Lines Matching refs:i2c
165 #define _IBMR(i2c) ((i2c)->reg_ibmr) argument
166 #define _IDBR(i2c) ((i2c)->reg_idbr) argument
167 #define _ICR(i2c) ((i2c)->reg_icr) argument
168 #define _ISR(i2c) ((i2c)->reg_isr) argument
169 #define _ISAR(i2c) ((i2c)->reg_isar) argument
245 static void i2c_pxa_show_state(struct pxa_i2c *i2c, int lno, const char *fname) in i2c_pxa_show_state() argument
247 dev_dbg(&i2c->adap.dev, "state:%s:%d: ISR=%08x, ICR=%08x, IBMR=%02x\n", fname, lno, in i2c_pxa_show_state()
248 readl(_ISR(i2c)), readl(_ICR(i2c)), readl(_IBMR(i2c))); in i2c_pxa_show_state()
251 #define show_state(i2c) i2c_pxa_show_state(i2c, __LINE__, __func__) argument
253 static void i2c_pxa_scream_blue_murder(struct pxa_i2c *i2c, const char *why) in i2c_pxa_scream_blue_murder() argument
258 i2c->msg_num, i2c->msg_idx, i2c->msg_ptr); in i2c_pxa_scream_blue_murder()
260 readl(_ICR(i2c)), readl(_ISR(i2c))); in i2c_pxa_scream_blue_murder()
262 for (i = 0; i < i2c->irqlogidx; i++) in i2c_pxa_scream_blue_murder()
263 printk("[%08x:%08x] ", i2c->isrlog[i], i2c->icrlog[i]); in i2c_pxa_scream_blue_murder()
271 #define show_state(i2c) do { } while (0) argument
274 #define i2c_pxa_scream_blue_murder(i2c, why) do { } while (0) argument
278 static void i2c_pxa_master_complete(struct pxa_i2c *i2c, int ret);
281 static inline int i2c_pxa_is_slavemode(struct pxa_i2c *i2c) in i2c_pxa_is_slavemode() argument
283 return !(readl(_ICR(i2c)) & ICR_SCLE); in i2c_pxa_is_slavemode()
286 static void i2c_pxa_abort(struct pxa_i2c *i2c) in i2c_pxa_abort() argument
290 if (i2c_pxa_is_slavemode(i2c)) { in i2c_pxa_abort()
291 dev_dbg(&i2c->adap.dev, "%s: called in slave mode\n", __func__); in i2c_pxa_abort()
295 while ((i > 0) && (readl(_IBMR(i2c)) & 0x1) == 0) { in i2c_pxa_abort()
296 unsigned long icr = readl(_ICR(i2c)); in i2c_pxa_abort()
301 writel(icr, _ICR(i2c)); in i2c_pxa_abort()
303 show_state(i2c); in i2c_pxa_abort()
309 writel(readl(_ICR(i2c)) & ~(ICR_MA | ICR_START | ICR_STOP), in i2c_pxa_abort()
310 _ICR(i2c)); in i2c_pxa_abort()
313 static int i2c_pxa_wait_bus_not_busy(struct pxa_i2c *i2c) in i2c_pxa_wait_bus_not_busy() argument
317 while (timeout-- && readl(_ISR(i2c)) & (ISR_IBB | ISR_UB)) { in i2c_pxa_wait_bus_not_busy()
318 if ((readl(_ISR(i2c)) & ISR_SAD) != 0) in i2c_pxa_wait_bus_not_busy()
322 show_state(i2c); in i2c_pxa_wait_bus_not_busy()
326 show_state(i2c); in i2c_pxa_wait_bus_not_busy()
331 static int i2c_pxa_wait_master(struct pxa_i2c *i2c) in i2c_pxa_wait_master() argument
337 dev_dbg(&i2c->adap.dev, "%s: %ld: ISR=%08x, ICR=%08x, IBMR=%02x\n", in i2c_pxa_wait_master()
338 __func__, (long)jiffies, readl(_ISR(i2c)), readl(_ICR(i2c)), readl(_IBMR(i2c))); in i2c_pxa_wait_master()
340 if (readl(_ISR(i2c)) & ISR_SAD) { in i2c_pxa_wait_master()
342 dev_dbg(&i2c->adap.dev, "%s: Slave detected\n", __func__); in i2c_pxa_wait_master()
350 if ((readl(_ISR(i2c)) & (ISR_UB | ISR_IBB)) == 0 && readl(_IBMR(i2c)) == 3) { in i2c_pxa_wait_master()
352 dev_dbg(&i2c->adap.dev, "%s: done\n", __func__); in i2c_pxa_wait_master()
360 dev_dbg(&i2c->adap.dev, "%s: did not free\n", __func__); in i2c_pxa_wait_master()
365 static int i2c_pxa_set_master(struct pxa_i2c *i2c) in i2c_pxa_set_master() argument
368 dev_dbg(&i2c->adap.dev, "setting to bus master\n"); in i2c_pxa_set_master()
370 if ((readl(_ISR(i2c)) & (ISR_UB | ISR_IBB)) != 0) { in i2c_pxa_set_master()
371 dev_dbg(&i2c->adap.dev, "%s: unit is busy\n", __func__); in i2c_pxa_set_master()
372 if (!i2c_pxa_wait_master(i2c)) { in i2c_pxa_set_master()
373 dev_dbg(&i2c->adap.dev, "%s: error: unit busy\n", __func__); in i2c_pxa_set_master()
378 writel(readl(_ICR(i2c)) | ICR_SCLE, _ICR(i2c)); in i2c_pxa_set_master()
383 static int i2c_pxa_wait_slave(struct pxa_i2c *i2c) in i2c_pxa_wait_slave() argument
389 show_state(i2c); in i2c_pxa_wait_slave()
393 dev_dbg(&i2c->adap.dev, "%s: %ld: ISR=%08x, ICR=%08x, IBMR=%02x\n", in i2c_pxa_wait_slave()
394 __func__, (long)jiffies, readl(_ISR(i2c)), readl(_ICR(i2c)), readl(_IBMR(i2c))); in i2c_pxa_wait_slave()
396 if ((readl(_ISR(i2c)) & (ISR_UB|ISR_IBB)) == 0 || in i2c_pxa_wait_slave()
397 (readl(_ISR(i2c)) & ISR_SAD) != 0 || in i2c_pxa_wait_slave()
398 (readl(_ICR(i2c)) & ICR_SCLE) == 0) { in i2c_pxa_wait_slave()
400 dev_dbg(&i2c->adap.dev, "%s: done\n", __func__); in i2c_pxa_wait_slave()
408 dev_dbg(&i2c->adap.dev, "%s: did not free\n", __func__); in i2c_pxa_wait_slave()
416 static void i2c_pxa_set_slave(struct pxa_i2c *i2c, int errcode) in i2c_pxa_set_slave() argument
418 show_state(i2c); in i2c_pxa_set_slave()
426 if (readl(_ICR(i2c)) & ICR_STOP) { in i2c_pxa_set_slave()
428 writel(readl(_ICR(i2c)) & ~ICR_STOP, _ICR(i2c)); in i2c_pxa_set_slave()
431 if (!i2c_pxa_wait_slave(i2c)) { in i2c_pxa_set_slave()
432 dev_err(&i2c->adap.dev, "%s: wait timedout\n", in i2c_pxa_set_slave()
438 writel(readl(_ICR(i2c)) & ~(ICR_STOP|ICR_ACKNAK|ICR_MA), _ICR(i2c)); in i2c_pxa_set_slave()
439 writel(readl(_ICR(i2c)) & ~ICR_SCLE, _ICR(i2c)); in i2c_pxa_set_slave()
442 dev_dbg(&i2c->adap.dev, "ICR now %08x, ISR %08x\n", readl(_ICR(i2c)), readl(_ISR(i2c))); in i2c_pxa_set_slave()
443 decode_ICR(readl(_ICR(i2c))); in i2c_pxa_set_slave()
447 #define i2c_pxa_set_slave(i2c, err) do { } while (0) argument
450 static void i2c_pxa_reset(struct pxa_i2c *i2c) in i2c_pxa_reset() argument
455 i2c_pxa_abort(i2c); in i2c_pxa_reset()
458 writel(ICR_UR, _ICR(i2c)); in i2c_pxa_reset()
459 writel(I2C_ISR_INIT, _ISR(i2c)); in i2c_pxa_reset()
460 writel(readl(_ICR(i2c)) & ~ICR_UR, _ICR(i2c)); in i2c_pxa_reset()
462 if (i2c->reg_isar) in i2c_pxa_reset()
463 writel(i2c->slave_addr, _ISAR(i2c)); in i2c_pxa_reset()
466 writel(I2C_ICR_INIT | (i2c->fast_mode ? ICR_FM : 0), _ICR(i2c)); in i2c_pxa_reset()
467 writel(readl(_ICR(i2c)) | (i2c->high_mode ? ICR_HS : 0), _ICR(i2c)); in i2c_pxa_reset()
470 dev_info(&i2c->adap.dev, "Enabling slave mode\n"); in i2c_pxa_reset()
471 writel(readl(_ICR(i2c)) | ICR_SADIE | ICR_ALDIE | ICR_SSDIE, _ICR(i2c)); in i2c_pxa_reset()
474 i2c_pxa_set_slave(i2c, 0); in i2c_pxa_reset()
477 writel(readl(_ICR(i2c)) | ICR_IUE, _ICR(i2c)); in i2c_pxa_reset()
487 static void i2c_pxa_slave_txempty(struct pxa_i2c *i2c, u32 isr) in i2c_pxa_slave_txempty() argument
494 if (i2c->slave != NULL) in i2c_pxa_slave_txempty()
495 ret = i2c->slave->read(i2c->slave->data); in i2c_pxa_slave_txempty()
497 writel(ret, _IDBR(i2c)); in i2c_pxa_slave_txempty()
498 writel(readl(_ICR(i2c)) | ICR_TB, _ICR(i2c)); /* allow next byte */ in i2c_pxa_slave_txempty()
502 static void i2c_pxa_slave_rxfull(struct pxa_i2c *i2c, u32 isr) in i2c_pxa_slave_rxfull() argument
504 unsigned int byte = readl(_IDBR(i2c)); in i2c_pxa_slave_rxfull()
506 if (i2c->slave != NULL) in i2c_pxa_slave_rxfull()
507 i2c->slave->write(i2c->slave->data, byte); in i2c_pxa_slave_rxfull()
509 writel(readl(_ICR(i2c)) | ICR_TB, _ICR(i2c)); in i2c_pxa_slave_rxfull()
512 static void i2c_pxa_slave_start(struct pxa_i2c *i2c, u32 isr) in i2c_pxa_slave_start() argument
517 dev_dbg(&i2c->adap.dev, "SAD, mode is slave-%cx\n", in i2c_pxa_slave_start()
520 if (i2c->slave != NULL) in i2c_pxa_slave_start()
521 i2c->slave->event(i2c->slave->data, in i2c_pxa_slave_start()
529 writel(readl(_ICR(i2c)) & ~(ICR_START|ICR_STOP), _ICR(i2c)); in i2c_pxa_slave_start()
530 writel(readl(_ICR(i2c)) | ICR_TB, _ICR(i2c)); in i2c_pxa_slave_start()
535 if ((readl(_IBMR(i2c)) & 2) == 2) in i2c_pxa_slave_start()
541 dev_err(&i2c->adap.dev, "timeout waiting for SCL high\n"); in i2c_pxa_slave_start()
546 writel(readl(_ICR(i2c)) & ~ICR_SCLE, _ICR(i2c)); in i2c_pxa_slave_start()
549 static void i2c_pxa_slave_stop(struct pxa_i2c *i2c) in i2c_pxa_slave_stop() argument
552 dev_dbg(&i2c->adap.dev, "ISR: SSD (Slave Stop)\n"); in i2c_pxa_slave_stop()
554 if (i2c->slave != NULL) in i2c_pxa_slave_stop()
555 i2c->slave->event(i2c->slave->data, I2C_SLAVE_EVENT_STOP); in i2c_pxa_slave_stop()
558 dev_dbg(&i2c->adap.dev, "ISR: SSD (Slave Stop) acked\n"); in i2c_pxa_slave_stop()
564 if (i2c->msg) in i2c_pxa_slave_stop()
565 i2c_pxa_master_complete(i2c, I2C_RETRY); in i2c_pxa_slave_stop()
568 static void i2c_pxa_slave_txempty(struct pxa_i2c *i2c, u32 isr) in i2c_pxa_slave_txempty() argument
573 writel(0, _IDBR(i2c)); in i2c_pxa_slave_txempty()
574 writel(readl(_ICR(i2c)) | ICR_TB, _ICR(i2c)); in i2c_pxa_slave_txempty()
578 static void i2c_pxa_slave_rxfull(struct pxa_i2c *i2c, u32 isr) in i2c_pxa_slave_rxfull() argument
580 writel(readl(_ICR(i2c)) | ICR_TB | ICR_ACKNAK, _ICR(i2c)); in i2c_pxa_slave_rxfull()
583 static void i2c_pxa_slave_start(struct pxa_i2c *i2c, u32 isr) in i2c_pxa_slave_start() argument
592 writel(readl(_ICR(i2c)) & ~(ICR_START|ICR_STOP), _ICR(i2c)); in i2c_pxa_slave_start()
593 writel(readl(_ICR(i2c)) | ICR_TB | ICR_ACKNAK, _ICR(i2c)); in i2c_pxa_slave_start()
598 if ((readl(_IBMR(i2c)) & 2) == 2) in i2c_pxa_slave_start()
604 dev_err(&i2c->adap.dev, "timeout waiting for SCL high\n"); in i2c_pxa_slave_start()
609 writel(readl(_ICR(i2c)) & ~ICR_SCLE, _ICR(i2c)); in i2c_pxa_slave_start()
612 static void i2c_pxa_slave_stop(struct pxa_i2c *i2c) in i2c_pxa_slave_stop() argument
614 if (i2c->msg) in i2c_pxa_slave_stop()
615 i2c_pxa_master_complete(i2c, I2C_RETRY); in i2c_pxa_slave_stop()
633 static inline void i2c_pxa_start_message(struct pxa_i2c *i2c) in i2c_pxa_start_message() argument
640 writel(i2c_pxa_addr_byte(i2c->msg), _IDBR(i2c)); in i2c_pxa_start_message()
645 icr = readl(_ICR(i2c)) & ~(ICR_STOP | ICR_ALDIE); in i2c_pxa_start_message()
646 writel(icr | ICR_START | ICR_TB, _ICR(i2c)); in i2c_pxa_start_message()
649 static inline void i2c_pxa_stop_message(struct pxa_i2c *i2c) in i2c_pxa_stop_message() argument
656 icr = readl(_ICR(i2c)); in i2c_pxa_stop_message()
658 writel(icr, _ICR(i2c)); in i2c_pxa_stop_message()
661 static int i2c_pxa_pio_set_master(struct pxa_i2c *i2c) in i2c_pxa_pio_set_master() argument
669 while (timeout-- && readl(_ISR(i2c)) & (ISR_IBB | ISR_UB)) { in i2c_pxa_pio_set_master()
671 show_state(i2c); in i2c_pxa_pio_set_master()
675 show_state(i2c); in i2c_pxa_pio_set_master()
676 dev_err(&i2c->adap.dev, in i2c_pxa_pio_set_master()
684 writel(readl(_ICR(i2c)) | ICR_SCLE, _ICR(i2c)); in i2c_pxa_pio_set_master()
695 static int i2c_pxa_send_mastercode(struct pxa_i2c *i2c) in i2c_pxa_send_mastercode() argument
700 spin_lock_irq(&i2c->lock); in i2c_pxa_send_mastercode()
701 i2c->highmode_enter = true; in i2c_pxa_send_mastercode()
702 writel(i2c->master_code, _IDBR(i2c)); in i2c_pxa_send_mastercode()
704 icr = readl(_ICR(i2c)) & ~(ICR_STOP | ICR_ALDIE); in i2c_pxa_send_mastercode()
706 writel(icr, _ICR(i2c)); in i2c_pxa_send_mastercode()
708 spin_unlock_irq(&i2c->lock); in i2c_pxa_send_mastercode()
709 timeout = wait_event_timeout(i2c->wait, in i2c_pxa_send_mastercode()
710 i2c->highmode_enter == false, HZ * 1); in i2c_pxa_send_mastercode()
712 i2c->highmode_enter = false; in i2c_pxa_send_mastercode()
717 static int i2c_pxa_do_pio_xfer(struct pxa_i2c *i2c, in i2c_pxa_do_pio_xfer() argument
723 ret = i2c_pxa_pio_set_master(i2c); in i2c_pxa_do_pio_xfer()
727 i2c->msg = msg; in i2c_pxa_do_pio_xfer()
728 i2c->msg_num = num; in i2c_pxa_do_pio_xfer()
729 i2c->msg_idx = 0; in i2c_pxa_do_pio_xfer()
730 i2c->msg_ptr = 0; in i2c_pxa_do_pio_xfer()
731 i2c->irqlogidx = 0; in i2c_pxa_do_pio_xfer()
733 i2c_pxa_start_message(i2c); in i2c_pxa_do_pio_xfer()
735 while (i2c->msg_num > 0 && --timeout) { in i2c_pxa_do_pio_xfer()
736 i2c_pxa_handler(0, i2c); in i2c_pxa_do_pio_xfer()
740 i2c_pxa_stop_message(i2c); in i2c_pxa_do_pio_xfer()
745 ret = i2c->msg_idx; in i2c_pxa_do_pio_xfer()
749 i2c_pxa_scream_blue_murder(i2c, "timeout"); in i2c_pxa_do_pio_xfer()
757 static int i2c_pxa_do_xfer(struct pxa_i2c *i2c, struct i2c_msg *msg, int num) in i2c_pxa_do_xfer() argument
765 ret = i2c_pxa_wait_bus_not_busy(i2c); in i2c_pxa_do_xfer()
767 dev_err(&i2c->adap.dev, "i2c_pxa: timeout waiting for bus free\n"); in i2c_pxa_do_xfer()
774 ret = i2c_pxa_set_master(i2c); in i2c_pxa_do_xfer()
776 dev_err(&i2c->adap.dev, "i2c_pxa_set_master: error %d\n", ret); in i2c_pxa_do_xfer()
780 if (i2c->high_mode) { in i2c_pxa_do_xfer()
781 ret = i2c_pxa_send_mastercode(i2c); in i2c_pxa_do_xfer()
783 dev_err(&i2c->adap.dev, "i2c_pxa_send_mastercode timeout\n"); in i2c_pxa_do_xfer()
788 spin_lock_irq(&i2c->lock); in i2c_pxa_do_xfer()
790 i2c->msg = msg; in i2c_pxa_do_xfer()
791 i2c->msg_num = num; in i2c_pxa_do_xfer()
792 i2c->msg_idx = 0; in i2c_pxa_do_xfer()
793 i2c->msg_ptr = 0; in i2c_pxa_do_xfer()
794 i2c->irqlogidx = 0; in i2c_pxa_do_xfer()
796 i2c_pxa_start_message(i2c); in i2c_pxa_do_xfer()
798 spin_unlock_irq(&i2c->lock); in i2c_pxa_do_xfer()
803 timeout = wait_event_timeout(i2c->wait, i2c->msg_num == 0, HZ * 5); in i2c_pxa_do_xfer()
804 i2c_pxa_stop_message(i2c); in i2c_pxa_do_xfer()
809 ret = i2c->msg_idx; in i2c_pxa_do_xfer()
811 if (!timeout && i2c->msg_num) { in i2c_pxa_do_xfer()
812 i2c_pxa_scream_blue_murder(i2c, "timeout"); in i2c_pxa_do_xfer()
823 struct pxa_i2c *i2c = adap->algo_data; in i2c_pxa_pio_xfer() local
830 if (!(readl(_ICR(i2c)) & ICR_IUE)) in i2c_pxa_pio_xfer()
831 i2c_pxa_reset(i2c); in i2c_pxa_pio_xfer()
834 ret = i2c_pxa_do_pio_xfer(i2c, msgs, num); in i2c_pxa_pio_xfer()
842 i2c_pxa_scream_blue_murder(i2c, "exhausted retries"); in i2c_pxa_pio_xfer()
845 i2c_pxa_set_slave(i2c, ret); in i2c_pxa_pio_xfer()
852 static void i2c_pxa_master_complete(struct pxa_i2c *i2c, int ret) in i2c_pxa_master_complete() argument
854 i2c->msg_ptr = 0; in i2c_pxa_master_complete()
855 i2c->msg = NULL; in i2c_pxa_master_complete()
856 i2c->msg_idx ++; in i2c_pxa_master_complete()
857 i2c->msg_num = 0; in i2c_pxa_master_complete()
859 i2c->msg_idx = ret; in i2c_pxa_master_complete()
860 if (!i2c->use_pio) in i2c_pxa_master_complete()
861 wake_up(&i2c->wait); in i2c_pxa_master_complete()
864 static void i2c_pxa_irq_txempty(struct pxa_i2c *i2c, u32 isr) in i2c_pxa_irq_txempty() argument
866 u32 icr = readl(_ICR(i2c)) & ~(ICR_START|ICR_STOP|ICR_ACKNAK|ICR_TB); in i2c_pxa_irq_txempty()
877 i2c_pxa_scream_blue_murder(i2c, "ALD set"); in i2c_pxa_irq_txempty()
889 (!((i2c->msg->flags & I2C_M_IGNORE_NAK) && in i2c_pxa_irq_txempty()
899 if (i2c->msg_ptr == 0 && i2c->msg_idx == 0) in i2c_pxa_irq_txempty()
904 i2c_pxa_master_complete(i2c, ret); in i2c_pxa_irq_txempty()
910 if (i2c->msg_ptr == i2c->msg->len - 1 && in i2c_pxa_irq_txempty()
911 i2c->msg_idx == i2c->msg_num - 1) in i2c_pxa_irq_txempty()
915 } else if (i2c->msg_ptr < i2c->msg->len) { in i2c_pxa_irq_txempty()
919 writel(i2c->msg->buf[i2c->msg_ptr++], _IDBR(i2c)); in i2c_pxa_irq_txempty()
927 if ((i2c->msg_ptr == i2c->msg->len) && in i2c_pxa_irq_txempty()
928 ((i2c->msg->flags & I2C_M_STOP) || in i2c_pxa_irq_txempty()
929 (i2c->msg_idx == i2c->msg_num - 1))) in i2c_pxa_irq_txempty()
932 } else if (i2c->msg_idx < i2c->msg_num - 1) { in i2c_pxa_irq_txempty()
936 i2c->msg_ptr = 0; in i2c_pxa_irq_txempty()
937 i2c->msg_idx ++; in i2c_pxa_irq_txempty()
938 i2c->msg++; in i2c_pxa_irq_txempty()
945 if (i2c->msg->flags & I2C_M_NOSTART) in i2c_pxa_irq_txempty()
951 writel(i2c_pxa_addr_byte(i2c->msg), _IDBR(i2c)); in i2c_pxa_irq_txempty()
959 if (i2c->msg->len == 0) { in i2c_pxa_irq_txempty()
965 i2c_pxa_reset(i2c); in i2c_pxa_irq_txempty()
967 i2c_pxa_master_complete(i2c, 0); in i2c_pxa_irq_txempty()
970 i2c->icrlog[i2c->irqlogidx-1] = icr; in i2c_pxa_irq_txempty()
972 writel(icr, _ICR(i2c)); in i2c_pxa_irq_txempty()
973 show_state(i2c); in i2c_pxa_irq_txempty()
976 static void i2c_pxa_irq_rxfull(struct pxa_i2c *i2c, u32 isr) in i2c_pxa_irq_rxfull() argument
978 u32 icr = readl(_ICR(i2c)) & ~(ICR_START|ICR_STOP|ICR_ACKNAK|ICR_TB); in i2c_pxa_irq_rxfull()
983 i2c->msg->buf[i2c->msg_ptr++] = readl(_IDBR(i2c)); in i2c_pxa_irq_rxfull()
985 if (i2c->msg_ptr < i2c->msg->len) { in i2c_pxa_irq_rxfull()
990 if (i2c->msg_ptr == i2c->msg->len - 1) in i2c_pxa_irq_rxfull()
995 i2c_pxa_master_complete(i2c, 0); in i2c_pxa_irq_rxfull()
998 i2c->icrlog[i2c->irqlogidx-1] = icr; in i2c_pxa_irq_rxfull()
1000 writel(icr, _ICR(i2c)); in i2c_pxa_irq_rxfull()
1007 struct pxa_i2c *i2c = dev_id; in i2c_pxa_handler() local
1008 u32 isr = readl(_ISR(i2c)); in i2c_pxa_handler()
1014 dev_dbg(&i2c->adap.dev, "%s: ISR=%08x, ICR=%08x, IBMR=%02x\n", in i2c_pxa_handler()
1015 __func__, isr, readl(_ICR(i2c)), readl(_IBMR(i2c))); in i2c_pxa_handler()
1019 if (i2c->irqlogidx < ARRAY_SIZE(i2c->isrlog)) in i2c_pxa_handler()
1020 i2c->isrlog[i2c->irqlogidx++] = isr; in i2c_pxa_handler()
1022 show_state(i2c); in i2c_pxa_handler()
1027 writel(isr & VALID_INT_SOURCE, _ISR(i2c)); in i2c_pxa_handler()
1030 i2c_pxa_slave_start(i2c, isr); in i2c_pxa_handler()
1032 i2c_pxa_slave_stop(i2c); in i2c_pxa_handler()
1034 if (i2c_pxa_is_slavemode(i2c)) { in i2c_pxa_handler()
1036 i2c_pxa_slave_txempty(i2c, isr); in i2c_pxa_handler()
1038 i2c_pxa_slave_rxfull(i2c, isr); in i2c_pxa_handler()
1039 } else if (i2c->msg && (!i2c->highmode_enter)) { in i2c_pxa_handler()
1041 i2c_pxa_irq_txempty(i2c, isr); in i2c_pxa_handler()
1043 i2c_pxa_irq_rxfull(i2c, isr); in i2c_pxa_handler()
1044 } else if ((isr & ISR_ITE) && i2c->highmode_enter) { in i2c_pxa_handler()
1045 i2c->highmode_enter = false; in i2c_pxa_handler()
1046 wake_up(&i2c->wait); in i2c_pxa_handler()
1048 i2c_pxa_scream_blue_murder(i2c, "spurious irq"); in i2c_pxa_handler()
1057 struct pxa_i2c *i2c = adap->algo_data; in i2c_pxa_xfer() local
1061 ret = i2c_pxa_do_xfer(i2c, msgs, num); in i2c_pxa_xfer()
1069 i2c_pxa_scream_blue_murder(i2c, "exhausted retries"); in i2c_pxa_xfer()
1072 i2c_pxa_set_slave(i2c, ret); in i2c_pxa_xfer()
1100 static int i2c_pxa_probe_dt(struct platform_device *pdev, struct pxa_i2c *i2c, in i2c_pxa_probe_dt() argument
1111 i2c->adap.nr = -1; in i2c_pxa_probe_dt()
1114 i2c->use_pio = 1; in i2c_pxa_probe_dt()
1116 i2c->fast_mode = 1; in i2c_pxa_probe_dt()
1122 struct pxa_i2c *i2c, in i2c_pxa_probe_pdata() argument
1130 i2c->use_pio = plat->use_pio; in i2c_pxa_probe_pdata()
1131 i2c->fast_mode = plat->fast_mode; in i2c_pxa_probe_pdata()
1132 i2c->high_mode = plat->high_mode; in i2c_pxa_probe_pdata()
1133 i2c->master_code = plat->master_code; in i2c_pxa_probe_pdata()
1134 if (!i2c->master_code) in i2c_pxa_probe_pdata()
1135 i2c->master_code = 0xe; in i2c_pxa_probe_pdata()
1136 i2c->rate = plat->rate; in i2c_pxa_probe_pdata()
1145 struct pxa_i2c *i2c; in i2c_pxa_probe() local
1149 i2c = kzalloc(sizeof(struct pxa_i2c), GFP_KERNEL); in i2c_pxa_probe()
1150 if (!i2c) { in i2c_pxa_probe()
1156 i2c->adap.nr = dev->id; in i2c_pxa_probe()
1158 ret = i2c_pxa_probe_dt(dev, i2c, &i2c_type); in i2c_pxa_probe()
1160 ret = i2c_pxa_probe_pdata(dev, i2c, &i2c_type); in i2c_pxa_probe()
1176 i2c->adap.owner = THIS_MODULE; in i2c_pxa_probe()
1177 i2c->adap.retries = 5; in i2c_pxa_probe()
1179 spin_lock_init(&i2c->lock); in i2c_pxa_probe()
1180 init_waitqueue_head(&i2c->wait); in i2c_pxa_probe()
1182 strlcpy(i2c->adap.name, "pxa_i2c-i2c", sizeof(i2c->adap.name)); in i2c_pxa_probe()
1184 i2c->clk = clk_get(&dev->dev, NULL); in i2c_pxa_probe()
1185 if (IS_ERR(i2c->clk)) { in i2c_pxa_probe()
1186 ret = PTR_ERR(i2c->clk); in i2c_pxa_probe()
1190 i2c->reg_base = ioremap(res->start, resource_size(res)); in i2c_pxa_probe()
1191 if (!i2c->reg_base) { in i2c_pxa_probe()
1196 i2c->reg_ibmr = i2c->reg_base + pxa_reg_layout[i2c_type].ibmr; in i2c_pxa_probe()
1197 i2c->reg_idbr = i2c->reg_base + pxa_reg_layout[i2c_type].idbr; in i2c_pxa_probe()
1198 i2c->reg_icr = i2c->reg_base + pxa_reg_layout[i2c_type].icr; in i2c_pxa_probe()
1199 i2c->reg_isr = i2c->reg_base + pxa_reg_layout[i2c_type].isr; in i2c_pxa_probe()
1201 i2c->reg_isar = i2c->reg_base + pxa_reg_layout[i2c_type].isar; in i2c_pxa_probe()
1203 i2c->iobase = res->start; in i2c_pxa_probe()
1204 i2c->iosize = resource_size(res); in i2c_pxa_probe()
1206 i2c->irq = irq; in i2c_pxa_probe()
1208 i2c->slave_addr = I2C_PXA_SLAVE_ADDR; in i2c_pxa_probe()
1209 i2c->highmode_enter = false; in i2c_pxa_probe()
1213 i2c->slave_addr = plat->slave_addr; in i2c_pxa_probe()
1214 i2c->slave = plat->slave; in i2c_pxa_probe()
1216 i2c->adap.class = plat->class; in i2c_pxa_probe()
1219 if (i2c->high_mode) { in i2c_pxa_probe()
1220 if (i2c->rate) { in i2c_pxa_probe()
1221 clk_set_rate(i2c->clk, i2c->rate); in i2c_pxa_probe()
1223 i2c->adap.name, clk_get_rate(i2c->clk)); in i2c_pxa_probe()
1226 i2c->adap.name); in i2c_pxa_probe()
1229 clk_prepare_enable(i2c->clk); in i2c_pxa_probe()
1231 if (i2c->use_pio) { in i2c_pxa_probe()
1232 i2c->adap.algo = &i2c_pxa_pio_algorithm; in i2c_pxa_probe()
1234 i2c->adap.algo = &i2c_pxa_algorithm; in i2c_pxa_probe()
1236 dev_name(&dev->dev), i2c); in i2c_pxa_probe()
1241 i2c_pxa_reset(i2c); in i2c_pxa_probe()
1243 i2c->adap.algo_data = i2c; in i2c_pxa_probe()
1244 i2c->adap.dev.parent = &dev->dev; in i2c_pxa_probe()
1246 i2c->adap.dev.of_node = dev->dev.of_node; in i2c_pxa_probe()
1249 ret = i2c_add_numbered_adapter(&i2c->adap); in i2c_pxa_probe()
1255 platform_set_drvdata(dev, i2c); in i2c_pxa_probe()
1259 dev_name(&i2c->adap.dev), i2c->slave_addr); in i2c_pxa_probe()
1262 dev_name(&i2c->adap.dev)); in i2c_pxa_probe()
1267 if (!i2c->use_pio) in i2c_pxa_probe()
1268 free_irq(irq, i2c); in i2c_pxa_probe()
1270 clk_disable_unprepare(i2c->clk); in i2c_pxa_probe()
1271 iounmap(i2c->reg_base); in i2c_pxa_probe()
1273 clk_put(i2c->clk); in i2c_pxa_probe()
1275 kfree(i2c); in i2c_pxa_probe()
1283 struct pxa_i2c *i2c = platform_get_drvdata(dev); in i2c_pxa_remove() local
1285 i2c_del_adapter(&i2c->adap); in i2c_pxa_remove()
1286 if (!i2c->use_pio) in i2c_pxa_remove()
1287 free_irq(i2c->irq, i2c); in i2c_pxa_remove()
1289 clk_disable_unprepare(i2c->clk); in i2c_pxa_remove()
1290 clk_put(i2c->clk); in i2c_pxa_remove()
1292 iounmap(i2c->reg_base); in i2c_pxa_remove()
1293 release_mem_region(i2c->iobase, i2c->iosize); in i2c_pxa_remove()
1294 kfree(i2c); in i2c_pxa_remove()
1303 struct pxa_i2c *i2c = platform_get_drvdata(pdev); in i2c_pxa_suspend_noirq() local
1305 clk_disable(i2c->clk); in i2c_pxa_suspend_noirq()
1313 struct pxa_i2c *i2c = platform_get_drvdata(pdev); in i2c_pxa_resume_noirq() local
1315 clk_enable(i2c->clk); in i2c_pxa_resume_noirq()
1316 i2c_pxa_reset(i2c); in i2c_pxa_resume_noirq()