Lines Matching refs:i2c
198 #define _IBMR(i2c) ((i2c)->reg_ibmr) argument
199 #define _IDBR(i2c) ((i2c)->reg_idbr) argument
200 #define _ICR(i2c) ((i2c)->reg_icr) argument
201 #define _ISR(i2c) ((i2c)->reg_isr) argument
202 #define _ISAR(i2c) ((i2c)->reg_isar) argument
203 #define _ILCR(i2c) ((i2c)->reg_ilcr) argument
204 #define _IWCR(i2c) ((i2c)->reg_iwcr) argument
280 static void i2c_pxa_show_state(struct pxa_i2c *i2c, int lno, const char *fname) in i2c_pxa_show_state() argument
282 dev_dbg(&i2c->adap.dev, "state:%s:%d: ISR=%08x, ICR=%08x, IBMR=%02x\n", fname, lno, in i2c_pxa_show_state()
283 readl(_ISR(i2c)), readl(_ICR(i2c)), readl(_IBMR(i2c))); in i2c_pxa_show_state()
286 #define show_state(i2c) i2c_pxa_show_state(i2c, __LINE__, __func__) argument
288 static void i2c_pxa_scream_blue_murder(struct pxa_i2c *i2c, const char *why) in i2c_pxa_scream_blue_murder() argument
291 struct device *dev = &i2c->adap.dev; in i2c_pxa_scream_blue_murder()
294 i2c->req_slave_addr >> 1, why); in i2c_pxa_scream_blue_murder()
296 i2c->msg_num, i2c->msg_idx, i2c->msg_ptr); in i2c_pxa_scream_blue_murder()
298 readl(_IBMR(i2c)), readl(_IDBR(i2c)), readl(_ICR(i2c)), in i2c_pxa_scream_blue_murder()
299 readl(_ISR(i2c))); in i2c_pxa_scream_blue_murder()
301 for (i = 0; i < i2c->irqlogidx; i++) in i2c_pxa_scream_blue_murder()
302 pr_debug("[%08x:%08x] ", i2c->isrlog[i], i2c->icrlog[i]); in i2c_pxa_scream_blue_murder()
311 #define show_state(i2c) do { } while (0) argument
314 #define i2c_pxa_scream_blue_murder(i2c, why) do { } while (0) argument
318 static void i2c_pxa_master_complete(struct pxa_i2c *i2c, int ret);
321 static inline int i2c_pxa_is_slavemode(struct pxa_i2c *i2c) in i2c_pxa_is_slavemode() argument
323 return !(readl(_ICR(i2c)) & ICR_SCLE); in i2c_pxa_is_slavemode()
326 static void i2c_pxa_abort(struct pxa_i2c *i2c) in i2c_pxa_abort() argument
330 if (i2c_pxa_is_slavemode(i2c)) { in i2c_pxa_abort()
331 dev_dbg(&i2c->adap.dev, "%s: called in slave mode\n", __func__); in i2c_pxa_abort()
335 while ((i > 0) && (readl(_IBMR(i2c)) & 0x1) == 0) { in i2c_pxa_abort()
336 unsigned long icr = readl(_ICR(i2c)); in i2c_pxa_abort()
341 writel(icr, _ICR(i2c)); in i2c_pxa_abort()
343 show_state(i2c); in i2c_pxa_abort()
349 writel(readl(_ICR(i2c)) & ~(ICR_MA | ICR_START | ICR_STOP), in i2c_pxa_abort()
350 _ICR(i2c)); in i2c_pxa_abort()
353 static int i2c_pxa_wait_bus_not_busy(struct pxa_i2c *i2c) in i2c_pxa_wait_bus_not_busy() argument
357 while (timeout-- && readl(_ISR(i2c)) & (ISR_IBB | ISR_UB)) { in i2c_pxa_wait_bus_not_busy()
358 if ((readl(_ISR(i2c)) & ISR_SAD) != 0) in i2c_pxa_wait_bus_not_busy()
362 show_state(i2c); in i2c_pxa_wait_bus_not_busy()
366 show_state(i2c); in i2c_pxa_wait_bus_not_busy()
371 static int i2c_pxa_wait_master(struct pxa_i2c *i2c) in i2c_pxa_wait_master() argument
377 dev_dbg(&i2c->adap.dev, "%s: %ld: ISR=%08x, ICR=%08x, IBMR=%02x\n", in i2c_pxa_wait_master()
378 __func__, (long)jiffies, readl(_ISR(i2c)), readl(_ICR(i2c)), readl(_IBMR(i2c))); in i2c_pxa_wait_master()
380 if (readl(_ISR(i2c)) & ISR_SAD) { in i2c_pxa_wait_master()
382 dev_dbg(&i2c->adap.dev, "%s: Slave detected\n", __func__); in i2c_pxa_wait_master()
390 if ((readl(_ISR(i2c)) & (ISR_UB | ISR_IBB)) == 0 && readl(_IBMR(i2c)) == 3) { in i2c_pxa_wait_master()
392 dev_dbg(&i2c->adap.dev, "%s: done\n", __func__); in i2c_pxa_wait_master()
400 dev_dbg(&i2c->adap.dev, "%s: did not free\n", __func__); in i2c_pxa_wait_master()
405 static int i2c_pxa_set_master(struct pxa_i2c *i2c) in i2c_pxa_set_master() argument
408 dev_dbg(&i2c->adap.dev, "setting to bus master\n"); in i2c_pxa_set_master()
410 if ((readl(_ISR(i2c)) & (ISR_UB | ISR_IBB)) != 0) { in i2c_pxa_set_master()
411 dev_dbg(&i2c->adap.dev, "%s: unit is busy\n", __func__); in i2c_pxa_set_master()
412 if (!i2c_pxa_wait_master(i2c)) { in i2c_pxa_set_master()
413 dev_dbg(&i2c->adap.dev, "%s: error: unit busy\n", __func__); in i2c_pxa_set_master()
418 writel(readl(_ICR(i2c)) | ICR_SCLE, _ICR(i2c)); in i2c_pxa_set_master()
423 static int i2c_pxa_wait_slave(struct pxa_i2c *i2c) in i2c_pxa_wait_slave() argument
429 show_state(i2c); in i2c_pxa_wait_slave()
433 dev_dbg(&i2c->adap.dev, "%s: %ld: ISR=%08x, ICR=%08x, IBMR=%02x\n", in i2c_pxa_wait_slave()
434 __func__, (long)jiffies, readl(_ISR(i2c)), readl(_ICR(i2c)), readl(_IBMR(i2c))); in i2c_pxa_wait_slave()
436 if ((readl(_ISR(i2c)) & (ISR_UB|ISR_IBB)) == 0 || in i2c_pxa_wait_slave()
437 (readl(_ISR(i2c)) & ISR_SAD) != 0 || in i2c_pxa_wait_slave()
438 (readl(_ICR(i2c)) & ICR_SCLE) == 0) { in i2c_pxa_wait_slave()
440 dev_dbg(&i2c->adap.dev, "%s: done\n", __func__); in i2c_pxa_wait_slave()
448 dev_dbg(&i2c->adap.dev, "%s: did not free\n", __func__); in i2c_pxa_wait_slave()
456 static void i2c_pxa_set_slave(struct pxa_i2c *i2c, int errcode) in i2c_pxa_set_slave() argument
458 show_state(i2c); in i2c_pxa_set_slave()
466 if (readl(_ICR(i2c)) & ICR_STOP) { in i2c_pxa_set_slave()
468 writel(readl(_ICR(i2c)) & ~ICR_STOP, _ICR(i2c)); in i2c_pxa_set_slave()
471 if (!i2c_pxa_wait_slave(i2c)) { in i2c_pxa_set_slave()
472 dev_err(&i2c->adap.dev, "%s: wait timedout\n", in i2c_pxa_set_slave()
478 writel(readl(_ICR(i2c)) & ~(ICR_STOP|ICR_ACKNAK|ICR_MA), _ICR(i2c)); in i2c_pxa_set_slave()
479 writel(readl(_ICR(i2c)) & ~ICR_SCLE, _ICR(i2c)); in i2c_pxa_set_slave()
482 dev_dbg(&i2c->adap.dev, "ICR now %08x, ISR %08x\n", readl(_ICR(i2c)), readl(_ISR(i2c))); in i2c_pxa_set_slave()
483 decode_ICR(readl(_ICR(i2c))); in i2c_pxa_set_slave()
487 #define i2c_pxa_set_slave(i2c, err) do { } while (0) argument
490 static void i2c_pxa_reset(struct pxa_i2c *i2c) in i2c_pxa_reset() argument
495 i2c_pxa_abort(i2c); in i2c_pxa_reset()
498 writel(ICR_UR, _ICR(i2c)); in i2c_pxa_reset()
499 writel(I2C_ISR_INIT, _ISR(i2c)); in i2c_pxa_reset()
500 writel(readl(_ICR(i2c)) & ~ICR_UR, _ICR(i2c)); in i2c_pxa_reset()
502 if (i2c->reg_isar && IS_ENABLED(CONFIG_I2C_PXA_SLAVE)) in i2c_pxa_reset()
503 writel(i2c->slave_addr, _ISAR(i2c)); in i2c_pxa_reset()
506 writel(I2C_ICR_INIT | (i2c->fast_mode ? ICR_FM : 0), _ICR(i2c)); in i2c_pxa_reset()
507 writel(readl(_ICR(i2c)) | (i2c->high_mode ? ICR_HS : 0), _ICR(i2c)); in i2c_pxa_reset()
510 dev_info(&i2c->adap.dev, "Enabling slave mode\n"); in i2c_pxa_reset()
511 writel(readl(_ICR(i2c)) | ICR_SADIE | ICR_ALDIE | ICR_SSDIE, _ICR(i2c)); in i2c_pxa_reset()
514 i2c_pxa_set_slave(i2c, 0); in i2c_pxa_reset()
517 writel(readl(_ICR(i2c)) | ICR_IUE, _ICR(i2c)); in i2c_pxa_reset()
527 static void i2c_pxa_slave_txempty(struct pxa_i2c *i2c, u32 isr) in i2c_pxa_slave_txempty() argument
534 if (i2c->slave != NULL) in i2c_pxa_slave_txempty()
535 ret = i2c->slave->read(i2c->slave->data); in i2c_pxa_slave_txempty()
537 writel(ret, _IDBR(i2c)); in i2c_pxa_slave_txempty()
538 writel(readl(_ICR(i2c)) | ICR_TB, _ICR(i2c)); /* allow next byte */ in i2c_pxa_slave_txempty()
542 static void i2c_pxa_slave_rxfull(struct pxa_i2c *i2c, u32 isr) in i2c_pxa_slave_rxfull() argument
544 unsigned int byte = readl(_IDBR(i2c)); in i2c_pxa_slave_rxfull()
546 if (i2c->slave != NULL) in i2c_pxa_slave_rxfull()
547 i2c->slave->write(i2c->slave->data, byte); in i2c_pxa_slave_rxfull()
549 writel(readl(_ICR(i2c)) | ICR_TB, _ICR(i2c)); in i2c_pxa_slave_rxfull()
552 static void i2c_pxa_slave_start(struct pxa_i2c *i2c, u32 isr) in i2c_pxa_slave_start() argument
557 dev_dbg(&i2c->adap.dev, "SAD, mode is slave-%cx\n", in i2c_pxa_slave_start()
560 if (i2c->slave != NULL) in i2c_pxa_slave_start()
561 i2c->slave->event(i2c->slave->data, in i2c_pxa_slave_start()
569 writel(readl(_ICR(i2c)) & ~(ICR_START|ICR_STOP), _ICR(i2c)); in i2c_pxa_slave_start()
570 writel(readl(_ICR(i2c)) | ICR_TB, _ICR(i2c)); in i2c_pxa_slave_start()
575 if ((readl(_IBMR(i2c)) & 2) == 2) in i2c_pxa_slave_start()
581 dev_err(&i2c->adap.dev, "timeout waiting for SCL high\n"); in i2c_pxa_slave_start()
586 writel(readl(_ICR(i2c)) & ~ICR_SCLE, _ICR(i2c)); in i2c_pxa_slave_start()
589 static void i2c_pxa_slave_stop(struct pxa_i2c *i2c) in i2c_pxa_slave_stop() argument
592 dev_dbg(&i2c->adap.dev, "ISR: SSD (Slave Stop)\n"); in i2c_pxa_slave_stop()
594 if (i2c->slave != NULL) in i2c_pxa_slave_stop()
595 i2c->slave->event(i2c->slave->data, I2C_SLAVE_EVENT_STOP); in i2c_pxa_slave_stop()
598 dev_dbg(&i2c->adap.dev, "ISR: SSD (Slave Stop) acked\n"); in i2c_pxa_slave_stop()
604 if (i2c->msg) in i2c_pxa_slave_stop()
605 i2c_pxa_master_complete(i2c, I2C_RETRY); in i2c_pxa_slave_stop()
608 static void i2c_pxa_slave_txempty(struct pxa_i2c *i2c, u32 isr) in i2c_pxa_slave_txempty() argument
613 writel(0, _IDBR(i2c)); in i2c_pxa_slave_txempty()
614 writel(readl(_ICR(i2c)) | ICR_TB, _ICR(i2c)); in i2c_pxa_slave_txempty()
618 static void i2c_pxa_slave_rxfull(struct pxa_i2c *i2c, u32 isr) in i2c_pxa_slave_rxfull() argument
620 writel(readl(_ICR(i2c)) | ICR_TB | ICR_ACKNAK, _ICR(i2c)); in i2c_pxa_slave_rxfull()
623 static void i2c_pxa_slave_start(struct pxa_i2c *i2c, u32 isr) in i2c_pxa_slave_start() argument
632 writel(readl(_ICR(i2c)) & ~(ICR_START|ICR_STOP), _ICR(i2c)); in i2c_pxa_slave_start()
633 writel(readl(_ICR(i2c)) | ICR_TB | ICR_ACKNAK, _ICR(i2c)); in i2c_pxa_slave_start()
638 if ((readl(_IBMR(i2c)) & 2) == 2) in i2c_pxa_slave_start()
644 dev_err(&i2c->adap.dev, "timeout waiting for SCL high\n"); in i2c_pxa_slave_start()
649 writel(readl(_ICR(i2c)) & ~ICR_SCLE, _ICR(i2c)); in i2c_pxa_slave_start()
652 static void i2c_pxa_slave_stop(struct pxa_i2c *i2c) in i2c_pxa_slave_stop() argument
654 if (i2c->msg) in i2c_pxa_slave_stop()
655 i2c_pxa_master_complete(i2c, I2C_RETRY); in i2c_pxa_slave_stop()
673 static inline void i2c_pxa_start_message(struct pxa_i2c *i2c) in i2c_pxa_start_message() argument
680 writel(i2c_pxa_addr_byte(i2c->msg), _IDBR(i2c)); in i2c_pxa_start_message()
681 i2c->req_slave_addr = i2c_pxa_addr_byte(i2c->msg); in i2c_pxa_start_message()
686 icr = readl(_ICR(i2c)) & ~(ICR_STOP | ICR_ALDIE); in i2c_pxa_start_message()
687 writel(icr | ICR_START | ICR_TB, _ICR(i2c)); in i2c_pxa_start_message()
690 static inline void i2c_pxa_stop_message(struct pxa_i2c *i2c) in i2c_pxa_stop_message() argument
697 icr = readl(_ICR(i2c)); in i2c_pxa_stop_message()
699 writel(icr, _ICR(i2c)); in i2c_pxa_stop_message()
702 static int i2c_pxa_pio_set_master(struct pxa_i2c *i2c) in i2c_pxa_pio_set_master() argument
710 while (timeout-- && readl(_ISR(i2c)) & (ISR_IBB | ISR_UB)) { in i2c_pxa_pio_set_master()
712 show_state(i2c); in i2c_pxa_pio_set_master()
716 show_state(i2c); in i2c_pxa_pio_set_master()
717 dev_err(&i2c->adap.dev, in i2c_pxa_pio_set_master()
725 writel(readl(_ICR(i2c)) | ICR_SCLE, _ICR(i2c)); in i2c_pxa_pio_set_master()
736 static int i2c_pxa_send_mastercode(struct pxa_i2c *i2c) in i2c_pxa_send_mastercode() argument
741 spin_lock_irq(&i2c->lock); in i2c_pxa_send_mastercode()
742 i2c->highmode_enter = true; in i2c_pxa_send_mastercode()
743 writel(i2c->master_code, _IDBR(i2c)); in i2c_pxa_send_mastercode()
745 icr = readl(_ICR(i2c)) & ~(ICR_STOP | ICR_ALDIE); in i2c_pxa_send_mastercode()
747 writel(icr, _ICR(i2c)); in i2c_pxa_send_mastercode()
749 spin_unlock_irq(&i2c->lock); in i2c_pxa_send_mastercode()
750 timeout = wait_event_timeout(i2c->wait, in i2c_pxa_send_mastercode()
751 i2c->highmode_enter == false, HZ * 1); in i2c_pxa_send_mastercode()
753 i2c->highmode_enter = false; in i2c_pxa_send_mastercode()
758 static int i2c_pxa_do_pio_xfer(struct pxa_i2c *i2c, in i2c_pxa_do_pio_xfer() argument
764 ret = i2c_pxa_pio_set_master(i2c); in i2c_pxa_do_pio_xfer()
768 i2c->msg = msg; in i2c_pxa_do_pio_xfer()
769 i2c->msg_num = num; in i2c_pxa_do_pio_xfer()
770 i2c->msg_idx = 0; in i2c_pxa_do_pio_xfer()
771 i2c->msg_ptr = 0; in i2c_pxa_do_pio_xfer()
772 i2c->irqlogidx = 0; in i2c_pxa_do_pio_xfer()
774 i2c_pxa_start_message(i2c); in i2c_pxa_do_pio_xfer()
776 while (i2c->msg_num > 0 && --timeout) { in i2c_pxa_do_pio_xfer()
777 i2c_pxa_handler(0, i2c); in i2c_pxa_do_pio_xfer()
781 i2c_pxa_stop_message(i2c); in i2c_pxa_do_pio_xfer()
786 ret = i2c->msg_idx; in i2c_pxa_do_pio_xfer()
790 i2c_pxa_scream_blue_murder(i2c, "timeout"); in i2c_pxa_do_pio_xfer()
800 static int i2c_pxa_do_xfer(struct pxa_i2c *i2c, struct i2c_msg *msg, int num) in i2c_pxa_do_xfer() argument
808 ret = i2c_pxa_wait_bus_not_busy(i2c); in i2c_pxa_do_xfer()
810 dev_err(&i2c->adap.dev, "i2c_pxa: timeout waiting for bus free\n"); in i2c_pxa_do_xfer()
817 ret = i2c_pxa_set_master(i2c); in i2c_pxa_do_xfer()
819 dev_err(&i2c->adap.dev, "i2c_pxa_set_master: error %d\n", ret); in i2c_pxa_do_xfer()
823 if (i2c->high_mode) { in i2c_pxa_do_xfer()
824 ret = i2c_pxa_send_mastercode(i2c); in i2c_pxa_do_xfer()
826 dev_err(&i2c->adap.dev, "i2c_pxa_send_mastercode timeout\n"); in i2c_pxa_do_xfer()
831 spin_lock_irq(&i2c->lock); in i2c_pxa_do_xfer()
833 i2c->msg = msg; in i2c_pxa_do_xfer()
834 i2c->msg_num = num; in i2c_pxa_do_xfer()
835 i2c->msg_idx = 0; in i2c_pxa_do_xfer()
836 i2c->msg_ptr = 0; in i2c_pxa_do_xfer()
837 i2c->irqlogidx = 0; in i2c_pxa_do_xfer()
839 i2c_pxa_start_message(i2c); in i2c_pxa_do_xfer()
841 spin_unlock_irq(&i2c->lock); in i2c_pxa_do_xfer()
846 timeout = wait_event_timeout(i2c->wait, i2c->msg_num == 0, HZ * 5); in i2c_pxa_do_xfer()
847 i2c_pxa_stop_message(i2c); in i2c_pxa_do_xfer()
852 ret = i2c->msg_idx; in i2c_pxa_do_xfer()
854 if (!timeout && i2c->msg_num) { in i2c_pxa_do_xfer()
855 i2c_pxa_scream_blue_murder(i2c, "timeout"); in i2c_pxa_do_xfer()
866 struct pxa_i2c *i2c = adap->algo_data; in i2c_pxa_pio_xfer() local
873 if (!(readl(_ICR(i2c)) & ICR_IUE)) in i2c_pxa_pio_xfer()
874 i2c_pxa_reset(i2c); in i2c_pxa_pio_xfer()
877 ret = i2c_pxa_do_pio_xfer(i2c, msgs, num); in i2c_pxa_pio_xfer()
885 i2c_pxa_scream_blue_murder(i2c, "exhausted retries"); in i2c_pxa_pio_xfer()
888 i2c_pxa_set_slave(i2c, ret); in i2c_pxa_pio_xfer()
895 static void i2c_pxa_master_complete(struct pxa_i2c *i2c, int ret) in i2c_pxa_master_complete() argument
897 i2c->msg_ptr = 0; in i2c_pxa_master_complete()
898 i2c->msg = NULL; in i2c_pxa_master_complete()
899 i2c->msg_idx ++; in i2c_pxa_master_complete()
900 i2c->msg_num = 0; in i2c_pxa_master_complete()
902 i2c->msg_idx = ret; in i2c_pxa_master_complete()
903 if (!i2c->use_pio) in i2c_pxa_master_complete()
904 wake_up(&i2c->wait); in i2c_pxa_master_complete()
907 static void i2c_pxa_irq_txempty(struct pxa_i2c *i2c, u32 isr) in i2c_pxa_irq_txempty() argument
909 u32 icr = readl(_ICR(i2c)) & ~(ICR_START|ICR_STOP|ICR_ACKNAK|ICR_TB); in i2c_pxa_irq_txempty()
920 i2c_pxa_scream_blue_murder(i2c, "ALD set"); in i2c_pxa_irq_txempty()
932 (!((i2c->msg->flags & I2C_M_IGNORE_NAK) && in i2c_pxa_irq_txempty()
942 if (i2c->msg_ptr == 0 && i2c->msg_idx == 0) in i2c_pxa_irq_txempty()
947 i2c_pxa_master_complete(i2c, ret); in i2c_pxa_irq_txempty()
953 if (i2c->msg_ptr == i2c->msg->len - 1 && in i2c_pxa_irq_txempty()
954 i2c->msg_idx == i2c->msg_num - 1) in i2c_pxa_irq_txempty()
958 } else if (i2c->msg_ptr < i2c->msg->len) { in i2c_pxa_irq_txempty()
962 writel(i2c->msg->buf[i2c->msg_ptr++], _IDBR(i2c)); in i2c_pxa_irq_txempty()
970 if ((i2c->msg_ptr == i2c->msg->len) && in i2c_pxa_irq_txempty()
971 ((i2c->msg->flags & I2C_M_STOP) || in i2c_pxa_irq_txempty()
972 (i2c->msg_idx == i2c->msg_num - 1))) in i2c_pxa_irq_txempty()
975 } else if (i2c->msg_idx < i2c->msg_num - 1) { in i2c_pxa_irq_txempty()
979 i2c->msg_ptr = 0; in i2c_pxa_irq_txempty()
980 i2c->msg_idx ++; in i2c_pxa_irq_txempty()
981 i2c->msg++; in i2c_pxa_irq_txempty()
988 if (i2c->msg->flags & I2C_M_NOSTART) in i2c_pxa_irq_txempty()
994 writel(i2c_pxa_addr_byte(i2c->msg), _IDBR(i2c)); in i2c_pxa_irq_txempty()
995 i2c->req_slave_addr = i2c_pxa_addr_byte(i2c->msg); in i2c_pxa_irq_txempty()
1003 if (i2c->msg->len == 0) { in i2c_pxa_irq_txempty()
1009 i2c_pxa_reset(i2c); in i2c_pxa_irq_txempty()
1011 i2c_pxa_master_complete(i2c, 0); in i2c_pxa_irq_txempty()
1014 i2c->icrlog[i2c->irqlogidx-1] = icr; in i2c_pxa_irq_txempty()
1016 writel(icr, _ICR(i2c)); in i2c_pxa_irq_txempty()
1017 show_state(i2c); in i2c_pxa_irq_txempty()
1020 static void i2c_pxa_irq_rxfull(struct pxa_i2c *i2c, u32 isr) in i2c_pxa_irq_rxfull() argument
1022 u32 icr = readl(_ICR(i2c)) & ~(ICR_START|ICR_STOP|ICR_ACKNAK|ICR_TB); in i2c_pxa_irq_rxfull()
1027 i2c->msg->buf[i2c->msg_ptr++] = readl(_IDBR(i2c)); in i2c_pxa_irq_rxfull()
1029 if (i2c->msg_ptr < i2c->msg->len) { in i2c_pxa_irq_rxfull()
1034 if (i2c->msg_ptr == i2c->msg->len - 1) in i2c_pxa_irq_rxfull()
1039 i2c_pxa_master_complete(i2c, 0); in i2c_pxa_irq_rxfull()
1042 i2c->icrlog[i2c->irqlogidx-1] = icr; in i2c_pxa_irq_rxfull()
1044 writel(icr, _ICR(i2c)); in i2c_pxa_irq_rxfull()
1051 struct pxa_i2c *i2c = dev_id; in i2c_pxa_handler() local
1052 u32 isr = readl(_ISR(i2c)); in i2c_pxa_handler()
1058 dev_dbg(&i2c->adap.dev, "%s: ISR=%08x, ICR=%08x, IBMR=%02x\n", in i2c_pxa_handler()
1059 __func__, isr, readl(_ICR(i2c)), readl(_IBMR(i2c))); in i2c_pxa_handler()
1063 if (i2c->irqlogidx < ARRAY_SIZE(i2c->isrlog)) in i2c_pxa_handler()
1064 i2c->isrlog[i2c->irqlogidx++] = isr; in i2c_pxa_handler()
1066 show_state(i2c); in i2c_pxa_handler()
1071 writel(isr & VALID_INT_SOURCE, _ISR(i2c)); in i2c_pxa_handler()
1074 i2c_pxa_slave_start(i2c, isr); in i2c_pxa_handler()
1076 i2c_pxa_slave_stop(i2c); in i2c_pxa_handler()
1078 if (i2c_pxa_is_slavemode(i2c)) { in i2c_pxa_handler()
1080 i2c_pxa_slave_txempty(i2c, isr); in i2c_pxa_handler()
1082 i2c_pxa_slave_rxfull(i2c, isr); in i2c_pxa_handler()
1083 } else if (i2c->msg && (!i2c->highmode_enter)) { in i2c_pxa_handler()
1085 i2c_pxa_irq_txempty(i2c, isr); in i2c_pxa_handler()
1087 i2c_pxa_irq_rxfull(i2c, isr); in i2c_pxa_handler()
1088 } else if ((isr & ISR_ITE) && i2c->highmode_enter) { in i2c_pxa_handler()
1089 i2c->highmode_enter = false; in i2c_pxa_handler()
1090 wake_up(&i2c->wait); in i2c_pxa_handler()
1092 i2c_pxa_scream_blue_murder(i2c, "spurious irq"); in i2c_pxa_handler()
1101 struct pxa_i2c *i2c = adap->algo_data; in i2c_pxa_xfer() local
1105 ret = i2c_pxa_do_xfer(i2c, msgs, num); in i2c_pxa_xfer()
1113 i2c_pxa_scream_blue_murder(i2c, "exhausted retries"); in i2c_pxa_xfer()
1116 i2c_pxa_set_slave(i2c, ret); in i2c_pxa_xfer()
1144 static int i2c_pxa_probe_dt(struct platform_device *pdev, struct pxa_i2c *i2c, in i2c_pxa_probe_dt() argument
1155 i2c->adap.nr = -1; in i2c_pxa_probe_dt()
1158 i2c->use_pio = 1; in i2c_pxa_probe_dt()
1160 i2c->fast_mode = 1; in i2c_pxa_probe_dt()
1168 struct pxa_i2c *i2c, in i2c_pxa_probe_pdata() argument
1176 i2c->use_pio = plat->use_pio; in i2c_pxa_probe_pdata()
1177 i2c->fast_mode = plat->fast_mode; in i2c_pxa_probe_pdata()
1178 i2c->high_mode = plat->high_mode; in i2c_pxa_probe_pdata()
1179 i2c->master_code = plat->master_code; in i2c_pxa_probe_pdata()
1180 if (!i2c->master_code) in i2c_pxa_probe_pdata()
1181 i2c->master_code = 0xe; in i2c_pxa_probe_pdata()
1182 i2c->rate = plat->rate; in i2c_pxa_probe_pdata()
1191 struct pxa_i2c *i2c; in i2c_pxa_probe() local
1195 i2c = devm_kzalloc(&dev->dev, sizeof(struct pxa_i2c), GFP_KERNEL); in i2c_pxa_probe()
1196 if (!i2c) in i2c_pxa_probe()
1200 i2c->reg_base = devm_ioremap_resource(&dev->dev, res); in i2c_pxa_probe()
1201 if (IS_ERR(i2c->reg_base)) in i2c_pxa_probe()
1202 return PTR_ERR(i2c->reg_base); in i2c_pxa_probe()
1211 i2c->adap.nr = dev->id; in i2c_pxa_probe()
1213 ret = i2c_pxa_probe_dt(dev, i2c, &i2c_type); in i2c_pxa_probe()
1215 ret = i2c_pxa_probe_pdata(dev, i2c, &i2c_type); in i2c_pxa_probe()
1219 i2c->adap.owner = THIS_MODULE; in i2c_pxa_probe()
1220 i2c->adap.retries = 5; in i2c_pxa_probe()
1222 spin_lock_init(&i2c->lock); in i2c_pxa_probe()
1223 init_waitqueue_head(&i2c->wait); in i2c_pxa_probe()
1225 strlcpy(i2c->adap.name, "pxa_i2c-i2c", sizeof(i2c->adap.name)); in i2c_pxa_probe()
1227 i2c->clk = devm_clk_get(&dev->dev, NULL); in i2c_pxa_probe()
1228 if (IS_ERR(i2c->clk)) { in i2c_pxa_probe()
1229 dev_err(&dev->dev, "failed to get the clk: %ld\n", PTR_ERR(i2c->clk)); in i2c_pxa_probe()
1230 return PTR_ERR(i2c->clk); in i2c_pxa_probe()
1233 i2c->reg_ibmr = i2c->reg_base + pxa_reg_layout[i2c_type].ibmr; in i2c_pxa_probe()
1234 i2c->reg_idbr = i2c->reg_base + pxa_reg_layout[i2c_type].idbr; in i2c_pxa_probe()
1235 i2c->reg_icr = i2c->reg_base + pxa_reg_layout[i2c_type].icr; in i2c_pxa_probe()
1236 i2c->reg_isr = i2c->reg_base + pxa_reg_layout[i2c_type].isr; in i2c_pxa_probe()
1238 i2c->reg_isar = i2c->reg_base + pxa_reg_layout[i2c_type].isar; in i2c_pxa_probe()
1241 i2c->reg_ilcr = i2c->reg_base + pxa_reg_layout[i2c_type].ilcr; in i2c_pxa_probe()
1242 i2c->reg_iwcr = i2c->reg_base + pxa_reg_layout[i2c_type].iwcr; in i2c_pxa_probe()
1245 i2c->iobase = res->start; in i2c_pxa_probe()
1246 i2c->iosize = resource_size(res); in i2c_pxa_probe()
1248 i2c->irq = irq; in i2c_pxa_probe()
1250 i2c->slave_addr = I2C_PXA_SLAVE_ADDR; in i2c_pxa_probe()
1251 i2c->highmode_enter = false; in i2c_pxa_probe()
1255 i2c->slave_addr = plat->slave_addr; in i2c_pxa_probe()
1256 i2c->slave = plat->slave; in i2c_pxa_probe()
1258 i2c->adap.class = plat->class; in i2c_pxa_probe()
1261 if (i2c->high_mode) { in i2c_pxa_probe()
1262 if (i2c->rate) { in i2c_pxa_probe()
1263 clk_set_rate(i2c->clk, i2c->rate); in i2c_pxa_probe()
1265 i2c->adap.name, clk_get_rate(i2c->clk)); in i2c_pxa_probe()
1268 i2c->adap.name); in i2c_pxa_probe()
1271 clk_prepare_enable(i2c->clk); in i2c_pxa_probe()
1273 if (i2c->use_pio) { in i2c_pxa_probe()
1274 i2c->adap.algo = &i2c_pxa_pio_algorithm; in i2c_pxa_probe()
1276 i2c->adap.algo = &i2c_pxa_algorithm; in i2c_pxa_probe()
1279 dev_name(&dev->dev), i2c); in i2c_pxa_probe()
1286 i2c_pxa_reset(i2c); in i2c_pxa_probe()
1288 i2c->adap.algo_data = i2c; in i2c_pxa_probe()
1289 i2c->adap.dev.parent = &dev->dev; in i2c_pxa_probe()
1291 i2c->adap.dev.of_node = dev->dev.of_node; in i2c_pxa_probe()
1294 ret = i2c_add_numbered_adapter(&i2c->adap); in i2c_pxa_probe()
1298 platform_set_drvdata(dev, i2c); in i2c_pxa_probe()
1301 dev_info(&i2c->adap.dev, " PXA I2C adapter, slave address %d\n", in i2c_pxa_probe()
1302 i2c->slave_addr); in i2c_pxa_probe()
1304 dev_info(&i2c->adap.dev, " PXA I2C adapter\n"); in i2c_pxa_probe()
1309 clk_disable_unprepare(i2c->clk); in i2c_pxa_probe()
1315 struct pxa_i2c *i2c = platform_get_drvdata(dev); in i2c_pxa_remove() local
1317 i2c_del_adapter(&i2c->adap); in i2c_pxa_remove()
1319 clk_disable_unprepare(i2c->clk); in i2c_pxa_remove()
1328 struct pxa_i2c *i2c = platform_get_drvdata(pdev); in i2c_pxa_suspend_noirq() local
1330 clk_disable(i2c->clk); in i2c_pxa_suspend_noirq()
1338 struct pxa_i2c *i2c = platform_get_drvdata(pdev); in i2c_pxa_resume_noirq() local
1340 clk_enable(i2c->clk); in i2c_pxa_resume_noirq()
1341 i2c_pxa_reset(i2c); in i2c_pxa_resume_noirq()