Lines Matching refs:i2c_dev
93 static void sprd_i2c_set_count(struct sprd_i2c *i2c_dev, u32 count) in sprd_i2c_set_count() argument
95 writel(count, i2c_dev->base + I2C_COUNT); in sprd_i2c_set_count()
98 static void sprd_i2c_send_stop(struct sprd_i2c *i2c_dev, int stop) in sprd_i2c_send_stop() argument
100 u32 tmp = readl(i2c_dev->base + I2C_CTL); in sprd_i2c_send_stop()
103 writel(tmp & ~STP_EN, i2c_dev->base + I2C_CTL); in sprd_i2c_send_stop()
105 writel(tmp | STP_EN, i2c_dev->base + I2C_CTL); in sprd_i2c_send_stop()
108 static void sprd_i2c_clear_start(struct sprd_i2c *i2c_dev) in sprd_i2c_clear_start() argument
110 u32 tmp = readl(i2c_dev->base + I2C_CTL); in sprd_i2c_clear_start()
112 writel(tmp & ~I2C_START, i2c_dev->base + I2C_CTL); in sprd_i2c_clear_start()
115 static void sprd_i2c_clear_ack(struct sprd_i2c *i2c_dev) in sprd_i2c_clear_ack() argument
117 u32 tmp = readl(i2c_dev->base + I2C_STATUS); in sprd_i2c_clear_ack()
119 writel(tmp & ~I2C_RX_ACK, i2c_dev->base + I2C_STATUS); in sprd_i2c_clear_ack()
122 static void sprd_i2c_clear_irq(struct sprd_i2c *i2c_dev) in sprd_i2c_clear_irq() argument
124 u32 tmp = readl(i2c_dev->base + I2C_STATUS); in sprd_i2c_clear_irq()
126 writel(tmp & ~I2C_INT, i2c_dev->base + I2C_STATUS); in sprd_i2c_clear_irq()
129 static void sprd_i2c_reset_fifo(struct sprd_i2c *i2c_dev) in sprd_i2c_reset_fifo() argument
131 writel(I2C_RST, i2c_dev->base + ADDR_RST); in sprd_i2c_reset_fifo()
134 static void sprd_i2c_set_devaddr(struct sprd_i2c *i2c_dev, struct i2c_msg *m) in sprd_i2c_set_devaddr() argument
136 writel(m->addr << 1, i2c_dev->base + I2C_ADDR_CFG); in sprd_i2c_set_devaddr()
139 static void sprd_i2c_write_bytes(struct sprd_i2c *i2c_dev, u8 *buf, u32 len) in sprd_i2c_write_bytes() argument
144 writeb(buf[i], i2c_dev->base + I2C_TX); in sprd_i2c_write_bytes()
147 static void sprd_i2c_read_bytes(struct sprd_i2c *i2c_dev, u8 *buf, u32 len) in sprd_i2c_read_bytes() argument
152 buf[i] = readb(i2c_dev->base + I2C_RX); in sprd_i2c_read_bytes()
155 static void sprd_i2c_set_full_thld(struct sprd_i2c *i2c_dev, u32 full_thld) in sprd_i2c_set_full_thld() argument
157 u32 tmp = readl(i2c_dev->base + I2C_CTL); in sprd_i2c_set_full_thld()
161 writel(tmp, i2c_dev->base + I2C_CTL); in sprd_i2c_set_full_thld()
164 static void sprd_i2c_set_empty_thld(struct sprd_i2c *i2c_dev, u32 empty_thld) in sprd_i2c_set_empty_thld() argument
166 u32 tmp = readl(i2c_dev->base + I2C_CTL); in sprd_i2c_set_empty_thld()
170 writel(tmp, i2c_dev->base + I2C_CTL); in sprd_i2c_set_empty_thld()
173 static void sprd_i2c_set_fifo_full_int(struct sprd_i2c *i2c_dev, int enable) in sprd_i2c_set_fifo_full_int() argument
175 u32 tmp = readl(i2c_dev->base + I2C_CTL); in sprd_i2c_set_fifo_full_int()
182 writel(tmp, i2c_dev->base + I2C_CTL); in sprd_i2c_set_fifo_full_int()
185 static void sprd_i2c_set_fifo_empty_int(struct sprd_i2c *i2c_dev, int enable) in sprd_i2c_set_fifo_empty_int() argument
187 u32 tmp = readl(i2c_dev->base + I2C_CTL); in sprd_i2c_set_fifo_empty_int()
194 writel(tmp, i2c_dev->base + I2C_CTL); in sprd_i2c_set_fifo_empty_int()
197 static void sprd_i2c_opt_start(struct sprd_i2c *i2c_dev) in sprd_i2c_opt_start() argument
199 u32 tmp = readl(i2c_dev->base + I2C_CTL); in sprd_i2c_opt_start()
201 writel(tmp | I2C_START, i2c_dev->base + I2C_CTL); in sprd_i2c_opt_start()
204 static void sprd_i2c_opt_mode(struct sprd_i2c *i2c_dev, int rw) in sprd_i2c_opt_mode() argument
206 u32 cmd = readl(i2c_dev->base + I2C_CTL) & ~I2C_MODE; in sprd_i2c_opt_mode()
208 writel(cmd | rw << 3, i2c_dev->base + I2C_CTL); in sprd_i2c_opt_mode()
211 static void sprd_i2c_data_transfer(struct sprd_i2c *i2c_dev) in sprd_i2c_data_transfer() argument
213 u32 i2c_count = i2c_dev->count; in sprd_i2c_data_transfer()
215 struct i2c_msg *msg = i2c_dev->msg; in sprd_i2c_data_transfer()
218 sprd_i2c_read_bytes(i2c_dev, i2c_dev->buf, I2C_FIFO_FULL_THLD); in sprd_i2c_data_transfer()
219 i2c_dev->count -= I2C_FIFO_FULL_THLD; in sprd_i2c_data_transfer()
220 i2c_dev->buf += I2C_FIFO_FULL_THLD; in sprd_i2c_data_transfer()
227 if (i2c_dev->count >= I2C_FIFO_FULL_THLD) in sprd_i2c_data_transfer()
228 sprd_i2c_set_fifo_full_int(i2c_dev, 1); in sprd_i2c_data_transfer()
230 sprd_i2c_write_bytes(i2c_dev, i2c_dev->buf, need_tran); in sprd_i2c_data_transfer()
231 i2c_dev->buf += need_tran; in sprd_i2c_data_transfer()
232 i2c_dev->count -= need_tran; in sprd_i2c_data_transfer()
240 sprd_i2c_set_fifo_empty_int(i2c_dev, 1); in sprd_i2c_data_transfer()
247 struct sprd_i2c *i2c_dev = i2c_adap->algo_data; in sprd_i2c_handle_msg() local
250 i2c_dev->msg = msg; in sprd_i2c_handle_msg()
251 i2c_dev->buf = msg->buf; in sprd_i2c_handle_msg()
252 i2c_dev->count = msg->len; in sprd_i2c_handle_msg()
254 reinit_completion(&i2c_dev->complete); in sprd_i2c_handle_msg()
255 sprd_i2c_reset_fifo(i2c_dev); in sprd_i2c_handle_msg()
256 sprd_i2c_set_devaddr(i2c_dev, msg); in sprd_i2c_handle_msg()
257 sprd_i2c_set_count(i2c_dev, msg->len); in sprd_i2c_handle_msg()
260 sprd_i2c_opt_mode(i2c_dev, 1); in sprd_i2c_handle_msg()
261 sprd_i2c_send_stop(i2c_dev, 1); in sprd_i2c_handle_msg()
263 sprd_i2c_opt_mode(i2c_dev, 0); in sprd_i2c_handle_msg()
264 sprd_i2c_send_stop(i2c_dev, !!is_last_msg); in sprd_i2c_handle_msg()
272 sprd_i2c_set_fifo_full_int(i2c_dev, 1); in sprd_i2c_handle_msg()
274 sprd_i2c_data_transfer(i2c_dev); in sprd_i2c_handle_msg()
276 sprd_i2c_opt_start(i2c_dev); in sprd_i2c_handle_msg()
278 time_left = wait_for_completion_timeout(&i2c_dev->complete, in sprd_i2c_handle_msg()
283 return i2c_dev->err; in sprd_i2c_handle_msg()
289 struct sprd_i2c *i2c_dev = i2c_adap->algo_data; in sprd_i2c_master_xfer() local
292 ret = pm_runtime_resume_and_get(i2c_dev->dev); in sprd_i2c_master_xfer()
305 pm_runtime_mark_last_busy(i2c_dev->dev); in sprd_i2c_master_xfer()
306 pm_runtime_put_autosuspend(i2c_dev->dev); in sprd_i2c_master_xfer()
321 static void sprd_i2c_set_clk(struct sprd_i2c *i2c_dev, u32 freq) in sprd_i2c_set_clk() argument
323 u32 apb_clk = i2c_dev->src_clk; in sprd_i2c_set_clk()
341 writel(div0, i2c_dev->base + ADDR_DVD0); in sprd_i2c_set_clk()
342 writel(div1, i2c_dev->base + ADDR_DVD1); in sprd_i2c_set_clk()
346 writel((6 * apb_clk) / 10000000, i2c_dev->base + ADDR_STA0_DVD); in sprd_i2c_set_clk()
348 writel((4 * apb_clk) / 1000000, i2c_dev->base + ADDR_STA0_DVD); in sprd_i2c_set_clk()
351 static void sprd_i2c_enable(struct sprd_i2c *i2c_dev) in sprd_i2c_enable() argument
355 writel(tmp, i2c_dev->base + I2C_CTL); in sprd_i2c_enable()
357 sprd_i2c_set_full_thld(i2c_dev, I2C_FIFO_FULL_THLD); in sprd_i2c_enable()
358 sprd_i2c_set_empty_thld(i2c_dev, I2C_FIFO_EMPTY_THLD); in sprd_i2c_enable()
360 sprd_i2c_set_clk(i2c_dev, i2c_dev->bus_freq); in sprd_i2c_enable()
361 sprd_i2c_reset_fifo(i2c_dev); in sprd_i2c_enable()
362 sprd_i2c_clear_irq(i2c_dev); in sprd_i2c_enable()
364 tmp = readl(i2c_dev->base + I2C_CTL); in sprd_i2c_enable()
365 writel(tmp | I2C_EN | I2C_INT_EN, i2c_dev->base + I2C_CTL); in sprd_i2c_enable()
370 struct sprd_i2c *i2c_dev = dev_id; in sprd_i2c_isr_thread() local
371 struct i2c_msg *msg = i2c_dev->msg; in sprd_i2c_isr_thread()
372 bool ack = !(readl(i2c_dev->base + I2C_STATUS) & I2C_RX_ACK); in sprd_i2c_isr_thread()
376 i2c_tran = i2c_dev->count >= I2C_FIFO_FULL_THLD; in sprd_i2c_isr_thread()
378 i2c_tran = i2c_dev->count; in sprd_i2c_isr_thread()
389 sprd_i2c_data_transfer(i2c_dev); in sprd_i2c_isr_thread()
393 i2c_dev->err = 0; in sprd_i2c_isr_thread()
400 i2c_dev->err = -EIO; in sprd_i2c_isr_thread()
401 else if (msg->flags & I2C_M_RD && i2c_dev->count) in sprd_i2c_isr_thread()
402 sprd_i2c_read_bytes(i2c_dev, i2c_dev->buf, i2c_dev->count); in sprd_i2c_isr_thread()
405 sprd_i2c_clear_ack(i2c_dev); in sprd_i2c_isr_thread()
406 sprd_i2c_clear_start(i2c_dev); in sprd_i2c_isr_thread()
407 complete(&i2c_dev->complete); in sprd_i2c_isr_thread()
414 struct sprd_i2c *i2c_dev = dev_id; in sprd_i2c_isr() local
415 struct i2c_msg *msg = i2c_dev->msg; in sprd_i2c_isr()
416 bool ack = !(readl(i2c_dev->base + I2C_STATUS) & I2C_RX_ACK); in sprd_i2c_isr()
420 i2c_tran = i2c_dev->count >= I2C_FIFO_FULL_THLD; in sprd_i2c_isr()
422 i2c_tran = i2c_dev->count; in sprd_i2c_isr()
436 sprd_i2c_clear_start(i2c_dev); in sprd_i2c_isr()
437 sprd_i2c_clear_irq(i2c_dev); in sprd_i2c_isr()
440 sprd_i2c_set_fifo_empty_int(i2c_dev, 0); in sprd_i2c_isr()
441 sprd_i2c_set_fifo_full_int(i2c_dev, 0); in sprd_i2c_isr()
446 static int sprd_i2c_clk_init(struct sprd_i2c *i2c_dev) in sprd_i2c_clk_init() argument
450 clk_i2c = devm_clk_get(i2c_dev->dev, "i2c"); in sprd_i2c_clk_init()
452 dev_warn(i2c_dev->dev, "i2c%d can't get the i2c clock\n", in sprd_i2c_clk_init()
453 i2c_dev->adap.nr); in sprd_i2c_clk_init()
457 clk_parent = devm_clk_get(i2c_dev->dev, "source"); in sprd_i2c_clk_init()
459 dev_warn(i2c_dev->dev, "i2c%d can't get the source clock\n", in sprd_i2c_clk_init()
460 i2c_dev->adap.nr); in sprd_i2c_clk_init()
465 i2c_dev->src_clk = clk_get_rate(clk_i2c); in sprd_i2c_clk_init()
467 i2c_dev->src_clk = 26000000; in sprd_i2c_clk_init()
469 dev_dbg(i2c_dev->dev, "i2c%d set source clock is %d\n", in sprd_i2c_clk_init()
470 i2c_dev->adap.nr, i2c_dev->src_clk); in sprd_i2c_clk_init()
472 i2c_dev->clk = devm_clk_get(i2c_dev->dev, "enable"); in sprd_i2c_clk_init()
473 if (IS_ERR(i2c_dev->clk)) { in sprd_i2c_clk_init()
474 dev_err(i2c_dev->dev, "i2c%d can't get the enable clock\n", in sprd_i2c_clk_init()
475 i2c_dev->adap.nr); in sprd_i2c_clk_init()
476 return PTR_ERR(i2c_dev->clk); in sprd_i2c_clk_init()
485 struct sprd_i2c *i2c_dev; in sprd_i2c_probe() local
491 i2c_dev = devm_kzalloc(dev, sizeof(struct sprd_i2c), GFP_KERNEL); in sprd_i2c_probe()
492 if (!i2c_dev) in sprd_i2c_probe()
495 i2c_dev->base = devm_platform_ioremap_resource(pdev, 0); in sprd_i2c_probe()
496 if (IS_ERR(i2c_dev->base)) in sprd_i2c_probe()
497 return PTR_ERR(i2c_dev->base); in sprd_i2c_probe()
499 i2c_dev->irq = platform_get_irq(pdev, 0); in sprd_i2c_probe()
500 if (i2c_dev->irq < 0) in sprd_i2c_probe()
501 return i2c_dev->irq; in sprd_i2c_probe()
503 i2c_set_adapdata(&i2c_dev->adap, i2c_dev); in sprd_i2c_probe()
504 init_completion(&i2c_dev->complete); in sprd_i2c_probe()
505 snprintf(i2c_dev->adap.name, sizeof(i2c_dev->adap.name), in sprd_i2c_probe()
508 i2c_dev->bus_freq = I2C_MAX_STANDARD_MODE_FREQ; in sprd_i2c_probe()
509 i2c_dev->adap.owner = THIS_MODULE; in sprd_i2c_probe()
510 i2c_dev->dev = dev; in sprd_i2c_probe()
511 i2c_dev->adap.retries = 3; in sprd_i2c_probe()
512 i2c_dev->adap.algo = &sprd_i2c_algo; in sprd_i2c_probe()
513 i2c_dev->adap.algo_data = i2c_dev; in sprd_i2c_probe()
514 i2c_dev->adap.dev.parent = dev; in sprd_i2c_probe()
515 i2c_dev->adap.nr = pdev->id; in sprd_i2c_probe()
516 i2c_dev->adap.dev.of_node = dev->of_node; in sprd_i2c_probe()
519 i2c_dev->bus_freq = prop; in sprd_i2c_probe()
522 if (i2c_dev->bus_freq != I2C_MAX_STANDARD_MODE_FREQ && in sprd_i2c_probe()
523 i2c_dev->bus_freq != I2C_MAX_FAST_MODE_FREQ) in sprd_i2c_probe()
526 ret = sprd_i2c_clk_init(i2c_dev); in sprd_i2c_probe()
530 platform_set_drvdata(pdev, i2c_dev); in sprd_i2c_probe()
532 ret = clk_prepare_enable(i2c_dev->clk); in sprd_i2c_probe()
536 sprd_i2c_enable(i2c_dev); in sprd_i2c_probe()
538 pm_runtime_set_autosuspend_delay(i2c_dev->dev, SPRD_I2C_PM_TIMEOUT); in sprd_i2c_probe()
539 pm_runtime_use_autosuspend(i2c_dev->dev); in sprd_i2c_probe()
540 pm_runtime_set_active(i2c_dev->dev); in sprd_i2c_probe()
541 pm_runtime_enable(i2c_dev->dev); in sprd_i2c_probe()
543 ret = pm_runtime_get_sync(i2c_dev->dev); in sprd_i2c_probe()
547 ret = devm_request_threaded_irq(dev, i2c_dev->irq, in sprd_i2c_probe()
550 pdev->name, i2c_dev); in sprd_i2c_probe()
552 dev_err(&pdev->dev, "failed to request irq %d\n", i2c_dev->irq); in sprd_i2c_probe()
556 ret = i2c_add_numbered_adapter(&i2c_dev->adap); in sprd_i2c_probe()
562 pm_runtime_mark_last_busy(i2c_dev->dev); in sprd_i2c_probe()
563 pm_runtime_put_autosuspend(i2c_dev->dev); in sprd_i2c_probe()
567 pm_runtime_put_noidle(i2c_dev->dev); in sprd_i2c_probe()
568 pm_runtime_disable(i2c_dev->dev); in sprd_i2c_probe()
569 clk_disable_unprepare(i2c_dev->clk); in sprd_i2c_probe()
575 struct sprd_i2c *i2c_dev = platform_get_drvdata(pdev); in sprd_i2c_remove() local
578 ret = pm_runtime_get_sync(i2c_dev->dev); in sprd_i2c_remove()
582 i2c_del_adapter(&i2c_dev->adap); in sprd_i2c_remove()
585 clk_disable_unprepare(i2c_dev->clk); in sprd_i2c_remove()
587 pm_runtime_put_noidle(i2c_dev->dev); in sprd_i2c_remove()
588 pm_runtime_disable(i2c_dev->dev); in sprd_i2c_remove()
595 struct sprd_i2c *i2c_dev = dev_get_drvdata(dev); in sprd_i2c_suspend_noirq() local
597 i2c_mark_adapter_suspended(&i2c_dev->adap); in sprd_i2c_suspend_noirq()
603 struct sprd_i2c *i2c_dev = dev_get_drvdata(dev); in sprd_i2c_resume_noirq() local
605 i2c_mark_adapter_resumed(&i2c_dev->adap); in sprd_i2c_resume_noirq()
611 struct sprd_i2c *i2c_dev = dev_get_drvdata(dev); in sprd_i2c_runtime_suspend() local
613 clk_disable_unprepare(i2c_dev->clk); in sprd_i2c_runtime_suspend()
620 struct sprd_i2c *i2c_dev = dev_get_drvdata(dev); in sprd_i2c_runtime_resume() local
623 ret = clk_prepare_enable(i2c_dev->clk); in sprd_i2c_runtime_resume()
627 sprd_i2c_enable(i2c_dev); in sprd_i2c_runtime_resume()