uctrl.c
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上传日期:2013-04-10
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- /* $Id: uctrl.c,v 1.12 2001/10/08 22:19:51 davem Exp $
- * uctrl.c: TS102 Microcontroller interface on Tadpole Sparcbook 3
- *
- * Copyright 1999 Derrick J Brashear (shadow@dementia.org)
- */
- #include <linux/module.h>
- #include <linux/sched.h>
- #include <linux/errno.h>
- #include <linux/delay.h>
- #include <linux/interrupt.h>
- #include <linux/slab.h>
- #include <linux/ioport.h>
- #include <linux/init.h>
- #include <linux/miscdevice.h>
- #include <linux/mm.h>
- #include <asm/openprom.h>
- #include <asm/oplib.h>
- #include <asm/system.h>
- #include <asm/irq.h>
- #include <asm/io.h>
- #include <asm/pgtable.h>
- #include <asm/sbus.h>
- #define UCTRL_MINOR 174
- #define DEBUG 1
- #ifdef DEBUG
- #define dprintk(x) printk x
- #else
- #define dprintk(x)
- #endif
- struct uctrl_regs {
- volatile u32 uctrl_intr;
- volatile u32 uctrl_data;
- volatile u32 uctrl_stat;
- volatile u32 uctrl_xxx[5];
- };
- struct ts102_regs {
- volatile u32 card_a_intr;
- volatile u32 card_a_stat;
- volatile u32 card_a_ctrl;
- volatile u32 card_a_xxx;
- volatile u32 card_b_intr;
- volatile u32 card_b_stat;
- volatile u32 card_b_ctrl;
- volatile u32 card_b_xxx;
- volatile u32 uctrl_intr;
- volatile u32 uctrl_data;
- volatile u32 uctrl_stat;
- volatile u32 uctrl_xxx;
- volatile u32 ts102_xxx[4];
- };
- /* Bits for uctrl_intr register */
- #define UCTRL_INTR_TXE_REQ 0x01 /* transmit FIFO empty int req */
- #define UCTRL_INTR_TXNF_REQ 0x02 /* transmit FIFO not full int req */
- #define UCTRL_INTR_RXNE_REQ 0x04 /* receive FIFO not empty int req */
- #define UCTRL_INTR_RXO_REQ 0x08 /* receive FIFO overflow int req */
- #define UCTRL_INTR_TXE_MSK 0x10 /* transmit FIFO empty mask */
- #define UCTRL_INTR_TXNF_MSK 0x20 /* transmit FIFO not full mask */
- #define UCTRL_INTR_RXNE_MSK 0x40 /* receive FIFO not empty mask */
- #define UCTRL_INTR_RXO_MSK 0x80 /* receive FIFO overflow mask */
- /* Bits for uctrl_stat register */
- #define UCTRL_STAT_TXE_STA 0x01 /* transmit FIFO empty status */
- #define UCTRL_STAT_TXNF_STA 0x02 /* transmit FIFO not full status */
- #define UCTRL_STAT_RXNE_STA 0x04 /* receive FIFO not empty status */
- #define UCTRL_STAT_RXO_STA 0x08 /* receive FIFO overflow status */
- static const char *uctrl_extstatus[16] = {
- "main power available",
- "internal battery attached",
- "external battery attached",
- "external VGA attached",
- "external keyboard attached",
- "external mouse attached",
- "lid down",
- "internal battery currently charging",
- "external battery currently charging",
- "internal battery currently discharging",
- "external battery currently discharging",
- };
- /* Everything required for one transaction with the uctrl */
- struct uctrl_txn {
- u8 opcode;
- u8 inbits;
- u8 outbits;
- u8 *inbuf;
- u8 *outbuf;
- };
- struct uctrl_status {
- u8 current_temp; /* 0x07 */
- u8 reset_status; /* 0x0b */
- u16 event_status; /* 0x0c */
- u16 error_status; /* 0x10 */
- u16 external_status; /* 0x11, 0x1b */
- u8 internal_charge; /* 0x18 */
- u8 external_charge; /* 0x19 */
- u16 control_lcd; /* 0x20 */
- u8 control_bitport; /* 0x21 */
- u8 speaker_volume; /* 0x23 */
- u8 control_tft_brightness; /* 0x24 */
- u8 control_kbd_repeat_delay; /* 0x28 */
- u8 control_kbd_repeat_rate; /* 0x29 */
- u8 control_screen_contrast; /* 0x2F */
- };
- enum uctrl_opcode {
- READ_SERIAL_NUMBER=0x1,
- READ_ETHERNET_ADDRESS=0x2,
- READ_HARDWARE_VERSION=0x3,
- READ_MICROCONTROLLER_VERSION=0x4,
- READ_MAX_TEMPERATURE=0x5,
- READ_MIN_TEMPERATURE=0x6,
- READ_CURRENT_TEMPERATURE=0x7,
- READ_SYSTEM_VARIANT=0x8,
- READ_POWERON_CYCLES=0x9,
- READ_POWERON_SECONDS=0xA,
- READ_RESET_STATUS=0xB,
- READ_EVENT_STATUS=0xC,
- READ_REAL_TIME_CLOCK=0xD,
- READ_EXTERNAL_VGA_PORT=0xE,
- READ_MICROCONTROLLER_ROM_CHECKSUM=0xF,
- READ_ERROR_STATUS=0x10,
- READ_EXTERNAL_STATUS=0x11,
- READ_USER_CONFIGURATION_AREA=0x12,
- READ_MICROCONTROLLER_VOLTAGE=0x13,
- READ_INTERNAL_BATTERY_VOLTAGE=0x14,
- READ_DCIN_VOLTAGE=0x15,
- READ_HORIZONTAL_POINTER_VOLTAGE=0x16,
- READ_VERTICAL_POINTER_VOLTAGE=0x17,
- READ_INTERNAL_BATTERY_CHARGE_LEVEL=0x18,
- READ_EXTERNAL_BATTERY_CHARGE_LEVEL=0x19,
- READ_REAL_TIME_CLOCK_ALARM=0x1A,
- READ_EVENT_STATUS_NO_RESET=0x1B,
- READ_INTERNAL_KEYBOARD_LAYOUT=0x1C,
- READ_EXTERNAL_KEYBOARD_LAYOUT=0x1D,
- READ_EEPROM_STATUS=0x1E,
- CONTROL_LCD=0x20,
- CONTROL_BITPORT=0x21,
- SPEAKER_VOLUME=0x23,
- CONTROL_TFT_BRIGHTNESS=0x24,
- CONTROL_WATCHDOG=0x25,
- CONTROL_FACTORY_EEPROM_AREA=0x26,
- CONTROL_KBD_TIME_UNTIL_REPEAT=0x28,
- CONTROL_KBD_TIME_BETWEEN_REPEATS=0x29,
- CONTROL_TIMEZONE=0x2A,
- CONTROL_MARK_SPACE_RATIO=0x2B,
- CONTROL_DIAGNOSTIC_MODE=0x2E,
- CONTROL_SCREEN_CONTRAST=0x2F,
- RING_BELL=0x30,
- SET_DIAGNOSTIC_STATUS=0x32,
- CLEAR_KEY_COMBINATION_TABLE=0x33,
- PERFORM_SOFTWARE_RESET=0x34,
- SET_REAL_TIME_CLOCK=0x35,
- RECALIBRATE_POINTING_STICK=0x36,
- SET_BELL_FREQUENCY=0x37,
- SET_INTERNAL_BATTERY_CHARGE_RATE=0x39,
- SET_EXTERNAL_BATTERY_CHARGE_RATE=0x3A,
- SET_REAL_TIME_CLOCK_ALARM=0x3B,
- READ_EEPROM=0x40,
- WRITE_EEPROM=0x41,
- WRITE_TO_STATUS_DISPLAY=0x42,
- DEFINE_SPECIAL_CHARACTER=0x43,
- DEFINE_KEY_COMBINATION_ENTRY=0x50,
- DEFINE_STRING_TABLE_ENTRY=0x51,
- DEFINE_STATUS_SCREEN_DISPLAY=0x52,
- PERFORM_EMU_COMMANDS=0x64,
- READ_EMU_REGISTER=0x65,
- WRITE_EMU_REGISTER=0x66,
- READ_EMU_RAM=0x67,
- WRITE_EMU_RAM=0x68,
- READ_BQ_REGISTER=0x69,
- WRITE_BQ_REGISTER=0x6A,
- SET_USER_PASSWORD=0x70,
- VERIFY_USER_PASSWORD=0x71,
- GET_SYSTEM_PASSWORD_KEY=0x72,
- VERIFY_SYSTEM_PASSWORD=0x73,
- POWER_OFF=0x82,
- POWER_RESTART=0x83,
- };
- struct uctrl_driver {
- struct uctrl_regs *regs;
- int irq;
- int pending;
- struct uctrl_status status;
- };
- static struct uctrl_driver drv;
- void uctrl_get_event_status(void);
- void uctrl_get_external_status(void);
- static int
- uctrl_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
- {
- switch (cmd) {
- default:
- return -EINVAL;
- }
- return 0;
- }
- static int
- uctrl_open(struct inode *inode, struct file *file)
- {
- uctrl_get_event_status();
- uctrl_get_external_status();
- return 0;
- }
- void uctrl_interrupt(int irq, void *dev_id, struct pt_regs *regs)
- {
- struct uctrl_driver *driver = (struct uctrl_driver *)dev_id;
- printk("in uctrl_interruptn");
- }
- static struct file_operations uctrl_fops = {
- owner: THIS_MODULE,
- llseek: no_llseek,
- ioctl: uctrl_ioctl,
- open: uctrl_open,
- };
- static struct miscdevice uctrl_dev = {
- UCTRL_MINOR,
- "uctrl",
- &uctrl_fops
- };
- /* Wait for space to write, then write to it */
- #define WRITEUCTLDATA(value)
- {
- unsigned int i;
- for (i = 0; i < 10000; i++) {
- if (UCTRL_STAT_TXNF_STA & driver->regs->uctrl_stat)
- break;
- }
- dprintk(("write data 0x%02xn", value));
- driver->regs->uctrl_data = value;
- }
- /* Wait for something to read, read it, then clear the bit */
- #define READUCTLDATA(value)
- {
- unsigned int i;
- value = 0;
- for (i = 0; i < 10000; i++) {
- if ((UCTRL_STAT_RXNE_STA & driver->regs->uctrl_stat) == 0)
- break;
- udelay(1);
- }
- value = driver->regs->uctrl_data;
- dprintk(("read data 0x%02xn", value));
- driver->regs->uctrl_stat = UCTRL_STAT_RXNE_STA;
- }
- void uctrl_set_video(int status)
- {
- struct uctrl_driver *driver = &drv;
-
- }
- static void uctrl_do_txn(struct uctrl_txn *txn)
- {
- struct uctrl_driver *driver = &drv;
- int stat, incnt, outcnt, bytecnt, intr;
- u32 byte;
- stat = driver->regs->uctrl_stat;
- intr = driver->regs->uctrl_intr;
- driver->regs->uctrl_stat = stat;
- dprintk(("interrupt stat 0x%x int 0x%xn", stat, intr));
- incnt = txn->inbits;
- outcnt = txn->outbits;
- byte = (txn->opcode << 8);
- WRITEUCTLDATA(byte);
- bytecnt = 0;
- while (incnt > 0) {
- byte = (txn->inbuf[bytecnt] << 8);
- WRITEUCTLDATA(byte);
- incnt--;
- bytecnt++;
- }
- /* Get the ack */
- READUCTLDATA(byte);
- dprintk(("ack was %xn", (byte >> 8)));
- bytecnt = 0;
- while (outcnt > 0) {
- READUCTLDATA(byte);
- txn->outbuf[bytecnt] = (byte >> 8);
- dprintk(("set byte to %02xn", byte));
- outcnt--;
- bytecnt++;
- }
- }
- void uctrl_get_event_status()
- {
- struct uctrl_driver *driver = &drv;
- struct uctrl_txn txn;
- u8 outbits[2];
- txn.opcode = READ_EVENT_STATUS;
- txn.inbits = 0;
- txn.outbits = 2;
- txn.inbuf = 0;
- txn.outbuf = outbits;
- uctrl_do_txn(&txn);
- dprintk(("bytes %x %xn", (outbits[0] & 0xff), (outbits[1] & 0xff)));
- driver->status.event_status =
- ((outbits[0] & 0xff) << 8) | (outbits[1] & 0xff);
- dprintk(("ev is %xn", driver->status.event_status));
- }
- void uctrl_get_external_status()
- {
- struct uctrl_driver *driver = &drv;
- struct uctrl_txn txn;
- u8 outbits[2];
- int i, v;
- txn.opcode = READ_EXTERNAL_STATUS;
- txn.inbits = 0;
- txn.outbits = 2;
- txn.inbuf = 0;
- txn.outbuf = outbits;
- uctrl_do_txn(&txn);
- dprintk(("bytes %x %xn", (outbits[0] & 0xff), (outbits[1] & 0xff)));
- driver->status.external_status =
- ((outbits[0] * 256) + (outbits[1]));
- dprintk(("ex is %xn", driver->status.external_status));
- v = driver->status.external_status;
- for (i = 0; v != 0; i++, v >>= 1) {
- if (v & 1) {
- dprintk(("%s%s", " ", uctrl_extstatus[i]));
- }
- }
- dprintk(("n"));
-
- }
- static int __init ts102_uctrl_init(void)
- {
- struct uctrl_driver *driver = &drv;
- int len, i;
- struct linux_prom_irqs tmp_irq[2];
- unsigned int vaddr[2] = { 0, 0 };
- int tmpnode, uctrlnode = prom_getchild(prom_root_node);
- tmpnode = prom_searchsiblings(uctrlnode, "obio");
- if (tmpnode)
- uctrlnode = prom_getchild(tmpnode);
- uctrlnode = prom_searchsiblings(uctrlnode, "uctrl");
- if (!uctrlnode)
- return -ENODEV;
- /* the prom mapped it for us */
- len = prom_getproperty(uctrlnode, "address", (void *) vaddr,
- sizeof(vaddr));
- driver->regs = (struct uctrl_regs *)vaddr[0];
- len = prom_getproperty(uctrlnode, "intr", (char *) tmp_irq,
- sizeof(tmp_irq));
- /* Flush device */
- READUCTLDATA(len);
- if(!driver->irq)
- driver->irq = tmp_irq[0].pri;
- request_irq(driver->irq, uctrl_interrupt, 0, "uctrl", driver);
- if (misc_register(&uctrl_dev)) {
- printk("%s: unable to get misc minor %dn",
- __FUNCTION__, uctrl_dev.minor);
- free_irq(driver->irq, driver);
- return -ENODEV;
- }
- driver->regs->uctrl_intr = UCTRL_INTR_RXNE_REQ|UCTRL_INTR_RXNE_MSK;
- printk("uctrl: 0x%x (irq %s)n", driver->regs, __irq_itoa(driver->irq));
- uctrl_get_event_status();
- uctrl_get_external_status();
- return 0;
- }
- static void __exit ts102_uctrl_cleanup(void)
- {
- struct uctrl_driver *driver = &drv;
- misc_deregister(&uctrl_dev);
- if (driver->irq)
- free_irq(driver->irq, driver);
- if (driver->regs)
- driver->regs = 0;
- }
- module_init(ts102_uctrl_init);
- module_exit(ts102_uctrl_cleanup);
- MODULE_LICENSE("GPL");