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linux-sg2042/arch/mips/txx9/generic/setup.c

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/*
* 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 <linux/platform_device.h>
#include <linux/serial_core.h>
#include <linux/mtd/physmap.h>
#include <linux/leds.h>
#include <asm/bootinfo.h>
#include <asm/time.h>
#include <asm/reboot.h>
#include <asm/r4kcache.h>
#include <asm/sections.h>
#include <asm/txx9/generic.h>
#include <asm/txx9/pci.h>
#include <asm/txx9tmr.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];
}
txx9_pcode = pcode;
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;
#ifdef CONFIG_CPU_TX39XX
/* don't enable by default - see errata */
int txx9_ccfg_toeon __initdata;
#else
int txx9_ccfg_toeon __initdata = 1;
#endif
/* 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
#define BOARD_VEC(board) extern struct txx9_board_vec board;
#include <asm/txx9/boards.h>
#undef BOARD_VEC
struct txx9_board_vec *txx9_board_vec __initdata;
static char txx9_system_type[32];
static struct txx9_board_vec *board_vecs[] __initdata = {
#define BOARD_VEC(board) &board,
#include <asm/txx9/boards.h>
#undef BOARD_VEC
};
static struct txx9_board_vec *__init find_board_byname(const char *name)
{
int i;
/* search board_vecs table */
for (i = 0; i < ARRAY_SIZE(board_vecs); i++) {
if (strstr(board_vecs[i]->system, name))
return board_vecs[i];
}
return NULL;
}
static void __init prom_init_cmdline(void)
{
int argc = (int)fw_arg0;
int *argv32 = (int *)fw_arg1;
int i; /* Always ignore the "-c" at argv[0] */
char builtin[CL_SIZE];
/* ignore all built-in args if any f/w args given */
/*
* But if built-in strings was started with '+', append them
* to command line args. If built-in was started with '-',
* ignore all f/w args.
*/
builtin[0] = '\0';
if (arcs_cmdline[0] == '+')
strcpy(builtin, arcs_cmdline + 1);
else if (arcs_cmdline[0] == '-') {
strcpy(builtin, arcs_cmdline + 1);
argc = 0;
} else if (argc <= 1)
strcpy(builtin, arcs_cmdline);
arcs_cmdline[0] = '\0';
for (i = 1; i < argc; i++) {
char *str = (char *)(long)argv32[i];
if (i != 1)
strcat(arcs_cmdline, " ");
if (strchr(str, ' ')) {
strcat(arcs_cmdline, "\"");
strcat(arcs_cmdline, str);
strcat(arcs_cmdline, "\"");
} else
strcat(arcs_cmdline, str);
}
/* append saved builtin args */
if (builtin[0]) {
if (arcs_cmdline[0])
strcat(arcs_cmdline, " ");
strcat(arcs_cmdline, builtin);
}
}
static int txx9_ic_disable __initdata;
static int txx9_dc_disable __initdata;
#if defined(CONFIG_CPU_TX49XX)
/* flush all cache on very early stage (before 4k_cache_init) */
static void __init early_flush_dcache(void)
{
unsigned int conf = read_c0_config();
unsigned int dc_size = 1 << (12 + ((conf & CONF_DC) >> 6));
unsigned int linesz = 32;
unsigned long addr, end;
end = INDEX_BASE + dc_size / 4;
/* 4way, waybit=0 */
for (addr = INDEX_BASE; addr < end; addr += linesz) {
cache_op(Index_Writeback_Inv_D, addr | 0);
cache_op(Index_Writeback_Inv_D, addr | 1);
cache_op(Index_Writeback_Inv_D, addr | 2);
cache_op(Index_Writeback_Inv_D, addr | 3);
}
}
static void __init txx9_cache_fixup(void)
{
unsigned int conf;
conf = read_c0_config();
/* flush and disable */
if (txx9_ic_disable) {
conf |= TX49_CONF_IC;
write_c0_config(conf);
}
if (txx9_dc_disable) {
early_flush_dcache();
conf |= TX49_CONF_DC;
write_c0_config(conf);
}
/* enable cache */
conf = read_c0_config();
if (!txx9_ic_disable)
conf &= ~TX49_CONF_IC;
if (!txx9_dc_disable)
conf &= ~TX49_CONF_DC;
write_c0_config(conf);
if (conf & TX49_CONF_IC)
pr_info("TX49XX I-Cache disabled.\n");
if (conf & TX49_CONF_DC)
pr_info("TX49XX D-Cache disabled.\n");
}
#elif defined(CONFIG_CPU_TX39XX)
/* flush all cache on very early stage (before tx39_cache_init) */
static void __init early_flush_dcache(void)
{
unsigned int conf = read_c0_config();
unsigned int dc_size = 1 << (10 + ((conf & TX39_CONF_DCS_MASK) >>
TX39_CONF_DCS_SHIFT));
unsigned int linesz = 16;
unsigned long addr, end;
end = INDEX_BASE + dc_size / 2;
/* 2way, waybit=0 */
for (addr = INDEX_BASE; addr < end; addr += linesz) {
cache_op(Index_Writeback_Inv_D, addr | 0);
cache_op(Index_Writeback_Inv_D, addr | 1);
}
}
static void __init txx9_cache_fixup(void)
{
unsigned int conf;
conf = read_c0_config();
/* flush and disable */
if (txx9_ic_disable) {
conf &= ~TX39_CONF_ICE;
write_c0_config(conf);
}
if (txx9_dc_disable) {
early_flush_dcache();
conf &= ~TX39_CONF_DCE;
write_c0_config(conf);
}
/* enable cache */
conf = read_c0_config();
if (!txx9_ic_disable)
conf |= TX39_CONF_ICE;
if (!txx9_dc_disable)
conf |= TX39_CONF_DCE;
write_c0_config(conf);
if (!(conf & TX39_CONF_ICE))
pr_info("TX39XX I-Cache disabled.\n");
if (!(conf & TX39_CONF_DCE))
pr_info("TX39XX D-Cache disabled.\n");
}
#else
static inline void txx9_cache_fixup(void)
{
}
#endif
static void __init preprocess_cmdline(void)
{
char cmdline[CL_SIZE];
char *s;
strcpy(cmdline, arcs_cmdline);
s = cmdline;
arcs_cmdline[0] = '\0';
while (s && *s) {
char *str = strsep(&s, " ");
if (strncmp(str, "board=", 6) == 0) {
txx9_board_vec = find_board_byname(str + 6);
continue;
} else if (strncmp(str, "masterclk=", 10) == 0) {
unsigned long val;
if (strict_strtoul(str + 10, 10, &val) == 0)
txx9_master_clock = val;
continue;
} else if (strcmp(str, "icdisable") == 0) {
txx9_ic_disable = 1;
continue;
} else if (strcmp(str, "dcdisable") == 0) {
txx9_dc_disable = 1;
continue;
} else if (strcmp(str, "toeoff") == 0) {
txx9_ccfg_toeon = 0;
continue;
} else if (strcmp(str, "toeon") == 0) {
txx9_ccfg_toeon = 1;
continue;
}
if (arcs_cmdline[0])
strcat(arcs_cmdline, " ");
strcat(arcs_cmdline, str);
}
txx9_cache_fixup();
}
static void __init select_board(void)
{
const char *envstr;
/* first, determine by "board=" argument in preprocess_cmdline() */
if (txx9_board_vec)
return;
/* next, determine by "board" envvar */
envstr = prom_getenv("board");
if (envstr) {
txx9_board_vec = find_board_byname(envstr);
if (txx9_board_vec)
return;
}
/* select "default" board */
#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
#ifdef CONFIG_TOSHIBA_RBTX4939
case 0x4939:
txx9_board_vec = &rbtx4939_vec;
break;
#endif
}
#endif
}
void __init prom_init(void)
{
prom_init_cmdline();
preprocess_cmdline();
select_board();
strcpy(txx9_system_type, txx9_board_vec->system);
txx9_board_vec->prom_init();
}
void __init prom_free_prom_memory(void)
{
unsigned long saddr = PAGE_SIZE;
unsigned long eaddr = __pa_symbol(&_text);
if (saddr < eaddr)
free_init_pages("prom memory", saddr, eaddr);
}
const char *get_system_type(void)
{
return txx9_system_type;
}
char * __init prom_getcmdline(void)
{
return &(arcs_cmdline[0]);
}
const char *__init prom_getenv(const char *name)
{
const s32 *str = (const s32 *)fw_arg2;
if (!str)
return NULL;
/* YAMON style ("name", "value" pairs) */
while (str[0] && str[1]) {
if (!strcmp((const char *)(unsigned long)str[0], name))
return (const char *)(unsigned long)str[1];
str += 2;
}
return NULL;
}
static void __noreturn txx9_machine_halt(void)
{
local_irq_disable();
clear_c0_status(ST0_IM);
while (1) {
if (cpu_wait) {
(*cpu_wait)();
if (cpu_has_counter) {
/*
* Clear counter interrupt while it
* breaks WAIT instruction even if
* masked.
*/
write_c0_compare(0);
}
}
}
}
/* Watchdog support */
void __init txx9_wdt_init(unsigned long base)
{
struct resource res = {
.start = base,
.end = base + 0x100 - 1,
.flags = IORESOURCE_MEM,
};
platform_device_register_simple("txx9wdt", -1, &res, 1);
}
void txx9_wdt_now(unsigned long base)
{
struct txx9_tmr_reg __iomem *tmrptr =
ioremap(base, sizeof(struct txx9_tmr_reg));
/* disable watch dog timer */
__raw_writel(TXx9_TMWTMR_WDIS | TXx9_TMWTMR_TWC, &tmrptr->wtmr);
__raw_writel(0, &tmrptr->tcr);
/* kick watchdog */
__raw_writel(TXx9_TMWTMR_TWIE, &tmrptr->wtmr);
__raw_writel(1, &tmrptr->cpra); /* immediate */
__raw_writel(TXx9_TMTCR_TCE | TXx9_TMTCR_CCDE | TXx9_TMTCR_TMODE_WDOG,
&tmrptr->tcr);
}
/* SPI support */
void __init txx9_spi_init(int busid, unsigned long base, int irq)
{
struct resource res[] = {
{
.start = base,
.end = base + 0x20 - 1,
.flags = IORESOURCE_MEM,
}, {
.start = irq,
.flags = IORESOURCE_IRQ,
},
};
platform_device_register_simple("spi_txx9", busid,
res, ARRAY_SIZE(res));
}
void __init txx9_ethaddr_init(unsigned int id, unsigned char *ethaddr)
{
struct platform_device *pdev =
platform_device_alloc("tc35815-mac", id);
if (!pdev ||
platform_device_add_data(pdev, ethaddr, 6) ||
platform_device_add(pdev))
platform_device_put(pdev);
}
void __init txx9_sio_init(unsigned long baseaddr, int irq,
unsigned int line, unsigned int sclk, int nocts)
{
#ifdef CONFIG_SERIAL_TXX9
struct uart_port req;
memset(&req, 0, sizeof(req));
req.line = line;
req.iotype = UPIO_MEM;
req.membase = ioremap(baseaddr, 0x24);
req.mapbase = baseaddr;
req.irq = irq;
if (!nocts)
req.flags |= UPF_BUGGY_UART /*HAVE_CTS_LINE*/;
if (sclk) {
req.flags |= UPF_MAGIC_MULTIPLIER /*USE_SCLK*/;
req.uartclk = sclk;
} else
req.uartclk = TXX9_IMCLK;
early_serial_txx9_setup(&req);
#endif /* CONFIG_SERIAL_TXX9 */
}
#ifdef CONFIG_EARLY_PRINTK
static void __init null_prom_putchar(char c)
{
}
void (*txx9_prom_putchar)(char c) __initdata = null_prom_putchar;
void __init prom_putchar(char c)
{
txx9_prom_putchar(c);
}
static void __iomem *early_txx9_sio_port;
static void __init early_txx9_sio_putchar(char c)
{
#define TXX9_SICISR 0x0c
#define TXX9_SITFIFO 0x1c
#define TXX9_SICISR_TXALS 0x00000002
while (!(__raw_readl(early_txx9_sio_port + TXX9_SICISR) &
TXX9_SICISR_TXALS))
;
__raw_writel(c, early_txx9_sio_port + TXX9_SITFIFO);
}
void __init txx9_sio_putchar_init(unsigned long baseaddr)
{
early_txx9_sio_port = ioremap(baseaddr, 0x24);
txx9_prom_putchar = early_txx9_sio_putchar;
}
#endif /* CONFIG_EARLY_PRINTK */
/* 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 */
/* fallback restart/halt routines */
_machine_restart = (void (*)(char *))txx9_machine_halt;
_machine_halt = txx9_machine_halt;
pm_power_off = txx9_machine_halt;
#ifdef CONFIG_PCI
pcibios_plat_setup = txx9_pcibios_setup;
#endif
txx9_board_vec->mem_setup();
}
void __init arch_init_irq(void)
{
txx9_board_vec->irq_setup();
}
void __init plat_time_init(void)
{
#ifdef CONFIG_CPU_TX49XX
mips_hpt_frequency = txx9_cpu_clock / 2;
#endif
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
void __init txx9_physmap_flash_init(int no, unsigned long addr,
unsigned long size,
const struct physmap_flash_data *pdata)
{
#if defined(CONFIG_MTD_PHYSMAP) || defined(CONFIG_MTD_PHYSMAP_MODULE)
struct resource res = {
.start = addr,
.end = addr + size - 1,
.flags = IORESOURCE_MEM,
};
struct platform_device *pdev;
#ifdef CONFIG_MTD_PARTITIONS
static struct mtd_partition parts[2];
struct physmap_flash_data pdata_part;
/* If this area contained boot area, make separate partition */
if (pdata->nr_parts == 0 && !pdata->parts &&
addr < 0x1fc00000 && addr + size > 0x1fc00000 &&
!parts[0].name) {
parts[0].name = "boot";
parts[0].offset = 0x1fc00000 - addr;
parts[0].size = addr + size - 0x1fc00000;
parts[1].name = "user";
parts[1].offset = 0;
parts[1].size = 0x1fc00000 - addr;
pdata_part = *pdata;
pdata_part.nr_parts = ARRAY_SIZE(parts);
pdata_part.parts = parts;
pdata = &pdata_part;
}
#endif
pdev = platform_device_alloc("physmap-flash", no);
if (!pdev ||
platform_device_add_resources(pdev, &res, 1) ||
platform_device_add_data(pdev, pdata, sizeof(*pdata)) ||
platform_device_add(pdev))
platform_device_put(pdev);
#endif
}
#if defined(CONFIG_LEDS_GPIO) || defined(CONFIG_LEDS_GPIO_MODULE)
static DEFINE_SPINLOCK(txx9_iocled_lock);
#define TXX9_IOCLED_MAXLEDS 8
struct txx9_iocled_data {
struct gpio_chip chip;
u8 cur_val;
void __iomem *mmioaddr;
struct gpio_led_platform_data pdata;
struct gpio_led leds[TXX9_IOCLED_MAXLEDS];
char names[TXX9_IOCLED_MAXLEDS][32];
};
static int txx9_iocled_get(struct gpio_chip *chip, unsigned int offset)
{
struct txx9_iocled_data *data =
container_of(chip, struct txx9_iocled_data, chip);
return data->cur_val & (1 << offset);
}
static void txx9_iocled_set(struct gpio_chip *chip, unsigned int offset,
int value)
{
struct txx9_iocled_data *data =
container_of(chip, struct txx9_iocled_data, chip);
unsigned long flags;
spin_lock_irqsave(&txx9_iocled_lock, flags);
if (value)
data->cur_val |= 1 << offset;
else
data->cur_val &= ~(1 << offset);
writeb(data->cur_val, data->mmioaddr);
mmiowb();
spin_unlock_irqrestore(&txx9_iocled_lock, flags);
}
static int txx9_iocled_dir_in(struct gpio_chip *chip, unsigned int offset)
{
return 0;
}
static int txx9_iocled_dir_out(struct gpio_chip *chip, unsigned int offset,
int value)
{
txx9_iocled_set(chip, offset, value);
return 0;
}
void __init txx9_iocled_init(unsigned long baseaddr,
int basenum, unsigned int num, int lowactive,
const char *color, char **deftriggers)
{
struct txx9_iocled_data *iocled;
struct platform_device *pdev;
int i;
static char *default_triggers[] __initdata = {
"heartbeat",
"ide-disk",
"nand-disk",
NULL,
};
if (!deftriggers)
deftriggers = default_triggers;
iocled = kzalloc(sizeof(*iocled), GFP_KERNEL);
if (!iocled)
return;
iocled->mmioaddr = ioremap(baseaddr, 1);
if (!iocled->mmioaddr)
return;
iocled->chip.get = txx9_iocled_get;
iocled->chip.set = txx9_iocled_set;
iocled->chip.direction_input = txx9_iocled_dir_in;
iocled->chip.direction_output = txx9_iocled_dir_out;
iocled->chip.label = "iocled";
iocled->chip.base = basenum;
iocled->chip.ngpio = num;
if (gpiochip_add(&iocled->chip))
return;
if (basenum < 0)
basenum = iocled->chip.base;
pdev = platform_device_alloc("leds-gpio", basenum);
if (!pdev)
return;
iocled->pdata.num_leds = num;
iocled->pdata.leds = iocled->leds;
for (i = 0; i < num; i++) {
struct gpio_led *led = &iocled->leds[i];
snprintf(iocled->names[i], sizeof(iocled->names[i]),
"iocled:%s:%u", color, i);
led->name = iocled->names[i];
led->gpio = basenum + i;
led->active_low = lowactive;
if (deftriggers && *deftriggers)
led->default_trigger = *deftriggers++;
}
pdev->dev.platform_data = &iocled->pdata;
if (platform_device_add(pdev))
platform_device_put(pdev);
}
#else /* CONFIG_LEDS_GPIO */
void __init txx9_iocled_init(unsigned long baseaddr,
int basenum, unsigned int num, int lowactive,
const char *color, char **deftriggers)
{
}
#endif /* CONFIG_LEDS_GPIO */
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