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