Back to home page

OSCL-LXR
 
 

     

0001 // SPDX-License-Identifier: GPL-2.0
0002 /*
0003  * Device driver for the PMU in Apple PowerBooks and PowerMacs.
0004  *
0005  * The VIA (versatile interface adapter) interfaces to the PMU,
0006  * a 6805 microprocessor core whose primary function is to control
0007  * battery charging and system power on the PowerBook 3400 and 2400.
0008  * The PMU also controls the ADB (Apple Desktop Bus) which connects
0009  * to the keyboard and mouse, as well as the non-volatile RAM
0010  * and the RTC (real time clock) chip.
0011  *
0012  * Copyright (C) 1998 Paul Mackerras and Fabio Riccardi.
0013  * Copyright (C) 2001-2002 Benjamin Herrenschmidt
0014  * Copyright (C) 2006-2007 Johannes Berg
0015  *
0016  * THIS DRIVER IS BECOMING A TOTAL MESS !
0017  *  - Cleanup atomically disabling reply to PMU events after
0018  *    a sleep or a freq. switch
0019  *
0020  */
0021 #include <linux/stdarg.h>
0022 #include <linux/mutex.h>
0023 #include <linux/types.h>
0024 #include <linux/errno.h>
0025 #include <linux/kernel.h>
0026 #include <linux/delay.h>
0027 #include <linux/sched/signal.h>
0028 #include <linux/miscdevice.h>
0029 #include <linux/blkdev.h>
0030 #include <linux/pci.h>
0031 #include <linux/slab.h>
0032 #include <linux/poll.h>
0033 #include <linux/adb.h>
0034 #include <linux/pmu.h>
0035 #include <linux/cuda.h>
0036 #include <linux/module.h>
0037 #include <linux/spinlock.h>
0038 #include <linux/pm.h>
0039 #include <linux/proc_fs.h>
0040 #include <linux/seq_file.h>
0041 #include <linux/init.h>
0042 #include <linux/interrupt.h>
0043 #include <linux/device.h>
0044 #include <linux/syscore_ops.h>
0045 #include <linux/freezer.h>
0046 #include <linux/syscalls.h>
0047 #include <linux/suspend.h>
0048 #include <linux/cpu.h>
0049 #include <linux/compat.h>
0050 #include <linux/of_address.h>
0051 #include <linux/of_irq.h>
0052 #include <linux/uaccess.h>
0053 #include <linux/pgtable.h>
0054 #include <asm/machdep.h>
0055 #include <asm/io.h>
0056 #include <asm/sections.h>
0057 #include <asm/irq.h>
0058 #ifdef CONFIG_PPC_PMAC
0059 #include <asm/pmac_feature.h>
0060 #include <asm/pmac_pfunc.h>
0061 #include <asm/pmac_low_i2c.h>
0062 #include <asm/mmu_context.h>
0063 #include <asm/cputable.h>
0064 #include <asm/time.h>
0065 #include <asm/backlight.h>
0066 #else
0067 #include <asm/macintosh.h>
0068 #include <asm/macints.h>
0069 #include <asm/mac_via.h>
0070 #endif
0071 
0072 #include "via-pmu-event.h"
0073 
0074 /* Some compile options */
0075 #undef DEBUG_SLEEP
0076 
0077 /* How many iterations between battery polls */
0078 #define BATTERY_POLLING_COUNT   2
0079 
0080 static DEFINE_MUTEX(pmu_info_proc_mutex);
0081 
0082 /* VIA registers - spaced 0x200 bytes apart */
0083 #define RS      0x200       /* skip between registers */
0084 #define B       0       /* B-side data */
0085 #define A       RS      /* A-side data */
0086 #define DIRB        (2*RS)      /* B-side direction (1=output) */
0087 #define DIRA        (3*RS)      /* A-side direction (1=output) */
0088 #define T1CL        (4*RS)      /* Timer 1 ctr/latch (low 8 bits) */
0089 #define T1CH        (5*RS)      /* Timer 1 counter (high 8 bits) */
0090 #define T1LL        (6*RS)      /* Timer 1 latch (low 8 bits) */
0091 #define T1LH        (7*RS)      /* Timer 1 latch (high 8 bits) */
0092 #define T2CL        (8*RS)      /* Timer 2 ctr/latch (low 8 bits) */
0093 #define T2CH        (9*RS)      /* Timer 2 counter (high 8 bits) */
0094 #define SR      (10*RS)     /* Shift register */
0095 #define ACR     (11*RS)     /* Auxiliary control register */
0096 #define PCR     (12*RS)     /* Peripheral control register */
0097 #define IFR     (13*RS)     /* Interrupt flag register */
0098 #define IER     (14*RS)     /* Interrupt enable register */
0099 #define ANH     (15*RS)     /* A-side data, no handshake */
0100 
0101 /* Bits in B data register: both active low */
0102 #ifdef CONFIG_PPC_PMAC
0103 #define TACK        0x08        /* Transfer acknowledge (input) */
0104 #define TREQ        0x10        /* Transfer request (output) */
0105 #else
0106 #define TACK        0x02
0107 #define TREQ        0x04
0108 #endif
0109 
0110 /* Bits in ACR */
0111 #define SR_CTRL     0x1c        /* Shift register control bits */
0112 #define SR_EXT      0x0c        /* Shift on external clock */
0113 #define SR_OUT      0x10        /* Shift out if 1 */
0114 
0115 /* Bits in IFR and IER */
0116 #define IER_SET     0x80        /* set bits in IER */
0117 #define IER_CLR     0       /* clear bits in IER */
0118 #define SR_INT      0x04        /* Shift register full/empty */
0119 #define CB2_INT     0x08
0120 #define CB1_INT     0x10        /* transition on CB1 input */
0121 
0122 static volatile enum pmu_state {
0123     uninitialized = 0,
0124     idle,
0125     sending,
0126     intack,
0127     reading,
0128     reading_intr,
0129     locked,
0130 } pmu_state;
0131 
0132 static volatile enum int_data_state {
0133     int_data_empty,
0134     int_data_fill,
0135     int_data_ready,
0136     int_data_flush
0137 } int_data_state[2] = { int_data_empty, int_data_empty };
0138 
0139 static struct adb_request *current_req;
0140 static struct adb_request *last_req;
0141 static struct adb_request *req_awaiting_reply;
0142 static unsigned char interrupt_data[2][32];
0143 static int interrupt_data_len[2];
0144 static int int_data_last;
0145 static unsigned char *reply_ptr;
0146 static int data_index;
0147 static int data_len;
0148 static volatile int adb_int_pending;
0149 static volatile int disable_poll;
0150 static int pmu_kind = PMU_UNKNOWN;
0151 static int pmu_fully_inited;
0152 static int pmu_has_adb;
0153 #ifdef CONFIG_PPC_PMAC
0154 static volatile unsigned char __iomem *via1;
0155 static volatile unsigned char __iomem *via2;
0156 static struct device_node *vias;
0157 static struct device_node *gpio_node;
0158 #endif
0159 static unsigned char __iomem *gpio_reg;
0160 static int gpio_irq = 0;
0161 static int gpio_irq_enabled = -1;
0162 static volatile int pmu_suspended;
0163 static DEFINE_SPINLOCK(pmu_lock);
0164 static u8 pmu_intr_mask;
0165 static int pmu_version;
0166 static int drop_interrupts;
0167 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
0168 static int option_lid_wakeup = 1;
0169 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
0170 static unsigned long async_req_locks;
0171 
0172 #define NUM_IRQ_STATS 13
0173 static unsigned int pmu_irq_stats[NUM_IRQ_STATS];
0174 
0175 static struct proc_dir_entry *proc_pmu_root;
0176 static struct proc_dir_entry *proc_pmu_info;
0177 static struct proc_dir_entry *proc_pmu_irqstats;
0178 static struct proc_dir_entry *proc_pmu_options;
0179 static int option_server_mode;
0180 
0181 int pmu_battery_count;
0182 static int pmu_cur_battery;
0183 unsigned int pmu_power_flags = PMU_PWR_AC_PRESENT;
0184 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
0185 static int query_batt_timer = BATTERY_POLLING_COUNT;
0186 static struct adb_request batt_req;
0187 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
0188 
0189 int asleep;
0190 
0191 #ifdef CONFIG_ADB
0192 static int adb_dev_map;
0193 static int pmu_adb_flags;
0194 
0195 static int pmu_probe(void);
0196 static int pmu_init(void);
0197 static int pmu_send_request(struct adb_request *req, int sync);
0198 static int pmu_adb_autopoll(int devs);
0199 static int pmu_adb_reset_bus(void);
0200 #endif /* CONFIG_ADB */
0201 
0202 static int init_pmu(void);
0203 static void pmu_start(void);
0204 static irqreturn_t via_pmu_interrupt(int irq, void *arg);
0205 static irqreturn_t gpio1_interrupt(int irq, void *arg);
0206 static int pmu_info_proc_show(struct seq_file *m, void *v);
0207 static int pmu_irqstats_proc_show(struct seq_file *m, void *v);
0208 static int pmu_battery_proc_show(struct seq_file *m, void *v);
0209 static void pmu_pass_intr(unsigned char *data, int len);
0210 static const struct proc_ops pmu_options_proc_ops;
0211 
0212 #ifdef CONFIG_ADB
0213 const struct adb_driver via_pmu_driver = {
0214     .name         = "PMU",
0215     .probe        = pmu_probe,
0216     .init         = pmu_init,
0217     .send_request = pmu_send_request,
0218     .autopoll     = pmu_adb_autopoll,
0219     .poll         = pmu_poll_adb,
0220     .reset_bus    = pmu_adb_reset_bus,
0221 };
0222 #endif /* CONFIG_ADB */
0223 
0224 extern void low_sleep_handler(void);
0225 extern void enable_kernel_altivec(void);
0226 extern void enable_kernel_fp(void);
0227 
0228 #ifdef DEBUG_SLEEP
0229 int pmu_polled_request(struct adb_request *req);
0230 void pmu_blink(int n);
0231 #endif
0232 
0233 /*
0234  * This table indicates for each PMU opcode:
0235  * - the number of data bytes to be sent with the command, or -1
0236  *   if a length byte should be sent,
0237  * - the number of response bytes which the PMU will return, or
0238  *   -1 if it will send a length byte.
0239  */
0240 static const s8 pmu_data_len[256][2] = {
0241 /*     0       1       2       3       4       5       6       7  */
0242 /*00*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
0243 /*08*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
0244 /*10*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
0245 /*18*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
0246 /*20*/  {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
0247 /*28*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
0248 /*30*/  { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
0249 /*38*/  { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
0250 /*40*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
0251 /*48*/  { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
0252 /*50*/  { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
0253 /*58*/  { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
0254 /*60*/  { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
0255 /*68*/  { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
0256 /*70*/  { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
0257 /*78*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
0258 /*80*/  { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
0259 /*88*/  { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
0260 /*90*/  { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
0261 /*98*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
0262 /*a0*/  { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
0263 /*a8*/  { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
0264 /*b0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
0265 /*b8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
0266 /*c0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
0267 /*c8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
0268 /*d0*/  { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
0269 /*d8*/  { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
0270 /*e0*/  {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
0271 /*e8*/  { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
0272 /*f0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
0273 /*f8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
0274 };
0275 
0276 static char *pbook_type[] = {
0277     "Unknown PowerBook",
0278     "PowerBook 2400/3400/3500(G3)",
0279     "PowerBook G3 Series",
0280     "1999 PowerBook G3",
0281     "Core99"
0282 };
0283 
0284 int __init find_via_pmu(void)
0285 {
0286 #ifdef CONFIG_PPC_PMAC
0287     u64 taddr;
0288     const u32 *reg;
0289 
0290     if (pmu_state != uninitialized)
0291         return 1;
0292     vias = of_find_node_by_name(NULL, "via-pmu");
0293     if (vias == NULL)
0294         return 0;
0295 
0296     reg = of_get_property(vias, "reg", NULL);
0297     if (reg == NULL) {
0298         printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
0299         goto fail;
0300     }
0301     taddr = of_translate_address(vias, reg);
0302     if (taddr == OF_BAD_ADDR) {
0303         printk(KERN_ERR "via-pmu: Can't translate address !\n");
0304         goto fail;
0305     }
0306 
0307     pmu_has_adb = 1;
0308 
0309     pmu_intr_mask = PMU_INT_PCEJECT |
0310             PMU_INT_SNDBRT |
0311             PMU_INT_ADB |
0312             PMU_INT_TICK;
0313     
0314     if (of_node_name_eq(vias->parent, "ohare") ||
0315         of_device_is_compatible(vias->parent, "ohare"))
0316         pmu_kind = PMU_OHARE_BASED;
0317     else if (of_device_is_compatible(vias->parent, "paddington"))
0318         pmu_kind = PMU_PADDINGTON_BASED;
0319     else if (of_device_is_compatible(vias->parent, "heathrow"))
0320         pmu_kind = PMU_HEATHROW_BASED;
0321     else if (of_device_is_compatible(vias->parent, "Keylargo")
0322          || of_device_is_compatible(vias->parent, "K2-Keylargo")) {
0323         struct device_node *gpiop;
0324         struct device_node *adbp;
0325         u64 gaddr = OF_BAD_ADDR;
0326 
0327         pmu_kind = PMU_KEYLARGO_BASED;
0328         adbp = of_find_node_by_type(NULL, "adb");
0329         pmu_has_adb = (adbp != NULL);
0330         of_node_put(adbp);
0331         pmu_intr_mask = PMU_INT_PCEJECT |
0332                 PMU_INT_SNDBRT |
0333                 PMU_INT_ADB |
0334                 PMU_INT_TICK |
0335                 PMU_INT_ENVIRONMENT;
0336         
0337         gpiop = of_find_node_by_name(NULL, "gpio");
0338         if (gpiop) {
0339             reg = of_get_property(gpiop, "reg", NULL);
0340             if (reg)
0341                 gaddr = of_translate_address(gpiop, reg);
0342             if (gaddr != OF_BAD_ADDR)
0343                 gpio_reg = ioremap(gaddr, 0x10);
0344             of_node_put(gpiop);
0345         }
0346         if (gpio_reg == NULL) {
0347             printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
0348             goto fail;
0349         }
0350     } else
0351         pmu_kind = PMU_UNKNOWN;
0352 
0353     via1 = via2 = ioremap(taddr, 0x2000);
0354     if (via1 == NULL) {
0355         printk(KERN_ERR "via-pmu: Can't map address !\n");
0356         goto fail_via_remap;
0357     }
0358     
0359     out_8(&via1[IER], IER_CLR | 0x7f);  /* disable all intrs */
0360     out_8(&via1[IFR], 0x7f);            /* clear IFR */
0361 
0362     pmu_state = idle;
0363 
0364     if (!init_pmu())
0365         goto fail_init;
0366 
0367     sys_ctrler = SYS_CTRLER_PMU;
0368     
0369     return 1;
0370 
0371  fail_init:
0372     iounmap(via1);
0373     via1 = via2 = NULL;
0374  fail_via_remap:
0375     iounmap(gpio_reg);
0376     gpio_reg = NULL;
0377  fail:
0378     of_node_put(vias);
0379     vias = NULL;
0380     pmu_state = uninitialized;
0381     return 0;
0382 #else
0383     if (macintosh_config->adb_type != MAC_ADB_PB2)
0384         return 0;
0385 
0386     pmu_kind = PMU_UNKNOWN;
0387 
0388     pmu_has_adb = 1;
0389 
0390     pmu_intr_mask = PMU_INT_PCEJECT |
0391             PMU_INT_SNDBRT |
0392             PMU_INT_ADB |
0393             PMU_INT_TICK;
0394 
0395     pmu_state = idle;
0396 
0397     if (!init_pmu()) {
0398         pmu_state = uninitialized;
0399         return 0;
0400     }
0401 
0402     return 1;
0403 #endif /* !CONFIG_PPC_PMAC */
0404 }
0405 
0406 #ifdef CONFIG_ADB
0407 static int pmu_probe(void)
0408 {
0409     return pmu_state == uninitialized ? -ENODEV : 0;
0410 }
0411 
0412 static int pmu_init(void)
0413 {
0414     return pmu_state == uninitialized ? -ENODEV : 0;
0415 }
0416 #endif /* CONFIG_ADB */
0417 
0418 /*
0419  * We can't wait until pmu_init gets called, that happens too late.
0420  * It happens after IDE and SCSI initialization, which can take a few
0421  * seconds, and by that time the PMU could have given up on us and
0422  * turned us off.
0423  * Thus this is called with arch_initcall rather than device_initcall.
0424  */
0425 static int __init via_pmu_start(void)
0426 {
0427     unsigned int __maybe_unused irq;
0428 
0429     if (pmu_state == uninitialized)
0430         return -ENODEV;
0431 
0432     batt_req.complete = 1;
0433 
0434 #ifdef CONFIG_PPC_PMAC
0435     irq = irq_of_parse_and_map(vias, 0);
0436     if (!irq) {
0437         printk(KERN_ERR "via-pmu: can't map interrupt\n");
0438         return -ENODEV;
0439     }
0440     /* We set IRQF_NO_SUSPEND because we don't want the interrupt
0441      * to be disabled between the 2 passes of driver suspend, we
0442      * control our own disabling for that one
0443      */
0444     if (request_irq(irq, via_pmu_interrupt, IRQF_NO_SUSPEND,
0445             "VIA-PMU", (void *)0)) {
0446         printk(KERN_ERR "via-pmu: can't request irq %d\n", irq);
0447         return -ENODEV;
0448     }
0449 
0450     if (pmu_kind == PMU_KEYLARGO_BASED) {
0451         gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
0452         if (gpio_node == NULL)
0453             gpio_node = of_find_node_by_name(NULL,
0454                              "pmu-interrupt");
0455         if (gpio_node)
0456             gpio_irq = irq_of_parse_and_map(gpio_node, 0);
0457 
0458         if (gpio_irq) {
0459             if (request_irq(gpio_irq, gpio1_interrupt,
0460                     IRQF_NO_SUSPEND, "GPIO1 ADB",
0461                     (void *)0))
0462                 printk(KERN_ERR "pmu: can't get irq %d"
0463                        " (GPIO1)\n", gpio_irq);
0464             else
0465                 gpio_irq_enabled = 1;
0466         }
0467     }
0468 
0469     /* Enable interrupts */
0470     out_8(&via1[IER], IER_SET | SR_INT | CB1_INT);
0471 #else
0472     if (request_irq(IRQ_MAC_ADB_SR, via_pmu_interrupt, IRQF_NO_SUSPEND,
0473             "VIA-PMU-SR", NULL)) {
0474         pr_err("%s: couldn't get SR irq\n", __func__);
0475         return -ENODEV;
0476     }
0477     if (request_irq(IRQ_MAC_ADB_CL, via_pmu_interrupt, IRQF_NO_SUSPEND,
0478             "VIA-PMU-CL", NULL)) {
0479         pr_err("%s: couldn't get CL irq\n", __func__);
0480         free_irq(IRQ_MAC_ADB_SR, NULL);
0481         return -ENODEV;
0482     }
0483 #endif /* !CONFIG_PPC_PMAC */
0484 
0485     pmu_fully_inited = 1;
0486 
0487     /* Make sure PMU settle down before continuing. This is _very_ important
0488      * since the IDE probe may shut interrupts down for quite a bit of time. If
0489      * a PMU communication is pending while this happens, the PMU may timeout
0490      * Not that on Core99 machines, the PMU keeps sending us environement
0491      * messages, we should find a way to either fix IDE or make it call
0492      * pmu_suspend() before masking interrupts. This can also happens while
0493      * scolling with some fbdevs.
0494      */
0495     do {
0496         pmu_poll();
0497     } while (pmu_state != idle);
0498 
0499     return 0;
0500 }
0501 
0502 arch_initcall(via_pmu_start);
0503 
0504 /*
0505  * This has to be done after pci_init, which is a subsys_initcall.
0506  */
0507 static int __init via_pmu_dev_init(void)
0508 {
0509     if (pmu_state == uninitialized)
0510         return -ENODEV;
0511 
0512 #ifdef CONFIG_PMAC_BACKLIGHT
0513     /* Initialize backlight */
0514     pmu_backlight_init();
0515 #endif
0516 
0517 #ifdef CONFIG_PPC32
0518     if (of_machine_is_compatible("AAPL,3400/2400") ||
0519         of_machine_is_compatible("AAPL,3500")) {
0520         int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
0521             NULL, PMAC_MB_INFO_MODEL, 0);
0522         pmu_battery_count = 1;
0523         if (mb == PMAC_TYPE_COMET)
0524             pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
0525         else
0526             pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
0527     } else if (of_machine_is_compatible("AAPL,PowerBook1998") ||
0528         of_machine_is_compatible("PowerBook1,1")) {
0529         pmu_battery_count = 2;
0530         pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
0531         pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
0532     } else {
0533         struct device_node* prim =
0534             of_find_node_by_name(NULL, "power-mgt");
0535         const u32 *prim_info = NULL;
0536         if (prim)
0537             prim_info = of_get_property(prim, "prim-info", NULL);
0538         if (prim_info) {
0539             /* Other stuffs here yet unknown */
0540             pmu_battery_count = (prim_info[6] >> 16) & 0xff;
0541             pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
0542             if (pmu_battery_count > 1)
0543                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
0544         }
0545         of_node_put(prim);
0546     }
0547 #endif /* CONFIG_PPC32 */
0548 
0549     /* Create /proc/pmu */
0550     proc_pmu_root = proc_mkdir("pmu", NULL);
0551     if (proc_pmu_root) {
0552         long i;
0553 
0554         for (i=0; i<pmu_battery_count; i++) {
0555             char title[16];
0556             sprintf(title, "battery_%ld", i);
0557             proc_pmu_batt[i] = proc_create_single_data(title, 0,
0558                     proc_pmu_root, pmu_battery_proc_show,
0559                     (void *)i);
0560         }
0561 
0562         proc_pmu_info = proc_create_single("info", 0, proc_pmu_root,
0563                 pmu_info_proc_show);
0564         proc_pmu_irqstats = proc_create_single("interrupts", 0,
0565                 proc_pmu_root, pmu_irqstats_proc_show);
0566         proc_pmu_options = proc_create("options", 0600, proc_pmu_root,
0567                         &pmu_options_proc_ops);
0568     }
0569     return 0;
0570 }
0571 
0572 device_initcall(via_pmu_dev_init);
0573 
0574 static int
0575 init_pmu(void)
0576 {
0577     int timeout;
0578     struct adb_request req;
0579 
0580     /* Negate TREQ. Set TACK to input and TREQ to output. */
0581     out_8(&via2[B], in_8(&via2[B]) | TREQ);
0582     out_8(&via2[DIRB], (in_8(&via2[DIRB]) | TREQ) & ~TACK);
0583 
0584     pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
0585     timeout =  100000;
0586     while (!req.complete) {
0587         if (--timeout < 0) {
0588             printk(KERN_ERR "init_pmu: no response from PMU\n");
0589             return 0;
0590         }
0591         udelay(10);
0592         pmu_poll();
0593     }
0594 
0595     /* ack all pending interrupts */
0596     timeout = 100000;
0597     interrupt_data[0][0] = 1;
0598     while (interrupt_data[0][0] || pmu_state != idle) {
0599         if (--timeout < 0) {
0600             printk(KERN_ERR "init_pmu: timed out acking intrs\n");
0601             return 0;
0602         }
0603         if (pmu_state == idle)
0604             adb_int_pending = 1;
0605         via_pmu_interrupt(0, NULL);
0606         udelay(10);
0607     }
0608 
0609     /* Tell PMU we are ready.  */
0610     if (pmu_kind == PMU_KEYLARGO_BASED) {
0611         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
0612         while (!req.complete)
0613             pmu_poll();
0614     }
0615 
0616     /* Read PMU version */
0617     pmu_request(&req, NULL, 1, PMU_GET_VERSION);
0618     pmu_wait_complete(&req);
0619     if (req.reply_len > 0)
0620         pmu_version = req.reply[0];
0621     
0622     /* Read server mode setting */
0623     if (pmu_kind == PMU_KEYLARGO_BASED) {
0624         pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
0625                 PMU_PWR_GET_POWERUP_EVENTS);
0626         pmu_wait_complete(&req);
0627         if (req.reply_len == 2) {
0628             if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
0629                 option_server_mode = 1;
0630             printk(KERN_INFO "via-pmu: Server Mode is %s\n",
0631                    option_server_mode ? "enabled" : "disabled");
0632         }
0633     }
0634 
0635     printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
0636            PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
0637 
0638     return 1;
0639 }
0640 
0641 int
0642 pmu_get_model(void)
0643 {
0644     return pmu_kind;
0645 }
0646 
0647 static void pmu_set_server_mode(int server_mode)
0648 {
0649     struct adb_request req;
0650 
0651     if (pmu_kind != PMU_KEYLARGO_BASED)
0652         return;
0653 
0654     option_server_mode = server_mode;
0655     pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
0656     pmu_wait_complete(&req);
0657     if (req.reply_len < 2)
0658         return;
0659     if (server_mode)
0660         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
0661                 PMU_PWR_SET_POWERUP_EVENTS,
0662                 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT); 
0663     else
0664         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
0665                 PMU_PWR_CLR_POWERUP_EVENTS,
0666                 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT); 
0667     pmu_wait_complete(&req);
0668 }
0669 
0670 /* This new version of the code for 2400/3400/3500 powerbooks
0671  * is inspired from the implementation in gkrellm-pmu
0672  */
0673 static void
0674 done_battery_state_ohare(struct adb_request* req)
0675 {
0676 #ifdef CONFIG_PPC_PMAC
0677     /* format:
0678      *  [0]    :  flags
0679      *    0x01 :  AC indicator
0680      *    0x02 :  charging
0681      *    0x04 :  battery exist
0682      *    0x08 :  
0683      *    0x10 :  
0684      *    0x20 :  full charged
0685      *    0x40 :  pcharge reset
0686      *    0x80 :  battery exist
0687      *
0688      *  [1][2] :  battery voltage
0689      *  [3]    :  CPU temperature
0690      *  [4]    :  battery temperature
0691      *  [5]    :  current
0692      *  [6][7] :  pcharge
0693      *              --tkoba
0694      */
0695     unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
0696     long pcharge, charge, vb, vmax, lmax;
0697     long vmax_charging, vmax_charged;
0698     long amperage, voltage, time, max;
0699     int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
0700             NULL, PMAC_MB_INFO_MODEL, 0);
0701 
0702     if (req->reply[0] & 0x01)
0703         pmu_power_flags |= PMU_PWR_AC_PRESENT;
0704     else
0705         pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
0706     
0707     if (mb == PMAC_TYPE_COMET) {
0708         vmax_charged = 189;
0709         vmax_charging = 213;
0710         lmax = 6500;
0711     } else {
0712         vmax_charged = 330;
0713         vmax_charging = 330;
0714         lmax = 6500;
0715     }
0716     vmax = vmax_charged;
0717 
0718     /* If battery installed */
0719     if (req->reply[0] & 0x04) {
0720         bat_flags |= PMU_BATT_PRESENT;
0721         if (req->reply[0] & 0x02)
0722             bat_flags |= PMU_BATT_CHARGING;
0723         vb = (req->reply[1] << 8) | req->reply[2];
0724         voltage = (vb * 265 + 72665) / 10;
0725         amperage = req->reply[5];
0726         if ((req->reply[0] & 0x01) == 0) {
0727             if (amperage > 200)
0728                 vb += ((amperage - 200) * 15)/100;
0729         } else if (req->reply[0] & 0x02) {
0730             vb = (vb * 97) / 100;
0731             vmax = vmax_charging;
0732         }
0733         charge = (100 * vb) / vmax;
0734         if (req->reply[0] & 0x40) {
0735             pcharge = (req->reply[6] << 8) + req->reply[7];
0736             if (pcharge > lmax)
0737                 pcharge = lmax;
0738             pcharge *= 100;
0739             pcharge = 100 - pcharge / lmax;
0740             if (pcharge < charge)
0741                 charge = pcharge;
0742         }
0743         if (amperage > 0)
0744             time = (charge * 16440) / amperage;
0745         else
0746             time = 0;
0747         max = 100;
0748         amperage = -amperage;
0749     } else
0750         charge = max = amperage = voltage = time = 0;
0751 
0752     pmu_batteries[pmu_cur_battery].flags = bat_flags;
0753     pmu_batteries[pmu_cur_battery].charge = charge;
0754     pmu_batteries[pmu_cur_battery].max_charge = max;
0755     pmu_batteries[pmu_cur_battery].amperage = amperage;
0756     pmu_batteries[pmu_cur_battery].voltage = voltage;
0757     pmu_batteries[pmu_cur_battery].time_remaining = time;
0758 #endif /* CONFIG_PPC_PMAC */
0759 
0760     clear_bit(0, &async_req_locks);
0761 }
0762 
0763 static void
0764 done_battery_state_smart(struct adb_request* req)
0765 {
0766     /* format:
0767      *  [0] : format of this structure (known: 3,4,5)
0768      *  [1] : flags
0769      *  
0770      *  format 3 & 4:
0771      *  
0772      *  [2] : charge
0773      *  [3] : max charge
0774      *  [4] : current
0775      *  [5] : voltage
0776      *  
0777      *  format 5:
0778      *  
0779      *  [2][3] : charge
0780      *  [4][5] : max charge
0781      *  [6][7] : current
0782      *  [8][9] : voltage
0783      */
0784      
0785     unsigned int bat_flags = PMU_BATT_TYPE_SMART;
0786     int amperage;
0787     unsigned int capa, max, voltage;
0788     
0789     if (req->reply[1] & 0x01)
0790         pmu_power_flags |= PMU_PWR_AC_PRESENT;
0791     else
0792         pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
0793 
0794 
0795     capa = max = amperage = voltage = 0;
0796     
0797     if (req->reply[1] & 0x04) {
0798         bat_flags |= PMU_BATT_PRESENT;
0799         switch(req->reply[0]) {
0800             case 3:
0801             case 4: capa = req->reply[2];
0802                 max = req->reply[3];
0803                 amperage = *((signed char *)&req->reply[4]);
0804                 voltage = req->reply[5];
0805                 break;
0806             case 5: capa = (req->reply[2] << 8) | req->reply[3];
0807                 max = (req->reply[4] << 8) | req->reply[5];
0808                 amperage = *((signed short *)&req->reply[6]);
0809                 voltage = (req->reply[8] << 8) | req->reply[9];
0810                 break;
0811             default:
0812                 pr_warn("pmu.c: unrecognized battery info, "
0813                     "len: %d, %4ph\n", req->reply_len,
0814                                req->reply);
0815                 break;
0816         }
0817     }
0818 
0819     if ((req->reply[1] & 0x01) && (amperage > 0))
0820         bat_flags |= PMU_BATT_CHARGING;
0821 
0822     pmu_batteries[pmu_cur_battery].flags = bat_flags;
0823     pmu_batteries[pmu_cur_battery].charge = capa;
0824     pmu_batteries[pmu_cur_battery].max_charge = max;
0825     pmu_batteries[pmu_cur_battery].amperage = amperage;
0826     pmu_batteries[pmu_cur_battery].voltage = voltage;
0827     if (amperage) {
0828         if ((req->reply[1] & 0x01) && (amperage > 0))
0829             pmu_batteries[pmu_cur_battery].time_remaining
0830                 = ((max-capa) * 3600) / amperage;
0831         else
0832             pmu_batteries[pmu_cur_battery].time_remaining
0833                 = (capa * 3600) / (-amperage);
0834     } else
0835         pmu_batteries[pmu_cur_battery].time_remaining = 0;
0836 
0837     pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
0838 
0839     clear_bit(0, &async_req_locks);
0840 }
0841 
0842 static void
0843 query_battery_state(void)
0844 {
0845     if (test_and_set_bit(0, &async_req_locks))
0846         return;
0847     if (pmu_kind == PMU_OHARE_BASED)
0848         pmu_request(&batt_req, done_battery_state_ohare,
0849             1, PMU_BATTERY_STATE);
0850     else
0851         pmu_request(&batt_req, done_battery_state_smart,
0852             2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
0853 }
0854 
0855 static int pmu_info_proc_show(struct seq_file *m, void *v)
0856 {
0857     seq_printf(m, "PMU driver version     : %d\n", PMU_DRIVER_VERSION);
0858     seq_printf(m, "PMU firmware version   : %02x\n", pmu_version);
0859     seq_printf(m, "AC Power               : %d\n",
0860         ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
0861     seq_printf(m, "Battery count          : %d\n", pmu_battery_count);
0862 
0863     return 0;
0864 }
0865 
0866 static int pmu_irqstats_proc_show(struct seq_file *m, void *v)
0867 {
0868     int i;
0869     static const char *irq_names[NUM_IRQ_STATS] = {
0870         "Unknown interrupt (type 0)",
0871         "Unknown interrupt (type 1)",
0872         "PC-Card eject button",
0873         "Sound/Brightness button",
0874         "ADB message",
0875         "Battery state change",
0876         "Environment interrupt",
0877         "Tick timer",
0878         "Ghost interrupt (zero len)",
0879         "Empty interrupt (empty mask)",
0880         "Max irqs in a row",
0881         "Total CB1 triggered events",
0882         "Total GPIO1 triggered events",
0883         };
0884 
0885     for (i = 0; i < NUM_IRQ_STATS; i++) {
0886         seq_printf(m, " %2u: %10u (%s)\n",
0887                  i, pmu_irq_stats[i], irq_names[i]);
0888     }
0889     return 0;
0890 }
0891 
0892 static int pmu_battery_proc_show(struct seq_file *m, void *v)
0893 {
0894     long batnum = (long)m->private;
0895     
0896     seq_putc(m, '\n');
0897     seq_printf(m, "flags      : %08x\n", pmu_batteries[batnum].flags);
0898     seq_printf(m, "charge     : %d\n", pmu_batteries[batnum].charge);
0899     seq_printf(m, "max_charge : %d\n", pmu_batteries[batnum].max_charge);
0900     seq_printf(m, "current    : %d\n", pmu_batteries[batnum].amperage);
0901     seq_printf(m, "voltage    : %d\n", pmu_batteries[batnum].voltage);
0902     seq_printf(m, "time rem.  : %d\n", pmu_batteries[batnum].time_remaining);
0903     return 0;
0904 }
0905 
0906 static int pmu_options_proc_show(struct seq_file *m, void *v)
0907 {
0908 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
0909     if (pmu_kind == PMU_KEYLARGO_BASED &&
0910         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
0911         seq_printf(m, "lid_wakeup=%d\n", option_lid_wakeup);
0912 #endif
0913     if (pmu_kind == PMU_KEYLARGO_BASED)
0914         seq_printf(m, "server_mode=%d\n", option_server_mode);
0915 
0916     return 0;
0917 }
0918 
0919 static int pmu_options_proc_open(struct inode *inode, struct file *file)
0920 {
0921     return single_open(file, pmu_options_proc_show, NULL);
0922 }
0923 
0924 static ssize_t pmu_options_proc_write(struct file *file,
0925         const char __user *buffer, size_t count, loff_t *pos)
0926 {
0927     char tmp[33];
0928     char *label, *val;
0929     size_t fcount = count;
0930     
0931     if (!count)
0932         return -EINVAL;
0933     if (count > 32)
0934         count = 32;
0935     if (copy_from_user(tmp, buffer, count))
0936         return -EFAULT;
0937     tmp[count] = 0;
0938 
0939     label = tmp;
0940     while(*label == ' ')
0941         label++;
0942     val = label;
0943     while(*val && (*val != '=')) {
0944         if (*val == ' ')
0945             *val = 0;
0946         val++;
0947     }
0948     if ((*val) == 0)
0949         return -EINVAL;
0950     *(val++) = 0;
0951     while(*val == ' ')
0952         val++;
0953 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
0954     if (pmu_kind == PMU_KEYLARGO_BASED &&
0955         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
0956         if (!strcmp(label, "lid_wakeup"))
0957             option_lid_wakeup = ((*val) == '1');
0958 #endif
0959     if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
0960         int new_value;
0961         new_value = ((*val) == '1');
0962         if (new_value != option_server_mode)
0963             pmu_set_server_mode(new_value);
0964     }
0965     return fcount;
0966 }
0967 
0968 static const struct proc_ops pmu_options_proc_ops = {
0969     .proc_open  = pmu_options_proc_open,
0970     .proc_read  = seq_read,
0971     .proc_lseek = seq_lseek,
0972     .proc_release   = single_release,
0973     .proc_write = pmu_options_proc_write,
0974 };
0975 
0976 #ifdef CONFIG_ADB
0977 /* Send an ADB command */
0978 static int pmu_send_request(struct adb_request *req, int sync)
0979 {
0980     int i, ret;
0981 
0982     if (pmu_state == uninitialized || !pmu_fully_inited) {
0983         req->complete = 1;
0984         return -ENXIO;
0985     }
0986 
0987     ret = -EINVAL;
0988 
0989     switch (req->data[0]) {
0990     case PMU_PACKET:
0991         for (i = 0; i < req->nbytes - 1; ++i)
0992             req->data[i] = req->data[i+1];
0993         --req->nbytes;
0994         if (pmu_data_len[req->data[0]][1] != 0) {
0995             req->reply[0] = ADB_RET_OK;
0996             req->reply_len = 1;
0997         } else
0998             req->reply_len = 0;
0999         ret = pmu_queue_request(req);
1000         break;
1001     case CUDA_PACKET:
1002         switch (req->data[1]) {
1003         case CUDA_GET_TIME:
1004             if (req->nbytes != 2)
1005                 break;
1006             req->data[0] = PMU_READ_RTC;
1007             req->nbytes = 1;
1008             req->reply_len = 3;
1009             req->reply[0] = CUDA_PACKET;
1010             req->reply[1] = 0;
1011             req->reply[2] = CUDA_GET_TIME;
1012             ret = pmu_queue_request(req);
1013             break;
1014         case CUDA_SET_TIME:
1015             if (req->nbytes != 6)
1016                 break;
1017             req->data[0] = PMU_SET_RTC;
1018             req->nbytes = 5;
1019             for (i = 1; i <= 4; ++i)
1020                 req->data[i] = req->data[i+1];
1021             req->reply_len = 3;
1022             req->reply[0] = CUDA_PACKET;
1023             req->reply[1] = 0;
1024             req->reply[2] = CUDA_SET_TIME;
1025             ret = pmu_queue_request(req);
1026             break;
1027         }
1028         break;
1029     case ADB_PACKET:
1030             if (!pmu_has_adb)
1031                 return -ENXIO;
1032         for (i = req->nbytes - 1; i > 1; --i)
1033             req->data[i+2] = req->data[i];
1034         req->data[3] = req->nbytes - 2;
1035         req->data[2] = pmu_adb_flags;
1036         /*req->data[1] = req->data[1];*/
1037         req->data[0] = PMU_ADB_CMD;
1038         req->nbytes += 2;
1039         req->reply_expected = 1;
1040         req->reply_len = 0;
1041         ret = pmu_queue_request(req);
1042         break;
1043     }
1044     if (ret) {
1045         req->complete = 1;
1046         return ret;
1047     }
1048 
1049     if (sync)
1050         while (!req->complete)
1051             pmu_poll();
1052 
1053     return 0;
1054 }
1055 
1056 /* Enable/disable autopolling */
1057 static int __pmu_adb_autopoll(int devs)
1058 {
1059     struct adb_request req;
1060 
1061     if (devs) {
1062         pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1063                 adb_dev_map >> 8, adb_dev_map);
1064         pmu_adb_flags = 2;
1065     } else {
1066         pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1067         pmu_adb_flags = 0;
1068     }
1069     while (!req.complete)
1070         pmu_poll();
1071     return 0;
1072 }
1073 
1074 static int pmu_adb_autopoll(int devs)
1075 {
1076     if (pmu_state == uninitialized || !pmu_fully_inited || !pmu_has_adb)
1077         return -ENXIO;
1078 
1079     adb_dev_map = devs;
1080     return __pmu_adb_autopoll(devs);
1081 }
1082 
1083 /* Reset the ADB bus */
1084 static int pmu_adb_reset_bus(void)
1085 {
1086     struct adb_request req;
1087     int save_autopoll = adb_dev_map;
1088 
1089     if (pmu_state == uninitialized || !pmu_fully_inited || !pmu_has_adb)
1090         return -ENXIO;
1091 
1092     /* anyone got a better idea?? */
1093     __pmu_adb_autopoll(0);
1094 
1095     req.nbytes = 4;
1096     req.done = NULL;
1097     req.data[0] = PMU_ADB_CMD;
1098     req.data[1] = ADB_BUSRESET;
1099     req.data[2] = 0;
1100     req.data[3] = 0;
1101     req.data[4] = 0;
1102     req.reply_len = 0;
1103     req.reply_expected = 1;
1104     if (pmu_queue_request(&req) != 0) {
1105         printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1106         return -EIO;
1107     }
1108     pmu_wait_complete(&req);
1109 
1110     if (save_autopoll != 0)
1111         __pmu_adb_autopoll(save_autopoll);
1112 
1113     return 0;
1114 }
1115 #endif /* CONFIG_ADB */
1116 
1117 /* Construct and send a pmu request */
1118 int
1119 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1120         int nbytes, ...)
1121 {
1122     va_list list;
1123     int i;
1124 
1125     if (pmu_state == uninitialized)
1126         return -ENXIO;
1127 
1128     if (nbytes < 0 || nbytes > 32) {
1129         printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1130         req->complete = 1;
1131         return -EINVAL;
1132     }
1133     req->nbytes = nbytes;
1134     req->done = done;
1135     va_start(list, nbytes);
1136     for (i = 0; i < nbytes; ++i)
1137         req->data[i] = va_arg(list, int);
1138     va_end(list);
1139     req->reply_len = 0;
1140     req->reply_expected = 0;
1141     return pmu_queue_request(req);
1142 }
1143 
1144 int
1145 pmu_queue_request(struct adb_request *req)
1146 {
1147     unsigned long flags;
1148     int nsend;
1149 
1150     if (pmu_state == uninitialized) {
1151         req->complete = 1;
1152         return -ENXIO;
1153     }
1154     if (req->nbytes <= 0) {
1155         req->complete = 1;
1156         return 0;
1157     }
1158     nsend = pmu_data_len[req->data[0]][0];
1159     if (nsend >= 0 && req->nbytes != nsend + 1) {
1160         req->complete = 1;
1161         return -EINVAL;
1162     }
1163 
1164     req->next = NULL;
1165     req->sent = 0;
1166     req->complete = 0;
1167 
1168     spin_lock_irqsave(&pmu_lock, flags);
1169     if (current_req) {
1170         last_req->next = req;
1171         last_req = req;
1172     } else {
1173         current_req = req;
1174         last_req = req;
1175         if (pmu_state == idle)
1176             pmu_start();
1177     }
1178     spin_unlock_irqrestore(&pmu_lock, flags);
1179 
1180     return 0;
1181 }
1182 
1183 static inline void
1184 wait_for_ack(void)
1185 {
1186     /* Sightly increased the delay, I had one occurrence of the message
1187      * reported
1188      */
1189     int timeout = 4000;
1190     while ((in_8(&via2[B]) & TACK) == 0) {
1191         if (--timeout < 0) {
1192             printk(KERN_ERR "PMU not responding (!ack)\n");
1193             return;
1194         }
1195         udelay(10);
1196     }
1197 }
1198 
1199 /* New PMU seems to be very sensitive to those timings, so we make sure
1200  * PCI is flushed immediately */
1201 static inline void
1202 send_byte(int x)
1203 {
1204     out_8(&via1[ACR], in_8(&via1[ACR]) | SR_OUT | SR_EXT);
1205     out_8(&via1[SR], x);
1206     out_8(&via2[B], in_8(&via2[B]) & ~TREQ);    /* assert TREQ */
1207     (void)in_8(&via2[B]);
1208 }
1209 
1210 static inline void
1211 recv_byte(void)
1212 {
1213     out_8(&via1[ACR], (in_8(&via1[ACR]) & ~SR_OUT) | SR_EXT);
1214     in_8(&via1[SR]);        /* resets SR */
1215     out_8(&via2[B], in_8(&via2[B]) & ~TREQ);
1216     (void)in_8(&via2[B]);
1217 }
1218 
1219 static inline void
1220 pmu_done(struct adb_request *req)
1221 {
1222     void (*done)(struct adb_request *) = req->done;
1223     mb();
1224     req->complete = 1;
1225         /* Here, we assume that if the request has a done member, the
1226          * struct request will survive to setting req->complete to 1
1227          */
1228     if (done)
1229         (*done)(req);
1230 }
1231 
1232 static void
1233 pmu_start(void)
1234 {
1235     struct adb_request *req;
1236 
1237     /* assert pmu_state == idle */
1238     /* get the packet to send */
1239     req = current_req;
1240     if (!req || pmu_state != idle
1241         || (/*req->reply_expected && */req_awaiting_reply))
1242         return;
1243 
1244     pmu_state = sending;
1245     data_index = 1;
1246     data_len = pmu_data_len[req->data[0]][0];
1247 
1248     /* Sounds safer to make sure ACK is high before writing. This helped
1249      * kill a problem with ADB and some iBooks
1250      */
1251     wait_for_ack();
1252     /* set the shift register to shift out and send a byte */
1253     send_byte(req->data[0]);
1254 }
1255 
1256 void
1257 pmu_poll(void)
1258 {
1259     if (pmu_state == uninitialized)
1260         return;
1261     if (disable_poll)
1262         return;
1263     via_pmu_interrupt(0, NULL);
1264 }
1265 
1266 void
1267 pmu_poll_adb(void)
1268 {
1269     if (pmu_state == uninitialized)
1270         return;
1271     if (disable_poll)
1272         return;
1273     /* Kicks ADB read when PMU is suspended */
1274     adb_int_pending = 1;
1275     do {
1276         via_pmu_interrupt(0, NULL);
1277     } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1278         || req_awaiting_reply));
1279 }
1280 
1281 void
1282 pmu_wait_complete(struct adb_request *req)
1283 {
1284     if (pmu_state == uninitialized)
1285         return;
1286     while((pmu_state != idle && pmu_state != locked) || !req->complete)
1287         via_pmu_interrupt(0, NULL);
1288 }
1289 
1290 /* This function loops until the PMU is idle and prevents it from
1291  * anwsering to ADB interrupts. pmu_request can still be called.
1292  * This is done to avoid spurrious shutdowns when we know we'll have
1293  * interrupts switched off for a long time
1294  */
1295 void
1296 pmu_suspend(void)
1297 {
1298     unsigned long flags;
1299 
1300     if (pmu_state == uninitialized)
1301         return;
1302     
1303     spin_lock_irqsave(&pmu_lock, flags);
1304     pmu_suspended++;
1305     if (pmu_suspended > 1) {
1306         spin_unlock_irqrestore(&pmu_lock, flags);
1307         return;
1308     }
1309 
1310     do {
1311         spin_unlock_irqrestore(&pmu_lock, flags);
1312         if (req_awaiting_reply)
1313             adb_int_pending = 1;
1314         via_pmu_interrupt(0, NULL);
1315         spin_lock_irqsave(&pmu_lock, flags);
1316         if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1317             if (gpio_irq >= 0)
1318                 disable_irq_nosync(gpio_irq);
1319             out_8(&via1[IER], CB1_INT | IER_CLR);
1320             spin_unlock_irqrestore(&pmu_lock, flags);
1321             break;
1322         }
1323     } while (1);
1324 }
1325 
1326 void
1327 pmu_resume(void)
1328 {
1329     unsigned long flags;
1330 
1331     if (pmu_state == uninitialized || pmu_suspended < 1)
1332         return;
1333 
1334     spin_lock_irqsave(&pmu_lock, flags);
1335     pmu_suspended--;
1336     if (pmu_suspended > 0) {
1337         spin_unlock_irqrestore(&pmu_lock, flags);
1338         return;
1339     }
1340     adb_int_pending = 1;
1341     if (gpio_irq >= 0)
1342         enable_irq(gpio_irq);
1343     out_8(&via1[IER], CB1_INT | IER_SET);
1344     spin_unlock_irqrestore(&pmu_lock, flags);
1345     pmu_poll();
1346 }
1347 
1348 /* Interrupt data could be the result data from an ADB cmd */
1349 static void
1350 pmu_handle_data(unsigned char *data, int len)
1351 {
1352     unsigned char ints;
1353     int idx;
1354     int i = 0;
1355 
1356     asleep = 0;
1357     if (drop_interrupts || len < 1) {
1358         adb_int_pending = 0;
1359         pmu_irq_stats[8]++;
1360         return;
1361     }
1362 
1363     /* Get PMU interrupt mask */
1364     ints = data[0];
1365 
1366     /* Record zero interrupts for stats */
1367     if (ints == 0)
1368         pmu_irq_stats[9]++;
1369 
1370     /* Hack to deal with ADB autopoll flag */
1371     if (ints & PMU_INT_ADB)
1372         ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1373 
1374 next:
1375     if (ints == 0) {
1376         if (i > pmu_irq_stats[10])
1377             pmu_irq_stats[10] = i;
1378         return;
1379     }
1380     i++;
1381 
1382     idx = ffs(ints) - 1;
1383     ints &= ~BIT(idx);
1384 
1385     pmu_irq_stats[idx]++;
1386 
1387     /* Note: for some reason, we get an interrupt with len=1,
1388      * data[0]==0 after each normal ADB interrupt, at least
1389      * on the Pismo. Still investigating...  --BenH
1390      */
1391     switch (BIT(idx)) {
1392     case PMU_INT_ADB:
1393         if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1394             struct adb_request *req = req_awaiting_reply;
1395             if (!req) {
1396                 printk(KERN_ERR "PMU: extra ADB reply\n");
1397                 return;
1398             }
1399             req_awaiting_reply = NULL;
1400             if (len <= 2)
1401                 req->reply_len = 0;
1402             else {
1403                 memcpy(req->reply, data + 1, len - 1);
1404                 req->reply_len = len - 1;
1405             }
1406             pmu_done(req);
1407         } else {
1408 #ifdef CONFIG_XMON
1409             if (len == 4 && data[1] == 0x2c) {
1410                 extern int xmon_wants_key, xmon_adb_keycode;
1411                 if (xmon_wants_key) {
1412                     xmon_adb_keycode = data[2];
1413                     return;
1414                 }
1415             }
1416 #endif /* CONFIG_XMON */
1417 #ifdef CONFIG_ADB
1418             /*
1419              * XXX On the [23]400 the PMU gives us an up
1420              * event for keycodes 0x74 or 0x75 when the PC
1421              * card eject buttons are released, so we
1422              * ignore those events.
1423              */
1424             if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1425                   && data[1] == 0x2c && data[3] == 0xff
1426                   && (data[2] & ~1) == 0xf4))
1427                 adb_input(data+1, len-1, 1);
1428 #endif /* CONFIG_ADB */     
1429         }
1430         break;
1431 
1432     /* Sound/brightness button pressed */
1433     case PMU_INT_SNDBRT:
1434 #ifdef CONFIG_PMAC_BACKLIGHT
1435         if (len == 3)
1436             pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);
1437 #endif
1438         break;
1439 
1440     /* Tick interrupt */
1441     case PMU_INT_TICK:
1442         /* Environment or tick interrupt, query batteries */
1443         if (pmu_battery_count) {
1444             if ((--query_batt_timer) == 0) {
1445                 query_battery_state();
1446                 query_batt_timer = BATTERY_POLLING_COUNT;
1447             }
1448         }
1449         break;
1450 
1451     case PMU_INT_ENVIRONMENT:
1452         if (pmu_battery_count)
1453             query_battery_state();
1454         pmu_pass_intr(data, len);
1455         /* len == 6 is probably a bad check. But how do I
1456          * know what PMU versions send what events here? */
1457         if (IS_ENABLED(CONFIG_ADB_PMU_EVENT) && len == 6) {
1458             via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
1459             via_pmu_event(PMU_EVT_LID, data[1]&1);
1460         }
1461         break;
1462 
1463     default:
1464            pmu_pass_intr(data, len);
1465     }
1466     goto next;
1467 }
1468 
1469 static struct adb_request*
1470 pmu_sr_intr(void)
1471 {
1472     struct adb_request *req;
1473     int bite = 0;
1474 
1475     if (in_8(&via2[B]) & TREQ) {
1476         printk(KERN_ERR "PMU: spurious SR intr (%x)\n", in_8(&via2[B]));
1477         return NULL;
1478     }
1479     /* The ack may not yet be low when we get the interrupt */
1480     while ((in_8(&via2[B]) & TACK) != 0)
1481             ;
1482 
1483     /* if reading grab the byte, and reset the interrupt */
1484     if (pmu_state == reading || pmu_state == reading_intr)
1485         bite = in_8(&via1[SR]);
1486 
1487     /* reset TREQ and wait for TACK to go high */
1488     out_8(&via2[B], in_8(&via2[B]) | TREQ);
1489     wait_for_ack();
1490 
1491     switch (pmu_state) {
1492     case sending:
1493         req = current_req;
1494         if (data_len < 0) {
1495             data_len = req->nbytes - 1;
1496             send_byte(data_len);
1497             break;
1498         }
1499         if (data_index <= data_len) {
1500             send_byte(req->data[data_index++]);
1501             break;
1502         }
1503         req->sent = 1;
1504         data_len = pmu_data_len[req->data[0]][1];
1505         if (data_len == 0) {
1506             pmu_state = idle;
1507             current_req = req->next;
1508             if (req->reply_expected)
1509                 req_awaiting_reply = req;
1510             else
1511                 return req;
1512         } else {
1513             pmu_state = reading;
1514             data_index = 0;
1515             reply_ptr = req->reply + req->reply_len;
1516             recv_byte();
1517         }
1518         break;
1519 
1520     case intack:
1521         data_index = 0;
1522         data_len = -1;
1523         pmu_state = reading_intr;
1524         reply_ptr = interrupt_data[int_data_last];
1525         recv_byte();
1526         if (gpio_irq >= 0 && !gpio_irq_enabled) {
1527             enable_irq(gpio_irq);
1528             gpio_irq_enabled = 1;
1529         }
1530         break;
1531 
1532     case reading:
1533     case reading_intr:
1534         if (data_len == -1) {
1535             data_len = bite;
1536             if (bite > 32)
1537                 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1538         } else if (data_index < 32) {
1539             reply_ptr[data_index++] = bite;
1540         }
1541         if (data_index < data_len) {
1542             recv_byte();
1543             break;
1544         }
1545 
1546         if (pmu_state == reading_intr) {
1547             pmu_state = idle;
1548             int_data_state[int_data_last] = int_data_ready;
1549             interrupt_data_len[int_data_last] = data_len;
1550         } else {
1551             req = current_req;
1552             /* 
1553              * For PMU sleep and freq change requests, we lock the
1554              * PMU until it's explicitly unlocked. This avoids any
1555              * spurrious event polling getting in
1556              */
1557             current_req = req->next;
1558             req->reply_len += data_index;
1559             if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1560                 pmu_state = locked;
1561             else
1562                 pmu_state = idle;
1563             return req;
1564         }
1565         break;
1566 
1567     default:
1568         printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1569                pmu_state);
1570     }
1571     return NULL;
1572 }
1573 
1574 static irqreturn_t
1575 via_pmu_interrupt(int irq, void *arg)
1576 {
1577     unsigned long flags;
1578     int intr;
1579     int nloop = 0;
1580     int int_data = -1;
1581     struct adb_request *req = NULL;
1582     int handled = 0;
1583 
1584     /* This is a bit brutal, we can probably do better */
1585     spin_lock_irqsave(&pmu_lock, flags);
1586     ++disable_poll;
1587     
1588     for (;;) {
1589         /* On 68k Macs, VIA interrupts are dispatched individually.
1590          * Unless we are polling, the relevant IRQ flag has already
1591          * been cleared.
1592          */
1593         intr = 0;
1594         if (IS_ENABLED(CONFIG_PPC_PMAC) || !irq) {
1595             intr = in_8(&via1[IFR]) & (SR_INT | CB1_INT);
1596             out_8(&via1[IFR], intr);
1597         }
1598 #ifndef CONFIG_PPC_PMAC
1599         switch (irq) {
1600         case IRQ_MAC_ADB_CL:
1601             intr = CB1_INT;
1602             break;
1603         case IRQ_MAC_ADB_SR:
1604             intr = SR_INT;
1605             break;
1606         }
1607 #endif
1608         if (intr == 0)
1609             break;
1610         handled = 1;
1611         if (++nloop > 1000) {
1612             printk(KERN_DEBUG "PMU: stuck in intr loop, "
1613                    "intr=%x, ier=%x pmu_state=%d\n",
1614                    intr, in_8(&via1[IER]), pmu_state);
1615             break;
1616         }
1617         if (intr & CB1_INT) {
1618             adb_int_pending = 1;
1619             pmu_irq_stats[11]++;
1620         }
1621         if (intr & SR_INT) {
1622             req = pmu_sr_intr();
1623             if (req)
1624                 break;
1625         }
1626 #ifndef CONFIG_PPC_PMAC
1627         break;
1628 #endif
1629     }
1630 
1631 recheck:
1632     if (pmu_state == idle) {
1633         if (adb_int_pending) {
1634             if (int_data_state[0] == int_data_empty)
1635                 int_data_last = 0;
1636             else if (int_data_state[1] == int_data_empty)
1637                 int_data_last = 1;
1638             else
1639                 goto no_free_slot;
1640             pmu_state = intack;
1641             int_data_state[int_data_last] = int_data_fill;
1642             /* Sounds safer to make sure ACK is high before writing.
1643              * This helped kill a problem with ADB and some iBooks
1644              */
1645             wait_for_ack();
1646             send_byte(PMU_INT_ACK);
1647             adb_int_pending = 0;
1648         } else if (current_req)
1649             pmu_start();
1650     }
1651 no_free_slot:           
1652     /* Mark the oldest buffer for flushing */
1653     if (int_data_state[!int_data_last] == int_data_ready) {
1654         int_data_state[!int_data_last] = int_data_flush;
1655         int_data = !int_data_last;
1656     } else if (int_data_state[int_data_last] == int_data_ready) {
1657         int_data_state[int_data_last] = int_data_flush;
1658         int_data = int_data_last;
1659     }
1660     --disable_poll;
1661     spin_unlock_irqrestore(&pmu_lock, flags);
1662 
1663     /* Deal with completed PMU requests outside of the lock */
1664     if (req) {
1665         pmu_done(req);
1666         req = NULL;
1667     }
1668         
1669     /* Deal with interrupt datas outside of the lock */
1670     if (int_data >= 0) {
1671         pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]);
1672         spin_lock_irqsave(&pmu_lock, flags);
1673         ++disable_poll;
1674         int_data_state[int_data] = int_data_empty;
1675         int_data = -1;
1676         goto recheck;
1677     }
1678 
1679     return IRQ_RETVAL(handled);
1680 }
1681 
1682 void
1683 pmu_unlock(void)
1684 {
1685     unsigned long flags;
1686 
1687     spin_lock_irqsave(&pmu_lock, flags);
1688     if (pmu_state == locked)
1689         pmu_state = idle;
1690     adb_int_pending = 1;
1691     spin_unlock_irqrestore(&pmu_lock, flags);
1692 }
1693 
1694 
1695 static __maybe_unused irqreturn_t
1696 gpio1_interrupt(int irq, void *arg)
1697 {
1698     unsigned long flags;
1699 
1700     if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1701         spin_lock_irqsave(&pmu_lock, flags);
1702         if (gpio_irq_enabled > 0) {
1703             disable_irq_nosync(gpio_irq);
1704             gpio_irq_enabled = 0;
1705         }
1706         pmu_irq_stats[12]++;
1707         adb_int_pending = 1;
1708         spin_unlock_irqrestore(&pmu_lock, flags);
1709         via_pmu_interrupt(0, NULL);
1710         return IRQ_HANDLED;
1711     }
1712     return IRQ_NONE;
1713 }
1714 
1715 void
1716 pmu_enable_irled(int on)
1717 {
1718     struct adb_request req;
1719 
1720     if (pmu_state == uninitialized)
1721         return ;
1722     if (pmu_kind == PMU_KEYLARGO_BASED)
1723         return ;
1724 
1725     pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1726         (on ? PMU_POW_ON : PMU_POW_OFF));
1727     pmu_wait_complete(&req);
1728 }
1729 
1730 /* Offset between Unix time (1970-based) and Mac time (1904-based) */
1731 #define RTC_OFFSET  2082844800
1732 
1733 time64_t pmu_get_time(void)
1734 {
1735     struct adb_request req;
1736     u32 now;
1737 
1738     if (pmu_request(&req, NULL, 1, PMU_READ_RTC) < 0)
1739         return 0;
1740     pmu_wait_complete(&req);
1741     if (req.reply_len != 4)
1742         pr_err("%s: got %d byte reply\n", __func__, req.reply_len);
1743     now = (req.reply[0] << 24) + (req.reply[1] << 16) +
1744           (req.reply[2] << 8) + req.reply[3];
1745     return (time64_t)now - RTC_OFFSET;
1746 }
1747 
1748 int pmu_set_rtc_time(struct rtc_time *tm)
1749 {
1750     u32 now;
1751     struct adb_request req;
1752 
1753     now = lower_32_bits(rtc_tm_to_time64(tm) + RTC_OFFSET);
1754     if (pmu_request(&req, NULL, 5, PMU_SET_RTC,
1755                     now >> 24, now >> 16, now >> 8, now) < 0)
1756         return -ENXIO;
1757     pmu_wait_complete(&req);
1758     if (req.reply_len != 0)
1759         pr_err("%s: got %d byte reply\n", __func__, req.reply_len);
1760     return 0;
1761 }
1762 
1763 void
1764 pmu_restart(void)
1765 {
1766     struct adb_request req;
1767 
1768     if (pmu_state == uninitialized)
1769         return;
1770 
1771     local_irq_disable();
1772 
1773     drop_interrupts = 1;
1774     
1775     if (pmu_kind != PMU_KEYLARGO_BASED) {
1776         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1777                         PMU_INT_TICK );
1778         while(!req.complete)
1779             pmu_poll();
1780     }
1781 
1782     pmu_request(&req, NULL, 1, PMU_RESET);
1783     pmu_wait_complete(&req);
1784     for (;;)
1785         ;
1786 }
1787 
1788 void
1789 pmu_shutdown(void)
1790 {
1791     struct adb_request req;
1792 
1793     if (pmu_state == uninitialized)
1794         return;
1795 
1796     local_irq_disable();
1797 
1798     drop_interrupts = 1;
1799 
1800     if (pmu_kind != PMU_KEYLARGO_BASED) {
1801         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1802                         PMU_INT_TICK );
1803         pmu_wait_complete(&req);
1804     } else {
1805         /* Disable server mode on shutdown or we'll just
1806          * wake up again
1807          */
1808         pmu_set_server_mode(0);
1809     }
1810 
1811     pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1812             'M', 'A', 'T', 'T');
1813     pmu_wait_complete(&req);
1814     for (;;)
1815         ;
1816 }
1817 
1818 int
1819 pmu_present(void)
1820 {
1821     return pmu_state != uninitialized;
1822 }
1823 
1824 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
1825 /*
1826  * Put the powerbook to sleep.
1827  */
1828  
1829 static u32 save_via[8];
1830 static int __fake_sleep;
1831 
1832 static void
1833 save_via_state(void)
1834 {
1835     save_via[0] = in_8(&via1[ANH]);
1836     save_via[1] = in_8(&via1[DIRA]);
1837     save_via[2] = in_8(&via1[B]);
1838     save_via[3] = in_8(&via1[DIRB]);
1839     save_via[4] = in_8(&via1[PCR]);
1840     save_via[5] = in_8(&via1[ACR]);
1841     save_via[6] = in_8(&via1[T1CL]);
1842     save_via[7] = in_8(&via1[T1CH]);
1843 }
1844 static void
1845 restore_via_state(void)
1846 {
1847     out_8(&via1[ANH],  save_via[0]);
1848     out_8(&via1[DIRA], save_via[1]);
1849     out_8(&via1[B],    save_via[2]);
1850     out_8(&via1[DIRB], save_via[3]);
1851     out_8(&via1[PCR],  save_via[4]);
1852     out_8(&via1[ACR],  save_via[5]);
1853     out_8(&via1[T1CL], save_via[6]);
1854     out_8(&via1[T1CH], save_via[7]);
1855     out_8(&via1[IER], IER_CLR | 0x7f);  /* disable all intrs */
1856     out_8(&via1[IFR], 0x7f);            /* clear IFR */
1857     out_8(&via1[IER], IER_SET | SR_INT | CB1_INT);
1858 }
1859 
1860 #define GRACKLE_PM  (1<<7)
1861 #define GRACKLE_DOZE    (1<<5)
1862 #define GRACKLE_NAP (1<<4)
1863 #define GRACKLE_SLEEP   (1<<3)
1864 
1865 static int powerbook_sleep_grackle(void)
1866 {
1867     unsigned long save_l2cr;
1868     unsigned short pmcr1;
1869     struct adb_request req;
1870     struct pci_dev *grackle;
1871 
1872     grackle = pci_get_domain_bus_and_slot(0, 0, 0);
1873     if (!grackle)
1874         return -ENODEV;
1875 
1876     /* Turn off various things. Darwin does some retry tests here... */
1877     pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
1878     pmu_wait_complete(&req);
1879     pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1880         PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1881     pmu_wait_complete(&req);
1882 
1883     /* For 750, save backside cache setting and disable it */
1884     save_l2cr = _get_L2CR();    /* (returns -1 if not available) */
1885 
1886     if (!__fake_sleep) {
1887         /* Ask the PMU to put us to sleep */
1888         pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1889         pmu_wait_complete(&req);
1890     }
1891 
1892     /* The VIA is supposed not to be restored correctly*/
1893     save_via_state();
1894     /* We shut down some HW */
1895     pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
1896 
1897     pci_read_config_word(grackle, 0x70, &pmcr1);
1898     /* Apparently, MacOS uses NAP mode for Grackle ??? */
1899     pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP); 
1900     pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
1901     pci_write_config_word(grackle, 0x70, pmcr1);
1902 
1903     /* Call low-level ASM sleep handler */
1904     if (__fake_sleep)
1905         mdelay(5000);
1906     else
1907         low_sleep_handler();
1908 
1909     /* We're awake again, stop grackle PM */
1910     pci_read_config_word(grackle, 0x70, &pmcr1);
1911     pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP); 
1912     pci_write_config_word(grackle, 0x70, pmcr1);
1913 
1914     pci_dev_put(grackle);
1915 
1916     /* Make sure the PMU is idle */
1917     pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
1918     restore_via_state();
1919     
1920     /* Restore L2 cache */
1921     if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1922         _set_L2CR(save_l2cr);
1923     
1924     /* Restore userland MMU context */
1925     switch_mmu_context(NULL, current->active_mm, NULL);
1926 
1927     /* Power things up */
1928     pmu_unlock();
1929     pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1930     pmu_wait_complete(&req);
1931     pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
1932             PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
1933     pmu_wait_complete(&req);
1934     pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1935             PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1936     pmu_wait_complete(&req);
1937 
1938     return 0;
1939 }
1940 
1941 static int
1942 powerbook_sleep_Core99(void)
1943 {
1944     unsigned long save_l2cr;
1945     unsigned long save_l3cr;
1946     struct adb_request req;
1947     
1948     if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
1949         printk(KERN_ERR "Sleep mode not supported on this machine\n");
1950         return -ENOSYS;
1951     }
1952 
1953     if (num_online_cpus() > 1 || cpu_is_offline(0))
1954         return -EAGAIN;
1955 
1956     /* Stop environment and ADB interrupts */
1957     pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1958     pmu_wait_complete(&req);
1959 
1960     /* Tell PMU what events will wake us up */
1961     pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
1962         0xff, 0xff);
1963     pmu_wait_complete(&req);
1964     pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
1965         0, PMU_PWR_WAKEUP_KEY |
1966         (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
1967     pmu_wait_complete(&req);
1968 
1969     /* Save the state of the L2 and L3 caches */
1970     save_l3cr = _get_L3CR();    /* (returns -1 if not available) */
1971     save_l2cr = _get_L2CR();    /* (returns -1 if not available) */
1972 
1973     if (!__fake_sleep) {
1974         /* Ask the PMU to put us to sleep */
1975         pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1976         pmu_wait_complete(&req);
1977     }
1978 
1979     /* The VIA is supposed not to be restored correctly*/
1980     save_via_state();
1981 
1982     /* Shut down various ASICs. There's a chance that we can no longer
1983      * talk to the PMU after this, so I moved it to _after_ sending the
1984      * sleep command to it. Still need to be checked.
1985      */
1986     pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1987 
1988     /* Call low-level ASM sleep handler */
1989     if (__fake_sleep)
1990         mdelay(5000);
1991     else
1992         low_sleep_handler();
1993 
1994     /* Restore Apple core ASICs state */
1995     pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
1996 
1997     /* Restore VIA */
1998     restore_via_state();
1999 
2000     /* tweak LPJ before cpufreq is there */
2001     loops_per_jiffy *= 2;
2002 
2003     /* Restore video */
2004     pmac_call_early_video_resume();
2005 
2006     /* Restore L2 cache */
2007     if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2008         _set_L2CR(save_l2cr);
2009     /* Restore L3 cache */
2010     if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
2011         _set_L3CR(save_l3cr);
2012     
2013     /* Restore userland MMU context */
2014     switch_mmu_context(NULL, current->active_mm, NULL);
2015 
2016     /* Tell PMU we are ready */
2017     pmu_unlock();
2018     pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2019     pmu_wait_complete(&req);
2020     pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2021     pmu_wait_complete(&req);
2022 
2023     /* Restore LPJ, cpufreq will adjust the cpu frequency */
2024     loops_per_jiffy /= 2;
2025 
2026     return 0;
2027 }
2028 
2029 #define PB3400_MEM_CTRL     0xf8000000
2030 #define PB3400_MEM_CTRL_SLEEP   0x70
2031 
2032 static void __iomem *pb3400_mem_ctrl;
2033 
2034 static void powerbook_sleep_init_3400(void)
2035 {
2036     /* map in the memory controller registers */
2037     pb3400_mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
2038     if (pb3400_mem_ctrl == NULL)
2039         printk(KERN_WARNING "ioremap failed: sleep won't be possible");
2040 }
2041 
2042 static int powerbook_sleep_3400(void)
2043 {
2044     int i, x;
2045     unsigned int hid0;
2046     unsigned long msr;
2047     struct adb_request sleep_req;
2048     unsigned int __iomem *mem_ctrl_sleep;
2049 
2050     if (pb3400_mem_ctrl == NULL)
2051         return -ENOMEM;
2052     mem_ctrl_sleep = pb3400_mem_ctrl + PB3400_MEM_CTRL_SLEEP;
2053 
2054     /* Set the memory controller to keep the memory refreshed
2055        while we're asleep */
2056     for (i = 0x403f; i >= 0x4000; --i) {
2057         out_be32(mem_ctrl_sleep, i);
2058         do {
2059             x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
2060         } while (x == 0);
2061         if (x >= 0x100)
2062             break;
2063     }
2064 
2065     /* Ask the PMU to put us to sleep */
2066     pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2067     pmu_wait_complete(&sleep_req);
2068     pmu_unlock();
2069 
2070     pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
2071 
2072     asleep = 1;
2073 
2074     /* Put the CPU into sleep mode */
2075     hid0 = mfspr(SPRN_HID0);
2076     hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
2077     mtspr(SPRN_HID0, hid0);
2078     local_irq_enable();
2079     msr = mfmsr() | MSR_POW;
2080     while (asleep) {
2081         mb();
2082         mtmsr(msr);
2083         isync();
2084     }
2085     local_irq_disable();
2086 
2087     /* OK, we're awake again, start restoring things */
2088     out_be32(mem_ctrl_sleep, 0x3f);
2089     pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2090 
2091     return 0;
2092 }
2093 
2094 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2095 
2096 /*
2097  * Support for /dev/pmu device
2098  */
2099 #define RB_SIZE     0x10
2100 struct pmu_private {
2101     struct list_head list;
2102     int rb_get;
2103     int rb_put;
2104     struct rb_entry {
2105         unsigned short len;
2106         unsigned char data[16];
2107     }   rb_buf[RB_SIZE];
2108     wait_queue_head_t wait;
2109     spinlock_t lock;
2110 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2111     int backlight_locker;
2112 #endif
2113 };
2114 
2115 static LIST_HEAD(all_pmu_pvt);
2116 static DEFINE_SPINLOCK(all_pvt_lock);
2117 
2118 static void
2119 pmu_pass_intr(unsigned char *data, int len)
2120 {
2121     struct pmu_private *pp;
2122     struct list_head *list;
2123     int i;
2124     unsigned long flags;
2125 
2126     if (len > sizeof(pp->rb_buf[0].data))
2127         len = sizeof(pp->rb_buf[0].data);
2128     spin_lock_irqsave(&all_pvt_lock, flags);
2129     for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2130         pp = list_entry(list, struct pmu_private, list);
2131         spin_lock(&pp->lock);
2132         i = pp->rb_put + 1;
2133         if (i >= RB_SIZE)
2134             i = 0;
2135         if (i != pp->rb_get) {
2136             struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2137             rp->len = len;
2138             memcpy(rp->data, data, len);
2139             pp->rb_put = i;
2140             wake_up_interruptible(&pp->wait);
2141         }
2142         spin_unlock(&pp->lock);
2143     }
2144     spin_unlock_irqrestore(&all_pvt_lock, flags);
2145 }
2146 
2147 static int
2148 pmu_open(struct inode *inode, struct file *file)
2149 {
2150     struct pmu_private *pp;
2151     unsigned long flags;
2152 
2153     pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2154     if (!pp)
2155         return -ENOMEM;
2156     pp->rb_get = pp->rb_put = 0;
2157     spin_lock_init(&pp->lock);
2158     init_waitqueue_head(&pp->wait);
2159     mutex_lock(&pmu_info_proc_mutex);
2160     spin_lock_irqsave(&all_pvt_lock, flags);
2161 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2162     pp->backlight_locker = 0;
2163 #endif
2164     list_add(&pp->list, &all_pmu_pvt);
2165     spin_unlock_irqrestore(&all_pvt_lock, flags);
2166     file->private_data = pp;
2167     mutex_unlock(&pmu_info_proc_mutex);
2168     return 0;
2169 }
2170 
2171 static ssize_t 
2172 pmu_read(struct file *file, char __user *buf,
2173             size_t count, loff_t *ppos)
2174 {
2175     struct pmu_private *pp = file->private_data;
2176     DECLARE_WAITQUEUE(wait, current);
2177     unsigned long flags;
2178     int ret = 0;
2179 
2180     if (count < 1 || !pp)
2181         return -EINVAL;
2182 
2183     spin_lock_irqsave(&pp->lock, flags);
2184     add_wait_queue(&pp->wait, &wait);
2185     set_current_state(TASK_INTERRUPTIBLE);
2186 
2187     for (;;) {
2188         ret = -EAGAIN;
2189         if (pp->rb_get != pp->rb_put) {
2190             int i = pp->rb_get;
2191             struct rb_entry *rp = &pp->rb_buf[i];
2192             ret = rp->len;
2193             spin_unlock_irqrestore(&pp->lock, flags);
2194             if (ret > count)
2195                 ret = count;
2196             if (ret > 0 && copy_to_user(buf, rp->data, ret))
2197                 ret = -EFAULT;
2198             if (++i >= RB_SIZE)
2199                 i = 0;
2200             spin_lock_irqsave(&pp->lock, flags);
2201             pp->rb_get = i;
2202         }
2203         if (ret >= 0)
2204             break;
2205         if (file->f_flags & O_NONBLOCK)
2206             break;
2207         ret = -ERESTARTSYS;
2208         if (signal_pending(current))
2209             break;
2210         spin_unlock_irqrestore(&pp->lock, flags);
2211         schedule();
2212         spin_lock_irqsave(&pp->lock, flags);
2213     }
2214     __set_current_state(TASK_RUNNING);
2215     remove_wait_queue(&pp->wait, &wait);
2216     spin_unlock_irqrestore(&pp->lock, flags);
2217     
2218     return ret;
2219 }
2220 
2221 static ssize_t
2222 pmu_write(struct file *file, const char __user *buf,
2223              size_t count, loff_t *ppos)
2224 {
2225     return 0;
2226 }
2227 
2228 static __poll_t
2229 pmu_fpoll(struct file *filp, poll_table *wait)
2230 {
2231     struct pmu_private *pp = filp->private_data;
2232     __poll_t mask = 0;
2233     unsigned long flags;
2234     
2235     if (!pp)
2236         return 0;
2237     poll_wait(filp, &pp->wait, wait);
2238     spin_lock_irqsave(&pp->lock, flags);
2239     if (pp->rb_get != pp->rb_put)
2240         mask |= EPOLLIN;
2241     spin_unlock_irqrestore(&pp->lock, flags);
2242     return mask;
2243 }
2244 
2245 static int
2246 pmu_release(struct inode *inode, struct file *file)
2247 {
2248     struct pmu_private *pp = file->private_data;
2249     unsigned long flags;
2250 
2251     if (pp) {
2252         file->private_data = NULL;
2253         spin_lock_irqsave(&all_pvt_lock, flags);
2254         list_del(&pp->list);
2255         spin_unlock_irqrestore(&all_pvt_lock, flags);
2256 
2257 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2258         if (pp->backlight_locker)
2259             pmac_backlight_enable();
2260 #endif
2261 
2262         kfree(pp);
2263     }
2264     return 0;
2265 }
2266 
2267 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2268 static void pmac_suspend_disable_irqs(void)
2269 {
2270     /* Call platform functions marked "on sleep" */
2271     pmac_pfunc_i2c_suspend();
2272     pmac_pfunc_base_suspend();
2273 }
2274 
2275 static int powerbook_sleep(suspend_state_t state)
2276 {
2277     int error = 0;
2278 
2279     /* Wait for completion of async requests */
2280     while (!batt_req.complete)
2281         pmu_poll();
2282 
2283     /* Giveup the lazy FPU & vec so we don't have to back them
2284      * up from the low level code
2285      */
2286     enable_kernel_fp();
2287 
2288 #ifdef CONFIG_ALTIVEC
2289     if (cpu_has_feature(CPU_FTR_ALTIVEC))
2290         enable_kernel_altivec();
2291 #endif /* CONFIG_ALTIVEC */
2292 
2293     switch (pmu_kind) {
2294     case PMU_OHARE_BASED:
2295         error = powerbook_sleep_3400();
2296         break;
2297     case PMU_HEATHROW_BASED:
2298     case PMU_PADDINGTON_BASED:
2299         error = powerbook_sleep_grackle();
2300         break;
2301     case PMU_KEYLARGO_BASED:
2302         error = powerbook_sleep_Core99();
2303         break;
2304     default:
2305         return -ENOSYS;
2306     }
2307 
2308     if (error)
2309         return error;
2310 
2311     mdelay(100);
2312 
2313     return 0;
2314 }
2315 
2316 static void pmac_suspend_enable_irqs(void)
2317 {
2318     /* Force a poll of ADB interrupts */
2319     adb_int_pending = 1;
2320     via_pmu_interrupt(0, NULL);
2321 
2322     mdelay(10);
2323 
2324     /* Call platform functions marked "on wake" */
2325     pmac_pfunc_base_resume();
2326     pmac_pfunc_i2c_resume();
2327 }
2328 
2329 static int pmu_sleep_valid(suspend_state_t state)
2330 {
2331     return state == PM_SUSPEND_MEM
2332         && (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) >= 0);
2333 }
2334 
2335 static const struct platform_suspend_ops pmu_pm_ops = {
2336     .enter = powerbook_sleep,
2337     .valid = pmu_sleep_valid,
2338 };
2339 
2340 static int register_pmu_pm_ops(void)
2341 {
2342     if (pmu_kind == PMU_OHARE_BASED)
2343         powerbook_sleep_init_3400();
2344     ppc_md.suspend_disable_irqs = pmac_suspend_disable_irqs;
2345     ppc_md.suspend_enable_irqs = pmac_suspend_enable_irqs;
2346     suspend_set_ops(&pmu_pm_ops);
2347 
2348     return 0;
2349 }
2350 
2351 device_initcall(register_pmu_pm_ops);
2352 #endif
2353 
2354 static int pmu_ioctl(struct file *filp,
2355              u_int cmd, u_long arg)
2356 {
2357     __u32 __user *argp = (__u32 __user *)arg;
2358     int error = -EINVAL;
2359 
2360     switch (cmd) {
2361 #ifdef CONFIG_PPC_PMAC
2362     case PMU_IOC_SLEEP:
2363         if (!capable(CAP_SYS_ADMIN))
2364             return -EACCES;
2365         return pm_suspend(PM_SUSPEND_MEM);
2366     case PMU_IOC_CAN_SLEEP:
2367         if (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) < 0)
2368             return put_user(0, argp);
2369         else
2370             return put_user(1, argp);
2371 #endif
2372 
2373 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
2374     /* Compatibility ioctl's for backlight */
2375     case PMU_IOC_GET_BACKLIGHT:
2376     {
2377         int brightness;
2378 
2379         brightness = pmac_backlight_get_legacy_brightness();
2380         if (brightness < 0)
2381             return brightness;
2382         else
2383             return put_user(brightness, argp);
2384 
2385     }
2386     case PMU_IOC_SET_BACKLIGHT:
2387     {
2388         int brightness;
2389 
2390         error = get_user(brightness, argp);
2391         if (error)
2392             return error;
2393 
2394         return pmac_backlight_set_legacy_brightness(brightness);
2395     }
2396 #ifdef CONFIG_INPUT_ADBHID
2397     case PMU_IOC_GRAB_BACKLIGHT: {
2398         struct pmu_private *pp = filp->private_data;
2399 
2400         if (pp->backlight_locker)
2401             return 0;
2402 
2403         pp->backlight_locker = 1;
2404         pmac_backlight_disable();
2405 
2406         return 0;
2407     }
2408 #endif /* CONFIG_INPUT_ADBHID */
2409 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2410 
2411     case PMU_IOC_GET_MODEL:
2412             return put_user(pmu_kind, argp);
2413     case PMU_IOC_HAS_ADB:
2414         return put_user(pmu_has_adb, argp);
2415     }
2416     return error;
2417 }
2418 
2419 static long pmu_unlocked_ioctl(struct file *filp,
2420                    u_int cmd, u_long arg)
2421 {
2422     int ret;
2423 
2424     mutex_lock(&pmu_info_proc_mutex);
2425     ret = pmu_ioctl(filp, cmd, arg);
2426     mutex_unlock(&pmu_info_proc_mutex);
2427 
2428     return ret;
2429 }
2430 
2431 #ifdef CONFIG_COMPAT
2432 #define PMU_IOC_GET_BACKLIGHT32 _IOR('B', 1, compat_size_t)
2433 #define PMU_IOC_SET_BACKLIGHT32 _IOW('B', 2, compat_size_t)
2434 #define PMU_IOC_GET_MODEL32 _IOR('B', 3, compat_size_t)
2435 #define PMU_IOC_HAS_ADB32   _IOR('B', 4, compat_size_t)
2436 #define PMU_IOC_CAN_SLEEP32 _IOR('B', 5, compat_size_t)
2437 #define PMU_IOC_GRAB_BACKLIGHT32 _IOR('B', 6, compat_size_t)
2438 
2439 static long compat_pmu_ioctl (struct file *filp, u_int cmd, u_long arg)
2440 {
2441     switch (cmd) {
2442     case PMU_IOC_SLEEP:
2443         break;
2444     case PMU_IOC_GET_BACKLIGHT32:
2445         cmd = PMU_IOC_GET_BACKLIGHT;
2446         break;
2447     case PMU_IOC_SET_BACKLIGHT32:
2448         cmd = PMU_IOC_SET_BACKLIGHT;
2449         break;
2450     case PMU_IOC_GET_MODEL32:
2451         cmd = PMU_IOC_GET_MODEL;
2452         break;
2453     case PMU_IOC_HAS_ADB32:
2454         cmd = PMU_IOC_HAS_ADB;
2455         break;
2456     case PMU_IOC_CAN_SLEEP32:
2457         cmd = PMU_IOC_CAN_SLEEP;
2458         break;
2459     case PMU_IOC_GRAB_BACKLIGHT32:
2460         cmd = PMU_IOC_GRAB_BACKLIGHT;
2461         break;
2462     default:
2463         return -ENOIOCTLCMD;
2464     }
2465     return pmu_unlocked_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
2466 }
2467 #endif
2468 
2469 static const struct file_operations pmu_device_fops = {
2470     .read       = pmu_read,
2471     .write      = pmu_write,
2472     .poll       = pmu_fpoll,
2473     .unlocked_ioctl = pmu_unlocked_ioctl,
2474 #ifdef CONFIG_COMPAT
2475     .compat_ioctl   = compat_pmu_ioctl,
2476 #endif
2477     .open       = pmu_open,
2478     .release    = pmu_release,
2479     .llseek     = noop_llseek,
2480 };
2481 
2482 static struct miscdevice pmu_device = {
2483     PMU_MINOR, "pmu", &pmu_device_fops
2484 };
2485 
2486 static int pmu_device_init(void)
2487 {
2488     if (pmu_state == uninitialized)
2489         return 0;
2490     if (misc_register(&pmu_device) < 0)
2491         printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2492     return 0;
2493 }
2494 device_initcall(pmu_device_init);
2495 
2496 
2497 #ifdef DEBUG_SLEEP
2498 static inline void 
2499 polled_handshake(void)
2500 {
2501     via2[B] &= ~TREQ; eieio();
2502     while ((via2[B] & TACK) != 0)
2503         ;
2504     via2[B] |= TREQ; eieio();
2505     while ((via2[B] & TACK) == 0)
2506         ;
2507 }
2508 
2509 static inline void 
2510 polled_send_byte(int x)
2511 {
2512     via1[ACR] |= SR_OUT | SR_EXT; eieio();
2513     via1[SR] = x; eieio();
2514     polled_handshake();
2515 }
2516 
2517 static inline int
2518 polled_recv_byte(void)
2519 {
2520     int x;
2521 
2522     via1[ACR] = (via1[ACR] & ~SR_OUT) | SR_EXT; eieio();
2523     x = via1[SR]; eieio();
2524     polled_handshake();
2525     x = via1[SR]; eieio();
2526     return x;
2527 }
2528 
2529 int
2530 pmu_polled_request(struct adb_request *req)
2531 {
2532     unsigned long flags;
2533     int i, l, c;
2534 
2535     req->complete = 1;
2536     c = req->data[0];
2537     l = pmu_data_len[c][0];
2538     if (l >= 0 && req->nbytes != l + 1)
2539         return -EINVAL;
2540 
2541     local_irq_save(flags);
2542     while (pmu_state != idle)
2543         pmu_poll();
2544 
2545     while ((via2[B] & TACK) == 0)
2546         ;
2547     polled_send_byte(c);
2548     if (l < 0) {
2549         l = req->nbytes - 1;
2550         polled_send_byte(l);
2551     }
2552     for (i = 1; i <= l; ++i)
2553         polled_send_byte(req->data[i]);
2554 
2555     l = pmu_data_len[c][1];
2556     if (l < 0)
2557         l = polled_recv_byte();
2558     for (i = 0; i < l; ++i)
2559         req->reply[i + req->reply_len] = polled_recv_byte();
2560 
2561     if (req->done)
2562         (*req->done)(req);
2563 
2564     local_irq_restore(flags);
2565     return 0;
2566 }
2567 
2568 /* N.B. This doesn't work on the 3400 */
2569 void pmu_blink(int n)
2570 {
2571     struct adb_request req;
2572 
2573     memset(&req, 0, sizeof(req));
2574 
2575     for (; n > 0; --n) {
2576         req.nbytes = 4;
2577         req.done = NULL;
2578         req.data[0] = 0xee;
2579         req.data[1] = 4;
2580         req.data[2] = 0;
2581         req.data[3] = 1;
2582         req.reply[0] = ADB_RET_OK;
2583         req.reply_len = 1;
2584         req.reply_expected = 0;
2585         pmu_polled_request(&req);
2586         mdelay(50);
2587         req.nbytes = 4;
2588         req.done = NULL;
2589         req.data[0] = 0xee;
2590         req.data[1] = 4;
2591         req.data[2] = 0;
2592         req.data[3] = 0;
2593         req.reply[0] = ADB_RET_OK;
2594         req.reply_len = 1;
2595         req.reply_expected = 0;
2596         pmu_polled_request(&req);
2597         mdelay(50);
2598     }
2599     mdelay(50);
2600 }
2601 #endif /* DEBUG_SLEEP */
2602 
2603 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2604 int pmu_sys_suspended;
2605 
2606 static int pmu_syscore_suspend(void)
2607 {
2608     /* Suspend PMU event interrupts */
2609     pmu_suspend();
2610     pmu_sys_suspended = 1;
2611 
2612 #ifdef CONFIG_PMAC_BACKLIGHT
2613     /* Tell backlight code not to muck around with the chip anymore */
2614     pmu_backlight_set_sleep(1);
2615 #endif
2616 
2617     return 0;
2618 }
2619 
2620 static void pmu_syscore_resume(void)
2621 {
2622     struct adb_request req;
2623 
2624     if (!pmu_sys_suspended)
2625         return;
2626 
2627     /* Tell PMU we are ready */
2628     pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2629     pmu_wait_complete(&req);
2630 
2631 #ifdef CONFIG_PMAC_BACKLIGHT
2632     /* Tell backlight code it can use the chip again */
2633     pmu_backlight_set_sleep(0);
2634 #endif
2635     /* Resume PMU event interrupts */
2636     pmu_resume();
2637     pmu_sys_suspended = 0;
2638 }
2639 
2640 static struct syscore_ops pmu_syscore_ops = {
2641     .suspend = pmu_syscore_suspend,
2642     .resume = pmu_syscore_resume,
2643 };
2644 
2645 static int pmu_syscore_register(void)
2646 {
2647     register_syscore_ops(&pmu_syscore_ops);
2648 
2649     return 0;
2650 }
2651 subsys_initcall(pmu_syscore_register);
2652 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2653 
2654 EXPORT_SYMBOL(pmu_request);
2655 EXPORT_SYMBOL(pmu_queue_request);
2656 EXPORT_SYMBOL(pmu_poll);
2657 EXPORT_SYMBOL(pmu_poll_adb);
2658 EXPORT_SYMBOL(pmu_wait_complete);
2659 EXPORT_SYMBOL(pmu_suspend);
2660 EXPORT_SYMBOL(pmu_resume);
2661 EXPORT_SYMBOL(pmu_unlock);
2662 #if defined(CONFIG_PPC32)
2663 EXPORT_SYMBOL(pmu_enable_irled);
2664 EXPORT_SYMBOL(pmu_battery_count);
2665 EXPORT_SYMBOL(pmu_batteries);
2666 EXPORT_SYMBOL(pmu_power_flags);
2667 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2668
[ Source navigation ] [ Diff markup ] [ Identifier search ] [ general search ]

This page was automatically generated by the 2.1.0 LXR engine.

The LXR team
Valid CSS 2.1! Valid HTML 4.01!