patch-2.3.45 linux/drivers/macintosh/via-pmu68k.c
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- Lines: 1065
- Date:
Sun Feb 13 11:21:42 2000
- Orig file:
v2.3.44/linux/drivers/macintosh/via-pmu68k.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.3.44/linux/drivers/macintosh/via-pmu68k.c linux/drivers/macintosh/via-pmu68k.c
@@ -0,0 +1,1064 @@
+/*
+ * 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/config.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/sched.h>
+#include <linux/miscdevice.h>
+#include <linux/blkdev.h>
+#include <linux/pci.h>
+#include <linux/malloc.h>
+#include <linux/init.h>
+
+#include <linux/adb.h>
+#include <linux/pmu.h>
+#include <linux/cuda.h>
+
+#include <asm/macintosh.h>
+#include <asm/macints.h>
+#include <asm/machw.h>
+#include <asm/mac_via.h>
+
+#include <asm/pgtable.h>
+#include <asm/system.h>
+#include <asm/irq.h>
+#include <asm/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 = 0;
+static struct adb_request bright_req_1, bright_req_2, bright_req_3;
+static int pmu_kind = PMU_UNKNOWN;
+static int pmu_fully_inited = 0;
+
+int asleep;
+struct notifier_block *sleep_notifier_list;
+
+static int pmu_probe(void);
+static int pmu_init(void);
+static void pmu_start(void);
+static void pmu_interrupt(int irq, void *arg, struct pt_regs *regs);
+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 int pmu_queue_request(struct adb_request *req);
+
+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,
+ struct pt_regs *regs);
+static void set_volume(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()
+{
+ 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, 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);
+}
+
+static 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 = 0;
+ req->sent = 0;
+ req->complete = 0;
+ save_flags(flags); cli();
+
+ if (current_req != 0) {
+ last_req->next = req;
+ last_req = req;
+ } else {
+ current_req = req;
+ last_req = req;
+ if (pmu_state == idle)
+ pmu_start();
+ }
+
+ restore_flags(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()
+{
+ char c;
+
+ via1[ACR] = (via1[ACR] | SR_EXT) & ~SR_OUT;
+ c = via1[SR]; /* resets SR */
+ via2[B] &= ~TREQ;
+}
+
+static void
+pmu_start()
+{
+ unsigned long flags;
+ struct adb_request *req;
+
+ /* assert pmu_state == idle */
+ /* get the packet to send */
+ save_flags(flags); cli();
+ 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:
+ restore_flags(flags);
+}
+
+void
+pmu_poll()
+{
+ unsigned long cpu_flags;
+
+ save_flags(cpu_flags);
+ cli();
+ if (via1[IFR] & SR_INT) {
+ via1[IFR] = SR_INT;
+ pmu_interrupt(IRQ_MAC_ADB_SR, NULL, NULL);
+ }
+ if (via1[IFR] & CB1_INT) {
+ via1[IFR] = CB1_INT;
+ pmu_interrupt(IRQ_MAC_ADB_CL, NULL, NULL);
+ }
+ restore_flags(cpu_flags);
+}
+
+static void
+pmu_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+ 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, regs);
+ } 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
+}
+
+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, struct pt_regs *regs)
+{
+ 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 = 0;
+ if (len <= 2)
+ req->reply_len = 0;
+ else {
+ memcpy(req->reply, data + 1, len - 1);
+ req->reply_len = len - 1;
+ }
+ pmu_done(req);
+ } else {
+ adb_input(data+1, len-1, regs, 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");
+ }
+ }
+}
+
+int backlight_level = -1;
+int backlight_enabled = 0;
+
+#define LEVEL_TO_BRIGHT(lev) ((lev) < 1? 0x7f: 0x4a - ((lev) << 1))
+
+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;
+}
+
+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);
+}
+
+#if 0 /* needs some work for 68K */
+
+/*
+ * This struct is used to store config register values for
+ * PCI devices which may get powered off when we sleep.
+ */
+static struct pci_save {
+ u16 command;
+ u16 cache_lat;
+ u16 intr;
+} *pbook_pci_saves;
+static int n_pbook_pci_saves;
+
+static inline void __openfirmware
+pbook_pci_save(void)
+{
+ int npci;
+ struct pci_dev *pd;
+ struct pci_save *ps;
+
+ npci = 0;
+ for (pd = pci_devices; pd != NULL; pd = pd->next)
+ ++npci;
+ n_pbook_pci_saves = npci;
+ if (npci == 0)
+ return;
+ ps = (struct pci_save *) kmalloc(npci * sizeof(*ps), GFP_KERNEL);
+ pbook_pci_saves = ps;
+ if (ps == NULL)
+ return;
+
+ for (pd = pci_devices; pd != NULL && npci != 0; pd = pd->next) {
+ pci_read_config_word(pd, PCI_COMMAND, &ps->command);
+ pci_read_config_word(pd, PCI_CACHE_LINE_SIZE, &ps->cache_lat);
+ pci_read_config_word(pd, PCI_INTERRUPT_LINE, &ps->intr);
+ ++ps;
+ --npci;
+ }
+}
+
+static inline void __openfirmware
+pbook_pci_restore(void)
+{
+ u16 cmd;
+ struct pci_save *ps = pbook_pci_saves;
+ struct pci_dev *pd;
+ int j;
+
+ for (pd = pci_devices; pd != NULL; pd = pd->next, ++ps) {
+ if (ps->command == 0)
+ continue;
+ pci_read_config_word(pd, PCI_COMMAND, &cmd);
+ if ((ps->command & ~cmd) == 0)
+ continue;
+ switch (pd->hdr_type) {
+ case PCI_HEADER_TYPE_NORMAL:
+ for (j = 0; j < 6; ++j)
+ pci_write_config_dword(pd,
+ PCI_BASE_ADDRESS_0 + j*4,
+ pd->resource[j].start);
+ pci_write_config_dword(pd, PCI_ROM_ADDRESS,
+ pd->resource[PCI_ROM_RESOURCE].start);
+ pci_write_config_word(pd, PCI_CACHE_LINE_SIZE,
+ ps->cache_lat);
+ pci_write_config_word(pd, PCI_INTERRUPT_LINE,
+ ps->intr);
+ pci_write_config_word(pd, PCI_COMMAND, ps->command);
+ break;
+ /* other header types not restored at present */
+ }
+ }
+}
+
+/*
+ * Put the powerbook to sleep.
+ */
+#define IRQ_ENABLE ((unsigned int *)0xf3000024)
+#define MEM_CTRL ((unsigned int *)0xf8000070)
+
+int __openfirmware powerbook_sleep(void)
+{
+ int ret, i, x;
+ static int save_backlight;
+ static unsigned int save_irqen;
+ unsigned long msr;
+ unsigned int hid0;
+ unsigned long p, wait;
+ struct adb_request sleep_req;
+
+ /* Notify device drivers */
+ ret = notifier_call_chain(&sleep_notifier_list, PBOOK_SLEEP, NULL);
+ if (ret & NOTIFY_STOP_MASK)
+ return -EBUSY;
+
+ /* Sync the disks. */
+ /* XXX It would be nice to have some way to ensure that
+ * nobody is dirtying any new buffers while we wait. */
+ fsync_dev(0);
+
+ /* Turn off the display backlight */
+ save_backlight = backlight_enabled;
+ if (save_backlight)
+ pmu_enable_backlight(0);
+
+ /* Give the disks a little time to actually finish writing */
+ for (wait = jiffies + (HZ/4); time_before(jiffies, wait); )
+ mb();
+
+ /* Disable all interrupts except pmu */
+ save_irqen = in_le32(IRQ_ENABLE);
+ for (i = 0; i < 32; ++i)
+ if (i != vias->intrs[0].line && (save_irqen & (1 << i)))
+ disable_irq(i);
+ asm volatile("mtdec %0" : : "r" (0x7fffffff));
+
+ /* Save the state of PCI config space for some slots */
+ pbook_pci_save();
+
+ /* Set the memory controller to keep the memory refreshed
+ while we're asleep */
+ for (i = 0x403f; i >= 0x4000; --i) {
+ out_be32(MEM_CTRL, i);
+ do {
+ x = (in_be32(MEM_CTRL) >> 16) & 0x3ff;
+ } while (x == 0);
+ if (x >= 0x100)
+ break;
+ }
+
+ /* Ask the PMU to put us to sleep */
+ pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
+ while (!sleep_req.complete)
+ mb();
+ /* displacement-flush the L2 cache - necessary? */
+ for (p = KERNELBASE; p < KERNELBASE + 0x100000; p += 0x1000)
+ i = *(volatile int *)p;
+ asleep = 1;
+
+ /* Put the CPU into sleep mode */
+ asm volatile("mfspr %0,1008" : "=r" (hid0) :);
+ hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
+ asm volatile("mtspr 1008,%0" : : "r" (hid0));
+ save_flags(msr);
+ msr |= MSR_POW | MSR_EE;
+ restore_flags(msr);
+ udelay(10);
+
+ /* OK, we're awake again, start restoring things */
+ out_be32(MEM_CTRL, 0x3f);
+ pbook_pci_restore();
+
+ /* wait for the PMU interrupt sequence to complete */
+ while (asleep)
+ mb();
+
+ /* reenable interrupts */
+ for (i = 0; i < 32; ++i)
+ if (i != vias->intrs[0].line && (save_irqen & (1 << i)))
+ enable_irq(i);
+
+ /* Notify drivers */
+ notifier_call_chain(&sleep_notifier_list, PBOOK_WAKE, NULL);
+
+ /* reenable ADB autopoll */
+ pmu_adb_autopoll(adb_dev_map);
+
+ /* Turn on the screen backlight, if it was on before */
+ if (save_backlight)
+ pmu_enable_backlight(1);
+
+ /* Wait for the hard disk to spin up */
+
+ return 0;
+}
+
+/*
+ * Support for /dev/pmu device
+ */
+static int __openfirmware pmu_open(struct inode *inode, struct file *file)
+{
+ return 0;
+}
+
+static ssize_t __openfirmware pmu_read(struct file *file, char *buf,
+ size_t count, loff_t *ppos)
+{
+ return 0;
+}
+
+static ssize_t __openfirmware pmu_write(struct file *file, const char *buf,
+ size_t count, loff_t *ppos)
+{
+ return 0;
+}
+
+/* Note: removed __openfirmware here since it causes link errors */
+static int /*__openfirmware*/ pmu_ioctl(struct inode * inode, struct file *filp,
+ u_int cmd, u_long arg)
+{
+ int error;
+ __u32 value;
+
+ switch (cmd) {
+ case PMU_IOC_SLEEP:
+ return -ENOSYS;
+ case PMU_IOC_GET_BACKLIGHT:
+ return put_user(backlight_level, (__u32 *)arg);
+ case PMU_IOC_SET_BACKLIGHT:
+ error = get_user(value, (__u32 *)arg);
+ if (!error)
+ pmu_set_brightness(value);
+ return error;
+ case PMU_IOC_GET_MODEL:
+ return put_user(pmu_kind, (__u32 *)arg);
+ }
+ return -EINVAL;
+}
+
+static struct file_operations pmu_device_fops = {
+ NULL, /* no seek */
+ pmu_read,
+ pmu_write,
+ NULL, /* no readdir */
+ NULL, /* no poll yet */
+ pmu_ioctl,
+ NULL, /* no mmap */
+ pmu_open,
+ NULL, /* flush */
+ NULL /* no release */
+};
+
+static struct miscdevice pmu_device = {
+ PMU_MINOR, "pmu", &pmu_device_fops
+};
+
+void pmu_device_init(void)
+{
+ if (via)
+ misc_register(&pmu_device);
+}
+#endif /* CONFIG_PMAC_PBOOK */
+
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)