Lines Matching refs:dev
121 struct device *dev;
169 static void i2c_davinci_calc_clk_dividers(struct davinci_i2c_dev *dev)
171 struct davinci_i2c_platform_data *pdata = dev->pdata;
177 u32 input_clock = clk_get_rate(dev->clk);
178 struct device_node *of_node = dev->dev->of_node;
244 davinci_i2c_write_reg(dev, DAVINCI_I2C_PSC_REG, psc);
245 davinci_i2c_write_reg(dev, DAVINCI_I2C_CLKH_REG, clkh);
246 davinci_i2c_write_reg(dev, DAVINCI_I2C_CLKL_REG, clkl);
248 dev_dbg(dev->dev, "input_clock = %d, CLK = %d\n", input_clock, clk);
256 static int i2c_davinci_init(struct davinci_i2c_dev *dev)
258 struct davinci_i2c_platform_data *pdata = dev->pdata;
261 davinci_i2c_reset_ctrl(dev, 0);
264 i2c_davinci_calc_clk_dividers(dev);
269 davinci_i2c_write_reg(dev, DAVINCI_I2C_OAR_REG, DAVINCI_I2C_OWN_ADDRESS);
271 dev_dbg(dev->dev, "PSC = %d\n",
272 davinci_i2c_read_reg(dev, DAVINCI_I2C_PSC_REG));
273 dev_dbg(dev->dev, "CLKL = %d\n",
274 davinci_i2c_read_reg(dev, DAVINCI_I2C_CLKL_REG));
275 dev_dbg(dev->dev, "CLKH = %d\n",
276 davinci_i2c_read_reg(dev, DAVINCI_I2C_CLKH_REG));
277 dev_dbg(dev->dev, "bus_freq = %dkHz, bus_delay = %d\n",
282 davinci_i2c_reset_ctrl(dev, 1);
285 davinci_i2c_write_reg(dev, DAVINCI_I2C_IMR_REG, I2C_DAVINCI_INTR_ALL);
296 struct davinci_i2c_dev *dev = i2c_get_adapdata(adap);
299 davinci_i2c_write_reg(dev, DAVINCI_I2C_IMR_REG, 0);
302 davinci_i2c_reset_ctrl(dev, 0);
307 struct davinci_i2c_dev *dev = i2c_get_adapdata(adap);
309 i2c_davinci_init(dev);
320 struct davinci_i2c_dev *dev = i2c_get_adapdata(adap);
323 davinci_i2c_write_reg(dev, DAVINCI_I2C_DSET_REG,
326 davinci_i2c_write_reg(dev, DAVINCI_I2C_DCLR_REG,
332 struct davinci_i2c_dev *dev = i2c_get_adapdata(adap);
336 val = davinci_i2c_read_reg(dev, DAVINCI_I2C_DIN_REG);
342 struct davinci_i2c_dev *dev = i2c_get_adapdata(adap);
346 val = davinci_i2c_read_reg(dev, DAVINCI_I2C_DIN_REG);
352 struct davinci_i2c_dev *dev = i2c_get_adapdata(adap);
357 davinci_i2c_write_reg(dev, DAVINCI_I2C_DIR_REG, DAVINCI_I2C_DIR_PDIR0);
360 davinci_i2c_write_reg(dev, DAVINCI_I2C_FUNC_REG,
366 struct davinci_i2c_dev *dev = i2c_get_adapdata(adap);
369 davinci_i2c_write_reg(dev, DAVINCI_I2C_FUNC_REG, 0);
386 static int i2c_davinci_wait_bus_not_busy(struct davinci_i2c_dev *dev)
388 unsigned long timeout = jiffies + dev->adapter.timeout;
391 if (!(davinci_i2c_read_reg(dev, DAVINCI_I2C_STR_REG) & DAVINCI_I2C_STR_BB))
396 dev_warn(dev->dev, "timeout waiting for bus ready\n");
397 i2c_recover_bus(&dev->adapter);
403 if (davinci_i2c_read_reg(dev, DAVINCI_I2C_STR_REG) & DAVINCI_I2C_STR_BB)
416 struct davinci_i2c_dev *dev = i2c_get_adapdata(adap);
417 struct davinci_i2c_platform_data *pdata = dev->pdata;
423 dev_warn(dev->dev, "transfer to own address aborted\n");
432 davinci_i2c_write_reg(dev, DAVINCI_I2C_SAR_REG, msg->addr);
434 dev->buf = msg->buf;
435 dev->buf_len = msg->len;
436 dev->stop = stop;
438 davinci_i2c_write_reg(dev, DAVINCI_I2C_CNT_REG, dev->buf_len);
440 reinit_completion(&dev->cmd_complete);
441 dev->cmd_err = 0;
455 w = davinci_i2c_read_reg(dev, DAVINCI_I2C_IMR_REG);
460 davinci_i2c_write_reg(dev, DAVINCI_I2C_IMR_REG, w);
462 dev->terminate = 0;
469 davinci_i2c_write_reg(dev, DAVINCI_I2C_MDR_REG, flag);
478 if ((!(msg->flags & I2C_M_RD)) && dev->buf_len) {
479 davinci_i2c_write_reg(dev, DAVINCI_I2C_DXR_REG, *dev->buf++);
480 dev->buf_len--;
487 davinci_i2c_write_reg(dev, DAVINCI_I2C_MDR_REG, flag);
489 time_left = wait_for_completion_timeout(&dev->cmd_complete,
490 dev->adapter.timeout);
492 dev_err(dev->dev, "controller timed out\n");
494 dev->buf_len = 0;
497 if (dev->buf_len) {
499 * or dev->cmd_err denotes an error.
501 dev_err(dev->dev, "abnormal termination buf_len=%zu\n",
502 dev->buf_len);
503 dev->terminate = 1;
505 dev->buf_len = 0;
510 if (likely(!dev->cmd_err))
514 if (dev->cmd_err & DAVINCI_I2C_STR_AL) {
515 i2c_davinci_init(dev);
519 if (dev->cmd_err & DAVINCI_I2C_STR_NACK) {
522 w = davinci_i2c_read_reg(dev, DAVINCI_I2C_MDR_REG);
524 davinci_i2c_write_reg(dev, DAVINCI_I2C_MDR_REG, w);
536 struct davinci_i2c_dev *dev = i2c_get_adapdata(adap);
540 dev_dbg(dev->dev, "%s: msgs: %d\n", __func__, num);
542 ret = pm_runtime_resume_and_get(dev->dev);
544 dev_err(dev->dev, "Failed to runtime_get device: %d\n", ret);
548 ret = i2c_davinci_wait_bus_not_busy(dev);
550 dev_warn(dev->dev, "timeout waiting for bus ready\n");
556 dev_dbg(dev->dev, "%s [%d/%d] ret: %d\n", __func__, i + 1, num,
565 pm_runtime_mark_last_busy(dev->dev);
566 pm_runtime_put_autosuspend(dev->dev);
576 static void terminate_read(struct davinci_i2c_dev *dev)
578 u16 w = davinci_i2c_read_reg(dev, DAVINCI_I2C_MDR_REG);
580 davinci_i2c_write_reg(dev, DAVINCI_I2C_MDR_REG, w);
583 davinci_i2c_read_reg(dev, DAVINCI_I2C_DRR_REG);
584 if (!dev->terminate)
585 dev_err(dev->dev, "RDR IRQ while no data requested\n");
587 static void terminate_write(struct davinci_i2c_dev *dev)
589 u16 w = davinci_i2c_read_reg(dev, DAVINCI_I2C_MDR_REG);
591 davinci_i2c_write_reg(dev, DAVINCI_I2C_MDR_REG, w);
593 if (!dev->terminate)
594 dev_dbg(dev->dev, "TDR IRQ while no data to send\n");
603 struct davinci_i2c_dev *dev = dev_id;
608 if (pm_runtime_suspended(dev->dev))
611 while ((stat = davinci_i2c_read_reg(dev, DAVINCI_I2C_IVR_REG))) {
612 dev_dbg(dev->dev, "%s: stat=0x%x\n", __func__, stat);
614 dev_warn(dev->dev, "Too much work in one IRQ\n");
621 dev->cmd_err |= DAVINCI_I2C_STR_AL;
622 dev->buf_len = 0;
623 complete(&dev->cmd_complete);
627 dev->cmd_err |= DAVINCI_I2C_STR_NACK;
628 dev->buf_len = 0;
629 complete(&dev->cmd_complete);
633 davinci_i2c_write_reg(dev,
635 if (((dev->buf_len == 0) && (dev->stop != 0)) ||
636 (dev->cmd_err & DAVINCI_I2C_STR_NACK)) {
637 w = davinci_i2c_read_reg(dev,
640 davinci_i2c_write_reg(dev,
643 complete(&dev->cmd_complete);
647 if (dev->buf_len) {
648 *dev->buf++ =
649 davinci_i2c_read_reg(dev,
651 dev->buf_len--;
652 if (dev->buf_len)
655 davinci_i2c_write_reg(dev,
660 terminate_read(dev);
665 if (dev->buf_len) {
666 davinci_i2c_write_reg(dev, DAVINCI_I2C_DXR_REG,
667 *dev->buf++);
668 dev->buf_len--;
669 if (dev->buf_len)
672 w = davinci_i2c_read_reg(dev,
675 davinci_i2c_write_reg(dev,
680 terminate_write(dev);
685 davinci_i2c_write_reg(dev,
687 complete(&dev->cmd_complete);
691 dev_dbg(dev->dev, "Address as slave interrupt\n");
695 dev_warn(dev->dev, "Unrecognized irq stat %d\n", stat);
707 struct davinci_i2c_dev *dev;
709 dev = container_of(nb, struct davinci_i2c_dev, freq_transition);
711 i2c_lock_bus(&dev->adapter, I2C_LOCK_ROOT_ADAPTER);
713 davinci_i2c_reset_ctrl(dev, 0);
715 i2c_davinci_calc_clk_dividers(dev);
716 davinci_i2c_reset_ctrl(dev, 1);
718 i2c_unlock_bus(&dev->adapter, I2C_LOCK_ROOT_ADAPTER);
723 static inline int i2c_davinci_cpufreq_register(struct davinci_i2c_dev *dev)
725 dev->freq_transition.notifier_call = i2c_davinci_cpufreq_transition;
727 return cpufreq_register_notifier(&dev->freq_transition,
731 static inline void i2c_davinci_cpufreq_deregister(struct davinci_i2c_dev *dev)
733 cpufreq_unregister_notifier(&dev->freq_transition,
737 static inline int i2c_davinci_cpufreq_register(struct davinci_i2c_dev *dev)
742 static inline void i2c_davinci_cpufreq_deregister(struct davinci_i2c_dev *dev)
761 struct davinci_i2c_dev *dev;
770 dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
771 if (!dev)
774 init_completion(&dev->cmd_complete);
776 dev->dev = &pdev->dev;
777 dev->irq = irq;
778 dev->pdata = dev_get_platdata(&pdev->dev);
779 platform_set_drvdata(pdev, dev);
781 if (!dev->pdata && pdev->dev.of_node) {
784 dev->pdata = devm_kzalloc(&pdev->dev,
786 if (!dev->pdata)
789 memcpy(dev->pdata, &davinci_i2c_platform_data_default,
791 if (!of_property_read_u32(pdev->dev.of_node, "clock-frequency",
793 dev->pdata->bus_freq = prop / 1000;
795 dev->pdata->has_pfunc =
796 of_property_read_bool(pdev->dev.of_node,
798 } else if (!dev->pdata) {
799 dev->pdata = &davinci_i2c_platform_data_default;
802 dev->clk = devm_clk_get(&pdev->dev, NULL);
803 if (IS_ERR(dev->clk))
804 return PTR_ERR(dev->clk);
806 dev->base = devm_platform_ioremap_resource(pdev, 0);
807 if (IS_ERR(dev->base)) {
808 return PTR_ERR(dev->base);
811 pm_runtime_set_autosuspend_delay(dev->dev,
813 pm_runtime_use_autosuspend(dev->dev);
815 pm_runtime_enable(dev->dev);
817 r = pm_runtime_resume_and_get(dev->dev);
819 dev_err(dev->dev, "failed to runtime_get device: %d\n", r);
823 i2c_davinci_init(dev);
825 r = devm_request_irq(&pdev->dev, dev->irq, i2c_davinci_isr, 0,
826 pdev->name, dev);
828 dev_err(&pdev->dev, "failure requesting irq %i\n", dev->irq);
832 r = i2c_davinci_cpufreq_register(dev);
834 dev_err(&pdev->dev, "failed to register cpufreq\n");
838 adap = &dev->adapter;
839 i2c_set_adapdata(adap, dev);
844 adap->dev.parent = &pdev->dev;
846 adap->dev.of_node = pdev->dev.of_node;
848 if (dev->pdata->has_pfunc)
850 else if (dev->pdata->gpio_recovery) {
853 rinfo->scl_gpiod = devm_gpiod_get(&pdev->dev, "scl",
859 rinfo->sda_gpiod = devm_gpiod_get(&pdev->dev, "sda", GPIOD_IN);
871 pm_runtime_mark_last_busy(dev->dev);
872 pm_runtime_put_autosuspend(dev->dev);
877 pm_runtime_dont_use_autosuspend(dev->dev);
878 pm_runtime_put_sync(dev->dev);
880 pm_runtime_disable(dev->dev);
887 struct davinci_i2c_dev *dev = platform_get_drvdata(pdev);
890 i2c_davinci_cpufreq_deregister(dev);
892 i2c_del_adapter(&dev->adapter);
894 ret = pm_runtime_get_sync(&pdev->dev);
896 dev_err(&pdev->dev, "Failed to resume device\n");
898 davinci_i2c_write_reg(dev, DAVINCI_I2C_MDR_REG, 0);
900 pm_runtime_dont_use_autosuspend(dev->dev);
901 pm_runtime_put_sync(dev->dev);
902 pm_runtime_disable(dev->dev);
905 static int davinci_i2c_suspend(struct device *dev)
907 struct davinci_i2c_dev *i2c_dev = dev_get_drvdata(dev);
915 static int davinci_i2c_resume(struct device *dev)
917 struct davinci_i2c_dev *i2c_dev = dev_get_drvdata(dev);