818 строки
20 KiB
C
818 строки
20 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Device driver for the PMU on 68K-based Apple PowerBooks
|
|
*
|
|
* 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 PowerBooks.
|
|
* 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.
|
|
*
|
|
* Adapted for 68K PMU by Joshua M. Thompson
|
|
*
|
|
* Based largely on the PowerMac PMU code by Paul Mackerras and
|
|
* Fabio Riccardi.
|
|
*
|
|
* Also based on the PMU driver from MkLinux by Apple Computer, Inc.
|
|
* and the Open Software Foundation, Inc.
|
|
*/
|
|
|
|
#include <stdarg.h>
|
|
#include <linux/types.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/miscdevice.h>
|
|
#include <linux/blkdev.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/init.h>
|
|
#include <linux/interrupt.h>
|
|
|
|
#include <linux/adb.h>
|
|
#include <linux/pmu.h>
|
|
#include <linux/cuda.h>
|
|
|
|
#include <asm/macintosh.h>
|
|
#include <asm/macints.h>
|
|
#include <asm/mac_via.h>
|
|
|
|
#include <asm/pgtable.h>
|
|
#include <asm/irq.h>
|
|
#include <linux/uaccess.h>
|
|
|
|
/* Misc minor number allocated for /dev/pmu */
|
|
#define PMU_MINOR 154
|
|
|
|
/* 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 0x02 /* Transfer acknowledge (input) */
|
|
#define TREQ 0x04 /* 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 SR_INT 0x04 /* Shift register full/empty */
|
|
#define CB1_INT 0x10 /* transition on CB1 input */
|
|
|
|
static 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[32];
|
|
static unsigned char *reply_ptr;
|
|
static int data_index;
|
|
static int data_len;
|
|
static int adb_int_pending;
|
|
static int pmu_adb_flags;
|
|
static int adb_dev_map;
|
|
static struct adb_request bright_req_1, bright_req_2, bright_req_3;
|
|
static int pmu_kind = PMU_UNKNOWN;
|
|
static int pmu_fully_inited;
|
|
|
|
int asleep;
|
|
|
|
static int pmu_probe(void);
|
|
static int pmu_init(void);
|
|
static void pmu_start(void);
|
|
static irqreturn_t pmu_interrupt(int irq, void *arg);
|
|
static int pmu_send_request(struct adb_request *req, int sync);
|
|
static int pmu_autopoll(int devs);
|
|
void pmu_poll(void);
|
|
static int pmu_reset_bus(void);
|
|
|
|
static void pmu_start(void);
|
|
static void send_byte(int x);
|
|
static void recv_byte(void);
|
|
static void pmu_done(struct adb_request *req);
|
|
static void pmu_handle_data(unsigned char *data, int len);
|
|
static void set_volume(int level);
|
|
static void pmu_enable_backlight(int on);
|
|
static void pmu_set_brightness(int level);
|
|
|
|
struct adb_driver via_pmu_driver = {
|
|
"68K PMU",
|
|
pmu_probe,
|
|
pmu_init,
|
|
pmu_send_request,
|
|
pmu_autopoll,
|
|
pmu_poll,
|
|
pmu_reset_bus
|
|
};
|
|
|
|
/*
|
|
* 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 s8 pmu_data_len[256][2] = {
|
|
/* 0 1 2 3 4 5 6 7 */
|
|
/*00*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
|
|
/*08*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
|
|
/*10*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
|
|
/*18*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
|
|
/*20*/ {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
|
|
/*28*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
|
|
/*30*/ { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
|
|
/*38*/ { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
|
|
/*40*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
|
|
/*48*/ { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
|
|
/*50*/ { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
|
|
/*58*/ { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
|
|
/*60*/ { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
|
|
/*68*/ { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
|
|
/*70*/ { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
|
|
/*78*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
|
|
/*80*/ { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
|
|
/*88*/ { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
|
|
/*90*/ { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
|
|
/*98*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
|
|
/*a0*/ { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
|
|
/*a8*/ { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
|
|
/*b0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
|
|
/*b8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
|
|
/*c0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
|
|
/*c8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
|
|
/*d0*/ { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
|
|
/*d8*/ { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
|
|
/*e0*/ {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
|
|
/*e8*/ { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
|
|
/*f0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
|
|
/*f8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
|
|
};
|
|
|
|
int pmu_probe(void)
|
|
{
|
|
if (macintosh_config->adb_type == MAC_ADB_PB1) {
|
|
pmu_kind = PMU_68K_V1;
|
|
} else if (macintosh_config->adb_type == MAC_ADB_PB2) {
|
|
pmu_kind = PMU_68K_V2;
|
|
} else {
|
|
return -ENODEV;
|
|
}
|
|
|
|
pmu_state = idle;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
pmu_init(void)
|
|
{
|
|
int timeout;
|
|
volatile struct adb_request req;
|
|
|
|
via2[B] |= TREQ; /* negate TREQ */
|
|
via2[DIRB] = (via2[DIRB] | TREQ) & ~TACK; /* TACK in, TREQ out */
|
|
|
|
pmu_request((struct adb_request *) &req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB);
|
|
timeout = 100000;
|
|
while (!req.complete) {
|
|
if (--timeout < 0) {
|
|
printk(KERN_ERR "pmu_init: no response from PMU\n");
|
|
return -EAGAIN;
|
|
}
|
|
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 "pmu_init: timed out acking intrs\n");
|
|
return -EAGAIN;
|
|
}
|
|
if (pmu_state == idle) {
|
|
adb_int_pending = 1;
|
|
pmu_interrupt(0, NULL);
|
|
}
|
|
pmu_poll();
|
|
udelay(10);
|
|
}
|
|
|
|
pmu_request((struct adb_request *) &req, NULL, 2, PMU_SET_INTR_MASK,
|
|
PMU_INT_ADB_AUTO|PMU_INT_SNDBRT|PMU_INT_ADB);
|
|
timeout = 100000;
|
|
while (!req.complete) {
|
|
if (--timeout < 0) {
|
|
printk(KERN_ERR "pmu_init: no response from PMU\n");
|
|
return -EAGAIN;
|
|
}
|
|
udelay(10);
|
|
pmu_poll();
|
|
}
|
|
|
|
bright_req_1.complete = 1;
|
|
bright_req_2.complete = 1;
|
|
bright_req_3.complete = 1;
|
|
|
|
if (request_irq(IRQ_MAC_ADB_SR, pmu_interrupt, 0, "pmu-shift",
|
|
pmu_interrupt)) {
|
|
printk(KERN_ERR "pmu_init: can't get irq %d\n",
|
|
IRQ_MAC_ADB_SR);
|
|
return -EAGAIN;
|
|
}
|
|
if (request_irq(IRQ_MAC_ADB_CL, pmu_interrupt, 0, "pmu-clock",
|
|
pmu_interrupt)) {
|
|
printk(KERN_ERR "pmu_init: can't get irq %d\n",
|
|
IRQ_MAC_ADB_CL);
|
|
free_irq(IRQ_MAC_ADB_SR, pmu_interrupt);
|
|
return -EAGAIN;
|
|
}
|
|
|
|
pmu_fully_inited = 1;
|
|
|
|
/* Enable backlight */
|
|
pmu_enable_backlight(1);
|
|
|
|
printk("adb: PMU 68K driver v0.5 for Unified ADB.\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
pmu_get_model(void)
|
|
{
|
|
return pmu_kind;
|
|
}
|
|
|
|
/* Send an ADB command */
|
|
static int
|
|
pmu_send_request(struct adb_request *req, int sync)
|
|
{
|
|
int i, ret;
|
|
|
|
if (!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;
|
|
case CUDA_GET_PRAM:
|
|
if (req->nbytes != 4)
|
|
break;
|
|
req->data[0] = PMU_READ_NVRAM;
|
|
req->data[1] = req->data[2];
|
|
req->data[2] = req->data[3];
|
|
req->nbytes = 3;
|
|
req->reply_len = 3;
|
|
req->reply[0] = CUDA_PACKET;
|
|
req->reply[1] = 0;
|
|
req->reply[2] = CUDA_GET_PRAM;
|
|
ret = pmu_queue_request(req);
|
|
break;
|
|
case CUDA_SET_PRAM:
|
|
if (req->nbytes != 5)
|
|
break;
|
|
req->data[0] = PMU_WRITE_NVRAM;
|
|
req->data[1] = req->data[2];
|
|
req->data[2] = req->data[3];
|
|
req->data[3] = req->data[4];
|
|
req->nbytes = 4;
|
|
req->reply_len = 3;
|
|
req->reply[0] = CUDA_PACKET;
|
|
req->reply[1] = 0;
|
|
req->reply[2] = CUDA_SET_PRAM;
|
|
ret = pmu_queue_request(req);
|
|
break;
|
|
}
|
|
break;
|
|
case ADB_PACKET:
|
|
for (i = req->nbytes - 1; i > 1; --i)
|
|
req->data[i+2] = req->data[i];
|
|
req->data[3] = req->nbytes - 2;
|
|
req->data[2] = pmu_adb_flags;
|
|
/*req->data[1] = req->data[1];*/
|
|
req->data[0] = PMU_ADB_CMD;
|
|
req->nbytes += 2;
|
|
req->reply_expected = 1;
|
|
req->reply_len = 0;
|
|
ret = pmu_queue_request(req);
|
|
break;
|
|
}
|
|
if (ret)
|
|
{
|
|
req->complete = 1;
|
|
return ret;
|
|
}
|
|
|
|
if (sync) {
|
|
while (!req->complete)
|
|
pmu_poll();
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Enable/disable autopolling */
|
|
static int
|
|
pmu_autopoll(int devs)
|
|
{
|
|
struct adb_request req;
|
|
|
|
if (!pmu_fully_inited) 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
|
|
pmu_reset_bus(void)
|
|
{
|
|
struct adb_request req;
|
|
long timeout;
|
|
int save_autopoll = adb_dev_map;
|
|
|
|
if (!pmu_fully_inited) return -ENXIO;
|
|
|
|
/* anyone got a better idea?? */
|
|
pmu_autopoll(0);
|
|
|
|
req.nbytes = 5;
|
|
req.done = NULL;
|
|
req.data[0] = PMU_ADB_CMD;
|
|
req.data[1] = 0;
|
|
req.data[2] = 3; /* 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();
|
|
timeout = 100000;
|
|
while (!req.complete) {
|
|
if (--timeout < 0) {
|
|
printk(KERN_ERR "pmu_adb_reset_bus (reset): no response from PMU\n");
|
|
return -EIO;
|
|
}
|
|
udelay(10);
|
|
pmu_poll();
|
|
}
|
|
|
|
if (save_autopoll != 0)
|
|
pmu_autopoll(save_autopoll);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Construct and send a pmu request */
|
|
int
|
|
pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
|
|
int nbytes, ...)
|
|
{
|
|
va_list list;
|
|
int i;
|
|
|
|
if (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);
|
|
if (pmu_data_len[req->data[0]][1] != 0) {
|
|
req->reply[0] = ADB_RET_OK;
|
|
req->reply_len = 1;
|
|
} else
|
|
req->reply_len = 0;
|
|
req->reply_expected = 0;
|
|
return pmu_queue_request(req);
|
|
}
|
|
|
|
int
|
|
pmu_queue_request(struct adb_request *req)
|
|
{
|
|
unsigned long flags;
|
|
int nsend;
|
|
|
|
if (req->nbytes <= 0) {
|
|
req->complete = 1;
|
|
return 0;
|
|
}
|
|
nsend = pmu_data_len[req->data[0]][0];
|
|
if (nsend >= 0 && req->nbytes != nsend + 1) {
|
|
req->complete = 1;
|
|
return -EINVAL;
|
|
}
|
|
|
|
req->next = NULL;
|
|
req->sent = 0;
|
|
req->complete = 0;
|
|
local_irq_save(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();
|
|
}
|
|
|
|
local_irq_restore(flags);
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
send_byte(int x)
|
|
{
|
|
via1[ACR] |= SR_CTRL;
|
|
via1[SR] = x;
|
|
via2[B] &= ~TREQ; /* assert TREQ */
|
|
}
|
|
|
|
static void
|
|
recv_byte(void)
|
|
{
|
|
char c;
|
|
|
|
via1[ACR] = (via1[ACR] | SR_EXT) & ~SR_OUT;
|
|
c = via1[SR]; /* resets SR */
|
|
via2[B] &= ~TREQ;
|
|
}
|
|
|
|
static void
|
|
pmu_start(void)
|
|
{
|
|
unsigned long flags;
|
|
struct adb_request *req;
|
|
|
|
/* assert pmu_state == idle */
|
|
/* get the packet to send */
|
|
local_irq_save(flags);
|
|
req = current_req;
|
|
if (req == 0 || pmu_state != idle
|
|
|| (req->reply_expected && req_awaiting_reply))
|
|
goto out;
|
|
|
|
pmu_state = sending;
|
|
data_index = 1;
|
|
data_len = pmu_data_len[req->data[0]][0];
|
|
|
|
/* set the shift register to shift out and send a byte */
|
|
send_byte(req->data[0]);
|
|
|
|
out:
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
void
|
|
pmu_poll(void)
|
|
{
|
|
unsigned long flags;
|
|
|
|
local_irq_save(flags);
|
|
if (via1[IFR] & SR_INT) {
|
|
via1[IFR] = SR_INT;
|
|
pmu_interrupt(IRQ_MAC_ADB_SR, NULL);
|
|
}
|
|
if (via1[IFR] & CB1_INT) {
|
|
via1[IFR] = CB1_INT;
|
|
pmu_interrupt(IRQ_MAC_ADB_CL, NULL);
|
|
}
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
static irqreturn_t
|
|
pmu_interrupt(int irq, void *dev_id)
|
|
{
|
|
struct adb_request *req;
|
|
int timeout, bite = 0; /* to prevent compiler warning */
|
|
|
|
#if 0
|
|
printk("pmu_interrupt: irq %d state %d acr %02X, b %02X data_index %d/%d adb_int_pending %d\n",
|
|
irq, pmu_state, (uint) via1[ACR], (uint) via2[B], data_index, data_len, adb_int_pending);
|
|
#endif
|
|
|
|
if (irq == IRQ_MAC_ADB_CL) { /* CB1 interrupt */
|
|
adb_int_pending = 1;
|
|
} else if (irq == IRQ_MAC_ADB_SR) { /* SR interrupt */
|
|
if (via2[B] & TACK) {
|
|
printk(KERN_DEBUG "PMU: SR_INT but ack still high! (%x)\n", via2[B]);
|
|
}
|
|
|
|
/* if reading grab the byte */
|
|
if ((via1[ACR] & SR_OUT) == 0) bite = via1[SR];
|
|
|
|
/* reset TREQ and wait for TACK to go high */
|
|
via2[B] |= TREQ;
|
|
timeout = 3200;
|
|
while (!(via2[B] & TACK)) {
|
|
if (--timeout < 0) {
|
|
printk(KERN_ERR "PMU not responding (!ack)\n");
|
|
goto finish;
|
|
}
|
|
udelay(10);
|
|
}
|
|
|
|
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
|
|
pmu_done(req);
|
|
} else {
|
|
pmu_state = reading;
|
|
data_index = 0;
|
|
reply_ptr = req->reply + req->reply_len;
|
|
recv_byte();
|
|
}
|
|
break;
|
|
|
|
case intack:
|
|
data_index = 0;
|
|
data_len = -1;
|
|
pmu_state = reading_intr;
|
|
reply_ptr = interrupt_data;
|
|
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 {
|
|
reply_ptr[data_index++] = bite;
|
|
}
|
|
if (data_index < data_len) {
|
|
recv_byte();
|
|
break;
|
|
}
|
|
|
|
if (pmu_state == reading_intr) {
|
|
pmu_handle_data(interrupt_data, data_index);
|
|
} else {
|
|
req = current_req;
|
|
current_req = req->next;
|
|
req->reply_len += data_index;
|
|
pmu_done(req);
|
|
}
|
|
pmu_state = idle;
|
|
|
|
break;
|
|
|
|
default:
|
|
printk(KERN_ERR "pmu_interrupt: unknown state %d?\n",
|
|
pmu_state);
|
|
}
|
|
}
|
|
finish:
|
|
if (pmu_state == idle) {
|
|
if (adb_int_pending) {
|
|
pmu_state = intack;
|
|
send_byte(PMU_INT_ACK);
|
|
adb_int_pending = 0;
|
|
} else if (current_req) {
|
|
pmu_start();
|
|
}
|
|
}
|
|
|
|
#if 0
|
|
printk("pmu_interrupt: exit state %d acr %02X, b %02X data_index %d/%d adb_int_pending %d\n",
|
|
pmu_state, (uint) via1[ACR], (uint) via2[B], data_index, data_len, adb_int_pending);
|
|
#endif
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static void
|
|
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
|
|
pmu_handle_data(unsigned char *data, int len)
|
|
{
|
|
static int show_pmu_ints = 1;
|
|
|
|
asleep = 0;
|
|
if (len < 1) {
|
|
adb_int_pending = 0;
|
|
return;
|
|
}
|
|
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 = NULL;
|
|
if (len <= 2)
|
|
req->reply_len = 0;
|
|
else {
|
|
memcpy(req->reply, data + 1, len - 1);
|
|
req->reply_len = len - 1;
|
|
}
|
|
pmu_done(req);
|
|
} else {
|
|
adb_input(data+1, len-1, 1);
|
|
}
|
|
} else {
|
|
if (data[0] == 0x08 && len == 3) {
|
|
/* sound/brightness buttons pressed */
|
|
pmu_set_brightness(data[1] >> 3);
|
|
set_volume(data[2]);
|
|
} else if (show_pmu_ints
|
|
&& !(data[0] == PMU_INT_TICK && len == 1)) {
|
|
int i;
|
|
printk(KERN_DEBUG "pmu intr");
|
|
for (i = 0; i < len; ++i)
|
|
printk(" %.2x", data[i]);
|
|
printk("\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
static int backlight_level = -1;
|
|
static int backlight_enabled = 0;
|
|
|
|
#define LEVEL_TO_BRIGHT(lev) ((lev) < 1? 0x7f: 0x4a - ((lev) << 1))
|
|
|
|
static void
|
|
pmu_enable_backlight(int on)
|
|
{
|
|
struct adb_request req;
|
|
|
|
if (on) {
|
|
/* first call: get current backlight value */
|
|
if (backlight_level < 0) {
|
|
switch(pmu_kind) {
|
|
case PMU_68K_V1:
|
|
case PMU_68K_V2:
|
|
pmu_request(&req, NULL, 3, PMU_READ_NVRAM, 0x14, 0xe);
|
|
while (!req.complete)
|
|
pmu_poll();
|
|
printk(KERN_DEBUG "pmu: nvram returned bright: %d\n", (int)req.reply[1]);
|
|
backlight_level = req.reply[1];
|
|
break;
|
|
default:
|
|
backlight_enabled = 0;
|
|
return;
|
|
}
|
|
}
|
|
pmu_request(&req, NULL, 2, PMU_BACKLIGHT_BRIGHT,
|
|
LEVEL_TO_BRIGHT(backlight_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();
|
|
backlight_enabled = on;
|
|
}
|
|
|
|
static void
|
|
pmu_set_brightness(int level)
|
|
{
|
|
int bright;
|
|
|
|
backlight_level = level;
|
|
bright = LEVEL_TO_BRIGHT(level);
|
|
if (!backlight_enabled)
|
|
return;
|
|
if (bright_req_1.complete)
|
|
pmu_request(&bright_req_1, NULL, 2, PMU_BACKLIGHT_BRIGHT,
|
|
bright);
|
|
if (bright_req_2.complete)
|
|
pmu_request(&bright_req_2, NULL, 2, PMU_POWER_CTRL,
|
|
PMU_POW_BACKLIGHT | (bright < 0x7f ? PMU_POW_ON : PMU_POW_OFF));
|
|
}
|
|
|
|
void
|
|
pmu_enable_irled(int on)
|
|
{
|
|
struct adb_request req;
|
|
|
|
pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
|
|
(on ? PMU_POW_ON : PMU_POW_OFF));
|
|
while (!req.complete)
|
|
pmu_poll();
|
|
}
|
|
|
|
static void
|
|
set_volume(int level)
|
|
{
|
|
}
|
|
|
|
int
|
|
pmu_present(void)
|
|
{
|
|
return (pmu_kind != PMU_UNKNOWN);
|
|
}
|