diff options
Diffstat (limited to 'kernel/drivers/macintosh/via-pmu.c')
| -rw-r--r-- | kernel/drivers/macintosh/via-pmu.c | 2597 |
1 files changed, 2597 insertions, 0 deletions
diff --git a/kernel/drivers/macintosh/via-pmu.c b/kernel/drivers/macintosh/via-pmu.c new file mode 100644 index 000000000..f9512bfa6 --- /dev/null +++ b/kernel/drivers/macintosh/via-pmu.c @@ -0,0 +1,2597 @@ +/* + * Device driver for the via-pmu on Apple Powermacs. + * + * The VIA (versatile interface adapter) interfaces to the PMU, + * a 6805 microprocessor core whose primary function is to control + * battery charging and system power on the PowerBook 3400 and 2400. + * The PMU also controls the ADB (Apple Desktop Bus) which connects + * to the keyboard and mouse, as well as the non-volatile RAM + * and the RTC (real time clock) chip. + * + * Copyright (C) 1998 Paul Mackerras and Fabio Riccardi. + * Copyright (C) 2001-2002 Benjamin Herrenschmidt + * Copyright (C) 2006-2007 Johannes Berg + * + * THIS DRIVER IS BECOMING A TOTAL MESS ! + * - Cleanup atomically disabling reply to PMU events after + * a sleep or a freq. switch + * + */ +#include <stdarg.h> +#include <linux/mutex.h> +#include <linux/types.h> +#include <linux/errno.h> +#include <linux/kernel.h> +#include <linux/delay.h> +#include <linux/sched.h> +#include <linux/miscdevice.h> +#include <linux/blkdev.h> +#include <linux/pci.h> +#include <linux/slab.h> +#include <linux/poll.h> +#include <linux/adb.h> +#include <linux/pmu.h> +#include <linux/cuda.h> +#include <linux/module.h> +#include <linux/spinlock.h> +#include <linux/pm.h> +#include <linux/proc_fs.h> +#include <linux/seq_file.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/device.h> +#include <linux/syscore_ops.h> +#include <linux/freezer.h> +#include <linux/syscalls.h> +#include <linux/suspend.h> +#include <linux/cpu.h> +#include <linux/compat.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> +#include <asm/prom.h> +#include <asm/machdep.h> +#include <asm/io.h> +#include <asm/pgtable.h> +#include <asm/sections.h> +#include <asm/irq.h> +#include <asm/pmac_feature.h> +#include <asm/pmac_pfunc.h> +#include <asm/pmac_low_i2c.h> +#include <asm/uaccess.h> +#include <asm/mmu_context.h> +#include <asm/cputable.h> +#include <asm/time.h> +#include <asm/backlight.h> + +#include "via-pmu-event.h" + +/* Some compile options */ +#undef DEBUG_SLEEP + +/* Misc minor number allocated for /dev/pmu */ +#define PMU_MINOR 154 + +/* How many iterations between battery polls */ +#define BATTERY_POLLING_COUNT 2 + +static DEFINE_MUTEX(pmu_info_proc_mutex); +static volatile unsigned char __iomem *via; + +/* VIA registers - spaced 0x200 bytes apart */ +#define RS 0x200 /* skip between registers */ +#define B 0 /* B-side data */ +#define A RS /* A-side data */ +#define DIRB (2*RS) /* B-side direction (1=output) */ +#define DIRA (3*RS) /* A-side direction (1=output) */ +#define T1CL (4*RS) /* Timer 1 ctr/latch (low 8 bits) */ +#define T1CH (5*RS) /* Timer 1 counter (high 8 bits) */ +#define T1LL (6*RS) /* Timer 1 latch (low 8 bits) */ +#define T1LH (7*RS) /* Timer 1 latch (high 8 bits) */ +#define T2CL (8*RS) /* Timer 2 ctr/latch (low 8 bits) */ +#define T2CH (9*RS) /* Timer 2 counter (high 8 bits) */ +#define SR (10*RS) /* Shift register */ +#define ACR (11*RS) /* Auxiliary control register */ +#define PCR (12*RS) /* Peripheral control register */ +#define IFR (13*RS) /* Interrupt flag register */ +#define IER (14*RS) /* Interrupt enable register */ +#define ANH (15*RS) /* A-side data, no handshake */ + +/* Bits in B data register: both active low */ +#define TACK 0x08 /* Transfer acknowledge (input) */ +#define TREQ 0x10 /* Transfer request (output) */ + +/* Bits in ACR */ +#define SR_CTRL 0x1c /* Shift register control bits */ +#define SR_EXT 0x0c /* Shift on external clock */ +#define SR_OUT 0x10 /* Shift out if 1 */ + +/* Bits in IFR and IER */ +#define IER_SET 0x80 /* set bits in IER */ +#define IER_CLR 0 /* clear bits in IER */ +#define SR_INT 0x04 /* Shift register full/empty */ +#define CB2_INT 0x08 +#define CB1_INT 0x10 /* transition on CB1 input */ + +static volatile enum pmu_state { + idle, + sending, + intack, + reading, + reading_intr, + locked, +} pmu_state; + +static volatile enum int_data_state { + int_data_empty, + int_data_fill, + int_data_ready, + int_data_flush +} int_data_state[2] = { int_data_empty, int_data_empty }; + +static struct adb_request *current_req; +static struct adb_request *last_req; +static struct adb_request *req_awaiting_reply; +static unsigned char interrupt_data[2][32]; +static int interrupt_data_len[2]; +static int int_data_last; +static unsigned char *reply_ptr; +static int data_index; +static int data_len; +static volatile int adb_int_pending; +static volatile int disable_poll; +static struct device_node *vias; +static int pmu_kind = PMU_UNKNOWN; +static int pmu_fully_inited; +static int pmu_has_adb; +static struct device_node *gpio_node; +static unsigned char __iomem *gpio_reg; +static int gpio_irq = NO_IRQ; +static int gpio_irq_enabled = -1; +static volatile int pmu_suspended; +static spinlock_t pmu_lock; +static u8 pmu_intr_mask; +static int pmu_version; +static int drop_interrupts; +#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) +static int option_lid_wakeup = 1; +#endif /* CONFIG_SUSPEND && CONFIG_PPC32 */ +static unsigned long async_req_locks; +static unsigned int pmu_irq_stats[11]; + +static struct proc_dir_entry *proc_pmu_root; +static struct proc_dir_entry *proc_pmu_info; +static struct proc_dir_entry *proc_pmu_irqstats; +static struct proc_dir_entry *proc_pmu_options; +static int option_server_mode; + +int pmu_battery_count; +int pmu_cur_battery; +unsigned int pmu_power_flags = PMU_PWR_AC_PRESENT; +struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES]; +static int query_batt_timer = BATTERY_POLLING_COUNT; +static struct adb_request batt_req; +static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES]; + +int __fake_sleep; +int asleep; + +#ifdef CONFIG_ADB +static int adb_dev_map; +static int pmu_adb_flags; + +static int pmu_probe(void); +static int pmu_init(void); +static int pmu_send_request(struct adb_request *req, int sync); +static int pmu_adb_autopoll(int devs); +static int pmu_adb_reset_bus(void); +#endif /* CONFIG_ADB */ + +static int init_pmu(void); +static void pmu_start(void); +static irqreturn_t via_pmu_interrupt(int irq, void *arg); +static irqreturn_t gpio1_interrupt(int irq, void *arg); +static const struct file_operations pmu_info_proc_fops; +static const struct file_operations pmu_irqstats_proc_fops; +static void pmu_pass_intr(unsigned char *data, int len); +static const struct file_operations pmu_battery_proc_fops; +static const struct file_operations pmu_options_proc_fops; + +#ifdef CONFIG_ADB +struct adb_driver via_pmu_driver = { + "PMU", + pmu_probe, + pmu_init, + pmu_send_request, + pmu_adb_autopoll, + pmu_poll_adb, + pmu_adb_reset_bus +}; +#endif /* CONFIG_ADB */ + +extern void low_sleep_handler(void); +extern void enable_kernel_altivec(void); +extern void enable_kernel_fp(void); + +#ifdef DEBUG_SLEEP +int pmu_polled_request(struct adb_request *req); +void pmu_blink(int n); +#endif + +/* + * This table indicates for each PMU opcode: + * - the number of data bytes to be sent with the command, or -1 + * if a length byte should be sent, + * - the number of response bytes which the PMU will return, or + * -1 if it will send a length byte. + */ +static const s8 pmu_data_len[256][2] = { +/* 0 1 2 3 4 5 6 7 */ +/*00*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, +/*08*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, +/*10*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, +/*18*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0}, +/*20*/ {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0}, +/*28*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1}, +/*30*/ { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, +/*38*/ { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0}, +/*40*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, +/*48*/ { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1}, +/*50*/ { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0}, +/*58*/ { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1}, +/*60*/ { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, +/*68*/ { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1}, +/*70*/ { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, +/*78*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1}, +/*80*/ { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, +/*88*/ { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, +/*90*/ { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, +/*98*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, +/*a0*/ { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0}, +/*a8*/ { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, +/*b0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, +/*b8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, +/*c0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, +/*c8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, +/*d0*/ { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, +/*d8*/ { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1}, +/*e0*/ {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0}, +/*e8*/ { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0}, +/*f0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0}, +/*f8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1}, +}; + +static char *pbook_type[] = { + "Unknown PowerBook", + "PowerBook 2400/3400/3500(G3)", + "PowerBook G3 Series", + "1999 PowerBook G3", + "Core99" +}; + +int __init find_via_pmu(void) +{ + u64 taddr; + const u32 *reg; + + if (via != 0) + return 1; + vias = of_find_node_by_name(NULL, "via-pmu"); + if (vias == NULL) + return 0; + + reg = of_get_property(vias, "reg", NULL); + if (reg == NULL) { + printk(KERN_ERR "via-pmu: No \"reg\" property !\n"); + goto fail; + } + taddr = of_translate_address(vias, reg); + if (taddr == OF_BAD_ADDR) { + printk(KERN_ERR "via-pmu: Can't translate address !\n"); + goto fail; + } + + spin_lock_init(&pmu_lock); + + pmu_has_adb = 1; + + pmu_intr_mask = PMU_INT_PCEJECT | + PMU_INT_SNDBRT | + PMU_INT_ADB | + PMU_INT_TICK; + + if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0) + || of_device_is_compatible(vias->parent, "ohare"))) + pmu_kind = PMU_OHARE_BASED; + else if (of_device_is_compatible(vias->parent, "paddington")) + pmu_kind = PMU_PADDINGTON_BASED; + else if (of_device_is_compatible(vias->parent, "heathrow")) + pmu_kind = PMU_HEATHROW_BASED; + else if (of_device_is_compatible(vias->parent, "Keylargo") + || of_device_is_compatible(vias->parent, "K2-Keylargo")) { + struct device_node *gpiop; + struct device_node *adbp; + u64 gaddr = OF_BAD_ADDR; + + pmu_kind = PMU_KEYLARGO_BASED; + adbp = of_find_node_by_type(NULL, "adb"); + pmu_has_adb = (adbp != NULL); + of_node_put(adbp); + pmu_intr_mask = PMU_INT_PCEJECT | + PMU_INT_SNDBRT | + PMU_INT_ADB | + PMU_INT_TICK | + PMU_INT_ENVIRONMENT; + + gpiop = of_find_node_by_name(NULL, "gpio"); + if (gpiop) { + reg = of_get_property(gpiop, "reg", NULL); + if (reg) + gaddr = of_translate_address(gpiop, reg); + if (gaddr != OF_BAD_ADDR) + gpio_reg = ioremap(gaddr, 0x10); + of_node_put(gpiop); + } + if (gpio_reg == NULL) { + printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n"); + goto fail; + } + } else + pmu_kind = PMU_UNKNOWN; + + via = ioremap(taddr, 0x2000); + if (via == NULL) { + printk(KERN_ERR "via-pmu: Can't map address !\n"); + goto fail_via_remap; + } + + out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */ + out_8(&via[IFR], 0x7f); /* clear IFR */ + + pmu_state = idle; + + if (!init_pmu()) + goto fail_init; + + printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n", + PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version); + + sys_ctrler = SYS_CTRLER_PMU; + + return 1; + + fail_init: + iounmap(via); + via = NULL; + fail_via_remap: + iounmap(gpio_reg); + gpio_reg = NULL; + fail: + of_node_put(vias); + vias = NULL; + return 0; +} + +#ifdef CONFIG_ADB +static int pmu_probe(void) +{ + return vias == NULL? -ENODEV: 0; +} + +static int __init pmu_init(void) +{ + if (vias == NULL) + return -ENODEV; + return 0; +} +#endif /* CONFIG_ADB */ + +/* + * We can't wait until pmu_init gets called, that happens too late. + * It happens after IDE and SCSI initialization, which can take a few + * seconds, and by that time the PMU could have given up on us and + * turned us off. + * Thus this is called with arch_initcall rather than device_initcall. + */ +static int __init via_pmu_start(void) +{ + unsigned int irq; + + if (vias == NULL) + return -ENODEV; + + batt_req.complete = 1; + + irq = irq_of_parse_and_map(vias, 0); + if (irq == NO_IRQ) { + printk(KERN_ERR "via-pmu: can't map interrupt\n"); + return -ENODEV; + } + /* We set IRQF_NO_SUSPEND because we don't want the interrupt + * to be disabled between the 2 passes of driver suspend, we + * control our own disabling for that one + */ + if (request_irq(irq, via_pmu_interrupt, IRQF_NO_SUSPEND, + "VIA-PMU", (void *)0)) { + printk(KERN_ERR "via-pmu: can't request irq %d\n", irq); + return -ENODEV; + } + + if (pmu_kind == PMU_KEYLARGO_BASED) { + gpio_node = of_find_node_by_name(NULL, "extint-gpio1"); + if (gpio_node == NULL) + gpio_node = of_find_node_by_name(NULL, + "pmu-interrupt"); + if (gpio_node) + gpio_irq = irq_of_parse_and_map(gpio_node, 0); + + if (gpio_irq != NO_IRQ) { + if (request_irq(gpio_irq, gpio1_interrupt, IRQF_TIMER, + "GPIO1 ADB", (void *)0)) + printk(KERN_ERR "pmu: can't get irq %d" + " (GPIO1)\n", gpio_irq); + else + gpio_irq_enabled = 1; + } + } + + /* Enable interrupts */ + out_8(&via[IER], IER_SET | SR_INT | CB1_INT); + + pmu_fully_inited = 1; + + /* Make sure PMU settle down before continuing. This is _very_ important + * since the IDE probe may shut interrupts down for quite a bit of time. If + * a PMU communication is pending while this happens, the PMU may timeout + * Not that on Core99 machines, the PMU keeps sending us environement + * messages, we should find a way to either fix IDE or make it call + * pmu_suspend() before masking interrupts. This can also happens while + * scolling with some fbdevs. + */ + do { + pmu_poll(); + } while (pmu_state != idle); + + return 0; +} + +arch_initcall(via_pmu_start); + +/* + * This has to be done after pci_init, which is a subsys_initcall. + */ +static int __init via_pmu_dev_init(void) +{ + if (vias == NULL) + return -ENODEV; + +#ifdef CONFIG_PMAC_BACKLIGHT + /* Initialize backlight */ + pmu_backlight_init(); +#endif + +#ifdef CONFIG_PPC32 + if (of_machine_is_compatible("AAPL,3400/2400") || + of_machine_is_compatible("AAPL,3500")) { + int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO, + NULL, PMAC_MB_INFO_MODEL, 0); + pmu_battery_count = 1; + if (mb == PMAC_TYPE_COMET) + pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET; + else + pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER; + } else if (of_machine_is_compatible("AAPL,PowerBook1998") || + of_machine_is_compatible("PowerBook1,1")) { + pmu_battery_count = 2; + pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART; + pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART; + } else { + struct device_node* prim = + of_find_node_by_name(NULL, "power-mgt"); + const u32 *prim_info = NULL; + if (prim) + prim_info = of_get_property(prim, "prim-info", NULL); + if (prim_info) { + /* Other stuffs here yet unknown */ + pmu_battery_count = (prim_info[6] >> 16) & 0xff; + pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART; + if (pmu_battery_count > 1) + pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART; + } + of_node_put(prim); + } +#endif /* CONFIG_PPC32 */ + + /* Create /proc/pmu */ + proc_pmu_root = proc_mkdir("pmu", NULL); + if (proc_pmu_root) { + long i; + + for (i=0; i<pmu_battery_count; i++) { + char title[16]; + sprintf(title, "battery_%ld", i); + proc_pmu_batt[i] = proc_create_data(title, 0, proc_pmu_root, + &pmu_battery_proc_fops, (void *)i); + } + + proc_pmu_info = proc_create("info", 0, proc_pmu_root, &pmu_info_proc_fops); + proc_pmu_irqstats = proc_create("interrupts", 0, proc_pmu_root, + &pmu_irqstats_proc_fops); + proc_pmu_options = proc_create("options", 0600, proc_pmu_root, + &pmu_options_proc_fops); + } + return 0; +} + +device_initcall(via_pmu_dev_init); + +static int +init_pmu(void) +{ + int timeout; + struct adb_request req; + + out_8(&via[B], via[B] | TREQ); /* negate TREQ */ + out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK); /* TACK in, TREQ out */ + + pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); + timeout = 100000; + while (!req.complete) { + if (--timeout < 0) { + printk(KERN_ERR "init_pmu: no response from PMU\n"); + return 0; + } + udelay(10); + pmu_poll(); + } + + /* ack all pending interrupts */ + timeout = 100000; + interrupt_data[0][0] = 1; + while (interrupt_data[0][0] || pmu_state != idle) { + if (--timeout < 0) { + printk(KERN_ERR "init_pmu: timed out acking intrs\n"); + return 0; + } + if (pmu_state == idle) + adb_int_pending = 1; + via_pmu_interrupt(0, NULL); + udelay(10); + } + + /* Tell PMU we are ready. */ + if (pmu_kind == PMU_KEYLARGO_BASED) { + pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); + while (!req.complete) + pmu_poll(); + } + + /* Read PMU version */ + pmu_request(&req, NULL, 1, PMU_GET_VERSION); + pmu_wait_complete(&req); + if (req.reply_len > 0) + pmu_version = req.reply[0]; + + /* Read server mode setting */ + if (pmu_kind == PMU_KEYLARGO_BASED) { + pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, + PMU_PWR_GET_POWERUP_EVENTS); + pmu_wait_complete(&req); + if (req.reply_len == 2) { + if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT) + option_server_mode = 1; + printk(KERN_INFO "via-pmu: Server Mode is %s\n", + option_server_mode ? "enabled" : "disabled"); + } + } + return 1; +} + +int +pmu_get_model(void) +{ + return pmu_kind; +} + +static void pmu_set_server_mode(int server_mode) +{ + struct adb_request req; + + if (pmu_kind != PMU_KEYLARGO_BASED) + return; + + option_server_mode = server_mode; + pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS); + pmu_wait_complete(&req); + if (req.reply_len < 2) + return; + if (server_mode) + pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, + PMU_PWR_SET_POWERUP_EVENTS, + req.reply[0], PMU_PWR_WAKEUP_AC_INSERT); + else + pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, + PMU_PWR_CLR_POWERUP_EVENTS, + req.reply[0], PMU_PWR_WAKEUP_AC_INSERT); + pmu_wait_complete(&req); +} + +/* This new version of the code for 2400/3400/3500 powerbooks + * is inspired from the implementation in gkrellm-pmu + */ +static void +done_battery_state_ohare(struct adb_request* req) +{ + /* format: + * [0] : flags + * 0x01 : AC indicator + * 0x02 : charging + * 0x04 : battery exist + * 0x08 : + * 0x10 : + * 0x20 : full charged + * 0x40 : pcharge reset + * 0x80 : battery exist + * + * [1][2] : battery voltage + * [3] : CPU temperature + * [4] : battery temperature + * [5] : current + * [6][7] : pcharge + * --tkoba + */ + unsigned int bat_flags = PMU_BATT_TYPE_HOOPER; + long pcharge, charge, vb, vmax, lmax; + long vmax_charging, vmax_charged; + long amperage, voltage, time, max; + int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO, + NULL, PMAC_MB_INFO_MODEL, 0); + + if (req->reply[0] & 0x01) + pmu_power_flags |= PMU_PWR_AC_PRESENT; + else + pmu_power_flags &= ~PMU_PWR_AC_PRESENT; + + if (mb == PMAC_TYPE_COMET) { + vmax_charged = 189; + vmax_charging = 213; + lmax = 6500; + } else { + vmax_charged = 330; + vmax_charging = 330; + lmax = 6500; + } + vmax = vmax_charged; + + /* If battery installed */ + if (req->reply[0] & 0x04) { + bat_flags |= PMU_BATT_PRESENT; + if (req->reply[0] & 0x02) + bat_flags |= PMU_BATT_CHARGING; + vb = (req->reply[1] << 8) | req->reply[2]; + voltage = (vb * 265 + 72665) / 10; + amperage = req->reply[5]; + if ((req->reply[0] & 0x01) == 0) { + if (amperage > 200) + vb += ((amperage - 200) * 15)/100; + } else if (req->reply[0] & 0x02) { + vb = (vb * 97) / 100; + vmax = vmax_charging; + } + charge = (100 * vb) / vmax; + if (req->reply[0] & 0x40) { + pcharge = (req->reply[6] << 8) + req->reply[7]; + if (pcharge > lmax) + pcharge = lmax; + pcharge *= 100; + pcharge = 100 - pcharge / lmax; + if (pcharge < charge) + charge = pcharge; + } + if (amperage > 0) + time = (charge * 16440) / amperage; + else + time = 0; + max = 100; + amperage = -amperage; + } else + charge = max = amperage = voltage = time = 0; + + pmu_batteries[pmu_cur_battery].flags = bat_flags; + pmu_batteries[pmu_cur_battery].charge = charge; + pmu_batteries[pmu_cur_battery].max_charge = max; + pmu_batteries[pmu_cur_battery].amperage = amperage; + pmu_batteries[pmu_cur_battery].voltage = voltage; + pmu_batteries[pmu_cur_battery].time_remaining = time; + + clear_bit(0, &async_req_locks); +} + +static void +done_battery_state_smart(struct adb_request* req) +{ + /* format: + * [0] : format of this structure (known: 3,4,5) + * [1] : flags + * + * format 3 & 4: + * + * [2] : charge + * [3] : max charge + * [4] : current + * [5] : voltage + * + * format 5: + * + * [2][3] : charge + * [4][5] : max charge + * [6][7] : current + * [8][9] : voltage + */ + + unsigned int bat_flags = PMU_BATT_TYPE_SMART; + int amperage; + unsigned int capa, max, voltage; + + if (req->reply[1] & 0x01) + pmu_power_flags |= PMU_PWR_AC_PRESENT; + else + pmu_power_flags &= ~PMU_PWR_AC_PRESENT; + + + capa = max = amperage = voltage = 0; + + if (req->reply[1] & 0x04) { + bat_flags |= PMU_BATT_PRESENT; + switch(req->reply[0]) { + case 3: + case 4: capa = req->reply[2]; + max = req->reply[3]; + amperage = *((signed char *)&req->reply[4]); + voltage = req->reply[5]; + break; + case 5: capa = (req->reply[2] << 8) | req->reply[3]; + max = (req->reply[4] << 8) | req->reply[5]; + amperage = *((signed short *)&req->reply[6]); + voltage = (req->reply[8] << 8) | req->reply[9]; + break; + default: + pr_warn("pmu.c: unrecognized battery info, " + "len: %d, %4ph\n", req->reply_len, + req->reply); + break; + } + } + + if ((req->reply[1] & 0x01) && (amperage > 0)) + bat_flags |= PMU_BATT_CHARGING; + + pmu_batteries[pmu_cur_battery].flags = bat_flags; + pmu_batteries[pmu_cur_battery].charge = capa; + pmu_batteries[pmu_cur_battery].max_charge = max; + pmu_batteries[pmu_cur_battery].amperage = amperage; + pmu_batteries[pmu_cur_battery].voltage = voltage; + if (amperage) { + if ((req->reply[1] & 0x01) && (amperage > 0)) + pmu_batteries[pmu_cur_battery].time_remaining + = ((max-capa) * 3600) / amperage; + else + pmu_batteries[pmu_cur_battery].time_remaining + = (capa * 3600) / (-amperage); + } else + pmu_batteries[pmu_cur_battery].time_remaining = 0; + + pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count; + + clear_bit(0, &async_req_locks); +} + +static void +query_battery_state(void) +{ + if (test_and_set_bit(0, &async_req_locks)) + return; + if (pmu_kind == PMU_OHARE_BASED) + pmu_request(&batt_req, done_battery_state_ohare, + 1, PMU_BATTERY_STATE); + else + pmu_request(&batt_req, done_battery_state_smart, + 2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1); +} + +static int pmu_info_proc_show(struct seq_file *m, void *v) +{ + seq_printf(m, "PMU driver version : %d\n", PMU_DRIVER_VERSION); + seq_printf(m, "PMU firmware version : %02x\n", pmu_version); + seq_printf(m, "AC Power : %d\n", + ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0); + seq_printf(m, "Battery count : %d\n", pmu_battery_count); + + return 0; +} + +static int pmu_info_proc_open(struct inode *inode, struct file *file) +{ + return single_open(file, pmu_info_proc_show, NULL); +} + +static const struct file_operations pmu_info_proc_fops = { + .owner = THIS_MODULE, + .open = pmu_info_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static int pmu_irqstats_proc_show(struct seq_file *m, void *v) +{ + int i; + static const char *irq_names[] = { + "Total CB1 triggered events", + "Total GPIO1 triggered events", + "PC-Card eject button", + "Sound/Brightness button", + "ADB message", + "Battery state change", + "Environment interrupt", + "Tick timer", + "Ghost interrupt (zero len)", + "Empty interrupt (empty mask)", + "Max irqs in a row" + }; + + for (i=0; i<11; i++) { + seq_printf(m, " %2u: %10u (%s)\n", + i, pmu_irq_stats[i], irq_names[i]); + } + return 0; +} + +static int pmu_irqstats_proc_open(struct inode *inode, struct file *file) +{ + return single_open(file, pmu_irqstats_proc_show, NULL); +} + +static const struct file_operations pmu_irqstats_proc_fops = { + .owner = THIS_MODULE, + .open = pmu_irqstats_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static int pmu_battery_proc_show(struct seq_file *m, void *v) +{ + long batnum = (long)m->private; + + seq_putc(m, '\n'); + seq_printf(m, "flags : %08x\n", pmu_batteries[batnum].flags); + seq_printf(m, "charge : %d\n", pmu_batteries[batnum].charge); + seq_printf(m, "max_charge : %d\n", pmu_batteries[batnum].max_charge); + seq_printf(m, "current : %d\n", pmu_batteries[batnum].amperage); + seq_printf(m, "voltage : %d\n", pmu_batteries[batnum].voltage); + seq_printf(m, "time rem. : %d\n", pmu_batteries[batnum].time_remaining); + return 0; +} + +static int pmu_battery_proc_open(struct inode *inode, struct file *file) +{ + return single_open(file, pmu_battery_proc_show, PDE_DATA(inode)); +} + +static const struct file_operations pmu_battery_proc_fops = { + .owner = THIS_MODULE, + .open = pmu_battery_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static int pmu_options_proc_show(struct seq_file *m, void *v) +{ +#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) + if (pmu_kind == PMU_KEYLARGO_BASED && + pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0) + seq_printf(m, "lid_wakeup=%d\n", option_lid_wakeup); +#endif + if (pmu_kind == PMU_KEYLARGO_BASED) + seq_printf(m, "server_mode=%d\n", option_server_mode); + + return 0; +} + +static int pmu_options_proc_open(struct inode *inode, struct file *file) +{ + return single_open(file, pmu_options_proc_show, NULL); +} + +static ssize_t pmu_options_proc_write(struct file *file, + const char __user *buffer, size_t count, loff_t *pos) +{ + char tmp[33]; + char *label, *val; + size_t fcount = count; + + if (!count) + return -EINVAL; + if (count > 32) + count = 32; + if (copy_from_user(tmp, buffer, count)) + return -EFAULT; + tmp[count] = 0; + + label = tmp; + while(*label == ' ') + label++; + val = label; + while(*val && (*val != '=')) { + if (*val == ' ') + *val = 0; + val++; + } + if ((*val) == 0) + return -EINVAL; + *(val++) = 0; + while(*val == ' ') + val++; +#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) + if (pmu_kind == PMU_KEYLARGO_BASED && + pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0) + if (!strcmp(label, "lid_wakeup")) + option_lid_wakeup = ((*val) == '1'); +#endif + if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) { + int new_value; + new_value = ((*val) == '1'); + if (new_value != option_server_mode) + pmu_set_server_mode(new_value); + } + return fcount; +} + +static const struct file_operations pmu_options_proc_fops = { + .owner = THIS_MODULE, + .open = pmu_options_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, + .write = pmu_options_proc_write, +}; + +#ifdef CONFIG_ADB +/* Send an ADB command */ +static int pmu_send_request(struct adb_request *req, int sync) +{ + int i, ret; + + if ((vias == NULL) || (!pmu_fully_inited)) { + req->complete = 1; + return -ENXIO; + } + + ret = -EINVAL; + + switch (req->data[0]) { + case PMU_PACKET: + for (i = 0; i < req->nbytes - 1; ++i) + req->data[i] = req->data[i+1]; + --req->nbytes; + if (pmu_data_len[req->data[0]][1] != 0) { + req->reply[0] = ADB_RET_OK; + req->reply_len = 1; + } else + req->reply_len = 0; + ret = pmu_queue_request(req); + break; + case CUDA_PACKET: + switch (req->data[1]) { + case CUDA_GET_TIME: + if (req->nbytes != 2) + break; + req->data[0] = PMU_READ_RTC; + req->nbytes = 1; + req->reply_len = 3; + req->reply[0] = CUDA_PACKET; + req->reply[1] = 0; + req->reply[2] = CUDA_GET_TIME; + ret = pmu_queue_request(req); + break; + case CUDA_SET_TIME: + if (req->nbytes != 6) + break; + req->data[0] = PMU_SET_RTC; + req->nbytes = 5; + for (i = 1; i <= 4; ++i) + req->data[i] = req->data[i+1]; + req->reply_len = 3; + req->reply[0] = CUDA_PACKET; + req->reply[1] = 0; + req->reply[2] = CUDA_SET_TIME; + ret = pmu_queue_request(req); + break; + } + break; + case ADB_PACKET: + if (!pmu_has_adb) + return -ENXIO; + for (i = req->nbytes - 1; i > 1; --i) + req->data[i+2] = req->data[i]; + req->data[3] = req->nbytes - 2; + req->data[2] = pmu_adb_flags; + /*req->data[1] = req->data[1];*/ + req->data[0] = PMU_ADB_CMD; + req->nbytes += 2; + req->reply_expected = 1; + req->reply_len = 0; + ret = pmu_queue_request(req); + break; + } + if (ret) { + req->complete = 1; + return ret; + } + + if (sync) + while (!req->complete) + pmu_poll(); + + return 0; +} + +/* Enable/disable autopolling */ +static int __pmu_adb_autopoll(int devs) +{ + struct adb_request req; + + if (devs) { + pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86, + adb_dev_map >> 8, adb_dev_map); + pmu_adb_flags = 2; + } else { + pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF); + pmu_adb_flags = 0; + } + while (!req.complete) + pmu_poll(); + return 0; +} + +static int pmu_adb_autopoll(int devs) +{ + if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb) + return -ENXIO; + + adb_dev_map = devs; + return __pmu_adb_autopoll(devs); +} + +/* Reset the ADB bus */ +static int pmu_adb_reset_bus(void) +{ + struct adb_request req; + int save_autopoll = adb_dev_map; + + if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb) + return -ENXIO; + + /* anyone got a better idea?? */ + __pmu_adb_autopoll(0); + + req.nbytes = 4; + req.done = NULL; + req.data[0] = PMU_ADB_CMD; + req.data[1] = ADB_BUSRESET; + req.data[2] = 0; + req.data[3] = 0; + req.data[4] = 0; + req.reply_len = 0; + req.reply_expected = 1; + if (pmu_queue_request(&req) != 0) { + printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n"); + return -EIO; + } + pmu_wait_complete(&req); + + if (save_autopoll != 0) + __pmu_adb_autopoll(save_autopoll); + + return 0; +} +#endif /* CONFIG_ADB */ + +/* Construct and send a pmu request */ +int +pmu_request(struct adb_request *req, void (*done)(struct adb_request *), + int nbytes, ...) +{ + va_list list; + int i; + + if (vias == NULL) + return -ENXIO; + + if (nbytes < 0 || nbytes > 32) { + printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes); + req->complete = 1; + return -EINVAL; + } + req->nbytes = nbytes; + req->done = done; + va_start(list, nbytes); + for (i = 0; i < nbytes; ++i) + req->data[i] = va_arg(list, int); + va_end(list); + req->reply_len = 0; + req->reply_expected = 0; + return pmu_queue_request(req); +} + +int +pmu_queue_request(struct adb_request *req) +{ + unsigned long flags; + int nsend; + + if (via == NULL) { + req->complete = 1; + return -ENXIO; + } + if (req->nbytes <= 0) { + req->complete = 1; + return 0; + } + nsend = pmu_data_len[req->data[0]][0]; + if (nsend >= 0 && req->nbytes != nsend + 1) { + req->complete = 1; + return -EINVAL; + } + + req->next = NULL; + req->sent = 0; + req->complete = 0; + + spin_lock_irqsave(&pmu_lock, flags); + if (current_req != 0) { + last_req->next = req; + last_req = req; + } else { + current_req = req; + last_req = req; + if (pmu_state == idle) + pmu_start(); + } + spin_unlock_irqrestore(&pmu_lock, flags); + + return 0; +} + +static inline void +wait_for_ack(void) +{ + /* Sightly increased the delay, I had one occurrence of the message + * reported + */ + int timeout = 4000; + while ((in_8(&via[B]) & TACK) == 0) { + if (--timeout < 0) { + printk(KERN_ERR "PMU not responding (!ack)\n"); + return; + } + udelay(10); + } +} + +/* New PMU seems to be very sensitive to those timings, so we make sure + * PCI is flushed immediately */ +static inline void +send_byte(int x) +{ + volatile unsigned char __iomem *v = via; + + out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT); + out_8(&v[SR], x); + out_8(&v[B], in_8(&v[B]) & ~TREQ); /* assert TREQ */ + (void)in_8(&v[B]); +} + +static inline void +recv_byte(void) +{ + volatile unsigned char __iomem *v = via; + + out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT); + in_8(&v[SR]); /* resets SR */ + out_8(&v[B], in_8(&v[B]) & ~TREQ); + (void)in_8(&v[B]); +} + +static inline void +pmu_done(struct adb_request *req) +{ + void (*done)(struct adb_request *) = req->done; + mb(); + req->complete = 1; + /* Here, we assume that if the request has a done member, the + * struct request will survive to setting req->complete to 1 + */ + if (done) + (*done)(req); +} + +static void +pmu_start(void) +{ + struct adb_request *req; + + /* assert pmu_state == idle */ + /* get the packet to send */ + req = current_req; + if (req == 0 || pmu_state != idle + || (/*req->reply_expected && */req_awaiting_reply)) + return; + + pmu_state = sending; + data_index = 1; + data_len = pmu_data_len[req->data[0]][0]; + + /* Sounds safer to make sure ACK is high before writing. This helped + * kill a problem with ADB and some iBooks + */ + wait_for_ack(); + /* set the shift register to shift out and send a byte */ + send_byte(req->data[0]); +} + +void +pmu_poll(void) +{ + if (!via) + return; + if (disable_poll) + return; + via_pmu_interrupt(0, NULL); +} + +void +pmu_poll_adb(void) +{ + if (!via) + return; + if (disable_poll) + return; + /* Kicks ADB read when PMU is suspended */ + adb_int_pending = 1; + do { + via_pmu_interrupt(0, NULL); + } while (pmu_suspended && (adb_int_pending || pmu_state != idle + || req_awaiting_reply)); +} + +void +pmu_wait_complete(struct adb_request *req) +{ + if (!via) + return; + while((pmu_state != idle && pmu_state != locked) || !req->complete) + via_pmu_interrupt(0, NULL); +} + +/* This function loops until the PMU is idle and prevents it from + * anwsering to ADB interrupts. pmu_request can still be called. + * This is done to avoid spurrious shutdowns when we know we'll have + * interrupts switched off for a long time + */ +void +pmu_suspend(void) +{ + unsigned long flags; + + if (!via) + return; + + spin_lock_irqsave(&pmu_lock, flags); + pmu_suspended++; + if (pmu_suspended > 1) { + spin_unlock_irqrestore(&pmu_lock, flags); + return; + } + + do { + spin_unlock_irqrestore(&pmu_lock, flags); + if (req_awaiting_reply) + adb_int_pending = 1; + via_pmu_interrupt(0, NULL); + spin_lock_irqsave(&pmu_lock, flags); + if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) { + if (gpio_irq >= 0) + disable_irq_nosync(gpio_irq); + out_8(&via[IER], CB1_INT | IER_CLR); + spin_unlock_irqrestore(&pmu_lock, flags); + break; + } + } while (1); +} + +void +pmu_resume(void) +{ + unsigned long flags; + + if (!via || (pmu_suspended < 1)) + return; + + spin_lock_irqsave(&pmu_lock, flags); + pmu_suspended--; + if (pmu_suspended > 0) { + spin_unlock_irqrestore(&pmu_lock, flags); + return; + } + adb_int_pending = 1; + if (gpio_irq >= 0) + enable_irq(gpio_irq); + out_8(&via[IER], CB1_INT | IER_SET); + spin_unlock_irqrestore(&pmu_lock, flags); + pmu_poll(); +} + +/* Interrupt data could be the result data from an ADB cmd */ +static void +pmu_handle_data(unsigned char *data, int len) +{ + unsigned char ints, pirq; + int i = 0; + + asleep = 0; + if (drop_interrupts || len < 1) { + adb_int_pending = 0; + pmu_irq_stats[8]++; + return; + } + + /* Get PMU interrupt mask */ + ints = data[0]; + + /* Record zero interrupts for stats */ + if (ints == 0) + pmu_irq_stats[9]++; + + /* Hack to deal with ADB autopoll flag */ + if (ints & PMU_INT_ADB) + ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL); + +next: + + if (ints == 0) { + if (i > pmu_irq_stats[10]) + pmu_irq_stats[10] = i; + return; + } + + for (pirq = 0; pirq < 8; pirq++) + if (ints & (1 << pirq)) + break; + pmu_irq_stats[pirq]++; + i++; + ints &= ~(1 << pirq); + + /* Note: for some reason, we get an interrupt with len=1, + * data[0]==0 after each normal ADB interrupt, at least + * on the Pismo. Still investigating... --BenH + */ + if ((1 << pirq) & PMU_INT_ADB) { + if ((data[0] & PMU_INT_ADB_AUTO) == 0) { + struct adb_request *req = req_awaiting_reply; + if (req == 0) { + printk(KERN_ERR "PMU: extra ADB reply\n"); + return; + } + req_awaiting_reply = NULL; + if (len <= 2) + req->reply_len = 0; + else { + memcpy(req->reply, data + 1, len - 1); + req->reply_len = len - 1; + } + pmu_done(req); + } else { + if (len == 4 && data[1] == 0x2c) { + extern int xmon_wants_key, xmon_adb_keycode; + if (xmon_wants_key) { + xmon_adb_keycode = data[2]; + return; + } + } +#ifdef CONFIG_ADB + /* + * XXX On the [23]400 the PMU gives us an up + * event for keycodes 0x74 or 0x75 when the PC + * card eject buttons are released, so we + * ignore those events. + */ + if (!(pmu_kind == PMU_OHARE_BASED && len == 4 + && data[1] == 0x2c && data[3] == 0xff + && (data[2] & ~1) == 0xf4)) + adb_input(data+1, len-1, 1); +#endif /* CONFIG_ADB */ + } + } + /* Sound/brightness button pressed */ + else if ((1 << pirq) & PMU_INT_SNDBRT) { +#ifdef CONFIG_PMAC_BACKLIGHT + if (len == 3) + pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4); +#endif + } + /* Tick interrupt */ + else if ((1 << pirq) & PMU_INT_TICK) { + /* Environement or tick interrupt, query batteries */ + if (pmu_battery_count) { + if ((--query_batt_timer) == 0) { + query_battery_state(); + query_batt_timer = BATTERY_POLLING_COUNT; + } + } + } + else if ((1 << pirq) & PMU_INT_ENVIRONMENT) { + if (pmu_battery_count) + query_battery_state(); + pmu_pass_intr(data, len); + /* len == 6 is probably a bad check. But how do I + * know what PMU versions send what events here? */ + if (len == 6) { + via_pmu_event(PMU_EVT_POWER, !!(data[1]&8)); + via_pmu_event(PMU_EVT_LID, data[1]&1); + } + } else { + pmu_pass_intr(data, len); + } + goto next; +} + +static struct adb_request* +pmu_sr_intr(void) +{ + struct adb_request *req; + int bite = 0; + + if (via[B] & TREQ) { + printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]); + out_8(&via[IFR], SR_INT); + return NULL; + } + /* The ack may not yet be low when we get the interrupt */ + while ((in_8(&via[B]) & TACK) != 0) + ; + + /* if reading grab the byte, and reset the interrupt */ + if (pmu_state == reading || pmu_state == reading_intr) + bite = in_8(&via[SR]); + + /* reset TREQ and wait for TACK to go high */ + out_8(&via[B], in_8(&via[B]) | TREQ); + wait_for_ack(); + + switch (pmu_state) { + case sending: + req = current_req; + if (data_len < 0) { + data_len = req->nbytes - 1; + send_byte(data_len); + break; + } + if (data_index <= data_len) { + send_byte(req->data[data_index++]); + break; + } + req->sent = 1; + data_len = pmu_data_len[req->data[0]][1]; + if (data_len == 0) { + pmu_state = idle; + current_req = req->next; + if (req->reply_expected) + req_awaiting_reply = req; + else + return req; + } else { + pmu_state = reading; + data_index = 0; + reply_ptr = req->reply + req->reply_len; + recv_byte(); + } + break; + + case intack: + data_index = 0; + data_len = -1; + pmu_state = reading_intr; + reply_ptr = interrupt_data[int_data_last]; + recv_byte(); + if (gpio_irq >= 0 && !gpio_irq_enabled) { + enable_irq(gpio_irq); + gpio_irq_enabled = 1; + } + break; + + case reading: + case reading_intr: + if (data_len == -1) { + data_len = bite; + if (bite > 32) + printk(KERN_ERR "PMU: bad reply len %d\n", bite); + } else if (data_index < 32) { + reply_ptr[data_index++] = bite; + } + if (data_index < data_len) { + recv_byte(); + break; + } + + if (pmu_state == reading_intr) { + pmu_state = idle; + int_data_state[int_data_last] = int_data_ready; + interrupt_data_len[int_data_last] = data_len; + } else { + req = current_req; + /* + * For PMU sleep and freq change requests, we lock the + * PMU until it's explicitly unlocked. This avoids any + * spurrious event polling getting in + */ + current_req = req->next; + req->reply_len += data_index; + if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED) + pmu_state = locked; + else + pmu_state = idle; + return req; + } + break; + + default: + printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n", + pmu_state); + } + return NULL; +} + +static irqreturn_t +via_pmu_interrupt(int irq, void *arg) +{ + unsigned long flags; + int intr; + int nloop = 0; + int int_data = -1; + struct adb_request *req = NULL; + int handled = 0; + + /* This is a bit brutal, we can probably do better */ + spin_lock_irqsave(&pmu_lock, flags); + ++disable_poll; + + for (;;) { + intr = in_8(&via[IFR]) & (SR_INT | CB1_INT); + if (intr == 0) + break; + handled = 1; + if (++nloop > 1000) { + printk(KERN_DEBUG "PMU: stuck in intr loop, " + "intr=%x, ier=%x pmu_state=%d\n", + intr, in_8(&via[IER]), pmu_state); + break; + } + out_8(&via[IFR], intr); + if (intr & CB1_INT) { + adb_int_pending = 1; + pmu_irq_stats[0]++; + } + if (intr & SR_INT) { + req = pmu_sr_intr(); + if (req) + break; + } + } + +recheck: + if (pmu_state == idle) { + if (adb_int_pending) { + if (int_data_state[0] == int_data_empty) + int_data_last = 0; + else if (int_data_state[1] == int_data_empty) + int_data_last = 1; + else + goto no_free_slot; + pmu_state = intack; + int_data_state[int_data_last] = int_data_fill; + /* Sounds safer to make sure ACK is high before writing. + * This helped kill a problem with ADB and some iBooks + */ + wait_for_ack(); + send_byte(PMU_INT_ACK); + adb_int_pending = 0; + } else if (current_req) + pmu_start(); + } +no_free_slot: + /* Mark the oldest buffer for flushing */ + if (int_data_state[!int_data_last] == int_data_ready) { + int_data_state[!int_data_last] = int_data_flush; + int_data = !int_data_last; + } else if (int_data_state[int_data_last] == int_data_ready) { + int_data_state[int_data_last] = int_data_flush; + int_data = int_data_last; + } + --disable_poll; + spin_unlock_irqrestore(&pmu_lock, flags); + + /* Deal with completed PMU requests outside of the lock */ + if (req) { + pmu_done(req); + req = NULL; + } + + /* Deal with interrupt datas outside of the lock */ + if (int_data >= 0) { + pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]); + spin_lock_irqsave(&pmu_lock, flags); + ++disable_poll; + int_data_state[int_data] = int_data_empty; + int_data = -1; + goto recheck; + } + + return IRQ_RETVAL(handled); +} + +void +pmu_unlock(void) +{ + unsigned long flags; + + spin_lock_irqsave(&pmu_lock, flags); + if (pmu_state == locked) + pmu_state = idle; + adb_int_pending = 1; + spin_unlock_irqrestore(&pmu_lock, flags); +} + + +static irqreturn_t +gpio1_interrupt(int irq, void *arg) +{ + unsigned long flags; + + if ((in_8(gpio_reg + 0x9) & 0x02) == 0) { + spin_lock_irqsave(&pmu_lock, flags); + if (gpio_irq_enabled > 0) { + disable_irq_nosync(gpio_irq); + gpio_irq_enabled = 0; + } + pmu_irq_stats[1]++; + adb_int_pending = 1; + spin_unlock_irqrestore(&pmu_lock, flags); + via_pmu_interrupt(0, NULL); + return IRQ_HANDLED; + } + return IRQ_NONE; +} + +void +pmu_enable_irled(int on) +{ + struct adb_request req; + + if (vias == NULL) + return ; + if (pmu_kind == PMU_KEYLARGO_BASED) + return ; + + pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED | + (on ? PMU_POW_ON : PMU_POW_OFF)); + pmu_wait_complete(&req); +} + +void +pmu_restart(void) +{ + struct adb_request req; + + if (via == NULL) + return; + + local_irq_disable(); + + drop_interrupts = 1; + + if (pmu_kind != PMU_KEYLARGO_BASED) { + pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB | + PMU_INT_TICK ); + while(!req.complete) + pmu_poll(); + } + + pmu_request(&req, NULL, 1, PMU_RESET); + pmu_wait_complete(&req); + for (;;) + ; +} + +void +pmu_shutdown(void) +{ + struct adb_request req; + + if (via == NULL) + return; + + local_irq_disable(); + + drop_interrupts = 1; + + if (pmu_kind != PMU_KEYLARGO_BASED) { + pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB | + PMU_INT_TICK ); + pmu_wait_complete(&req); + } else { + /* Disable server mode on shutdown or we'll just + * wake up again + */ + pmu_set_server_mode(0); + } + + pmu_request(&req, NULL, 5, PMU_SHUTDOWN, + 'M', 'A', 'T', 'T'); + pmu_wait_complete(&req); + for (;;) + ; +} + +int +pmu_present(void) +{ + return via != 0; +} + +#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) +/* + * Put the powerbook to sleep. + */ + +static u32 save_via[8]; + +static void +save_via_state(void) +{ + save_via[0] = in_8(&via[ANH]); + save_via[1] = in_8(&via[DIRA]); + save_via[2] = in_8(&via[B]); + save_via[3] = in_8(&via[DIRB]); + save_via[4] = in_8(&via[PCR]); + save_via[5] = in_8(&via[ACR]); + save_via[6] = in_8(&via[T1CL]); + save_via[7] = in_8(&via[T1CH]); +} +static void +restore_via_state(void) +{ + out_8(&via[ANH], save_via[0]); + out_8(&via[DIRA], save_via[1]); + out_8(&via[B], save_via[2]); + out_8(&via[DIRB], save_via[3]); + out_8(&via[PCR], save_via[4]); + out_8(&via[ACR], save_via[5]); + out_8(&via[T1CL], save_via[6]); + out_8(&via[T1CH], save_via[7]); + out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */ + out_8(&via[IFR], 0x7f); /* clear IFR */ + out_8(&via[IER], IER_SET | SR_INT | CB1_INT); +} + +#define GRACKLE_PM (1<<7) +#define GRACKLE_DOZE (1<<5) +#define GRACKLE_NAP (1<<4) +#define GRACKLE_SLEEP (1<<3) + +static int powerbook_sleep_grackle(void) +{ + unsigned long save_l2cr; + unsigned short pmcr1; + struct adb_request req; + struct pci_dev *grackle; + + grackle = pci_get_bus_and_slot(0, 0); + if (!grackle) + return -ENODEV; + + /* Turn off various things. Darwin does some retry tests here... */ + pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE); + pmu_wait_complete(&req); + pmu_request(&req, NULL, 2, PMU_POWER_CTRL, + PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY); + pmu_wait_complete(&req); + + /* For 750, save backside cache setting and disable it */ + save_l2cr = _get_L2CR(); /* (returns -1 if not available) */ + + if (!__fake_sleep) { + /* Ask the PMU to put us to sleep */ + pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); + pmu_wait_complete(&req); + } + + /* The VIA is supposed not to be restored correctly*/ + save_via_state(); + /* We shut down some HW */ + pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1); + + pci_read_config_word(grackle, 0x70, &pmcr1); + /* Apparently, MacOS uses NAP mode for Grackle ??? */ + pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP); + pmcr1 |= GRACKLE_PM|GRACKLE_NAP; + pci_write_config_word(grackle, 0x70, pmcr1); + + /* Call low-level ASM sleep handler */ + if (__fake_sleep) + mdelay(5000); + else + low_sleep_handler(); + + /* We're awake again, stop grackle PM */ + pci_read_config_word(grackle, 0x70, &pmcr1); + pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP); + pci_write_config_word(grackle, 0x70, pmcr1); + + pci_dev_put(grackle); + + /* Make sure the PMU is idle */ + pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0); + restore_via_state(); + + /* Restore L2 cache */ + if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0) + _set_L2CR(save_l2cr); + + /* Restore userland MMU context */ + switch_mmu_context(NULL, current->active_mm); + + /* Power things up */ + pmu_unlock(); + pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); + pmu_wait_complete(&req); + pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, + PMU_POW0_ON|PMU_POW0_HARD_DRIVE); + pmu_wait_complete(&req); + pmu_request(&req, NULL, 2, PMU_POWER_CTRL, + PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY); + pmu_wait_complete(&req); + + return 0; +} + +static int +powerbook_sleep_Core99(void) +{ + unsigned long save_l2cr; + unsigned long save_l3cr; + struct adb_request req; + + if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) { + printk(KERN_ERR "Sleep mode not supported on this machine\n"); + return -ENOSYS; + } + + if (num_online_cpus() > 1 || cpu_is_offline(0)) + return -EAGAIN; + + /* Stop environment and ADB interrupts */ + pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0); + pmu_wait_complete(&req); + + /* Tell PMU what events will wake us up */ + pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS, + 0xff, 0xff); + pmu_wait_complete(&req); + pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS, + 0, PMU_PWR_WAKEUP_KEY | + (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0)); + pmu_wait_complete(&req); + + /* Save the state of the L2 and L3 caches */ + save_l3cr = _get_L3CR(); /* (returns -1 if not available) */ + save_l2cr = _get_L2CR(); /* (returns -1 if not available) */ + + if (!__fake_sleep) { + /* Ask the PMU to put us to sleep */ + pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); + pmu_wait_complete(&req); + } + + /* The VIA is supposed not to be restored correctly*/ + save_via_state(); + + /* Shut down various ASICs. There's a chance that we can no longer + * talk to the PMU after this, so I moved it to _after_ sending the + * sleep command to it. Still need to be checked. + */ + pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1); + + /* Call low-level ASM sleep handler */ + if (__fake_sleep) + mdelay(5000); + else + low_sleep_handler(); + + /* Restore Apple core ASICs state */ + pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0); + + /* Restore VIA */ + restore_via_state(); + + /* tweak LPJ before cpufreq is there */ + loops_per_jiffy *= 2; + + /* Restore video */ + pmac_call_early_video_resume(); + + /* Restore L2 cache */ + if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0) + _set_L2CR(save_l2cr); + /* Restore L3 cache */ + if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0) + _set_L3CR(save_l3cr); + + /* Restore userland MMU context */ + switch_mmu_context(NULL, current->active_mm); + + /* Tell PMU we are ready */ + pmu_unlock(); + pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); + pmu_wait_complete(&req); + pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask); + pmu_wait_complete(&req); + + /* Restore LPJ, cpufreq will adjust the cpu frequency */ + loops_per_jiffy /= 2; + + return 0; +} + +#define PB3400_MEM_CTRL 0xf8000000 +#define PB3400_MEM_CTRL_SLEEP 0x70 + +static void __iomem *pb3400_mem_ctrl; + +static void powerbook_sleep_init_3400(void) +{ + /* map in the memory controller registers */ + pb3400_mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100); + if (pb3400_mem_ctrl == NULL) + printk(KERN_WARNING "ioremap failed: sleep won't be possible"); +} + +static int powerbook_sleep_3400(void) +{ + int i, x; + unsigned int hid0; + unsigned long msr; + struct adb_request sleep_req; + unsigned int __iomem *mem_ctrl_sleep; + + if (pb3400_mem_ctrl == NULL) + return -ENOMEM; + mem_ctrl_sleep = pb3400_mem_ctrl + PB3400_MEM_CTRL_SLEEP; + + /* Set the memory controller to keep the memory refreshed + while we're asleep */ + for (i = 0x403f; i >= 0x4000; --i) { + out_be32(mem_ctrl_sleep, i); + do { + x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff; + } while (x == 0); + if (x >= 0x100) + break; + } + + /* Ask the PMU to put us to sleep */ + pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T'); + pmu_wait_complete(&sleep_req); + pmu_unlock(); + + pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1); + + asleep = 1; + + /* Put the CPU into sleep mode */ + hid0 = mfspr(SPRN_HID0); + hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP; + mtspr(SPRN_HID0, hid0); + local_irq_enable(); + msr = mfmsr() | MSR_POW; + while (asleep) { + mb(); + mtmsr(msr); + isync(); + } + local_irq_disable(); + + /* OK, we're awake again, start restoring things */ + out_be32(mem_ctrl_sleep, 0x3f); + pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0); + + return 0; +} + +#endif /* CONFIG_SUSPEND && CONFIG_PPC32 */ + +/* + * Support for /dev/pmu device + */ +#define RB_SIZE 0x10 +struct pmu_private { + struct list_head list; + int rb_get; + int rb_put; + struct rb_entry { + unsigned short len; + unsigned char data[16]; + } rb_buf[RB_SIZE]; + wait_queue_head_t wait; + spinlock_t lock; +#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) + int backlight_locker; +#endif +}; + +static LIST_HEAD(all_pmu_pvt); +static DEFINE_SPINLOCK(all_pvt_lock); + +static void +pmu_pass_intr(unsigned char *data, int len) +{ + struct pmu_private *pp; + struct list_head *list; + int i; + unsigned long flags; + + if (len > sizeof(pp->rb_buf[0].data)) + len = sizeof(pp->rb_buf[0].data); + spin_lock_irqsave(&all_pvt_lock, flags); + for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) { + pp = list_entry(list, struct pmu_private, list); + spin_lock(&pp->lock); + i = pp->rb_put + 1; + if (i >= RB_SIZE) + i = 0; + if (i != pp->rb_get) { + struct rb_entry *rp = &pp->rb_buf[pp->rb_put]; + rp->len = len; + memcpy(rp->data, data, len); + pp->rb_put = i; + wake_up_interruptible(&pp->wait); + } + spin_unlock(&pp->lock); + } + spin_unlock_irqrestore(&all_pvt_lock, flags); +} + +static int +pmu_open(struct inode *inode, struct file *file) +{ + struct pmu_private *pp; + unsigned long flags; + + pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL); + if (pp == 0) + return -ENOMEM; + pp->rb_get = pp->rb_put = 0; + spin_lock_init(&pp->lock); + init_waitqueue_head(&pp->wait); + mutex_lock(&pmu_info_proc_mutex); + spin_lock_irqsave(&all_pvt_lock, flags); +#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) + pp->backlight_locker = 0; +#endif + list_add(&pp->list, &all_pmu_pvt); + spin_unlock_irqrestore(&all_pvt_lock, flags); + file->private_data = pp; + mutex_unlock(&pmu_info_proc_mutex); + return 0; +} + +static ssize_t +pmu_read(struct file *file, char __user *buf, + size_t count, loff_t *ppos) +{ + struct pmu_private *pp = file->private_data; + DECLARE_WAITQUEUE(wait, current); + unsigned long flags; + int ret = 0; + + if (count < 1 || pp == 0) + return -EINVAL; + if (!access_ok(VERIFY_WRITE, buf, count)) + return -EFAULT; + + spin_lock_irqsave(&pp->lock, flags); + add_wait_queue(&pp->wait, &wait); + set_current_state(TASK_INTERRUPTIBLE); + + for (;;) { + ret = -EAGAIN; + if (pp->rb_get != pp->rb_put) { + int i = pp->rb_get; + struct rb_entry *rp = &pp->rb_buf[i]; + ret = rp->len; + spin_unlock_irqrestore(&pp->lock, flags); + if (ret > count) + ret = count; + if (ret > 0 && copy_to_user(buf, rp->data, ret)) + ret = -EFAULT; + if (++i >= RB_SIZE) + i = 0; + spin_lock_irqsave(&pp->lock, flags); + pp->rb_get = i; + } + if (ret >= 0) + break; + if (file->f_flags & O_NONBLOCK) + break; + ret = -ERESTARTSYS; + if (signal_pending(current)) + break; + spin_unlock_irqrestore(&pp->lock, flags); + schedule(); + spin_lock_irqsave(&pp->lock, flags); + } + __set_current_state(TASK_RUNNING); + remove_wait_queue(&pp->wait, &wait); + spin_unlock_irqrestore(&pp->lock, flags); + + return ret; +} + +static ssize_t +pmu_write(struct file *file, const char __user *buf, + size_t count, loff_t *ppos) +{ + return 0; +} + +static unsigned int +pmu_fpoll(struct file *filp, poll_table *wait) +{ + struct pmu_private *pp = filp->private_data; + unsigned int mask = 0; + unsigned long flags; + + if (pp == 0) + return 0; + poll_wait(filp, &pp->wait, wait); + spin_lock_irqsave(&pp->lock, flags); + if (pp->rb_get != pp->rb_put) + mask |= POLLIN; + spin_unlock_irqrestore(&pp->lock, flags); + return mask; +} + +static int +pmu_release(struct inode *inode, struct file *file) +{ + struct pmu_private *pp = file->private_data; + unsigned long flags; + + if (pp != 0) { + file->private_data = NULL; + spin_lock_irqsave(&all_pvt_lock, flags); + list_del(&pp->list); + spin_unlock_irqrestore(&all_pvt_lock, flags); + +#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) + if (pp->backlight_locker) + pmac_backlight_enable(); +#endif + + kfree(pp); + } + return 0; +} + +#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) +static void pmac_suspend_disable_irqs(void) +{ + /* Call platform functions marked "on sleep" */ + pmac_pfunc_i2c_suspend(); + pmac_pfunc_base_suspend(); +} + +static int powerbook_sleep(suspend_state_t state) +{ + int error = 0; + + /* Wait for completion of async requests */ + while (!batt_req.complete) + pmu_poll(); + + /* Giveup the lazy FPU & vec so we don't have to back them + * up from the low level code + */ + enable_kernel_fp(); + +#ifdef CONFIG_ALTIVEC + if (cpu_has_feature(CPU_FTR_ALTIVEC)) + enable_kernel_altivec(); +#endif /* CONFIG_ALTIVEC */ + + switch (pmu_kind) { + case PMU_OHARE_BASED: + error = powerbook_sleep_3400(); + break; + case PMU_HEATHROW_BASED: + case PMU_PADDINGTON_BASED: + error = powerbook_sleep_grackle(); + break; + case PMU_KEYLARGO_BASED: + error = powerbook_sleep_Core99(); + break; + default: + return -ENOSYS; + } + + if (error) + return error; + + mdelay(100); + + return 0; +} + +static void pmac_suspend_enable_irqs(void) +{ + /* Force a poll of ADB interrupts */ + adb_int_pending = 1; + via_pmu_interrupt(0, NULL); + + mdelay(10); + + /* Call platform functions marked "on wake" */ + pmac_pfunc_base_resume(); + pmac_pfunc_i2c_resume(); +} + +static int pmu_sleep_valid(suspend_state_t state) +{ + return state == PM_SUSPEND_MEM + && (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) >= 0); +} + +static const struct platform_suspend_ops pmu_pm_ops = { + .enter = powerbook_sleep, + .valid = pmu_sleep_valid, +}; + +static int register_pmu_pm_ops(void) +{ + if (pmu_kind == PMU_OHARE_BASED) + powerbook_sleep_init_3400(); + ppc_md.suspend_disable_irqs = pmac_suspend_disable_irqs; + ppc_md.suspend_enable_irqs = pmac_suspend_enable_irqs; + suspend_set_ops(&pmu_pm_ops); + + return 0; +} + +device_initcall(register_pmu_pm_ops); +#endif + +static int pmu_ioctl(struct file *filp, + u_int cmd, u_long arg) +{ + __u32 __user *argp = (__u32 __user *)arg; + int error = -EINVAL; + + switch (cmd) { + case PMU_IOC_SLEEP: + if (!capable(CAP_SYS_ADMIN)) + return -EACCES; + return pm_suspend(PM_SUSPEND_MEM); + case PMU_IOC_CAN_SLEEP: + if (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) < 0) + return put_user(0, argp); + else + return put_user(1, argp); + +#ifdef CONFIG_PMAC_BACKLIGHT_LEGACY + /* Compatibility ioctl's for backlight */ + case PMU_IOC_GET_BACKLIGHT: + { + int brightness; + + brightness = pmac_backlight_get_legacy_brightness(); + if (brightness < 0) + return brightness; + else + return put_user(brightness, argp); + + } + case PMU_IOC_SET_BACKLIGHT: + { + int brightness; + + error = get_user(brightness, argp); + if (error) + return error; + + return pmac_backlight_set_legacy_brightness(brightness); + } +#ifdef CONFIG_INPUT_ADBHID + case PMU_IOC_GRAB_BACKLIGHT: { + struct pmu_private *pp = filp->private_data; + + if (pp->backlight_locker) + return 0; + + pp->backlight_locker = 1; + pmac_backlight_disable(); + + return 0; + } +#endif /* CONFIG_INPUT_ADBHID */ +#endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */ + + case PMU_IOC_GET_MODEL: + return put_user(pmu_kind, argp); + case PMU_IOC_HAS_ADB: + return put_user(pmu_has_adb, argp); + } + return error; +} + +static long pmu_unlocked_ioctl(struct file *filp, + u_int cmd, u_long arg) +{ + int ret; + + mutex_lock(&pmu_info_proc_mutex); + ret = pmu_ioctl(filp, cmd, arg); + mutex_unlock(&pmu_info_proc_mutex); + + return ret; +} + +#ifdef CONFIG_COMPAT +#define PMU_IOC_GET_BACKLIGHT32 _IOR('B', 1, compat_size_t) +#define PMU_IOC_SET_BACKLIGHT32 _IOW('B', 2, compat_size_t) +#define PMU_IOC_GET_MODEL32 _IOR('B', 3, compat_size_t) +#define PMU_IOC_HAS_ADB32 _IOR('B', 4, compat_size_t) +#define PMU_IOC_CAN_SLEEP32 _IOR('B', 5, compat_size_t) +#define PMU_IOC_GRAB_BACKLIGHT32 _IOR('B', 6, compat_size_t) + +static long compat_pmu_ioctl (struct file *filp, u_int cmd, u_long arg) +{ + switch (cmd) { + case PMU_IOC_SLEEP: + break; + case PMU_IOC_GET_BACKLIGHT32: + cmd = PMU_IOC_GET_BACKLIGHT; + break; + case PMU_IOC_SET_BACKLIGHT32: + cmd = PMU_IOC_SET_BACKLIGHT; + break; + case PMU_IOC_GET_MODEL32: + cmd = PMU_IOC_GET_MODEL; + break; + case PMU_IOC_HAS_ADB32: + cmd = PMU_IOC_HAS_ADB; + break; + case PMU_IOC_CAN_SLEEP32: + cmd = PMU_IOC_CAN_SLEEP; + break; + case PMU_IOC_GRAB_BACKLIGHT32: + cmd = PMU_IOC_GRAB_BACKLIGHT; + break; + default: + return -ENOIOCTLCMD; + } + return pmu_unlocked_ioctl(filp, cmd, (unsigned long)compat_ptr(arg)); +} +#endif + +static const struct file_operations pmu_device_fops = { + .read = pmu_read, + .write = pmu_write, + .poll = pmu_fpoll, + .unlocked_ioctl = pmu_unlocked_ioctl, +#ifdef CONFIG_COMPAT + .compat_ioctl = compat_pmu_ioctl, +#endif + .open = pmu_open, + .release = pmu_release, + .llseek = noop_llseek, +}; + +static struct miscdevice pmu_device = { + PMU_MINOR, "pmu", &pmu_device_fops +}; + +static int pmu_device_init(void) +{ + if (!via) + return 0; + if (misc_register(&pmu_device) < 0) + printk(KERN_ERR "via-pmu: cannot register misc device.\n"); + return 0; +} +device_initcall(pmu_device_init); + + +#ifdef DEBUG_SLEEP +static inline void +polled_handshake(volatile unsigned char __iomem *via) +{ + via[B] &= ~TREQ; eieio(); + while ((via[B] & TACK) != 0) + ; + via[B] |= TREQ; eieio(); + while ((via[B] & TACK) == 0) + ; +} + +static inline void +polled_send_byte(volatile unsigned char __iomem *via, int x) +{ + via[ACR] |= SR_OUT | SR_EXT; eieio(); + via[SR] = x; eieio(); + polled_handshake(via); +} + +static inline int +polled_recv_byte(volatile unsigned char __iomem *via) +{ + int x; + + via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio(); + x = via[SR]; eieio(); + polled_handshake(via); + x = via[SR]; eieio(); + return x; +} + +int +pmu_polled_request(struct adb_request *req) +{ + unsigned long flags; + int i, l, c; + volatile unsigned char __iomem *v = via; + + req->complete = 1; + c = req->data[0]; + l = pmu_data_len[c][0]; + if (l >= 0 && req->nbytes != l + 1) + return -EINVAL; + + local_irq_save(flags); + while (pmu_state != idle) + pmu_poll(); + + while ((via[B] & TACK) == 0) + ; + polled_send_byte(v, c); + if (l < 0) { + l = req->nbytes - 1; + polled_send_byte(v, l); + } + for (i = 1; i <= l; ++i) + polled_send_byte(v, req->data[i]); + + l = pmu_data_len[c][1]; + if (l < 0) + l = polled_recv_byte(v); + for (i = 0; i < l; ++i) + req->reply[i + req->reply_len] = polled_recv_byte(v); + + if (req->done) + (*req->done)(req); + + local_irq_restore(flags); + return 0; +} + +/* N.B. This doesn't work on the 3400 */ +void pmu_blink(int n) +{ + struct adb_request req; + + memset(&req, 0, sizeof(req)); + + for (; n > 0; --n) { + req.nbytes = 4; + req.done = NULL; + req.data[0] = 0xee; + req.data[1] = 4; + req.data[2] = 0; + req.data[3] = 1; + req.reply[0] = ADB_RET_OK; + req.reply_len = 1; + req.reply_expected = 0; + pmu_polled_request(&req); + mdelay(50); + req.nbytes = 4; + req.done = NULL; + req.data[0] = 0xee; + req.data[1] = 4; + req.data[2] = 0; + req.data[3] = 0; + req.reply[0] = ADB_RET_OK; + req.reply_len = 1; + req.reply_expected = 0; + pmu_polled_request(&req); + mdelay(50); + } + mdelay(50); +} +#endif /* DEBUG_SLEEP */ + +#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32) +int pmu_sys_suspended; + +static int pmu_syscore_suspend(void) +{ + /* Suspend PMU event interrupts */ + pmu_suspend(); + pmu_sys_suspended = 1; + +#ifdef CONFIG_PMAC_BACKLIGHT + /* Tell backlight code not to muck around with the chip anymore */ + pmu_backlight_set_sleep(1); +#endif + + return 0; +} + +static void pmu_syscore_resume(void) +{ + struct adb_request req; + + if (!pmu_sys_suspended) + return; + + /* Tell PMU we are ready */ + pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2); + pmu_wait_complete(&req); + +#ifdef CONFIG_PMAC_BACKLIGHT + /* Tell backlight code it can use the chip again */ + pmu_backlight_set_sleep(0); +#endif + /* Resume PMU event interrupts */ + pmu_resume(); + pmu_sys_suspended = 0; +} + +static struct syscore_ops pmu_syscore_ops = { + .suspend = pmu_syscore_suspend, + .resume = pmu_syscore_resume, +}; + +static int pmu_syscore_register(void) +{ + register_syscore_ops(&pmu_syscore_ops); + + return 0; +} +subsys_initcall(pmu_syscore_register); +#endif /* CONFIG_SUSPEND && CONFIG_PPC32 */ + +EXPORT_SYMBOL(pmu_request); +EXPORT_SYMBOL(pmu_queue_request); +EXPORT_SYMBOL(pmu_poll); +EXPORT_SYMBOL(pmu_poll_adb); +EXPORT_SYMBOL(pmu_wait_complete); +EXPORT_SYMBOL(pmu_suspend); +EXPORT_SYMBOL(pmu_resume); +EXPORT_SYMBOL(pmu_unlock); +#if defined(CONFIG_PPC32) +EXPORT_SYMBOL(pmu_enable_irled); +EXPORT_SYMBOL(pmu_battery_count); +EXPORT_SYMBOL(pmu_batteries); +EXPORT_SYMBOL(pmu_power_flags); +#endif /* CONFIG_SUSPEND && CONFIG_PPC32 */ + |