diff options
Diffstat (limited to 'arch/mips/txx9/generic/setup.c')
| -rw-r--r-- | arch/mips/txx9/generic/setup.c | 246 |
1 files changed, 246 insertions, 0 deletions
diff --git a/arch/mips/txx9/generic/setup.c b/arch/mips/txx9/generic/setup.c new file mode 100644 index 00000000000..8c60c78b9a9 --- /dev/null +++ b/arch/mips/txx9/generic/setup.c @@ -0,0 +1,246 @@ +/* + * linux/arch/mips/txx9/generic/setup.c + * + * Based on linux/arch/mips/txx9/rbtx4938/setup.c, + * and RBTX49xx patch from CELF patch archive. + * + * 2003-2005 (c) MontaVista Software, Inc. + * (C) Copyright TOSHIBA CORPORATION 2000-2001, 2004-2007 + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/interrupt.h> +#include <linux/string.h> +#include <linux/module.h> +#include <linux/clk.h> +#include <linux/err.h> +#include <linux/gpio.h> +#include <asm/bootinfo.h> +#include <asm/time.h> +#include <asm/txx9/generic.h> +#ifdef CONFIG_CPU_TX49XX +#include <asm/txx9/tx4938.h> +#endif + +/* EBUSC settings of TX4927, etc. */ +struct resource txx9_ce_res[8]; +static char txx9_ce_res_name[8][4]; /* "CEn" */ + +/* pcode, internal register */ +unsigned int txx9_pcode; +char txx9_pcode_str[8]; +static struct resource txx9_reg_res = { + .name = txx9_pcode_str, + .flags = IORESOURCE_MEM, +}; +void __init +txx9_reg_res_init(unsigned int pcode, unsigned long base, unsigned long size) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(txx9_ce_res); i++) { + sprintf(txx9_ce_res_name[i], "CE%d", i); + txx9_ce_res[i].flags = IORESOURCE_MEM; + txx9_ce_res[i].name = txx9_ce_res_name[i]; + } + + sprintf(txx9_pcode_str, "TX%x", pcode); + if (base) { + txx9_reg_res.start = base & 0xfffffffffULL; + txx9_reg_res.end = (base & 0xfffffffffULL) + (size - 1); + request_resource(&iomem_resource, &txx9_reg_res); + } +} + +/* clocks */ +unsigned int txx9_master_clock; +unsigned int txx9_cpu_clock; +unsigned int txx9_gbus_clock; + +int txx9_ccfg_toeon __initdata = 1; + +/* Minimum CLK support */ + +struct clk *clk_get(struct device *dev, const char *id) +{ + if (!strcmp(id, "spi-baseclk")) + return (struct clk *)((unsigned long)txx9_gbus_clock / 2 / 4); + if (!strcmp(id, "imbus_clk")) + return (struct clk *)((unsigned long)txx9_gbus_clock / 2); + return ERR_PTR(-ENOENT); +} +EXPORT_SYMBOL(clk_get); + +int clk_enable(struct clk *clk) +{ + return 0; +} +EXPORT_SYMBOL(clk_enable); + +void clk_disable(struct clk *clk) +{ +} +EXPORT_SYMBOL(clk_disable); + +unsigned long clk_get_rate(struct clk *clk) +{ + return (unsigned long)clk; +} +EXPORT_SYMBOL(clk_get_rate); + +void clk_put(struct clk *clk) +{ +} +EXPORT_SYMBOL(clk_put); + +/* GPIO support */ + +#ifdef CONFIG_GENERIC_GPIO +int gpio_to_irq(unsigned gpio) +{ + return -EINVAL; +} +EXPORT_SYMBOL(gpio_to_irq); + +int irq_to_gpio(unsigned irq) +{ + return -EINVAL; +} +EXPORT_SYMBOL(irq_to_gpio); +#endif + +extern struct txx9_board_vec jmr3927_vec; +extern struct txx9_board_vec rbtx4927_vec; +extern struct txx9_board_vec rbtx4937_vec; +extern struct txx9_board_vec rbtx4938_vec; + +struct txx9_board_vec *txx9_board_vec __initdata; +static char txx9_system_type[32]; + +void __init prom_init_cmdline(void) +{ + int argc = (int)fw_arg0; + char **argv = (char **)fw_arg1; + int i; /* Always ignore the "-c" at argv[0] */ +#ifdef CONFIG_64BIT + char *fixed_argv[32]; + for (i = 0; i < argc; i++) + fixed_argv[i] = (char *)(long)(*((__s32 *)argv + i)); + argv = fixed_argv; +#endif + + /* ignore all built-in args if any f/w args given */ + if (argc > 1) + *arcs_cmdline = '\0'; + + for (i = 1; i < argc; i++) { + if (i != 1) + strcat(arcs_cmdline, " "); + strcat(arcs_cmdline, argv[i]); + } +} + +void __init prom_init(void) +{ +#ifdef CONFIG_CPU_TX39XX + txx9_board_vec = &jmr3927_vec; +#endif +#ifdef CONFIG_CPU_TX49XX + switch (TX4938_REV_PCODE()) { +#ifdef CONFIG_TOSHIBA_RBTX4927 + case 0x4927: + txx9_board_vec = &rbtx4927_vec; + break; + case 0x4937: + txx9_board_vec = &rbtx4937_vec; + break; +#endif +#ifdef CONFIG_TOSHIBA_RBTX4938 + case 0x4938: + txx9_board_vec = &rbtx4938_vec; + break; +#endif + } +#endif + + strcpy(txx9_system_type, txx9_board_vec->system); + + txx9_board_vec->prom_init(); +} + +void __init prom_free_prom_memory(void) +{ +} + +const char *get_system_type(void) +{ + return txx9_system_type; +} + +char * __init prom_getcmdline(void) +{ + return &(arcs_cmdline[0]); +} + +/* wrappers */ +void __init plat_mem_setup(void) +{ + ioport_resource.start = 0; + ioport_resource.end = ~0UL; /* no limit */ + iomem_resource.start = 0; + iomem_resource.end = ~0UL; /* no limit */ + txx9_board_vec->mem_setup(); +} + +void __init arch_init_irq(void) +{ + txx9_board_vec->irq_setup(); +} + +void __init plat_time_init(void) +{ + txx9_board_vec->time_init(); +} + +static int __init _txx9_arch_init(void) +{ + if (txx9_board_vec->arch_init) + txx9_board_vec->arch_init(); + return 0; +} +arch_initcall(_txx9_arch_init); + +static int __init _txx9_device_init(void) +{ + if (txx9_board_vec->device_init) + txx9_board_vec->device_init(); + return 0; +} +device_initcall(_txx9_device_init); + +int (*txx9_irq_dispatch)(int pending); +asmlinkage void plat_irq_dispatch(void) +{ + int pending = read_c0_status() & read_c0_cause() & ST0_IM; + int irq = txx9_irq_dispatch(pending); + + if (likely(irq >= 0)) + do_IRQ(irq); + else + spurious_interrupt(); +} + +/* see include/asm-mips/mach-tx39xx/mangle-port.h, for example. */ +#ifdef NEEDS_TXX9_SWIZZLE_ADDR_B +static unsigned long __swizzle_addr_none(unsigned long port) +{ + return port; +} +unsigned long (*__swizzle_addr_b)(unsigned long port) = __swizzle_addr_none; +EXPORT_SYMBOL(__swizzle_addr_b); +#endif |