[POWERPC] PIKA Warp: Update platform code to support Rev B boards

* Switched from 64M NOR/64M NAND to 4M NOR/256M NAND.
* Full DTM support including critical temperature.
* Added POST information.
* Removed LED function, moved to new LED driver.
* Moved ad7414 to new style I2C initialization.

Signed-off-by: Sean MacLennan <smaclennan@pikatech.com>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
This commit is contained in:
Sean MacLennan 2008-05-20 08:28:52 -05:00 committed by Josh Boyer
parent 0393cb615f
commit 4ebef31fa6
3 changed files with 328 additions and 69 deletions

View file

@ -10,6 +10,7 @@
#include "ops.h"
#include "4xx.h"
#include "cuboot.h"
#include "stdio.h"
#define TARGET_4xx
#define TARGET_44x
@ -17,14 +18,54 @@
static bd_t bd;
static void warp_fixup_one_nor(u32 from, u32 to)
{
void *devp;
char name[50];
u32 v[2];
sprintf(name, "/plb/opb/ebc/nor_flash@0,0/partition@%x", from);
devp = finddevice(name);
if (!devp)
return;
if (getprop(devp, "reg", v, sizeof(v)) == sizeof(v)) {
v[0] = to;
setprop(devp, "reg", v, sizeof(v));
printf("NOR 64M fixup %x -> %x\r\n", from, to);
}
}
static void warp_fixups(void)
{
unsigned long sysclk = 66000000;
ibm440ep_fixup_clocks(sysclk, 11059200, 50000000);
ibm440ep_fixup_clocks(66000000, 11059200, 50000000);
ibm4xx_sdram_fixup_memsize();
ibm4xx_fixup_ebc_ranges("/plb/opb/ebc");
dt_fixup_mac_address_by_alias("ethernet0", bd.bi_enetaddr);
/* Fixup for 64M flash on Rev A boards. */
if (bd.bi_flashsize == 0x4000000) {
void *devp;
u32 v[3];
devp = finddevice("/plb/opb/ebc/nor_flash@0,0");
if (!devp)
return;
/* Fixup the size */
if (getprop(devp, "reg", v, sizeof(v)) == sizeof(v)) {
v[2] = bd.bi_flashsize;
setprop(devp, "reg", v, sizeof(v));
}
/* Fixup parition offsets */
warp_fixup_one_nor(0x300000, 0x3f00000);
warp_fixup_one_nor(0x340000, 0x3f40000);
warp_fixup_one_nor(0x380000, 0x3f80000);
}
}

View file

@ -11,8 +11,10 @@
#include <linux/mtd/partitions.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/ndfc.h>
#include <linux/of.h>
#include <asm/machdep.h>
#ifdef CONFIG_MTD_NAND_NDFC
#define CS_NAND_0 1 /* use chip select 1 for NAND device 0 */
@ -35,13 +37,23 @@ static struct mtd_partition nand_parts[] = {
{
.name = "root",
.offset = 0x0200000,
.size = 0x3400000
.size = 0x3E00000
},
{
.name = "user",
.offset = 0x3600000,
.size = 0x0A00000
.name = "persistent",
.offset = 0x4000000,
.size = 0x4000000
},
{
.name = "persistent1",
.offset = 0x8000000,
.size = 0x4000000
},
{
.name = "persistent2",
.offset = 0xC000000,
.size = 0x4000000
}
};
struct ndfc_controller_settings warp_ndfc_settings = {
@ -67,19 +79,15 @@ static struct platform_device warp_ndfc_device = {
.resource = &warp_ndfc,
};
static struct nand_ecclayout nand_oob_16 = {
.eccbytes = 3,
.eccpos = { 0, 1, 2, 3, 6, 7 },
.oobfree = { {.offset = 8, .length = 16} }
};
/* Do NOT set the ecclayout: let it default so it is correct for both
* 64M and 256M flash chips.
*/
static struct platform_nand_chip warp_nand_chip0 = {
.nr_chips = 1,
.chip_offset = CS_NAND_0,
.nr_partitions = ARRAY_SIZE(nand_parts),
.partitions = nand_parts,
.chip_delay = 50,
.ecclayout = &nand_oob_16,
.chip_delay = 20,
.priv = &warp_chip0_settings,
};
@ -96,6 +104,23 @@ static struct platform_device warp_nand_device = {
static int warp_setup_nand_flash(void)
{
struct device_node *np;
/* Try to detect a rev A based on NOR size. */
np = of_find_compatible_node(NULL, NULL, "cfi-flash");
if (np) {
struct property *pp;
pp = of_find_property(np, "reg", NULL);
if (pp && (pp->length == 12)) {
u32 *v = pp->value;
if (v[2] == 0x4000000)
/* Rev A = 64M NAND */
warp_nand_chip0.nr_partitions = 2;
}
of_node_put(np);
}
platform_device_register(&warp_ndfc_device);
platform_device_register(&warp_nand_device);

View file

@ -12,6 +12,9 @@
#include <linux/init.h>
#include <linux/of_platform.h>
#include <linux/kthread.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <asm/machdep.h>
#include <asm/prom.h>
@ -27,6 +30,18 @@ static __initdata struct of_device_id warp_of_bus[] = {
{},
};
static __initdata struct i2c_board_info warp_i2c_info[] = {
{ I2C_BOARD_INFO("ad7414", 0x4a) }
};
static int __init warp_arch_init(void)
{
/* This should go away once support is moved to the dts. */
i2c_register_board_info(0, warp_i2c_info, ARRAY_SIZE(warp_i2c_info));
return 0;
}
machine_arch_initcall(warp, warp_arch_init);
static int __init warp_device_probe(void)
{
of_platform_bus_probe(NULL, warp_of_bus, NULL);
@ -52,61 +67,232 @@ define_machine(warp) {
};
#define LED_GREEN (0x80000000 >> 0)
#define LED_RED (0x80000000 >> 1)
/* This is for the power LEDs 1 = on, 0 = off, -1 = leave alone */
void warp_set_power_leds(int green, int red)
/* I am not sure this is the best place for this... */
static int __init warp_post_info(void)
{
static void __iomem *gpio_base = NULL;
unsigned leds;
struct device_node *np;
void __iomem *fpga;
u32 post1, post2;
if (gpio_base == NULL) {
struct device_node *np;
/* Sighhhh... POST information is in the sd area. */
np = of_find_compatible_node(NULL, NULL, "pika,fpga-sd");
if (np == NULL)
return -ENOENT;
/* Power LEDS are on the second GPIO controller */
np = of_find_compatible_node(NULL, NULL, "ibm,gpio-440EP");
if (np)
np = of_find_compatible_node(np, NULL, "ibm,gpio-440EP");
if (np == NULL) {
printk(KERN_ERR __FILE__ ": Unable to find gpio\n");
return;
}
fpga = of_iomap(np, 0);
of_node_put(np);
if (fpga == NULL)
return -ENOENT;
gpio_base = of_iomap(np, 0);
of_node_put(np);
if (gpio_base == NULL) {
printk(KERN_ERR __FILE__ ": Unable to map gpio");
return;
}
}
post1 = in_be32(fpga + 0x40);
post2 = in_be32(fpga + 0x44);
leds = in_be32(gpio_base);
iounmap(fpga);
switch (green) {
case 0: leds &= ~LED_GREEN; break;
case 1: leds |= LED_GREEN; break;
}
switch (red) {
case 0: leds &= ~LED_RED; break;
case 1: leds |= LED_RED; break;
}
if (post1 || post2)
printk(KERN_INFO "Warp POST %08x %08x\n", post1, post2);
else
printk(KERN_INFO "Warp POST OK\n");
out_be32(gpio_base, leds);
return 0;
}
EXPORT_SYMBOL(warp_set_power_leds);
machine_late_initcall(warp, warp_post_info);
#ifdef CONFIG_SENSORS_AD7414
static LIST_HEAD(dtm_shutdown_list);
static void __iomem *dtm_fpga;
static void __iomem *gpio_base;
struct dtm_shutdown {
struct list_head list;
void (*func)(void *arg);
void *arg;
};
int pika_dtm_register_shutdown(void (*func)(void *arg), void *arg)
{
struct dtm_shutdown *shutdown;
shutdown = kmalloc(sizeof(struct dtm_shutdown), GFP_KERNEL);
if (shutdown == NULL)
return -ENOMEM;
shutdown->func = func;
shutdown->arg = arg;
list_add(&shutdown->list, &dtm_shutdown_list);
return 0;
}
int pika_dtm_unregister_shutdown(void (*func)(void *arg), void *arg)
{
struct dtm_shutdown *shutdown;
list_for_each_entry(shutdown, &dtm_shutdown_list, list)
if (shutdown->func == func && shutdown->arg == arg) {
list_del(&shutdown->list);
kfree(shutdown);
return 0;
}
return -EINVAL;
}
static irqreturn_t temp_isr(int irq, void *context)
{
struct dtm_shutdown *shutdown;
local_irq_disable();
/* Run through the shutdown list. */
list_for_each_entry(shutdown, &dtm_shutdown_list, list)
shutdown->func(shutdown->arg);
printk(KERN_EMERG "\n\nCritical Temperature Shutdown\n");
while (1) {
if (dtm_fpga) {
unsigned reset = in_be32(dtm_fpga + 0x14);
out_be32(dtm_fpga + 0x14, reset);
}
if (gpio_base) {
unsigned leds = in_be32(gpio_base);
/* green off, red toggle */
leds &= ~0x80000000;
leds ^= 0x40000000;
out_be32(gpio_base, leds);
}
mdelay(500);
}
}
static int pika_setup_leds(void)
{
struct device_node *np;
const u32 *gpios;
int len;
np = of_find_compatible_node(NULL, NULL, "linux,gpio-led");
if (!np) {
printk(KERN_ERR __FILE__ ": Unable to find gpio-led\n");
return -ENOENT;
}
gpios = of_get_property(np, "gpios", &len);
of_node_put(np);
if (!gpios || len < 4) {
printk(KERN_ERR __FILE__
": Unable to get gpios property (%d)\n", len);
return -ENOENT;
}
np = of_find_node_by_phandle(gpios[0]);
if (!np) {
printk(KERN_ERR __FILE__ ": Unable to find gpio\n");
return -ENOENT;
}
gpio_base = of_iomap(np, 0);
of_node_put(np);
if (!gpio_base) {
printk(KERN_ERR __FILE__ ": Unable to map gpio");
return -ENOMEM;
}
return 0;
}
static void pika_setup_critical_temp(struct i2c_client *client)
{
struct device_node *np;
int irq, rc;
/* Do this before enabling critical temp interrupt since we
* may immediately interrupt.
*/
pika_setup_leds();
/* These registers are in 1 degree increments. */
i2c_smbus_write_byte_data(client, 2, 65); /* Thigh */
i2c_smbus_write_byte_data(client, 3, 55); /* Tlow */
np = of_find_compatible_node(NULL, NULL, "adi,ad7414");
if (np == NULL) {
printk(KERN_ERR __FILE__ ": Unable to find ad7414\n");
return;
}
irq = irq_of_parse_and_map(np, 0);
of_node_put(np);
if (irq == NO_IRQ) {
printk(KERN_ERR __FILE__ ": Unable to get ad7414 irq\n");
return;
}
rc = request_irq(irq, temp_isr, 0, "ad7414", NULL);
if (rc) {
printk(KERN_ERR __FILE__
": Unable to request ad7414 irq %d = %d\n", irq, rc);
return;
}
}
static inline void pika_dtm_check_fan(void __iomem *fpga)
{
static int fan_state;
u32 fan = in_be32(fpga + 0x34) & (1 << 14);
if (fan_state != fan) {
fan_state = fan;
if (fan)
printk(KERN_WARNING "Fan rotation error detected."
" Please check hardware.\n");
}
}
static int pika_dtm_thread(void __iomem *fpga)
{
extern int ad7414_get_temp(int index);
struct i2c_adapter *adap;
struct i2c_client *client;
/* We loop in case either driver was compiled as a module and
* has not been insmoded yet.
*/
while (!(adap = i2c_get_adapter(0))) {
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(HZ);
}
while (1) {
list_for_each_entry(client, &adap->clients, list)
if (client->addr == 0x4a)
goto found_it;
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(HZ);
}
found_it:
i2c_put_adapter(adap);
pika_setup_critical_temp(client);
printk(KERN_INFO "PIKA DTM thread running.\n");
while (!kthread_should_stop()) {
int temp = ad7414_get_temp(0);
u16 temp = swab16(i2c_smbus_read_word_data(client, 0));
out_be32(fpga + 0x20, temp);
out_be32(fpga, temp);
pika_dtm_check_fan(fpga);
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(HZ);
@ -115,37 +301,44 @@ static int pika_dtm_thread(void __iomem *fpga)
return 0;
}
static int __init pika_dtm_start(void)
{
struct task_struct *dtm_thread;
struct device_node *np;
struct resource res;
void __iomem *fpga;
np = of_find_compatible_node(NULL, NULL, "pika,fpga");
if (np == NULL)
return -ENOENT;
/* We do not call of_iomap here since it would map in the entire
* fpga space, which is over 8k.
*/
if (of_address_to_resource(np, 0, &res)) {
of_node_put(np);
return -ENOENT;
}
dtm_fpga = of_iomap(np, 0);
of_node_put(np);
fpga = ioremap(res.start, 0x24);
if (fpga == NULL)
if (dtm_fpga == NULL)
return -ENOENT;
dtm_thread = kthread_run(pika_dtm_thread, fpga + 0x20, "pika-dtm");
dtm_thread = kthread_run(pika_dtm_thread, dtm_fpga, "pika-dtm");
if (IS_ERR(dtm_thread)) {
iounmap(fpga);
iounmap(dtm_fpga);
return PTR_ERR(dtm_thread);
}
return 0;
}
device_initcall(pika_dtm_start);
machine_late_initcall(warp, pika_dtm_start);
#else /* !CONFIG_SENSORS_AD7414 */
int pika_dtm_register_shutdown(void (*func)(void *arg), void *arg)
{
return 0;
}
int pika_dtm_unregister_shutdown(void (*func)(void *arg), void *arg)
{
return 0;
}
#endif
EXPORT_SYMBOL(pika_dtm_register_shutdown);
EXPORT_SYMBOL(pika_dtm_unregister_shutdown);