putchar)(char c) __initdata = null_prom_putchar;
279
280void __init prom_putchar(char c)
281{
282 txx9_prom_putchar(c);
283}
284
285static void __iomem *early_txx9_sio_port;
286
287static void __init early_txx9_sio_putchar(char c)
288{
289#define TXX9_SICISR 0x0c
290#define TXX9_SITFIFO 0x1c
291#define TXX9_SICISR_TXALS 0x00000002
292 while (!(__raw_readl(early_txx9_sio_port + TXX9_SICISR) &
293 TXX9_SICISR_TXALS))
294 ;
295 __raw_writel(c, early_txx9_sio_port + TXX9_SITFIFO);
296}
297
298void __init txx9_sio_putchar_init(unsigned long baseaddr)
299{
300 early_txx9_sio_port = ioremap(baseaddr, 0x24);
301 txx9_prom_putchar = early_txx9_sio_putchar;
302}
303#endif /* CONFIG_EARLY_PRINTK */
304
Atsushi Nemotoedcaf1a2008-07-11 23:27:54 +0900305/* wrappers */
306void __init plat_mem_setup(void)
307{
Atsushi Nemoto94a4c322008-07-19 01:51:47 +0900308 ioport_resource.start = 0;
309 ioport_resource.end = ~0UL; /* no limit */
310 iomem_resource.start = 0;
311 iomem_resource.end = ~0UL; /* no limit */
Atsushi Nemotoa49297e2008-07-24 00:25:17 +0900312
313 /* fallback restart/halt routines */
314 _machine_restart = (void (*)(char *))txx9_machine_halt;
315 _machine_halt = txx9_machine_halt;
316 pm_power_off = txx9_machine_halt;
317
Atsushi Nemoto07517522008-07-24 00:25:15 +0900318#ifdef CONFIG_PCI
319 pcibios_plat_setup = txx9_pcibios_setup;
320#endif
Atsushi Nemotoedcaf1a2008-07-11 23:27:54 +0900321 txx9_board_vec->mem_setup();
322}
323
324void __init arch_init_irq(void)
325{
326 txx9_board_vec->irq_setup();
327}
328
329void __init plat_time_init(void)
330{
Atsushi Nemoto1374d082008-07-31 22:29:53 +0900331#ifdef CONFIG_CPU_TX49XX
332 mips_hpt_frequency = txx9_cpu_clock / 2;
333#endif
Atsushi Nemotoedcaf1a2008-07-11 23:27:54 +0900334 txx9_board_vec->time_init();
335}
336
337static int __init _txx9_arch_init(void)
338{
339 if (txx9_board_vec->arch_init)
340 txx9_board_vec->arch_init();
341 return 0;
342}
343arch_initcall(_txx9_arch_init);
344
345static int __init _txx9_device_init(void)
346{
347 if (txx9_board_vec->device_init)
348 txx9_board_vec->device_init();
349 return 0;
350}
351device_initcall(_txx9_device_init);
352
353int (*txx9_irq_dispatch)(int pending);
354asmlinkage void plat_irq_dispatch(void)
355{
356 int pending = read_c0_status() & read_c0_cause() & ST0_IM;
357 int irq = txx9_irq_dispatch(pending);
358
359 if (likely(irq >= 0))
360 do_IRQ(irq);
361 else
362 spurious_interrupt();
363}
Atsushi Nemoto4c642f32008-07-13 23:37:56 +0900364
365/* see include/asm-mips/mach-tx39xx/mangle-port.h, for example. */
366#ifdef NEEDS_TXX9_SWIZZLE_ADDR_B
367static unsigned long __swizzle_addr_none(unsigned long port)
368{
369 return port;
370}
371unsigned long (*__swizzle_addr_b)(unsigned long port) = __swizzle_addr_none;
372EXPORT_SYMBOL(__swizzle_addr_b);
373#endif