96 	struct s3c24xx_spi *hw = to_hw(spi);  in s3c24xx_spi_chipsel()  local
103 		hw->set_cs(hw->pdata, spi->chip_select, cspol^1);  in s3c24xx_spi_chipsel()
104 		writeb(cs->spcon, hw->regs + S3C2410_SPCON);  in s3c24xx_spi_chipsel()
109 		       hw->regs + S3C2410_SPCON);  in s3c24xx_spi_chipsel()
110 		hw->set_cs(hw->pdata, spi->chip_select, cspol);  in s3c24xx_spi_chipsel()
118 	struct s3c24xx_spi *hw = to_hw(spi);  in s3c24xx_spi_update_state()  local
143 		clk = clk_get_rate(hw->clk);  in s3c24xx_spi_update_state()
163 	struct s3c24xx_spi *hw = to_hw(spi);  in s3c24xx_spi_setupxfer()  local
168 		writeb(cs->sppre, hw->regs + S3C2410_SPPRE);  in s3c24xx_spi_setupxfer()
176 	struct s3c24xx_spi *hw = to_hw(spi);  in s3c24xx_spi_setup()  local
197 	mutex_lock(&hw->bitbang.lock);  in s3c24xx_spi_setup()
198 	if (!hw->bitbang.busy) {  in s3c24xx_spi_setup()
199 		hw->bitbang.chipselect(spi, BITBANG_CS_INACTIVE);  in s3c24xx_spi_setup()
202 	mutex_unlock(&hw->bitbang.lock);  in s3c24xx_spi_setup()
207 static inline unsigned int hw_txbyte(struct s3c24xx_spi *hw, int count)  in hw_txbyte()  argument
209 	return hw->tx ? hw->tx[count] : 0;  in hw_txbyte()
250  * @hw: The hardware state.
259 static void s3c24xx_spi_tryfiq(struct s3c24xx_spi *hw)  in s3c24xx_spi_tryfiq()  argument
266 	if (!hw->fiq_claimed) {  in s3c24xx_spi_tryfiq()
270 		ret = claim_fiq(&hw->fiq_handler);  in s3c24xx_spi_tryfiq()
275 	if (hw->tx && !hw->rx)  in s3c24xx_spi_tryfiq()
277 	else if (hw->rx && !hw->tx)  in s3c24xx_spi_tryfiq()
282 	regs.uregs[fiq_rspi] = (long)hw->regs;  in s3c24xx_spi_tryfiq()
283 	regs.uregs[fiq_rrx]  = (long)hw->rx;  in s3c24xx_spi_tryfiq()
284 	regs.uregs[fiq_rtx]  = (long)hw->tx + 1;  in s3c24xx_spi_tryfiq()
285 	regs.uregs[fiq_rcount] = hw->len - 1;  in s3c24xx_spi_tryfiq()
290 	if (hw->fiq_mode != mode) {  in s3c24xx_spi_tryfiq()
293 		hw->fiq_mode = mode;  in s3c24xx_spi_tryfiq()
312 		*ack_ptr = ack_bit(hw->irq);  in s3c24xx_spi_tryfiq()
317 	s3c24xx_set_fiq(hw->irq, true);  in s3c24xx_spi_tryfiq()
319 	hw->fiq_mode = mode;  in s3c24xx_spi_tryfiq()
320 	hw->fiq_inuse = 1;  in s3c24xx_spi_tryfiq()
334 	struct s3c24xx_spi *hw = pw;  in s3c24xx_spi_fiqop()  local
338 		if (hw->fiq_inuse)  in s3c24xx_spi_fiqop()
344 		hw->fiq_mode = FIQ_MODE_NONE;  in s3c24xx_spi_fiqop()
345 		hw->fiq_claimed = 0;  in s3c24xx_spi_fiqop()
347 		hw->fiq_claimed = 1;  in s3c24xx_spi_fiqop()
355  * @hw: The hardware state.
359 static inline void s3c24xx_spi_initfiq(struct s3c24xx_spi *hw)  in s3c24xx_spi_initfiq()  argument
361 	hw->fiq_handler.dev_id = hw;  in s3c24xx_spi_initfiq()
362 	hw->fiq_handler.name = dev_name(hw->dev);  in s3c24xx_spi_initfiq()
363 	hw->fiq_handler.fiq_op = s3c24xx_spi_fiqop;  in s3c24xx_spi_initfiq()
368  * @hw: The hardware state.
373 static inline bool s3c24xx_spi_usefiq(struct s3c24xx_spi *hw)  in s3c24xx_spi_usefiq()  argument
375 	return hw->pdata->use_fiq;  in s3c24xx_spi_usefiq()
400 	struct s3c24xx_spi *hw = to_hw(spi);  in s3c24xx_spi_txrx()  local
402 	hw->tx = t->tx_buf;  in s3c24xx_spi_txrx()
403 	hw->rx = t->rx_buf;  in s3c24xx_spi_txrx()
404 	hw->len = t->len;  in s3c24xx_spi_txrx()
405 	hw->count = 0;  in s3c24xx_spi_txrx()
407 	init_completion(&hw->done);  in s3c24xx_spi_txrx()
409 	hw->fiq_inuse = 0;  in s3c24xx_spi_txrx()
410 	if (s3c24xx_spi_usefiq(hw) && t->len >= 3)  in s3c24xx_spi_txrx()
411 		s3c24xx_spi_tryfiq(hw);  in s3c24xx_spi_txrx()
414 	writeb(hw_txbyte(hw, 0), hw->regs + S3C2410_SPTDAT);  in s3c24xx_spi_txrx()
416 	wait_for_completion(&hw->done);  in s3c24xx_spi_txrx()
417 	return hw->count;  in s3c24xx_spi_txrx()
422 	struct s3c24xx_spi *hw = dev;  in s3c24xx_spi_irq()  local
423 	unsigned int spsta = readb(hw->regs + S3C2410_SPSTA);  in s3c24xx_spi_irq()
424 	unsigned int count = hw->count;  in s3c24xx_spi_irq()
427 		dev_dbg(hw->dev, "data-collision\n");  in s3c24xx_spi_irq()
428 		complete(&hw->done);  in s3c24xx_spi_irq()
433 		dev_dbg(hw->dev, "spi not ready for tx?\n");  in s3c24xx_spi_irq()
434 		complete(&hw->done);  in s3c24xx_spi_irq()
438 	if (!s3c24xx_spi_usingfiq(hw)) {  in s3c24xx_spi_irq()
439 		hw->count++;  in s3c24xx_spi_irq()
441 		if (hw->rx)  in s3c24xx_spi_irq()
442 			hw->rx[count] = readb(hw->regs + S3C2410_SPRDAT);  in s3c24xx_spi_irq()
446 		if (count < hw->len)  in s3c24xx_spi_irq()
447 			writeb(hw_txbyte(hw, count), hw->regs + S3C2410_SPTDAT);  in s3c24xx_spi_irq()
449 			complete(&hw->done);  in s3c24xx_spi_irq()
451 		hw->count = hw->len;  in s3c24xx_spi_irq()
452 		hw->fiq_inuse = 0;  in s3c24xx_spi_irq()
454 		if (hw->rx)  in s3c24xx_spi_irq()
455 			hw->rx[hw->len-1] = readb(hw->regs + S3C2410_SPRDAT);  in s3c24xx_spi_irq()
457 		complete(&hw->done);  in s3c24xx_spi_irq()
464 static void s3c24xx_spi_initialsetup(struct s3c24xx_spi *hw)  in s3c24xx_spi_initialsetup()  argument
468 	clk_enable(hw->clk);  in s3c24xx_spi_initialsetup()
472 	writeb(0xff, hw->regs + S3C2410_SPPRE);  in s3c24xx_spi_initialsetup()
473 	writeb(SPPIN_DEFAULT, hw->regs + S3C2410_SPPIN);  in s3c24xx_spi_initialsetup()
474 	writeb(SPCON_DEFAULT, hw->regs + S3C2410_SPCON);  in s3c24xx_spi_initialsetup()
476 	if (hw->pdata) {  in s3c24xx_spi_initialsetup()
477 		if (hw->set_cs == s3c24xx_spi_gpiocs)  in s3c24xx_spi_initialsetup()
478 			gpio_direction_output(hw->pdata->pin_cs, 1);  in s3c24xx_spi_initialsetup()
480 		if (hw->pdata->gpio_setup)  in s3c24xx_spi_initialsetup()
481 			hw->pdata->gpio_setup(hw->pdata, 1);  in s3c24xx_spi_initialsetup()
488 	struct s3c24xx_spi *hw;  in s3c24xx_spi_probe()  local
498 	hw = spi_master_get_devdata(master);  in s3c24xx_spi_probe()
500 	hw->master = master;  in s3c24xx_spi_probe()
501 	hw->pdata = pdata = dev_get_platdata(&pdev->dev);  in s3c24xx_spi_probe()
502 	hw->dev = &pdev->dev;  in s3c24xx_spi_probe()
510 	platform_set_drvdata(pdev, hw);  in s3c24xx_spi_probe()
511 	init_completion(&hw->done);  in s3c24xx_spi_probe()
515 	s3c24xx_spi_initfiq(hw);  in s3c24xx_spi_probe()
522 	master->num_chipselect = hw->pdata->num_cs;  in s3c24xx_spi_probe()
528 	hw->bitbang.master         = hw->master;  in s3c24xx_spi_probe()
529 	hw->bitbang.setup_transfer = s3c24xx_spi_setupxfer;  in s3c24xx_spi_probe()
530 	hw->bitbang.chipselect     = s3c24xx_spi_chipsel;  in s3c24xx_spi_probe()
531 	hw->bitbang.txrx_bufs      = s3c24xx_spi_txrx;  in s3c24xx_spi_probe()
533 	hw->master->setup  = s3c24xx_spi_setup;  in s3c24xx_spi_probe()
535 	dev_dbg(hw->dev, "bitbang at %p\n", &hw->bitbang);  in s3c24xx_spi_probe()
538 	hw->regs = devm_platform_ioremap_resource(pdev, 0);  in s3c24xx_spi_probe()
539 	if (IS_ERR(hw->regs)) {  in s3c24xx_spi_probe()
540 		err = PTR_ERR(hw->regs);  in s3c24xx_spi_probe()
544 	hw->irq = platform_get_irq(pdev, 0);  in s3c24xx_spi_probe()
545 	if (hw->irq < 0) {  in s3c24xx_spi_probe()
550 	err = devm_request_irq(&pdev->dev, hw->irq, s3c24xx_spi_irq, 0,  in s3c24xx_spi_probe()
551 				pdev->name, hw);  in s3c24xx_spi_probe()
557 	hw->clk = devm_clk_get(&pdev->dev, "spi");  in s3c24xx_spi_probe()
558 	if (IS_ERR(hw->clk)) {  in s3c24xx_spi_probe()
560 		err = PTR_ERR(hw->clk);  in s3c24xx_spi_probe()
580 		hw->set_cs = s3c24xx_spi_gpiocs;  in s3c24xx_spi_probe()
583 		hw->set_cs = pdata->set_cs;  in s3c24xx_spi_probe()
585 	s3c24xx_spi_initialsetup(hw);  in s3c24xx_spi_probe()
589 	err = spi_bitbang_start(&hw->bitbang);  in s3c24xx_spi_probe()
598 	clk_disable(hw->clk);  in s3c24xx_spi_probe()
601 	spi_master_put(hw->master);  in s3c24xx_spi_probe()
607 	struct s3c24xx_spi *hw = platform_get_drvdata(dev);  in s3c24xx_spi_remove()  local
609 	spi_bitbang_stop(&hw->bitbang);  in s3c24xx_spi_remove()
610 	clk_disable(hw->clk);  in s3c24xx_spi_remove()
611 	spi_master_put(hw->master);  in s3c24xx_spi_remove()
620 	struct s3c24xx_spi *hw = dev_get_drvdata(dev);  in s3c24xx_spi_suspend()  local
623 	ret = spi_master_suspend(hw->master);  in s3c24xx_spi_suspend()
627 	if (hw->pdata && hw->pdata->gpio_setup)  in s3c24xx_spi_suspend()
628 		hw->pdata->gpio_setup(hw->pdata, 0);  in s3c24xx_spi_suspend()
630 	clk_disable(hw->clk);  in s3c24xx_spi_suspend()
636 	struct s3c24xx_spi *hw = dev_get_drvdata(dev);  in s3c24xx_spi_resume()  local
638 	s3c24xx_spi_initialsetup(hw);  in s3c24xx_spi_resume()
639 	return spi_master_resume(hw->master);  in s3c24xx_spi_resume()