diff options
Diffstat (limited to 'arch/powerpc/platforms/44x')
| -rw-r--r-- | arch/powerpc/platforms/44x/warp-nand.c | 49 | ||||
| -rw-r--r-- | arch/powerpc/platforms/44x/warp.c | 293 |
2 files changed, 280 insertions, 62 deletions
diff --git a/arch/powerpc/platforms/44x/warp-nand.c b/arch/powerpc/platforms/44x/warp-nand.c index 9150318cfc5..d293c702e73 100644 --- a/arch/powerpc/platforms/44x/warp-nand.c +++ b/arch/powerpc/platforms/44x/warp-nand.c @@ -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); diff --git a/arch/powerpc/platforms/44x/warp.c b/arch/powerpc/platforms/44x/warp.c index 39cf6150a72..9565995cba7 100644 --- a/arch/powerpc/platforms/44x/warp.c +++ b/arch/powerpc/platforms/44x/warp.c @@ -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; +}; -/* This is for the power LEDs 1 = on, 0 = off, -1 = leave alone */ -void warp_set_power_leds(int green, int red) +int pika_dtm_register_shutdown(void (*func)(void *arg), void *arg) { - static void __iomem *gpio_base = NULL; - unsigned leds; - - if (gpio_base == NULL) { - struct device_node *np; - - /* 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; + 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); } - gpio_base = of_iomap(np, 0); - of_node_put(np); - if (gpio_base == NULL) { - printk(KERN_ERR __FILE__ ": Unable to map gpio"); - return; + 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; } - leds = in_be32(gpio_base); + 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; + } - switch (green) { - case 0: leds &= ~LED_GREEN; break; - case 1: leds |= LED_GREEN; break; + np = of_find_node_by_phandle(gpios[0]); + if (!np) { + printk(KERN_ERR __FILE__ ": Unable to find gpio\n"); + return -ENOENT; } - switch (red) { - case 0: leds &= ~LED_RED; break; - case 1: leds |= LED_RED; break; + + gpio_base = of_iomap(np, 0); + of_node_put(np); + if (!gpio_base) { + printk(KERN_ERR __FILE__ ": Unable to map gpio"); + return -ENOMEM; } - out_be32(gpio_base, leds); + return 0; } -EXPORT_SYMBOL(warp_set_power_leds); +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"); + } +} -#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); |