1 /* 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> 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> 26 #include <asm/time.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> 32 #endif 33 34 /* EBUSC settings of TX4927, etc. */ 35 struct resource txx9_ce_res[8]; 36 static char txx9_ce_res_name[8][4]; /* "CEn" */ 37 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, 44 }; 45 void __init 46 txx9_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 txx9_pcode = pcode; 57 sprintf(txx9_pcode_str, "TX%x", pcode); 58 if (base) { 59 txx9_reg_res.start = base & 0xfffffffffULL; 60 txx9_reg_res.end = (base & 0xfffffffffULL) + (size - 1); 61 request_resource(&iomem_resource, &txx9_reg_res); 62 } 63 } 64 65 /* clocks */ 66 unsigned int txx9_master_clock; 67 unsigned int txx9_cpu_clock; 68 unsigned int txx9_gbus_clock; 69 70 int txx9_ccfg_toeon __initdata = 1; 71 72 /* Minimum CLK support */ 73 74 struct clk *clk_get(struct device *dev, const char *id) 75 { 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); 81 } 82 EXPORT_SYMBOL(clk_get); 83 84 int clk_enable(struct clk *clk) 85 { 86 return 0; 87 } 88 EXPORT_SYMBOL(clk_enable); 89 90 void clk_disable(struct clk *clk) 91 { 92 } 93 EXPORT_SYMBOL(clk_disable); 94 95 unsigned long clk_get_rate(struct clk *clk) 96 { 97 return (unsigned long)clk; 98 } 99 EXPORT_SYMBOL(clk_get_rate); 100 101 void clk_put(struct clk *clk) 102 { 103 } 104 EXPORT_SYMBOL(clk_put); 105 106 /* GPIO support */ 107 108 #ifdef CONFIG_GENERIC_GPIO 109 int gpio_to_irq(unsigned gpio) 110 { 111 return -EINVAL; 112 } 113 EXPORT_SYMBOL(gpio_to_irq); 114 115 int irq_to_gpio(unsigned irq) 116 { 117 return -EINVAL; 118 } 119 EXPORT_SYMBOL(irq_to_gpio); 120 #endif 121 122 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; 126 127 struct txx9_board_vec *txx9_board_vec __initdata; 128 static char txx9_system_type[32]; 129 130 static void __init prom_init_cmdline(void) 131 { 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]; 136 137 /* ignore all built-in args if any f/w args given */ 138 /* 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. 142 */ 143 builtin[0] = '\0'; 144 if (arcs_cmdline[0] == '+') 145 strcpy(builtin, arcs_cmdline + 1); 146 else if (arcs_cmdline[0] == '-') { 147 strcpy(builtin, arcs_cmdline + 1); 148 argc = 0; 149 } else if (argc <= 1) 150 strcpy(builtin, arcs_cmdline); 151 arcs_cmdline[0] = '\0'; 152 153 for (i = 1; i < argc; i++) { 154 char *str = (char *)(long)argv32[i]; 155 if (i != 1) 156 strcat(arcs_cmdline, " "); 157 if (strchr(str, ' ')) { 158 strcat(arcs_cmdline, "\""); 159 strcat(arcs_cmdline, str); 160 strcat(arcs_cmdline, "\""); 161 } else 162 strcat(arcs_cmdline, str); 163 } 164 /* append saved builtin args */ 165 if (builtin[0]) { 166 if (arcs_cmdline[0]) 167 strcat(arcs_cmdline, " "); 168 strcat(arcs_cmdline, builtin); 169 } 170 } 171 172 void __init prom_init(void) 173 { 174 prom_init_cmdline(); 175 #ifdef CONFIG_CPU_TX39XX 176 txx9_board_vec = &jmr3927_vec; 177 #endif 178 #ifdef CONFIG_CPU_TX49XX 179 switch (TX4938_REV_PCODE()) { 180 #ifdef CONFIG_TOSHIBA_RBTX4927 181 case 0x4927: 182 txx9_board_vec = &rbtx4927_vec; 183 break; 184 case 0x4937: 185 txx9_board_vec = &rbtx4937_vec; 186 break; 187 #endif 188 #ifdef CONFIG_TOSHIBA_RBTX4938 189 case 0x4938: 190 txx9_board_vec = &rbtx4938_vec; 191 break; 192 #endif 193 } 194 #endif 195 196 strcpy(txx9_system_type, txx9_board_vec->system); 197 198 txx9_board_vec->prom_init(); 199 } 200 201 void __init prom_free_prom_memory(void) 202 { 203 } 204 205 const char *get_system_type(void) 206 { 207 return txx9_system_type; 208 } 209 210 char * __init prom_getcmdline(void) 211 { 212 return &(arcs_cmdline[0]); 213 } 214 215 static void __noreturn txx9_machine_halt(void) 216 { 217 local_irq_disable(); 218 clear_c0_status(ST0_IM); 219 while (1) { 220 if (cpu_wait) { 221 (*cpu_wait)(); 222 if (cpu_has_counter) { 223 /* 224 * Clear counter interrupt while it 225 * breaks WAIT instruction even if 226 * masked. 227 */ 228 write_c0_compare(0); 229 } 230 } 231 } 232 } 233 234 /* Watchdog support */ 235 void __init txx9_wdt_init(unsigned long base) 236 { 237 struct resource res = { 238 .start = base, 239 .end = base + 0x100 - 1, 240 .flags = IORESOURCE_MEM, 241 }; 242 platform_device_register_simple("txx9wdt", -1, &res, 1); 243 } 244 245 /* SPI support */ 246 void __init txx9_spi_init(int busid, unsigned long base, int irq) 247 { 248 struct resource res[] = { 249 { 250 .start = base, 251 .end = base + 0x20 - 1, 252 .flags = IORESOURCE_MEM, 253 }, { 254 .start = irq, 255 .flags = IORESOURCE_IRQ, 256 }, 257 }; 258 platform_device_register_simple("spi_txx9", busid, 259 res, ARRAY_SIZE(res)); 260 } 261 262 void __init txx9_ethaddr_init(unsigned int id, unsigned char *ethaddr) 263 { 264 struct platform_device *pdev = 265 platform_device_alloc("tc35815-mac", id); 266 if (!pdev || 267 platform_device_add_data(pdev, ethaddr, 6) || 268 platform_device_add(pdev)) 269 platform_device_put(pdev); 270 } 271 272 void __init txx9_sio_init(unsigned long baseaddr, int irq, 273 unsigned int line, unsigned int sclk, int nocts) 274 { 275 #ifdef CONFIG_SERIAL_TXX9 276 struct uart_port req; 277 278 memset(&req, 0, sizeof(req)); 279 req.line = line; 280 req.iotype = UPIO_MEM; 281 req.membase = ioremap(baseaddr, 0x24); 282 req.mapbase = baseaddr; 283 req.irq = irq; 284 if (!nocts) 285 req.flags |= UPF_BUGGY_UART /*HAVE_CTS_LINE*/; 286 if (sclk) { 287 req.flags |= UPF_MAGIC_MULTIPLIER /*USE_SCLK*/; 288 req.uartclk = sclk; 289 } else 290 req.uartclk = TXX9_IMCLK; 291 early_serial_txx9_setup(&req); 292 #endif /* CONFIG_SERIAL_TXX9 */ 293 } 294 295 #ifdef CONFIG_EARLY_PRINTK 296 static void __init null_prom_putchar(char c) 297 { 298 } 299 void (*txx9_prom_putchar)(char c) __initdata = null_prom_putchar; 300 301 void __init prom_putchar(char c) 302 { 303 txx9_prom_putchar(c); 304 } 305 306 static void __iomem *early_txx9_sio_port; 307 308 static void __init early_txx9_sio_putchar(char c) 309 { 310 #define TXX9_SICISR 0x0c 311 #define TXX9_SITFIFO 0x1c 312 #define TXX9_SICISR_TXALS 0x00000002 313 while (!(__raw_readl(early_txx9_sio_port + TXX9_SICISR) & 314 TXX9_SICISR_TXALS)) 315 ; 316 __raw_writel(c, early_txx9_sio_port + TXX9_SITFIFO); 317 } 318 319 void __init txx9_sio_putchar_init(unsigned long baseaddr) 320 { 321 early_txx9_sio_port = ioremap(baseaddr, 0x24); 322 txx9_prom_putchar = early_txx9_sio_putchar; 323 } 324 #endif /* CONFIG_EARLY_PRINTK */ 325 326 /* wrappers */ 327 void __init plat_mem_setup(void) 328 { 329 ioport_resource.start = 0; 330 ioport_resource.end = ~0UL; /* no limit */ 331 iomem_resource.start = 0; 332 iomem_resource.end = ~0UL; /* no limit */ 333 334 /* fallback restart/halt routines */ 335 _machine_restart = (void (*)(char *))txx9_machine_halt; 336 _machine_halt = txx9_machine_halt; 337 pm_power_off = txx9_machine_halt; 338 339 #ifdef CONFIG_PCI 340 pcibios_plat_setup = txx9_pcibios_setup; 341 #endif 342 txx9_board_vec->mem_setup(); 343 } 344 345 void __init arch_init_irq(void) 346 { 347 txx9_board_vec->irq_setup(); 348 } 349 350 void __init plat_time_init(void) 351 { 352 #ifdef CONFIG_CPU_TX49XX 353 mips_hpt_frequency = txx9_cpu_clock / 2; 354 #endif 355 txx9_board_vec->time_init(); 356 } 357 358 static int __init _txx9_arch_init(void) 359 { 360 if (txx9_board_vec->arch_init) 361 txx9_board_vec->arch_init(); 362 return 0; 363 } 364 arch_initcall(_txx9_arch_init); 365 366 static int __init _txx9_device_init(void) 367 { 368 if (txx9_board_vec->device_init) 369 txx9_board_vec->device_init(); 370 return 0; 371 } 372 device_initcall(_txx9_device_init); 373 374 int (*txx9_irq_dispatch)(int pending); 375 asmlinkage void plat_irq_dispatch(void) 376 { 377 int pending = read_c0_status() & read_c0_cause() & ST0_IM; 378 int irq = txx9_irq_dispatch(pending); 379 380 if (likely(irq >= 0)) 381 do_IRQ(irq); 382 else 383 spurious_interrupt(); 384 } 385 386 /* see include/asm-mips/mach-tx39xx/mangle-port.h, for example. */ 387 #ifdef NEEDS_TXX9_SWIZZLE_ADDR_B 388 static unsigned long __swizzle_addr_none(unsigned long port) 389 { 390 return port; 391 } 392 unsigned long (*__swizzle_addr_b)(unsigned long port) = __swizzle_addr_none; 393 EXPORT_SYMBOL(__swizzle_addr_b); 394 #endif 395