diff options
Diffstat (limited to 'arch/ppc/syslib/ppc83xx_setup.c')
| -rw-r--r-- | arch/ppc/syslib/ppc83xx_setup.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/arch/ppc/syslib/ppc83xx_setup.c b/arch/ppc/syslib/ppc83xx_setup.c new file mode 100644 index 000000000000..c28f9d679484 --- /dev/null +++ b/arch/ppc/syslib/ppc83xx_setup.c @@ -0,0 +1,138 @@ +/* + * arch/ppc/syslib/ppc83xx_setup.c + * + * MPC83XX common board code + * + * Maintainer: Kumar Gala <kumar.gala@freescale.com> + * + * Copyright 2005 Freescale Semiconductor Inc. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include <linux/config.h> +#include <linux/types.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/pci.h> +#include <linux/serial.h> +#include <linux/tty.h> /* for linux/serial_core.h */ +#include <linux/serial_core.h> +#include <linux/serial_8250.h> + +#include <asm/prom.h> +#include <asm/time.h> +#include <asm/mpc83xx.h> +#include <asm/mmu.h> +#include <asm/ppc_sys.h> +#include <asm/kgdb.h> + +#include <syslib/ppc83xx_setup.h> + +phys_addr_t immrbar; + +/* Return the amount of memory */ +unsigned long __init +mpc83xx_find_end_of_memory(void) +{ + bd_t *binfo; + + binfo = (bd_t *) __res; + + return binfo->bi_memsize; +} + +long __init +mpc83xx_time_init(void) +{ +#define SPCR_OFFS 0x00000110 +#define SPCR_TBEN 0x00400000 + + bd_t *binfo = (bd_t *)__res; + u32 *spcr = ioremap(binfo->bi_immr_base + SPCR_OFFS, 4); + + *spcr |= SPCR_TBEN; + + iounmap(spcr); + + return 0; +} + +/* The decrementer counts at the system (internal) clock freq divided by 4 */ +void __init +mpc83xx_calibrate_decr(void) +{ + bd_t *binfo = (bd_t *) __res; + unsigned int freq, divisor; + + freq = binfo->bi_busfreq; + divisor = 4; + tb_ticks_per_jiffy = freq / HZ / divisor; + tb_to_us = mulhwu_scale_factor(freq / divisor, 1000000); +} + +#ifdef CONFIG_SERIAL_8250 +void __init +mpc83xx_early_serial_map(void) +{ +#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB) + struct uart_port serial_req; +#endif + struct plat_serial8250_port *pdata; + bd_t *binfo = (bd_t *) __res; + pdata = (struct plat_serial8250_port *) ppc_sys_get_pdata(MPC83xx_DUART); + + /* Setup serial port access */ + pdata[0].uartclk = binfo->bi_busfreq; + pdata[0].mapbase += binfo->bi_immr_base; + pdata[0].membase = ioremap(pdata[0].mapbase, 0x100); + +#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB) + memset(&serial_req, 0, sizeof (serial_req)); + serial_req.iotype = SERIAL_IO_MEM; + serial_req.mapbase = pdata[0].mapbase; + serial_req.membase = pdata[0].membase; + serial_req.regshift = 0; + + gen550_init(0, &serial_req); +#endif + + pdata[1].uartclk = binfo->bi_busfreq; + pdata[1].mapbase += binfo->bi_immr_base; + pdata[1].membase = ioremap(pdata[1].mapbase, 0x100); + +#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB) + /* Assume gen550_init() doesn't modify serial_req */ + serial_req.mapbase = pdata[1].mapbase; + serial_req.membase = pdata[1].membase; + + gen550_init(1, &serial_req); +#endif +} +#endif + +void +mpc83xx_restart(char *cmd) +{ + local_irq_disable(); + for(;;); +} + +void +mpc83xx_power_off(void) +{ + local_irq_disable(); + for(;;); +} + +void +mpc83xx_halt(void) +{ + local_irq_disable(); + for(;;); +} + +/* PCI SUPPORT DOES NOT EXIT, MODEL after ppc85xx_setup.c */ |