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/*
* 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 Benjamin Herrenschmidt
*
* todo: - Cleanup synchro between VIA interrupt and GPIO-based PMU
* interrupt.
*
*
*/
#include <stdarg.h>
#include <linux/config.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/smp_lock.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/pm.h>
#include <linux/proc_fs.h>
#include <linux/init.h>
#include <asm/prom.h>
#include <asm/machdep.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/system.h>
#include <asm/sections.h>
#include <asm/irq.h>
#include <asm/hardirq.h>
#include <asm/pmac_feature.h>
#include <asm/uaccess.h>
#include <asm/mmu_context.h>
#include <asm/sections.h>
#include <asm/cputable.h>
#include <asm/time.h>
#ifdef CONFIG_PMAC_BACKLIGHT
#include <asm/backlight.h>
#endif
/* Some compile options */
#undef SUSPEND_USES_PMU
#define DEBUG_SLEEP
#undef HACKED_PCI_SAVE
/* Misc minor number allocated for /dev/pmu */
#define PMU_MINOR 154
/* How many iterations between battery polls */
#define BATTERY_POLLING_COUNT 2
static volatile unsigned char *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,
} pmu_state;
static struct adb_request *current_req;
static struct adb_request *last_req;
static struct adb_request *req_awaiting_reply;
static unsigned char interrupt_data[256]; /* Made bigger: I've been told that might happen */
static unsigned char *reply_ptr;
static int data_index;
static int data_len;
static volatile int adb_int_pending;
static struct adb_request bright_req_1, bright_req_2, bright_req_3;
static struct device_node *vias;
static int pmu_kind = PMU_UNKNOWN;
static int pmu_fully_inited = 0;
static int pmu_has_adb;
static unsigned char *gpio_reg = NULL;
static int gpio_irq = -1;
static volatile int pmu_suspended = 0;
static spinlock_t pmu_lock;
static u8 pmu_intr_mask;
static int pmu_version;
static int drop_interrupts;
#ifdef CONFIG_PMAC_PBOOK
static int option_lid_wakeup = 1;
static int sleep_in_progress;
static int can_sleep;
#endif /* CONFIG_PMAC_PBOOK */
static struct proc_dir_entry *proc_pmu_root;
static struct proc_dir_entry *proc_pmu_info;
static struct proc_dir_entry *proc_pmu_options;
#ifdef CONFIG_PMAC_PBOOK
int pmu_battery_count;
int pmu_cur_battery;
unsigned int pmu_power_flags;
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];
#endif /* CONFIG_PMAC_PBOOK */
int __fake_sleep;
int asleep;
struct notifier_block *sleep_notifier_list;
#ifdef CONFIG_ADB
static int adb_dev_map = 0;
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 int pmu_queue_request(struct adb_request *req);
static void pmu_start(void);
static void via_pmu_interrupt(int irq, void *arg, struct pt_regs *regs);
static void send_byte(int x);
static void recv_byte(void);
static void pmu_sr_intr(struct pt_regs *regs);
static void pmu_done(struct adb_request *req);
static void pmu_handle_data(unsigned char *data, int len,
struct pt_regs *regs);
static void gpio1_interrupt(int irq, void *arg, struct pt_regs *regs);
static int proc_get_info(char *page, char **start, off_t off,
int count, int *eof, void *data);
#ifdef CONFIG_PMAC_BACKLIGHT
static int pmu_set_backlight_level(int level, void* data);
static int pmu_set_backlight_enable(int on, int level, void* data);
#endif /* CONFIG_PMAC_BACKLIGHT */
#ifdef CONFIG_PMAC_PBOOK
static void pmu_pass_intr(unsigned char *data, int len);
static int proc_get_batt(char *page, char **start, off_t off,
int count, int *eof, void *data);
#endif /* CONFIG_PMAC_PBOOK */
static int proc_read_options(char *page, char **start, off_t off,
int count, int *eof, void *data);
static int proc_write_options(struct file *file, const char *buffer,
unsigned long count, void *data);
#ifdef CONFIG_ADB
struct adb_driver via_pmu_driver = {
"PMU",
pmu_probe,
pmu_init,
pmu_send_request,
pmu_adb_autopoll,
pmu_poll,
pmu_adb_reset_bus
};
#endif /* CONFIG_ADB */
extern void low_sleep_handler(void);
extern void pmac_sleep_save_intrs(int);
extern void pmac_sleep_restore_intrs(void);
extern void openpic_sleep_save_intrs(void);
extern void openpic_sleep_restore_intrs(void);
extern void enable_kernel_altivec(void);
extern void enable_kernel_fp(void);
#ifdef DEBUG_SLEEP
int pmu_polled_request(struct adb_request *req);
int pmu_wink(struct adb_request *req);
#endif
#if defined(CONFIG_PMAC_PBOOK) && defined(CONFIG_PM)
static int generic_notify_sleep(struct pmu_sleep_notifier *self, int when);
static struct pmu_sleep_notifier generic_sleep_notifier = {
generic_notify_sleep,
SLEEP_LEVEL_MISC,
};
#endif /* defined(CONFIG_PMAC_PBOOK) && defined(CONFIG_PM) */
/*
* 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] __openfirmwaredata = {
/* 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"
};
#ifdef CONFIG_PMAC_BACKLIGHT
static struct backlight_controller pmu_backlight_controller = {
pmu_set_backlight_enable,
pmu_set_backlight_level
};
#endif /* CONFIG_PMAC_BACKLIGHT */
int __openfirmware
find_via_pmu()
{
if (via != 0)
return 1;
vias = find_devices("via-pmu");
if (vias == 0)
return 0;
if (vias->next != 0)
printk(KERN_WARNING "Warning: only using 1st via-pmu\n");
if (vias->n_addrs < 1 || vias->n_intrs < 1) {
printk(KERN_ERR "via-pmu: %d addresses, %d interrupts!\n",
vias->n_addrs, vias->n_intrs);
if (vias->n_addrs < 1 || vias->n_intrs < 1)
return 0;
}
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)
|| device_is_compatible(vias->parent, "ohare")))
pmu_kind = PMU_OHARE_BASED;
else if (device_is_compatible(vias->parent, "paddington"))
pmu_kind = PMU_PADDINGTON_BASED;
else if (device_is_compatible(vias->parent, "heathrow"))
pmu_kind = PMU_HEATHROW_BASED;
else if (device_is_compatible(vias->parent, "Keylargo")) {
struct device_node *gpio, *gpiop;
pmu_kind = PMU_KEYLARGO_BASED;
pmu_has_adb = (find_type_devices("adb") != NULL);
pmu_intr_mask = PMU_INT_PCEJECT |
PMU_INT_SNDBRT |
PMU_INT_ADB |
PMU_INT_TICK |
PMU_INT_ENVIRONMENT;
gpiop = find_devices("gpio");
if (gpiop && gpiop->n_addrs) {
gpio_reg = ioremap(gpiop->addrs->address, 0x10);
gpio = find_devices("extint-gpio1");
if (gpio && gpio->parent == gpiop && gpio->n_intrs)
gpio_irq = gpio->intrs[0].line;
}
} else
pmu_kind = PMU_UNKNOWN;
#ifdef CONFIG_PMAC_PBOOK
if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
can_sleep = 1;
#endif /* CONFIG_PMAC_PBOOK */
via = (volatile unsigned char *) ioremap(vias->addrs->address, 0x2000);
out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */
out_8(&via[IFR], 0x7f); /* clear IFR */
pmu_state = idle;
if (!init_pmu()) {
via = NULL;
return 0;
}
printk(KERN_INFO "PMU driver %d initialized for %s, firmware: %02x\n",
PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
sys_ctrler = SYS_CTRLER_PMU;
#if defined(CONFIG_PMAC_PBOOK) && defined(CONFIG_PM)
pmu_register_sleep_notifier(&generic_sleep_notifier);
pm_active = 1;
#endif
return 1;
}
#ifdef CONFIG_ADB
static int __openfirmware
pmu_probe()
{
return vias == NULL? -ENODEV: 0;
}
static int __openfirmware
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.
* This is called from arch/ppc/kernel/pmac_setup.c:pmac_init2().
*/
int via_pmu_start(void)
{
if (vias == NULL)
return -ENODEV;
request_OF_resource(vias, 0, NULL);
bright_req_1.complete = 1;
bright_req_2.complete = 1;
bright_req_3.complete = 1;
#ifdef CONFIG_PMAC_PBOOK
batt_req.complete = 1;
#endif
if (request_irq(vias->intrs[0].line, via_pmu_interrupt, 0, "VIA-PMU",
(void *)0)) {
printk(KERN_ERR "VIA-PMU: can't get irq %d\n",
vias->intrs[0].line);
return -EAGAIN;
}
if (pmu_kind == PMU_KEYLARGO_BASED && gpio_irq != -1) {
if (request_irq(gpio_irq, gpio1_interrupt, 0, "GPIO1/ADB", (void *)0))
printk(KERN_ERR "pmu: can't get irq %d (GPIO1)\n", gpio_irq);
}
/* Enable interrupts */
out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
pmu_fully_inited = 1;
#ifdef CONFIG_PMAC_BACKLIGHT
/* Enable backlight */
register_backlight_controller(&pmu_backlight_controller, NULL, "pmu");
#endif /* CONFIG_PMAC_BACKLIGHT */
#ifdef CONFIG_PMAC_PBOOK
if (machine_is_compatible("AAPL,3400/2400") ||
machine_is_compatible("AAPL,3500"))
pmu_battery_count = 1;
else if (machine_is_compatible("AAPL,PowerBook1998") ||
machine_is_compatible("PowerBook1,1"))
pmu_battery_count = 2;
else {
struct device_node* prim = find_devices("power-mgt");
u32 *prim_info = NULL;
if (prim)
prim_info = (u32 *)get_property(prim, "prim-info", NULL);
if (prim_info) {
/* Other stuffs here yet unknown */
pmu_battery_count = (prim_info[6] >> 16) & 0xff;
}
}
#endif /* CONFIG_PMAC_PBOOK */
/* Create /proc/pmu */
proc_pmu_root = proc_mkdir("pmu", 0);
if (proc_pmu_root) {
int i;
proc_pmu_info = create_proc_read_entry("info", 0, proc_pmu_root,
proc_get_info, NULL);
#ifdef CONFIG_PMAC_PBOOK
for (i=0; i<pmu_battery_count; i++) {
char title[16];
sprintf(title, "battery_%d", i);
proc_pmu_batt[i] = create_proc_read_entry(title, 0, proc_pmu_root,
proc_get_batt, (void *)i);
}
#endif /* CONFIG_PMAC_PBOOK */
proc_pmu_options = create_proc_entry("options", 0600, proc_pmu_root);
if (proc_pmu_options) {
proc_pmu_options->nlink = 1;
proc_pmu_options->read_proc = proc_read_options;
proc_pmu_options->write_proc = proc_write_options;
}
}
/* 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;
}
static int __openfirmware
init_pmu()
{
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] = 1;
while (interrupt_data[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, 0, 0);
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);
while (!req.complete)
pmu_poll();
if (req.reply_len > 0)
pmu_version = req.reply[0];
return 1;
}
int
pmu_get_model(void)
{
return pmu_kind;
}
#ifdef CONFIG_PMAC_PBOOK
/*
* WARNING ! This code probably needs some debugging... -- BenH.
*/
static void __pmac
done_battery_state_ohare(struct adb_request* req)
{
unsigned int bat_flags = 0;
int current = 0;
unsigned int capa, max, voltage, time;
int lrange[] = { 0, 275, 850, 1680, 2325,
2765, 3160, 3500, 3830, 4115,
4360, 4585, 4795, 4990, 5170,
5340, 5510, 5710, 5930, 6150,
6370, 6500
};
if (req->reply[0] & 0x01)
pmu_power_flags |= PMU_PWR_AC_PRESENT;
else
pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
if (req->reply[0] & 0x04) {
int vb, i, j, charge, pcharge;
bat_flags |= PMU_BATT_PRESENT;
vb = (req->reply[1] << 8) | req->reply[2];
voltage = ((vb * 2650) + 726650)/100;
current = *((signed char *)&req->reply[5]);
if ((req->reply[0] & 0x01) == 0 && (current > 200))
vb += (current - 200) * 15;
else if (req->reply[0] & 0x02)
vb = (vb - 10) * 100;
i = (33000 - vb) / 10;
j = i - (i % 100);
if (j <= 0)
charge = 0;
else if (j >= 21)
charge = 650000;
else
charge = (lrange[j + 1] - lrange[j]) * (i - j) + (lrange[j] * 100);
charge = (1000 - charge / 650) / 10;
if (req->reply[0] & 0x40) {
pcharge = (req->reply[6] << 8) + req->reply[7];
if (pcharge > 6500)
pcharge = 6500;
pcharge *= 100;
pcharge = (1000 - pcharge / 650) / 10;
if (pcharge < charge)
charge = pcharge;
}
capa = charge;
max = 100;
time = (charge * 274) / current;
current = -current;
} else
capa = max = current = voltage = time = 0;
if ((req->reply[0] & 0x02) && (current > 0))
bat_flags |= PMU_BATT_CHARGING;
if (req->reply[0] & 0x04) /* CHECK THIS ONE */
bat_flags |= PMU_BATT_PRESENT;
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].current = current;
pmu_batteries[pmu_cur_battery].voltage = voltage;
pmu_batteries[pmu_cur_battery].time_remaining = time;
}
static void __pmac
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 = 0;
int current;
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;
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];
current = *((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];
current = *((signed short *)&req->reply[6]);
voltage = (req->reply[8] << 8) | req->reply[9];
break;
default:
printk(KERN_WARNING "pmu.c : unrecognized battery info, len: %d, %02x %02x %02x %02x\n",
req->reply_len, req->reply[0], req->reply[1], req->reply[2], req->reply[3]);
break;
}
} else
capa = max = current = voltage = 0;
if ((req->reply[1] & 0x01) && (current > 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].current = current;
pmu_batteries[pmu_cur_battery].voltage = voltage;
if (current) {
if ((req->reply[1] & 0x01) && (current > 0))
pmu_batteries[pmu_cur_battery].time_remaining
= ((max-capa) * 3600) / current;
else
pmu_batteries[pmu_cur_battery].time_remaining
= (capa * 3600) / (-current);
} else
pmu_batteries[pmu_cur_battery].time_remaining = 0;
pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
}
static void __pmac
query_battery_state(void)
{
if (!batt_req.complete)
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);
}
#endif /* CONFIG_PMAC_PBOOK */
static int
proc_get_info(char *page, char **start, off_t off,
int count, int *eof, void *data)
{
char* p = page;
p += sprintf(p, "PMU driver version : %d\n", PMU_DRIVER_VERSION);
p += sprintf(p, "PMU firmware version : %02x\n", pmu_version);
#ifdef CONFIG_PMAC_PBOOK
p += sprintf(p, "AC Power : %d\n",
((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0));
p += sprintf(p, "Battery count : %d\n", pmu_battery_count);
#endif /* CONFIG_PMAC_PBOOK */
return p - page;
}
#ifdef CONFIG_PMAC_PBOOK
static int
proc_get_batt(char *page, char **start, off_t off,
int count, int *eof, void *data)
{
int batnum = (int)data;
char *p = page;
p += sprintf(p, "\n");
p += sprintf(p, "flags : %08x\n",
pmu_batteries[batnum].flags);
p += sprintf(p, "charge : %d\n",
pmu_batteries[batnum].charge);
p += sprintf(p, "max_charge : %d\n",
pmu_batteries[batnum].max_charge);
p += sprintf(p, "current : %d\n",
pmu_batteries[batnum].current);
p += sprintf(p, "voltage : %d\n",
pmu_batteries[batnum].voltage);
p += sprintf(p, "time rem. : %d\n",
pmu_batteries[batnum].time_remaining);
return p - page;
}
#endif /* CONFIG_PMAC_PBOOK */
static int
proc_read_options(char *page, char **start, off_t off,
int count, int *eof, void *data)
{
char *p = page;
#ifdef CONFIG_PMAC_PBOOK
if (pmu_kind == PMU_KEYLARGO_BASED && can_sleep)
p += sprintf(p, "lid_wakeup=%d\n", option_lid_wakeup);
#endif /* CONFIG_PMAC_PBOOK */
return p - page;
}
static int
proc_write_options(struct file *file, const char *buffer,
unsigned long count, void *data)
{
char tmp[33];
char *label, *val;
unsigned long 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++;
#ifdef CONFIG_PMAC_PBOOK
if (pmu_kind == PMU_KEYLARGO_BASED && can_sleep)
if (!strcmp(label, "lid_wakeup"))
option_lid_wakeup = ((*val) == '1');
#endif /* CONFIG_PMAC_PBOOK */
return fcount;
}
#ifdef CONFIG_ADB
/* Send an ADB command */
static int __openfirmware
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 __openfirmware
pmu_adb_autopoll(int devs)
{
struct adb_request req;
if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
return -ENXIO;
if (devs) {
adb_dev_map = 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;
}
/* Reset the ADB bus */
static int __openfirmware
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 = 5;
req.done = NULL;
req.data[0] = PMU_ADB_CMD;
req.data[1] = 0;
req.data[2] = ADB_BUSRESET;
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;
}
while (!req.complete)
pmu_poll();
if (save_autopoll != 0)
pmu_adb_autopoll(save_autopoll);
return 0;
}
#endif /* CONFIG_ADB */
/* Construct and send a pmu request */
int __openfirmware
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 __openfirmware
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 = 0;
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 void __openfirmware
wait_for_ack(void)
{
/* Sightly increased the delay, I had one occurence 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 void __openfirmware
send_byte(int x)
{
volatile unsigned char *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 void __openfirmware
recv_byte()
{
volatile unsigned char *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 volatile int disable_poll;
static void __openfirmware
pmu_start()
{
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 __openfirmware
pmu_poll()
{
if (!via)
return;
if (disable_poll)
return;
/* Kicks ADB read when PMU is suspended */
if (pmu_suspended)
adb_int_pending = 1;
do {
via_pmu_interrupt(0, 0, 0);
} while (pmu_suspended && (adb_int_pending || pmu_state != idle
|| req_awaiting_reply));
}
/* 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 __openfirmware
pmu_suspend(void)
{
unsigned long flags;
#ifdef SUSPEND_USES_PMU
struct adb_request *req;
#endif
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(&pmu_lock);
via_pmu_interrupt(0, 0, 0);
spin_lock(&pmu_lock);
if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
#ifdef SUSPEND_USES_PMU
pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
spin_unlock_irqrestore(&pmu_lock, flags);
while(!req.complete)
pmu_poll();
#else /* SUSPEND_USES_PMU */
if (gpio_irq >= 0)
disable_irq(gpio_irq);
out_8(&via[IER], CB1_INT | IER_CLR);
spin_unlock_irqrestore(&pmu_lock, flags);
#endif /* SUSPEND_USES_PMU */
break;
}
} while (1);
}
void __openfirmware
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;
#ifdef SUSPEND_USES_PMU
pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
spin_unlock_irqrestore(&pmu_lock, flags);
while(!req.complete)
pmu_poll();
#else /* SUSPEND_USES_PMU */
if (gpio_irq >= 0)
enable_irq(gpio_irq);
out_8(&via[IER], CB1_INT | IER_SET);
spin_unlock_irqrestore(&pmu_lock, flags);
pmu_poll();
#endif /* SUSPEND_USES_PMU */
}
static void __openfirmware
via_pmu_interrupt(int irq, void *arg, struct pt_regs *regs)
{
unsigned long flags;
int intr;
int nloop = 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;
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 & SR_INT)
pmu_sr_intr(regs);
if (intr & CB1_INT)
adb_int_pending = 1;
}
if (pmu_state == idle) {
if (adb_int_pending) {
pmu_state = intack;
/* 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();
}
--disable_poll;
spin_unlock_irqrestore(&pmu_lock, flags);
}
static void __openfirmware
gpio1_interrupt(int irq, void *arg, struct pt_regs *regs)
{
if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
adb_int_pending = 1;
via_pmu_interrupt(0, 0, 0);
}
}
static void __openfirmware
pmu_sr_intr(struct pt_regs *regs)
{
struct adb_request *req;
int bite;
if (via[B] & TREQ) {
printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]);
out_8(&via[IFR], SR_INT);
return;
}
/* 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 {
spin_unlock(&pmu_lock);
pmu_done(req);
spin_lock(&pmu_lock);
}
} 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;
recv_byte();
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) {
spin_unlock(&pmu_lock);
pmu_handle_data(interrupt_data, data_index, regs);
spin_lock(&pmu_lock);
} else {
req = current_req;
current_req = req->next;
req->reply_len += data_index;
spin_unlock(&pmu_lock);
pmu_done(req);
spin_lock(&pmu_lock);
}
pmu_state = idle;
break;
default:
printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
pmu_state);
}
}
static void __openfirmware
pmu_done(struct adb_request *req)
{
req->complete = 1;
if (req->done)
(*req->done)(req);
}
/* Interrupt data could be the result data from an ADB cmd */
static void __openfirmware
pmu_handle_data(unsigned char *data, int len, struct pt_regs *regs)
{
asleep = 0;
if (drop_interrupts || len < 1) {
adb_int_pending = 0;
return;
}
/* 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 (data[0] & 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 = 0;
if (len <= 2)
req->reply_len = 0;
else {
memcpy(req->reply, data + 1, len - 1);
req->reply_len = len - 1;
}
pmu_done(req);
} else {
#ifdef CONFIG_XMON
if (len == 4 && data[1] == 0x2c) {
extern int xmon_wants_key, xmon_adb_keycode;
if (xmon_wants_key) {
xmon_adb_keycode = data[2];
return;
}
}
#endif /* CONFIG_XMON */
#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, regs, 1);
#endif /* CONFIG_ADB */
}
} else {
/* Sound/brightness button pressed */
if ((data[0] & PMU_INT_SNDBRT) && len == 3) {
#ifdef CONFIG_PMAC_BACKLIGHT
set_backlight_level(data[1] >> 4);
#endif
}
#ifdef CONFIG_PMAC_PBOOK
/* Environement or tick interrupt, query batteries */
if (pmu_battery_count && (data[0] & PMU_INT_TICK)) {
if ((--query_batt_timer) == 0) {
query_battery_state();
query_batt_timer = BATTERY_POLLING_COUNT;
}
} else if (pmu_battery_count && (data[0] & PMU_INT_ENVIRONMENT))
query_battery_state();
if (data[0])
pmu_pass_intr(data, len);
#endif /* CONFIG_PMAC_PBOOK */
}
}
#ifdef CONFIG_PMAC_BACKLIGHT
static int backlight_to_bright[] = {
0x7f, 0x46, 0x42, 0x3e, 0x3a, 0x36, 0x32, 0x2e,
0x2a, 0x26, 0x22, 0x1e, 0x1a, 0x16, 0x12, 0x0e
};
static int __openfirmware
pmu_set_backlight_enable(int on, int level, void* data)
{
struct adb_request req;
if (vias == NULL)
return -ENODEV;
if (on) {
pmu_request(&req, NULL, 2, PMU_BACKLIGHT_BRIGHT,
backlight_to_bright[level]);
while (!req.complete)
pmu_poll();
}
pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
PMU_POW_BACKLIGHT | (on ? PMU_POW_ON : PMU_POW_OFF));
while (!req.complete)
pmu_poll();
return 0;
}
static int __openfirmware
pmu_set_backlight_level(int level, void* data)
{
if (vias == NULL)
return -ENODEV;
if (!bright_req_1.complete)
return -EAGAIN;
pmu_request(&bright_req_1, NULL, 2, PMU_BACKLIGHT_BRIGHT,
backlight_to_bright[level]);
if (!bright_req_2.complete)
return -EAGAIN;
pmu_request(&bright_req_2, NULL, 2, PMU_POWER_CTRL, PMU_POW_BACKLIGHT
| (level > BACKLIGHT_OFF ? PMU_POW_ON : PMU_POW_OFF));
return 0;
}
#endif /* CONFIG_PMAC_BACKLIGHT */
void __openfirmware
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));
while (!req.complete)
pmu_poll();
}
void __openfirmware
pmu_restart(void)
{
struct adb_request req;
cli();
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);
while(!req.complete || (pmu_state != idle))
pmu_poll();
for (;;)
;
}
void __openfirmware
pmu_shutdown(void)
{
struct adb_request req;
cli();
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, 5, PMU_SHUTDOWN,
'M', 'A', 'T', 'T');
while(!req.complete || (pmu_state != idle))
pmu_poll();
for (;;)
;
}
int
pmu_present(void)
{
return via != 0;
}
#ifdef CONFIG_PMAC_PBOOK
static LIST_HEAD(sleep_notifiers);
#ifdef CONFIG_PM
static int
generic_notify_sleep(struct pmu_sleep_notifier *self, int when)
{
switch (when) {
case PBOOK_SLEEP_NOW:
if (pm_send_all(PM_SUSPEND, (void *)3))
return PBOOK_SLEEP_REJECT;
break;
case PBOOK_WAKE:
(void) pm_send_all(PM_RESUME, (void *)0);
}
return PBOOK_SLEEP_OK;
}
#endif /* CONFIG_PM */
int
pmu_register_sleep_notifier(struct pmu_sleep_notifier *n)
{
struct list_head *list;
struct pmu_sleep_notifier *notifier;
for (list = sleep_notifiers.next; list != &sleep_notifiers;
list = list->next) {
notifier = list_entry(list, struct pmu_sleep_notifier, list);
if (n->priority > notifier->priority)
break;
}
__list_add(&n->list, list->prev, list);
return 0;
}
int
pmu_unregister_sleep_notifier(struct pmu_sleep_notifier* n)
{
if (n->list.next == 0)
return -ENOENT;
list_del(&n->list);
n->list.next = 0;
return 0;
}
/* Sleep is broadcast last-to-first */
static int
broadcast_sleep(int when, int fallback)
{
int ret = PBOOK_SLEEP_OK;
struct list_head *list;
struct pmu_sleep_notifier *notifier;
for (list = sleep_notifiers.prev; list != &sleep_notifiers;
list = list->prev) {
notifier = list_entry(list, struct pmu_sleep_notifier, list);
ret = notifier->notifier_call(notifier, when);
if (ret != PBOOK_SLEEP_OK) {
printk(KERN_DEBUG "sleep %d rejected by %p (%p)\n",
when, notifier, notifier->notifier_call);
for (; list != &sleep_notifiers; list = list->next) {
notifier = list_entry(list, struct pmu_sleep_notifier, list);
notifier->notifier_call(notifier, fallback);
}
return ret;
}
}
return ret;
}
/* Wake is broadcast first-to-last */
static int
broadcast_wake(void)
{
int ret = PBOOK_SLEEP_OK;
struct list_head *list;
struct pmu_sleep_notifier *notifier;
for (list = sleep_notifiers.next; list != &sleep_notifiers;
list = list->next) {
notifier = list_entry(list, struct pmu_sleep_notifier, list);
notifier->notifier_call(notifier, PBOOK_WAKE);
}
return ret;
}
/*
* This struct is used to store config register values for
* PCI devices which may get powered off when we sleep.
*/
static struct pci_save {
#ifndef HACKED_PCI_SAVE
u16 command;
u16 cache_lat;
u16 intr;
u32 rom_address;
#else
u32 config[16];
#endif
} *pbook_pci_saves;
static int n_pbook_pci_saves;
static void __openfirmware
pbook_pci_save(void)
{
int npci;
struct pci_dev *pd;
struct pci_save *ps;
npci = 0;
pci_for_each_dev(pd) {
++npci;
}
n_pbook_pci_saves = npci;
if (npci == 0)
return;
ps = (struct pci_save *) kmalloc(npci * sizeof(*ps), GFP_KERNEL);
pbook_pci_saves = ps;
if (ps == NULL)
return;
pci_for_each_dev(pd) {
#ifndef HACKED_PCI_SAVE
pci_read_config_word(pd, PCI_COMMAND, &ps->command);
pci_read_config_word(pd, PCI_CACHE_LINE_SIZE, &ps->cache_lat);
pci_read_config_word(pd, PCI_INTERRUPT_LINE, &ps->intr);
pci_read_config_dword(pd, PCI_ROM_ADDRESS, &ps->rom_address);
#else
int i;
for (i=1;i<16;i++)
pci_read_config_dword(pd, i<<4, &ps->config[i]);
#endif
++ps;
}
}
/* For this to work, we must take care of a few things: If gmac was enabled
* during boot, it will be in the pci dev list. If it's disabled at this point
* (and it will probably be), then you can't access it's config space.
*/
static void __openfirmware
pbook_pci_restore(void)
{
u16 cmd;
struct pci_save *ps = pbook_pci_saves - 1;
struct pci_dev *pd;
int j;
pci_for_each_dev(pd) {
#ifdef HACKED_PCI_SAVE
int i;
ps++;
for (i=2;i<16;i++)
pci_write_config_dword(pd, i<<4, ps->config[i]);
pci_write_config_dword(pd, 4, ps->config[1]);
#else
if (ps->command == 0)
continue;
pci_read_config_word(pd, PCI_COMMAND, &cmd);
if ((ps->command & ~cmd) == 0)
continue;
switch (pd->hdr_type) {
case PCI_HEADER_TYPE_NORMAL:
for (j = 0; j < 6; ++j)
pci_write_config_dword(pd,
PCI_BASE_ADDRESS_0 + j*4,
pd->resource[j].start);
pci_write_config_dword(pd, PCI_ROM_ADDRESS,
ps->rom_address);
pci_write_config_word(pd, PCI_CACHE_LINE_SIZE,
ps->cache_lat);
pci_write_config_word(pd, PCI_INTERRUPT_LINE,
ps->intr);
pci_write_config_word(pd, PCI_COMMAND, ps->command);
break;
}
#endif
}
}
#ifdef DEBUG_SLEEP
/* 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
/*
* 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);
}
static inline void wakeup_decrementer(void)
{
set_dec(tb_ticks_per_jiffy);
/* No currently-supported powerbook has a 601,
* so use get_tbl, not native
*/
last_jiffy_stamp(0) = tb_last_stamp = get_tbl();
}
#define GRACKLE_PM (1<<7)
#define GRACKLE_DOZE (1<<5)
#define GRACKLE_NAP (1<<4)
#define GRACKLE_SLEEP (1<<3)
int __openfirmware powerbook_sleep_G3(void)
{
unsigned long save_l2cr;
unsigned long wait;
unsigned short pmcr1;
struct adb_request req;
int ret, timeout;
struct pci_dev *grackle;
grackle = pci_find_slot(0, 0);
if (!grackle)
return -ENODEV;
/* Notify device drivers */
ret = broadcast_sleep(PBOOK_SLEEP_REQUEST, PBOOK_SLEEP_REJECT);
if (ret != PBOOK_SLEEP_OK) {
printk("pmu: sleep rejected\n");
return -EBUSY;
}
/* Sync the disks. */
/* XXX It would be nice to have some way to ensure that
* nobody is dirtying any new buffers while we wait.
* BenH: Moved to _after_ sleep request and changed video
* drivers to vmalloc() during sleep request. This way, all
* vmalloc's are done before actual sleep of block drivers */
fsync_dev(0);
/* Give the disks a little time to actually finish writing */
for (wait = jiffies + (HZ/2); time_before(jiffies, wait); )
mb();
/* Sleep can fail now. May not be very robust but useful for debugging */
ret = broadcast_sleep(PBOOK_SLEEP_NOW, PBOOK_WAKE);
if (ret != PBOOK_SLEEP_OK) {
printk("pmu: sleep failed\n");
return -EBUSY;
}
/* Wait for completion of async backlight requests */
while (!bright_req_1.complete || !bright_req_2.complete ||
!bright_req_3.complete || !batt_req.complete)
pmu_poll();
/* 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);
while (!req.complete)
pmu_poll();
pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
while (!req.complete)
pmu_poll();
/* Disable all interrupts */
pmac_sleep_save_intrs(-1);
/* Make sure the PMU is idle */
while (pmu_state != idle)
pmu_poll();
/* Make sure the decrementer won't interrupt us */
asm volatile("mtdec %0" : : "r" (0x7fffffff));
/* Make sure any pending DEC interrupt occuring while we did
* the above didn't re-enable the DEC */
mb();
asm volatile("mtdec %0" : : "r" (0x7fffffff));
/* Giveup the FPU */
if (current->thread.regs && (current->thread.regs->msr & MSR_FP) != 0)
giveup_fpu(current);
/* We can now disable MSR_EE */
cli();
/* For 750, save backside cache setting and disable it */
save_l2cr = _get_L2CR(); /* (returns 0 if not 750) */
if (save_l2cr)
_set_L2CR(0);
/* Ask the PMU to put us to sleep */
pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
while (!req.complete)
pmu_poll();
/* 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 */
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);
/* 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)
_set_L2CR(save_l2cr);
/* Restore userland MMU context */
set_context(current->active_mm->context, current->active_mm->pgd);
/* Power things up */
pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0xfc);
while (!req.complete)
pmu_poll();
pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
while (!req.complete)
pmu_poll();
pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
while (!req.complete)
pmu_poll();
/* ack all pending interrupts */
timeout = 100000;
interrupt_data[0] = 1;
while (interrupt_data[0] || pmu_state != idle) {
if (--timeout < 0)
break;
if (pmu_state == idle)
adb_int_pending = 1;
via_pmu_interrupt(0, 0, 0);
udelay(10);
}
/* reenable interrupt controller */
pmac_sleep_restore_intrs();
/* Leave some time for HW to settle down */
mdelay(100);
/* Restart jiffies & scheduling */
wakeup_decrementer();
sti();
/* Notify drivers */
broadcast_wake();
return 0;
}
int __openfirmware powerbook_sleep_Core99(void)
{
unsigned long save_l2cr;
unsigned long wait;
struct adb_request req;
int ret, timeout;
if (!can_sleep) {
printk(KERN_ERR "Sleep mode not supported on this machine\n");
return -ENOSYS;
}
/* Notify device drivers */
ret = broadcast_sleep(PBOOK_SLEEP_REQUEST, PBOOK_SLEEP_REJECT);
if (ret != PBOOK_SLEEP_OK) {
printk("pmu: sleep rejected\n");
return -EBUSY;
}
/* Sync the disks. */
/* XXX It would be nice to have some way to ensure that
* nobody is dirtying any new buffers while we wait.
* BenH: Moved to _after_ sleep request and changed video
* drivers to vmalloc() during sleep request. This way, all
* vmalloc's are done before actual sleep of block drivers */
fsync_dev(0);
/* Give the disks a little time to actually finish writing */
for (wait = jiffies + HZ; time_before(jiffies, wait); )
mb();
/* Sleep can fail now. May not be very robust but useful for debugging */
ret = broadcast_sleep(PBOOK_SLEEP_NOW, PBOOK_WAKE);
if (ret != PBOOK_SLEEP_OK) {
printk("pmu: sleep failed\n");
return -EBUSY;
}
/* Wait for completion of async backlight requests */
while (!bright_req_1.complete || !bright_req_2.complete ||
!bright_req_3.complete || !batt_req.complete)
pmu_poll();
/* Tell PMU what events will wake us up */
pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
0xff, 0xff);
while (!req.complete)
pmu_poll();
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));
while (!req.complete)
pmu_poll();
/* Save & disable all interrupts */
openpic_sleep_save_intrs();
/* Make sure the PMU is idle */
while (pmu_state != idle)
pmu_poll();
/* Make sure the decrementer won't interrupt us */
asm volatile("mtdec %0" : : "r" (0x7fffffff));
/* Make sure any pending DEC interrupt occuring while we did
* the above didn't re-enable the DEC */
mb();
asm volatile("mtdec %0" : : "r" (0x7fffffff));
/* Giveup the FPU & vec */
enable_kernel_fp();
#ifdef CONFIG_ALTIVEC
if (cur_cpu_spec[0]->cpu_features & CPU_FTR_ALTIVEC)
enable_kernel_altivec();
#endif /* CONFIG_ALTIVEC */
/* We can now disable MSR_EE */
cli();
/* For 750, save backside cache setting and disable it */
save_l2cr = _get_L2CR(); /* (returns 0 if not 750) */
if (save_l2cr)
_set_L2CR(save_l2cr & 0x7fffffff);
/* Save the state of PCI config space for some slots */
//pbook_pci_save();
if (!__fake_sleep) {
/* Ask the PMU to put us to sleep */
pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
while (!req.complete && pmu_state != idle)
pmu_poll();
}
out_8(&via[B], in_8(&via[B]) | TREQ);
wait_for_ack();
/* 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();
/* Restore PCI config space. This should be overridable by PCI device
* drivers as some of them may need special restore code. That's yet
* another issue that should be handled by the common code properly,
* maybe one day ?
*/
/* Don't restore PCI for now, it crashes. Maybe unnecessary on pbook */
//pbook_pci_restore();
pmu_blink(2);
/* Restore L2 cache */
if (save_l2cr)
_set_L2CR(save_l2cr);
/* Restore userland MMU context */
set_context(current->active_mm->context, current->active_mm->pgd);
/* Tell PMU we are ready */
pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
while (!req.complete)
pmu_poll();
pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0xfc);
while (!req.complete)
pmu_poll();
/* ack all pending interrupts */
timeout = 100000;
interrupt_data[0] = 1;
while (interrupt_data[0] || pmu_state != idle) {
if (--timeout < 0)
break;
if (pmu_state == idle)
adb_int_pending = 1;
via_pmu_interrupt(0, 0, 0);
udelay(10);
}
/* reenable interrupt controller */
openpic_sleep_restore_intrs();
/* Leave some time for HW to settle down */
mdelay(100);
/* Restart jiffies & scheduling */
wakeup_decrementer();
sti();
/* Notify drivers */
broadcast_wake();
return 0;
}
#define PB3400_MEM_CTRL 0xf8000000
#define PB3400_MEM_CTRL_SLEEP 0x70
int __openfirmware powerbook_sleep_3400(void)
{
int ret, i, x;
unsigned int hid0;
unsigned long p, wait;
struct adb_request sleep_req;
char *mem_ctrl;
unsigned int *mem_ctrl_sleep;
/* first map in the memory controller registers */
mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
if (mem_ctrl == NULL) {
printk("powerbook_sleep_3400: ioremap failed\n");
return -ENOMEM;
}
mem_ctrl_sleep = (unsigned int *) (mem_ctrl + PB3400_MEM_CTRL_SLEEP);
/* Notify device drivers */
ret = broadcast_sleep(PBOOK_SLEEP_REQUEST, PBOOK_SLEEP_REJECT);
if (ret != PBOOK_SLEEP_OK) {
printk("pmu: sleep rejected\n");
return -EBUSY;
}
/* Sync the disks. */
/* XXX It would be nice to have some way to ensure that
* nobody is dirtying any new buffers while we wait.
* BenH: Moved to _after_ sleep request and changed video
* drivers to vmalloc() during sleep request. This way, all
* vmalloc's are done before actual sleep of block drivers */
fsync_dev(0);
/* Give the disks a little time to actually finish writing */
for (wait = jiffies + (HZ/4); time_before(jiffies, wait); )
mb();
/* Sleep can fail now. May not be very robust but useful for debugging */
ret = broadcast_sleep(PBOOK_SLEEP_NOW, PBOOK_WAKE);
if (ret != PBOOK_SLEEP_OK) {
printk("pmu: sleep failed\n");
return -EBUSY;
}
/* Wait for completion of async backlight requests */
while (!bright_req_1.complete || !bright_req_2.complete ||
!bright_req_3.complete || !batt_req.complete)
pmu_poll();
/* Disable all interrupts except pmu */
pmac_sleep_save_intrs(vias->intrs[0].line);
/* Make sure the decrementer won't interrupt us */
asm volatile("mtdec %0" : : "r" (0x7fffffff));
/* Make sure any pending DEC interrupt occuring while we did
* the above didn't re-enable the DEC */
mb();
asm volatile("mtdec %0" : : "r" (0x7fffffff));
/* Save the state of PCI config space for some slots */
pbook_pci_save();
/* 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');
while (!sleep_req.complete)
mb();
pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
/* displacement-flush the L2 cache - necessary? */
for (p = KERNELBASE; p < KERNELBASE + 0x100000; p += 0x1000)
i = *(volatile int *)p;
asleep = 1;
/* Put the CPU into sleep mode */
asm volatile("mfspr %0,1008" : "=r" (hid0) :);
hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
asm volatile("mtspr 1008,%0" : : "r" (hid0));
_nmask_and_or_msr(0, MSR_POW | MSR_EE);
udelay(10);
/* OK, we're awake again, start restoring things */
out_be32(mem_ctrl_sleep, 0x3f);
pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
pbook_pci_restore();
/* wait for the PMU interrupt sequence to complete */
while (asleep)
mb();
/* reenable interrupts */
pmac_sleep_restore_intrs();
/* Leave some time for HW to settle down */
mdelay(100);
/* Restart jiffies & scheduling */
wakeup_decrementer();
sti();
/* Notify drivers */
broadcast_wake();
iounmap(mem_ctrl);
return 0;
}
/*
* 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;
};
static LIST_HEAD(all_pmu_pvt);
static spinlock_t all_pvt_lock = SPIN_LOCK_UNLOCKED;
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 __openfirmware 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);
spin_lock_irqsave(&all_pvt_lock, flags);
list_add(&pp->list, &all_pmu_pvt);
spin_unlock_irqrestore(&all_pvt_lock, flags);
file->private_data = pp;
return 0;
}
static ssize_t __openfirmware pmu_read(struct file *file, char *buf,
size_t count, loff_t *ppos)
{
struct pmu_private *pp = file->private_data;
DECLARE_WAITQUEUE(wait, current);
unsigned long flags;
int ret;
if (count < 1 || pp == 0)
return -EINVAL;
ret = verify_area(VERIFY_WRITE, buf, count);
if (ret)
return ret;
spin_lock_irqsave(&pp->lock, flags);
add_wait_queue(&pp->wait, &wait);
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);
}
current->state = TASK_RUNNING;
remove_wait_queue(&pp->wait, &wait);
spin_unlock_irqrestore(&pp->lock, flags);
return ret;
}
static ssize_t __openfirmware pmu_write(struct file *file, const char *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;
lock_kernel();
if (pp != 0) {
file->private_data = 0;
spin_lock_irqsave(&all_pvt_lock, flags);
list_del(&pp->list);
spin_unlock_irqrestore(&all_pvt_lock, flags);
kfree(pp);
}
unlock_kernel();
return 0;
}
/* Note: removed __openfirmware here since it causes link errors */
static int pmu_ioctl(struct inode * inode, struct file *filp,
u_int cmd, u_long arg)
{
int error;
switch (cmd) {
case PMU_IOC_SLEEP:
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
if (sleep_in_progress)
return -EBUSY;
sleep_in_progress = 1;
switch (pmu_kind) {
case PMU_OHARE_BASED:
error = powerbook_sleep_3400();
break;
case PMU_HEATHROW_BASED:
case PMU_PADDINGTON_BASED:
error = powerbook_sleep_G3();
break;
case PMU_KEYLARGO_BASED:
error = powerbook_sleep_Core99();
break;
default:
error = -ENOSYS;
}
sleep_in_progress = 0;
return error;
case PMU_IOC_CAN_SLEEP:
return put_user((u32)can_sleep, (__u32 *)arg);
#ifdef CONFIG_PMAC_BACKLIGHT
/* Backlight should have its own device or go via
* the fbdev
*/
case PMU_IOC_GET_BACKLIGHT:
if (sleep_in_progress)
return -EBUSY;
error = get_backlight_level();
if (error < 0)
return error;
return put_user(error, (__u32 *)arg);
case PMU_IOC_SET_BACKLIGHT:
{
__u32 value;
if (sleep_in_progress)
return -EBUSY;
error = get_user(value, (__u32 *)arg);
if (!error)
error = set_backlight_level(value);
return error;
}
#endif /* CONFIG_PMAC_BACKLIGHT */
case PMU_IOC_GET_MODEL:
return put_user(pmu_kind, (__u32 *)arg);
case PMU_IOC_HAS_ADB:
return put_user(pmu_has_adb, (__u32 *)arg);
}
return -EINVAL;
}
static struct file_operations pmu_device_fops = {
read: pmu_read,
write: pmu_write,
poll: pmu_fpoll,
ioctl: pmu_ioctl,
open: pmu_open,
release: pmu_release,
};
static struct miscdevice pmu_device = {
PMU_MINOR, "pmu", &pmu_device_fops
};
void pmu_device_init(void)
{
if (via)
misc_register(&pmu_device);
}
#endif /* CONFIG_PMAC_PBOOK */
#ifdef DEBUG_SLEEP
static inline void polled_handshake(volatile unsigned char *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 *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 *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 *v = via;
req->complete = 1;
c = req->data[0];
l = pmu_data_len[c][0];
if (l >= 0 && req->nbytes != l + 1)
return -EINVAL;
save_flags(flags); cli();
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);
restore_flags(flags);
return 0;
}
#endif /* DEBUG_SLEEP */
EXPORT_SYMBOL(pmu_request);
EXPORT_SYMBOL(pmu_poll);
EXPORT_SYMBOL(pmu_suspend);
EXPORT_SYMBOL(pmu_resume);
#ifdef CONFIG_PMAC_PBOOK
EXPORT_SYMBOL(pmu_register_sleep_notifier);
EXPORT_SYMBOL(pmu_unregister_sleep_notifier);
EXPORT_SYMBOL(pmu_enable_irled);
EXPORT_SYMBOL(pmu_battery_count);
EXPORT_SYMBOL(pmu_batteries);
EXPORT_SYMBOL(pmu_power_flags);
#endif /* CONFIG_PMAC_PBOOK */
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