Commit 4ebef31f authored by Sean MacLennan's avatar Sean MacLennan Committed by Josh Boyer
Browse files

[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: default avatarSean MacLennan <smaclennan@pikatech.com>
Signed-off-by: default avatarJosh Boyer <jwboyer@linux.vnet.ibm.com>
parent 0393cb61

arch/powerpc/boot/cuboot-warp.c

+44 −3
Original line number Diff line number Diff line
@@ -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_fixups(void)

static void warp_fixup_one_nor(u32 from, u32 to)

{

	unsigned long sysclk = 66000000;

	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);

	}

}





	ibm440ep_fixup_clocks(sysclk, 11059200, 50000000);

static void warp_fixups(void)

{

	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);

	}

}

arch/powerpc/platforms/44x/warp-nand.c

+37 −12
Original line number Diff line number Diff line
@@ -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   = "persistent",

		.offset = 0x4000000,

		.size   = 0x4000000

	},

	{

		.name   = "user",

		.offset = 0x3600000,

		.size   = 0x0A00000

		.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);

arch/powerpc/platforms/44x/warp.c

+243 −50
Original line number Diff line number Diff line
@@ -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)

/* I am not sure this is the best place for this... */

static int __init warp_post_info(void)

{

	struct device_node *np;

	void __iomem *fpga;

	u32 post1, post2;



	/* Sighhhh... POST information is in the sd area. */

	np = of_find_compatible_node(NULL, NULL, "pika,fpga-sd");

	if (np == NULL)

		return -ENOENT;



	fpga = of_iomap(np, 0);

	of_node_put(np);

	if (fpga == NULL)

		return -ENOENT;



	post1 = in_be32(fpga + 0x40);

	post2 = in_be32(fpga + 0x44);



	iounmap(fpga);



	if (post1 || post2)

		printk(KERN_INFO "Warp POST %08x %08x\n", post1, post2);

	else

		printk(KERN_INFO "Warp POST OK\n");



	return 0;

}

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;

}



/* This is for the power LEDs 1 = on, 0 = off, -1 = leave alone */

void warp_set_power_leds(int green, int red)

static irqreturn_t temp_isr(int irq, void *context)

{

	static void __iomem *gpio_base = NULL;

	unsigned leds;

	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);



	if (gpio_base == NULL) {

	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;



		/* 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) {

	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;

		return -ENOENT;

	}



	gpio_base = of_iomap(np, 0);

	of_node_put(np);

		if (gpio_base == NULL) {

	if (!gpio_base) {

		printk(KERN_ERR __FILE__ ": Unable to map gpio");

			return;

		return -ENOMEM;

	}



	return 0;

}



	leds = in_be32(gpio_base);

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 */



	switch (green) {

	case 0: leds &= ~LED_GREEN; break;

	case 1: leds |=  LED_GREEN; break;

	np = of_find_compatible_node(NULL, NULL, "adi,ad7414");

	if (np == NULL) {

		printk(KERN_ERR __FILE__ ": Unable to find ad7414\n");

		return;

	}

	switch (red) {

	case 0: leds &= ~LED_RED; break;

	case 1: leds |=  LED_RED; break;



	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;

	}



	out_be32(gpio_base, leds);

	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;

	}

}

EXPORT_SYMBOL(warp_set_power_leds);



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");

	}

}



#ifdef CONFIG_SENSORS_AD7414

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);

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