diff options
Diffstat (limited to 'drivers/macintosh/via-pmu68k.c')
| -rw-r--r-- | drivers/macintosh/via-pmu68k.c | 1063 |
1 files changed, 1063 insertions, 0 deletions
diff --git a/drivers/macintosh/via-pmu68k.c b/drivers/macintosh/via-pmu68k.c new file mode 100644 index 00000000000..820dc52e30b --- /dev/null +++ b/drivers/macintosh/via-pmu68k.c @@ -0,0 +1,1063 @@ +/* + * 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/sched.h> +#include <linux/miscdevice.h> +#include <linux/blkdev.h> +#include <linux/pci.h> +#include <linux/slab.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/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 irqreturn_t 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); +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, 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; + 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, NULL); + } + if (via1[IFR] & CB1_INT) { + via1[IFR] = CB1_INT; + pmu_interrupt(IRQ_MAC_ADB_CL, NULL, NULL); + } + local_irq_restore(flags); +} + +static irqreturn_t +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 + 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, 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)) + +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); +} + +#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 = NULL; + struct pci_save *ps; + + npci = 0; + while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) + ++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; + + pd = NULL; + while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) { + 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 = NULL; + int j; + + while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) { + 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. */ + sys_sync(); + + /* 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)); + local_save_flags(msr); + msr |= MSR_POW | MSR_EE; + local_irq_restore(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 = { + .read = pmu_read, + .write = pmu_write, + .ioctl = pmu_ioctl, + .open = pmu_open, +}; + +static struct miscdevice pmu_device = { + PMU_MINOR, "pmu", &pmu_device_fops +}; + +void pmu_device_init(void) +{ + if (!via) + return; + if (misc_register(&pmu_device) < 0) + printk(KERN_ERR "via-pmu68k: cannot register misc device.\n"); +} +#endif /* CONFIG_PMAC_PBOOK */ + |