Lines Matching refs:i2c
216 #define _IBMR(i2c) ((i2c)->reg_ibmr) argument
217 #define _IDBR(i2c) ((i2c)->reg_idbr) argument
218 #define _ICR(i2c) ((i2c)->reg_icr) argument
219 #define _ISR(i2c) ((i2c)->reg_isr) argument
220 #define _ISAR(i2c) ((i2c)->reg_isar) argument
221 #define _ILCR(i2c) ((i2c)->reg_ilcr) argument
222 #define _IWCR(i2c) ((i2c)->reg_iwcr) argument
298 static void i2c_pxa_show_state(struct pxa_i2c *i2c, int lno, const char *fname) in i2c_pxa_show_state() argument
300 dev_dbg(&i2c->adap.dev, "state:%s:%d: ISR=%08x, ICR=%08x, IBMR=%02x\n", fname, lno, in i2c_pxa_show_state()
301 readl(_ISR(i2c)), readl(_ICR(i2c)), readl(_IBMR(i2c))); in i2c_pxa_show_state()
304 #define show_state(i2c) i2c_pxa_show_state(i2c, __LINE__, __func__) argument
306 static void i2c_pxa_scream_blue_murder(struct pxa_i2c *i2c, const char *why) in i2c_pxa_scream_blue_murder() argument
309 struct device *dev = &i2c->adap.dev; in i2c_pxa_scream_blue_murder()
312 i2c->req_slave_addr >> 1, why); in i2c_pxa_scream_blue_murder()
314 i2c->msg_num, i2c->msg_idx, i2c->msg_ptr); in i2c_pxa_scream_blue_murder()
316 readl(_IBMR(i2c)), readl(_IDBR(i2c)), readl(_ICR(i2c)), in i2c_pxa_scream_blue_murder()
317 readl(_ISR(i2c))); in i2c_pxa_scream_blue_murder()
319 for (i = 0; i < i2c->irqlogidx; i++) in i2c_pxa_scream_blue_murder()
320 pr_debug("[%08x:%08x] ", i2c->isrlog[i], i2c->icrlog[i]); in i2c_pxa_scream_blue_murder()
329 #define show_state(i2c) do { } while (0) argument
332 #define i2c_pxa_scream_blue_murder(i2c, why) do { } while (0) argument
336 static void i2c_pxa_master_complete(struct pxa_i2c *i2c, int ret);
339 static inline int i2c_pxa_is_slavemode(struct pxa_i2c *i2c) in i2c_pxa_is_slavemode() argument
341 return !(readl(_ICR(i2c)) & ICR_SCLE); in i2c_pxa_is_slavemode()
344 static void i2c_pxa_abort(struct pxa_i2c *i2c) in i2c_pxa_abort() argument
348 if (i2c_pxa_is_slavemode(i2c)) { in i2c_pxa_abort()
349 dev_dbg(&i2c->adap.dev, "%s: called in slave mode\n", __func__); in i2c_pxa_abort()
353 while ((i > 0) && (readl(_IBMR(i2c)) & 0x1) == 0) { in i2c_pxa_abort()
354 unsigned long icr = readl(_ICR(i2c)); in i2c_pxa_abort()
359 writel(icr, _ICR(i2c)); in i2c_pxa_abort()
361 show_state(i2c); in i2c_pxa_abort()
367 writel(readl(_ICR(i2c)) & ~(ICR_MA | ICR_START | ICR_STOP), in i2c_pxa_abort()
368 _ICR(i2c)); in i2c_pxa_abort()
371 static int i2c_pxa_wait_bus_not_busy(struct pxa_i2c *i2c) in i2c_pxa_wait_bus_not_busy() argument
375 while (timeout-- && readl(_ISR(i2c)) & (ISR_IBB | ISR_UB)) { in i2c_pxa_wait_bus_not_busy()
376 if ((readl(_ISR(i2c)) & ISR_SAD) != 0) in i2c_pxa_wait_bus_not_busy()
380 show_state(i2c); in i2c_pxa_wait_bus_not_busy()
384 show_state(i2c); in i2c_pxa_wait_bus_not_busy()
389 static int i2c_pxa_wait_master(struct pxa_i2c *i2c) in i2c_pxa_wait_master() argument
395 dev_dbg(&i2c->adap.dev, "%s: %ld: ISR=%08x, ICR=%08x, IBMR=%02x\n", in i2c_pxa_wait_master()
396 __func__, (long)jiffies, readl(_ISR(i2c)), readl(_ICR(i2c)), readl(_IBMR(i2c))); in i2c_pxa_wait_master()
398 if (readl(_ISR(i2c)) & ISR_SAD) { in i2c_pxa_wait_master()
400 dev_dbg(&i2c->adap.dev, "%s: Slave detected\n", __func__); in i2c_pxa_wait_master()
408 if ((readl(_ISR(i2c)) & (ISR_UB | ISR_IBB)) == 0 && readl(_IBMR(i2c)) == 3) { in i2c_pxa_wait_master()
410 dev_dbg(&i2c->adap.dev, "%s: done\n", __func__); in i2c_pxa_wait_master()
418 dev_dbg(&i2c->adap.dev, "%s: did not free\n", __func__); in i2c_pxa_wait_master()
423 static int i2c_pxa_set_master(struct pxa_i2c *i2c) in i2c_pxa_set_master() argument
426 dev_dbg(&i2c->adap.dev, "setting to bus master\n"); in i2c_pxa_set_master()
428 if ((readl(_ISR(i2c)) & (ISR_UB | ISR_IBB)) != 0) { in i2c_pxa_set_master()
429 dev_dbg(&i2c->adap.dev, "%s: unit is busy\n", __func__); in i2c_pxa_set_master()
430 if (!i2c_pxa_wait_master(i2c)) { in i2c_pxa_set_master()
431 dev_dbg(&i2c->adap.dev, "%s: error: unit busy\n", __func__); in i2c_pxa_set_master()
436 writel(readl(_ICR(i2c)) | ICR_SCLE, _ICR(i2c)); in i2c_pxa_set_master()
441 static int i2c_pxa_wait_slave(struct pxa_i2c *i2c) in i2c_pxa_wait_slave() argument
447 show_state(i2c); in i2c_pxa_wait_slave()
451 dev_dbg(&i2c->adap.dev, "%s: %ld: ISR=%08x, ICR=%08x, IBMR=%02x\n", in i2c_pxa_wait_slave()
452 __func__, (long)jiffies, readl(_ISR(i2c)), readl(_ICR(i2c)), readl(_IBMR(i2c))); in i2c_pxa_wait_slave()
454 if ((readl(_ISR(i2c)) & (ISR_UB|ISR_IBB)) == 0 || in i2c_pxa_wait_slave()
455 (readl(_ISR(i2c)) & ISR_SAD) != 0 || in i2c_pxa_wait_slave()
456 (readl(_ICR(i2c)) & ICR_SCLE) == 0) { in i2c_pxa_wait_slave()
458 dev_dbg(&i2c->adap.dev, "%s: done\n", __func__); in i2c_pxa_wait_slave()
466 dev_dbg(&i2c->adap.dev, "%s: did not free\n", __func__); in i2c_pxa_wait_slave()
474 static void i2c_pxa_set_slave(struct pxa_i2c *i2c, int errcode) in i2c_pxa_set_slave() argument
476 show_state(i2c); in i2c_pxa_set_slave()
484 if (readl(_ICR(i2c)) & ICR_STOP) { in i2c_pxa_set_slave()
486 writel(readl(_ICR(i2c)) & ~ICR_STOP, _ICR(i2c)); in i2c_pxa_set_slave()
489 if (!i2c_pxa_wait_slave(i2c)) { in i2c_pxa_set_slave()
490 dev_err(&i2c->adap.dev, "%s: wait timedout\n", in i2c_pxa_set_slave()
496 writel(readl(_ICR(i2c)) & ~(ICR_STOP|ICR_ACKNAK|ICR_MA), _ICR(i2c)); in i2c_pxa_set_slave()
497 writel(readl(_ICR(i2c)) & ~ICR_SCLE, _ICR(i2c)); in i2c_pxa_set_slave()
500 dev_dbg(&i2c->adap.dev, "ICR now %08x, ISR %08x\n", readl(_ICR(i2c)), readl(_ISR(i2c))); in i2c_pxa_set_slave()
501 decode_ICR(readl(_ICR(i2c))); in i2c_pxa_set_slave()
505 #define i2c_pxa_set_slave(i2c, err) do { } while (0) argument
508 static void i2c_pxa_reset(struct pxa_i2c *i2c) in i2c_pxa_reset() argument
513 i2c_pxa_abort(i2c); in i2c_pxa_reset()
516 writel(ICR_UR, _ICR(i2c)); in i2c_pxa_reset()
517 writel(I2C_ISR_INIT, _ISR(i2c)); in i2c_pxa_reset()
518 writel(readl(_ICR(i2c)) & ~ICR_UR, _ICR(i2c)); in i2c_pxa_reset()
520 if (i2c->reg_isar && IS_ENABLED(CONFIG_I2C_PXA_SLAVE)) in i2c_pxa_reset()
521 writel(i2c->slave_addr, _ISAR(i2c)); in i2c_pxa_reset()
524 writel(I2C_ICR_INIT | (i2c->fast_mode ? i2c->fm_mask : 0), _ICR(i2c)); in i2c_pxa_reset()
525 writel(readl(_ICR(i2c)) | (i2c->high_mode ? i2c->hs_mask : 0), _ICR(i2c)); in i2c_pxa_reset()
528 dev_info(&i2c->adap.dev, "Enabling slave mode\n"); in i2c_pxa_reset()
529 writel(readl(_ICR(i2c)) | ICR_SADIE | ICR_ALDIE | ICR_SSDIE, _ICR(i2c)); in i2c_pxa_reset()
532 i2c_pxa_set_slave(i2c, 0); in i2c_pxa_reset()
535 writel(readl(_ICR(i2c)) | ICR_IUE, _ICR(i2c)); in i2c_pxa_reset()
545 static void i2c_pxa_slave_txempty(struct pxa_i2c *i2c, u32 isr) in i2c_pxa_slave_txempty() argument
552 if (i2c->slave != NULL) in i2c_pxa_slave_txempty()
553 ret = i2c->slave->read(i2c->slave->data); in i2c_pxa_slave_txempty()
555 writel(ret, _IDBR(i2c)); in i2c_pxa_slave_txempty()
556 writel(readl(_ICR(i2c)) | ICR_TB, _ICR(i2c)); /* allow next byte */ in i2c_pxa_slave_txempty()
560 static void i2c_pxa_slave_rxfull(struct pxa_i2c *i2c, u32 isr) in i2c_pxa_slave_rxfull() argument
562 unsigned int byte = readl(_IDBR(i2c)); in i2c_pxa_slave_rxfull()
564 if (i2c->slave != NULL) in i2c_pxa_slave_rxfull()
565 i2c->slave->write(i2c->slave->data, byte); in i2c_pxa_slave_rxfull()
567 writel(readl(_ICR(i2c)) | ICR_TB, _ICR(i2c)); in i2c_pxa_slave_rxfull()
570 static void i2c_pxa_slave_start(struct pxa_i2c *i2c, u32 isr) in i2c_pxa_slave_start() argument
575 dev_dbg(&i2c->adap.dev, "SAD, mode is slave-%cx\n", in i2c_pxa_slave_start()
578 if (i2c->slave != NULL) in i2c_pxa_slave_start()
579 i2c->slave->event(i2c->slave->data, in i2c_pxa_slave_start()
587 writel(readl(_ICR(i2c)) & ~(ICR_START|ICR_STOP), _ICR(i2c)); in i2c_pxa_slave_start()
588 writel(readl(_ICR(i2c)) | ICR_TB, _ICR(i2c)); in i2c_pxa_slave_start()
593 if ((readl(_IBMR(i2c)) & 2) == 2) in i2c_pxa_slave_start()
599 dev_err(&i2c->adap.dev, "timeout waiting for SCL high\n"); in i2c_pxa_slave_start()
604 writel(readl(_ICR(i2c)) & ~ICR_SCLE, _ICR(i2c)); in i2c_pxa_slave_start()
607 static void i2c_pxa_slave_stop(struct pxa_i2c *i2c) in i2c_pxa_slave_stop() argument
610 dev_dbg(&i2c->adap.dev, "ISR: SSD (Slave Stop)\n"); in i2c_pxa_slave_stop()
612 if (i2c->slave != NULL) in i2c_pxa_slave_stop()
613 i2c->slave->event(i2c->slave->data, I2C_SLAVE_EVENT_STOP); in i2c_pxa_slave_stop()
616 dev_dbg(&i2c->adap.dev, "ISR: SSD (Slave Stop) acked\n"); in i2c_pxa_slave_stop()
622 if (i2c->msg) in i2c_pxa_slave_stop()
623 i2c_pxa_master_complete(i2c, I2C_RETRY); in i2c_pxa_slave_stop()
626 static void i2c_pxa_slave_txempty(struct pxa_i2c *i2c, u32 isr) in i2c_pxa_slave_txempty() argument
631 writel(0, _IDBR(i2c)); in i2c_pxa_slave_txempty()
632 writel(readl(_ICR(i2c)) | ICR_TB, _ICR(i2c)); in i2c_pxa_slave_txempty()
636 static void i2c_pxa_slave_rxfull(struct pxa_i2c *i2c, u32 isr) in i2c_pxa_slave_rxfull() argument
638 writel(readl(_ICR(i2c)) | ICR_TB | ICR_ACKNAK, _ICR(i2c)); in i2c_pxa_slave_rxfull()
641 static void i2c_pxa_slave_start(struct pxa_i2c *i2c, u32 isr) in i2c_pxa_slave_start() argument
650 writel(readl(_ICR(i2c)) & ~(ICR_START|ICR_STOP), _ICR(i2c)); in i2c_pxa_slave_start()
651 writel(readl(_ICR(i2c)) | ICR_TB | ICR_ACKNAK, _ICR(i2c)); in i2c_pxa_slave_start()
656 if ((readl(_IBMR(i2c)) & 2) == 2) in i2c_pxa_slave_start()
662 dev_err(&i2c->adap.dev, "timeout waiting for SCL high\n"); in i2c_pxa_slave_start()
667 writel(readl(_ICR(i2c)) & ~ICR_SCLE, _ICR(i2c)); in i2c_pxa_slave_start()
670 static void i2c_pxa_slave_stop(struct pxa_i2c *i2c) in i2c_pxa_slave_stop() argument
672 if (i2c->msg) in i2c_pxa_slave_stop()
673 i2c_pxa_master_complete(i2c, I2C_RETRY); in i2c_pxa_slave_stop()
691 static inline void i2c_pxa_start_message(struct pxa_i2c *i2c) in i2c_pxa_start_message() argument
698 writel(i2c_pxa_addr_byte(i2c->msg), _IDBR(i2c)); in i2c_pxa_start_message()
699 i2c->req_slave_addr = i2c_pxa_addr_byte(i2c->msg); in i2c_pxa_start_message()
704 icr = readl(_ICR(i2c)) & ~(ICR_STOP | ICR_ALDIE); in i2c_pxa_start_message()
705 writel(icr | ICR_START | ICR_TB, _ICR(i2c)); in i2c_pxa_start_message()
708 static inline void i2c_pxa_stop_message(struct pxa_i2c *i2c) in i2c_pxa_stop_message() argument
715 icr = readl(_ICR(i2c)); in i2c_pxa_stop_message()
717 writel(icr, _ICR(i2c)); in i2c_pxa_stop_message()
720 static int i2c_pxa_pio_set_master(struct pxa_i2c *i2c) in i2c_pxa_pio_set_master() argument
728 while (timeout-- && readl(_ISR(i2c)) & (ISR_IBB | ISR_UB)) { in i2c_pxa_pio_set_master()
730 show_state(i2c); in i2c_pxa_pio_set_master()
734 show_state(i2c); in i2c_pxa_pio_set_master()
735 dev_err(&i2c->adap.dev, in i2c_pxa_pio_set_master()
743 writel(readl(_ICR(i2c)) | ICR_SCLE, _ICR(i2c)); in i2c_pxa_pio_set_master()
754 static int i2c_pxa_send_mastercode(struct pxa_i2c *i2c) in i2c_pxa_send_mastercode() argument
759 spin_lock_irq(&i2c->lock); in i2c_pxa_send_mastercode()
760 i2c->highmode_enter = true; in i2c_pxa_send_mastercode()
761 writel(i2c->master_code, _IDBR(i2c)); in i2c_pxa_send_mastercode()
763 icr = readl(_ICR(i2c)) & ~(ICR_STOP | ICR_ALDIE); in i2c_pxa_send_mastercode()
765 writel(icr, _ICR(i2c)); in i2c_pxa_send_mastercode()
767 spin_unlock_irq(&i2c->lock); in i2c_pxa_send_mastercode()
768 timeout = wait_event_timeout(i2c->wait, in i2c_pxa_send_mastercode()
769 i2c->highmode_enter == false, HZ * 1); in i2c_pxa_send_mastercode()
771 i2c->highmode_enter = false; in i2c_pxa_send_mastercode()
776 static int i2c_pxa_do_pio_xfer(struct pxa_i2c *i2c, in i2c_pxa_do_pio_xfer() argument
782 ret = i2c_pxa_pio_set_master(i2c); in i2c_pxa_do_pio_xfer()
786 i2c->msg = msg; in i2c_pxa_do_pio_xfer()
787 i2c->msg_num = num; in i2c_pxa_do_pio_xfer()
788 i2c->msg_idx = 0; in i2c_pxa_do_pio_xfer()
789 i2c->msg_ptr = 0; in i2c_pxa_do_pio_xfer()
790 i2c->irqlogidx = 0; in i2c_pxa_do_pio_xfer()
792 i2c_pxa_start_message(i2c); in i2c_pxa_do_pio_xfer()
794 while (i2c->msg_num > 0 && --timeout) { in i2c_pxa_do_pio_xfer()
795 i2c_pxa_handler(0, i2c); in i2c_pxa_do_pio_xfer()
799 i2c_pxa_stop_message(i2c); in i2c_pxa_do_pio_xfer()
804 ret = i2c->msg_idx; in i2c_pxa_do_pio_xfer()
808 i2c_pxa_scream_blue_murder(i2c, "timeout"); in i2c_pxa_do_pio_xfer()
818 static int i2c_pxa_do_xfer(struct pxa_i2c *i2c, struct i2c_msg *msg, int num) in i2c_pxa_do_xfer() argument
826 ret = i2c_pxa_wait_bus_not_busy(i2c); in i2c_pxa_do_xfer()
828 dev_err(&i2c->adap.dev, "i2c_pxa: timeout waiting for bus free\n"); in i2c_pxa_do_xfer()
835 ret = i2c_pxa_set_master(i2c); in i2c_pxa_do_xfer()
837 dev_err(&i2c->adap.dev, "i2c_pxa_set_master: error %d\n", ret); in i2c_pxa_do_xfer()
841 if (i2c->high_mode) { in i2c_pxa_do_xfer()
842 ret = i2c_pxa_send_mastercode(i2c); in i2c_pxa_do_xfer()
844 dev_err(&i2c->adap.dev, "i2c_pxa_send_mastercode timeout\n"); in i2c_pxa_do_xfer()
849 spin_lock_irq(&i2c->lock); in i2c_pxa_do_xfer()
851 i2c->msg = msg; in i2c_pxa_do_xfer()
852 i2c->msg_num = num; in i2c_pxa_do_xfer()
853 i2c->msg_idx = 0; in i2c_pxa_do_xfer()
854 i2c->msg_ptr = 0; in i2c_pxa_do_xfer()
855 i2c->irqlogidx = 0; in i2c_pxa_do_xfer()
857 i2c_pxa_start_message(i2c); in i2c_pxa_do_xfer()
859 spin_unlock_irq(&i2c->lock); in i2c_pxa_do_xfer()
864 timeout = wait_event_timeout(i2c->wait, i2c->msg_num == 0, HZ * 5); in i2c_pxa_do_xfer()
865 i2c_pxa_stop_message(i2c); in i2c_pxa_do_xfer()
870 ret = i2c->msg_idx; in i2c_pxa_do_xfer()
872 if (!timeout && i2c->msg_num) { in i2c_pxa_do_xfer()
873 i2c_pxa_scream_blue_murder(i2c, "timeout"); in i2c_pxa_do_xfer()
884 struct pxa_i2c *i2c = adap->algo_data; in i2c_pxa_pio_xfer() local
891 if (!(readl(_ICR(i2c)) & ICR_IUE)) in i2c_pxa_pio_xfer()
892 i2c_pxa_reset(i2c); in i2c_pxa_pio_xfer()
895 ret = i2c_pxa_do_pio_xfer(i2c, msgs, num); in i2c_pxa_pio_xfer()
903 i2c_pxa_scream_blue_murder(i2c, "exhausted retries"); in i2c_pxa_pio_xfer()
906 i2c_pxa_set_slave(i2c, ret); in i2c_pxa_pio_xfer()
913 static void i2c_pxa_master_complete(struct pxa_i2c *i2c, int ret) in i2c_pxa_master_complete() argument
915 i2c->msg_ptr = 0; in i2c_pxa_master_complete()
916 i2c->msg = NULL; in i2c_pxa_master_complete()
917 i2c->msg_idx ++; in i2c_pxa_master_complete()
918 i2c->msg_num = 0; in i2c_pxa_master_complete()
920 i2c->msg_idx = ret; in i2c_pxa_master_complete()
921 if (!i2c->use_pio) in i2c_pxa_master_complete()
922 wake_up(&i2c->wait); in i2c_pxa_master_complete()
925 static void i2c_pxa_irq_txempty(struct pxa_i2c *i2c, u32 isr) in i2c_pxa_irq_txempty() argument
927 u32 icr = readl(_ICR(i2c)) & ~(ICR_START|ICR_STOP|ICR_ACKNAK|ICR_TB); in i2c_pxa_irq_txempty()
938 i2c_pxa_scream_blue_murder(i2c, "ALD set"); in i2c_pxa_irq_txempty()
950 (!((i2c->msg->flags & I2C_M_IGNORE_NAK) && in i2c_pxa_irq_txempty()
960 if (i2c->msg_ptr == 0 && i2c->msg_idx == 0) in i2c_pxa_irq_txempty()
965 i2c_pxa_master_complete(i2c, ret); in i2c_pxa_irq_txempty()
971 if (i2c->msg_ptr == i2c->msg->len - 1 && in i2c_pxa_irq_txempty()
972 i2c->msg_idx == i2c->msg_num - 1) in i2c_pxa_irq_txempty()
976 } else if (i2c->msg_ptr < i2c->msg->len) { in i2c_pxa_irq_txempty()
980 writel(i2c->msg->buf[i2c->msg_ptr++], _IDBR(i2c)); in i2c_pxa_irq_txempty()
988 if ((i2c->msg_ptr == i2c->msg->len) && in i2c_pxa_irq_txempty()
989 ((i2c->msg->flags & I2C_M_STOP) || in i2c_pxa_irq_txempty()
990 (i2c->msg_idx == i2c->msg_num - 1))) in i2c_pxa_irq_txempty()
993 } else if (i2c->msg_idx < i2c->msg_num - 1) { in i2c_pxa_irq_txempty()
997 i2c->msg_ptr = 0; in i2c_pxa_irq_txempty()
998 i2c->msg_idx ++; in i2c_pxa_irq_txempty()
999 i2c->msg++; in i2c_pxa_irq_txempty()
1006 if (i2c->msg->flags & I2C_M_NOSTART) in i2c_pxa_irq_txempty()
1012 writel(i2c_pxa_addr_byte(i2c->msg), _IDBR(i2c)); in i2c_pxa_irq_txempty()
1013 i2c->req_slave_addr = i2c_pxa_addr_byte(i2c->msg); in i2c_pxa_irq_txempty()
1021 if (i2c->msg->len == 0) { in i2c_pxa_irq_txempty()
1027 i2c_pxa_reset(i2c); in i2c_pxa_irq_txempty()
1029 i2c_pxa_master_complete(i2c, 0); in i2c_pxa_irq_txempty()
1032 i2c->icrlog[i2c->irqlogidx-1] = icr; in i2c_pxa_irq_txempty()
1034 writel(icr, _ICR(i2c)); in i2c_pxa_irq_txempty()
1035 show_state(i2c); in i2c_pxa_irq_txempty()
1038 static void i2c_pxa_irq_rxfull(struct pxa_i2c *i2c, u32 isr) in i2c_pxa_irq_rxfull() argument
1040 u32 icr = readl(_ICR(i2c)) & ~(ICR_START|ICR_STOP|ICR_ACKNAK|ICR_TB); in i2c_pxa_irq_rxfull()
1045 i2c->msg->buf[i2c->msg_ptr++] = readl(_IDBR(i2c)); in i2c_pxa_irq_rxfull()
1047 if (i2c->msg_ptr < i2c->msg->len) { in i2c_pxa_irq_rxfull()
1052 if (i2c->msg_ptr == i2c->msg->len - 1) in i2c_pxa_irq_rxfull()
1057 i2c_pxa_master_complete(i2c, 0); in i2c_pxa_irq_rxfull()
1060 i2c->icrlog[i2c->irqlogidx-1] = icr; in i2c_pxa_irq_rxfull()
1062 writel(icr, _ICR(i2c)); in i2c_pxa_irq_rxfull()
1069 struct pxa_i2c *i2c = dev_id; in i2c_pxa_handler() local
1070 u32 isr = readl(_ISR(i2c)); in i2c_pxa_handler()
1076 dev_dbg(&i2c->adap.dev, "%s: ISR=%08x, ICR=%08x, IBMR=%02x\n", in i2c_pxa_handler()
1077 __func__, isr, readl(_ICR(i2c)), readl(_IBMR(i2c))); in i2c_pxa_handler()
1081 if (i2c->irqlogidx < ARRAY_SIZE(i2c->isrlog)) in i2c_pxa_handler()
1082 i2c->isrlog[i2c->irqlogidx++] = isr; in i2c_pxa_handler()
1084 show_state(i2c); in i2c_pxa_handler()
1089 writel(isr & VALID_INT_SOURCE, _ISR(i2c)); in i2c_pxa_handler()
1092 i2c_pxa_slave_start(i2c, isr); in i2c_pxa_handler()
1094 i2c_pxa_slave_stop(i2c); in i2c_pxa_handler()
1096 if (i2c_pxa_is_slavemode(i2c)) { in i2c_pxa_handler()
1098 i2c_pxa_slave_txempty(i2c, isr); in i2c_pxa_handler()
1100 i2c_pxa_slave_rxfull(i2c, isr); in i2c_pxa_handler()
1101 } else if (i2c->msg && (!i2c->highmode_enter)) { in i2c_pxa_handler()
1103 i2c_pxa_irq_txempty(i2c, isr); in i2c_pxa_handler()
1105 i2c_pxa_irq_rxfull(i2c, isr); in i2c_pxa_handler()
1106 } else if ((isr & ISR_ITE) && i2c->highmode_enter) { in i2c_pxa_handler()
1107 i2c->highmode_enter = false; in i2c_pxa_handler()
1108 wake_up(&i2c->wait); in i2c_pxa_handler()
1110 i2c_pxa_scream_blue_murder(i2c, "spurious irq"); in i2c_pxa_handler()
1119 struct pxa_i2c *i2c = adap->algo_data; in i2c_pxa_xfer() local
1123 ret = i2c_pxa_do_xfer(i2c, msgs, num); in i2c_pxa_xfer()
1131 i2c_pxa_scream_blue_murder(i2c, "exhausted retries"); in i2c_pxa_xfer()
1134 i2c_pxa_set_slave(i2c, ret); in i2c_pxa_xfer()
1163 static int i2c_pxa_probe_dt(struct platform_device *pdev, struct pxa_i2c *i2c, in i2c_pxa_probe_dt() argument
1174 i2c->adap.nr = -1; in i2c_pxa_probe_dt()
1177 i2c->use_pio = 1; in i2c_pxa_probe_dt()
1179 i2c->fast_mode = 1; in i2c_pxa_probe_dt()
1187 struct pxa_i2c *i2c, in i2c_pxa_probe_pdata() argument
1195 i2c->use_pio = plat->use_pio; in i2c_pxa_probe_pdata()
1196 i2c->fast_mode = plat->fast_mode; in i2c_pxa_probe_pdata()
1197 i2c->high_mode = plat->high_mode; in i2c_pxa_probe_pdata()
1198 i2c->master_code = plat->master_code; in i2c_pxa_probe_pdata()
1199 if (!i2c->master_code) in i2c_pxa_probe_pdata()
1200 i2c->master_code = 0xe; in i2c_pxa_probe_pdata()
1201 i2c->rate = plat->rate; in i2c_pxa_probe_pdata()
1210 struct pxa_i2c *i2c; in i2c_pxa_probe() local
1214 i2c = devm_kzalloc(&dev->dev, sizeof(struct pxa_i2c), GFP_KERNEL); in i2c_pxa_probe()
1215 if (!i2c) in i2c_pxa_probe()
1219 i2c->reg_base = devm_ioremap_resource(&dev->dev, res); in i2c_pxa_probe()
1220 if (IS_ERR(i2c->reg_base)) in i2c_pxa_probe()
1221 return PTR_ERR(i2c->reg_base); in i2c_pxa_probe()
1230 i2c->adap.nr = dev->id; in i2c_pxa_probe()
1232 ret = i2c_pxa_probe_dt(dev, i2c, &i2c_type); in i2c_pxa_probe()
1234 ret = i2c_pxa_probe_pdata(dev, i2c, &i2c_type); in i2c_pxa_probe()
1238 i2c->adap.owner = THIS_MODULE; in i2c_pxa_probe()
1239 i2c->adap.retries = 5; in i2c_pxa_probe()
1241 spin_lock_init(&i2c->lock); in i2c_pxa_probe()
1242 init_waitqueue_head(&i2c->wait); in i2c_pxa_probe()
1244 strlcpy(i2c->adap.name, "pxa_i2c-i2c", sizeof(i2c->adap.name)); in i2c_pxa_probe()
1246 i2c->clk = devm_clk_get(&dev->dev, NULL); in i2c_pxa_probe()
1247 if (IS_ERR(i2c->clk)) { in i2c_pxa_probe()
1248 dev_err(&dev->dev, "failed to get the clk: %ld\n", PTR_ERR(i2c->clk)); in i2c_pxa_probe()
1249 return PTR_ERR(i2c->clk); in i2c_pxa_probe()
1252 i2c->reg_ibmr = i2c->reg_base + pxa_reg_layout[i2c_type].ibmr; in i2c_pxa_probe()
1253 i2c->reg_idbr = i2c->reg_base + pxa_reg_layout[i2c_type].idbr; in i2c_pxa_probe()
1254 i2c->reg_icr = i2c->reg_base + pxa_reg_layout[i2c_type].icr; in i2c_pxa_probe()
1255 i2c->reg_isr = i2c->reg_base + pxa_reg_layout[i2c_type].isr; in i2c_pxa_probe()
1256 i2c->fm_mask = pxa_reg_layout[i2c_type].fm ? : ICR_FM; in i2c_pxa_probe()
1257 i2c->hs_mask = pxa_reg_layout[i2c_type].hs ? : ICR_HS; in i2c_pxa_probe()
1260 i2c->reg_isar = i2c->reg_base + pxa_reg_layout[i2c_type].isar; in i2c_pxa_probe()
1263 i2c->reg_ilcr = i2c->reg_base + pxa_reg_layout[i2c_type].ilcr; in i2c_pxa_probe()
1264 i2c->reg_iwcr = i2c->reg_base + pxa_reg_layout[i2c_type].iwcr; in i2c_pxa_probe()
1267 i2c->iobase = res->start; in i2c_pxa_probe()
1268 i2c->iosize = resource_size(res); in i2c_pxa_probe()
1270 i2c->irq = irq; in i2c_pxa_probe()
1272 i2c->slave_addr = I2C_PXA_SLAVE_ADDR; in i2c_pxa_probe()
1273 i2c->highmode_enter = false; in i2c_pxa_probe()
1277 i2c->slave_addr = plat->slave_addr; in i2c_pxa_probe()
1278 i2c->slave = plat->slave; in i2c_pxa_probe()
1280 i2c->adap.class = plat->class; in i2c_pxa_probe()
1283 if (i2c->high_mode) { in i2c_pxa_probe()
1284 if (i2c->rate) { in i2c_pxa_probe()
1285 clk_set_rate(i2c->clk, i2c->rate); in i2c_pxa_probe()
1287 i2c->adap.name, clk_get_rate(i2c->clk)); in i2c_pxa_probe()
1290 i2c->adap.name); in i2c_pxa_probe()
1293 clk_prepare_enable(i2c->clk); in i2c_pxa_probe()
1295 if (i2c->use_pio) { in i2c_pxa_probe()
1296 i2c->adap.algo = &i2c_pxa_pio_algorithm; in i2c_pxa_probe()
1298 i2c->adap.algo = &i2c_pxa_algorithm; in i2c_pxa_probe()
1301 dev_name(&dev->dev), i2c); in i2c_pxa_probe()
1308 i2c_pxa_reset(i2c); in i2c_pxa_probe()
1310 i2c->adap.algo_data = i2c; in i2c_pxa_probe()
1311 i2c->adap.dev.parent = &dev->dev; in i2c_pxa_probe()
1313 i2c->adap.dev.of_node = dev->dev.of_node; in i2c_pxa_probe()
1316 ret = i2c_add_numbered_adapter(&i2c->adap); in i2c_pxa_probe()
1320 platform_set_drvdata(dev, i2c); in i2c_pxa_probe()
1323 dev_info(&i2c->adap.dev, " PXA I2C adapter, slave address %d\n", in i2c_pxa_probe()
1324 i2c->slave_addr); in i2c_pxa_probe()
1326 dev_info(&i2c->adap.dev, " PXA I2C adapter\n"); in i2c_pxa_probe()
1331 clk_disable_unprepare(i2c->clk); in i2c_pxa_probe()
1337 struct pxa_i2c *i2c = platform_get_drvdata(dev); in i2c_pxa_remove() local
1339 i2c_del_adapter(&i2c->adap); in i2c_pxa_remove()
1341 clk_disable_unprepare(i2c->clk); in i2c_pxa_remove()
1349 struct pxa_i2c *i2c = dev_get_drvdata(dev); in i2c_pxa_suspend_noirq() local
1351 clk_disable(i2c->clk); in i2c_pxa_suspend_noirq()
1358 struct pxa_i2c *i2c = dev_get_drvdata(dev); in i2c_pxa_resume_noirq() local
1360 clk_enable(i2c->clk); in i2c_pxa_resume_noirq()
1361 i2c_pxa_reset(i2c); in i2c_pxa_resume_noirq()