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