66 	struct altera_spi *hw = altera_spi_to_hw(spi);  in altera_spi_set_cs()  local
69 		hw->imr &= ~ALTERA_SPI_CONTROL_SSO_MSK;  in altera_spi_set_cs()
70 		writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);  in altera_spi_set_cs()
71 		writel(0, hw->base + ALTERA_SPI_SLAVE_SEL);  in altera_spi_set_cs()
73 		writel(BIT(spi->chip_select), hw->base + ALTERA_SPI_SLAVE_SEL);  in altera_spi_set_cs()
74 		hw->imr |= ALTERA_SPI_CONTROL_SSO_MSK;  in altera_spi_set_cs()
75 		writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);  in altera_spi_set_cs()
79 static void altera_spi_tx_word(struct altera_spi *hw)  in altera_spi_tx_word()  argument
83 	if (hw->tx) {  in altera_spi_tx_word()
84 		switch (hw->bytes_per_word) {  in altera_spi_tx_word()
86 			txd = hw->tx[hw->count];  in altera_spi_tx_word()
89 			txd = (hw->tx[hw->count * 2]  in altera_spi_tx_word()
90 				| (hw->tx[hw->count * 2 + 1] << 8));  in altera_spi_tx_word()
95 	writel(txd, hw->base + ALTERA_SPI_TXDATA);  in altera_spi_tx_word()
98 static void altera_spi_rx_word(struct altera_spi *hw)  in altera_spi_rx_word()  argument
102 	rxd = readl(hw->base + ALTERA_SPI_RXDATA);  in altera_spi_rx_word()
103 	if (hw->rx) {  in altera_spi_rx_word()
104 		switch (hw->bytes_per_word) {  in altera_spi_rx_word()
106 			hw->rx[hw->count] = rxd;  in altera_spi_rx_word()
109 			hw->rx[hw->count * 2] = rxd;  in altera_spi_rx_word()
110 			hw->rx[hw->count * 2 + 1] = rxd >> 8;  in altera_spi_rx_word()
115 	hw->count++;  in altera_spi_rx_word()
121 	struct altera_spi *hw = spi_master_get_devdata(master);  in altera_spi_txrx()  local
123 	hw->tx = t->tx_buf;  in altera_spi_txrx()
124 	hw->rx = t->rx_buf;  in altera_spi_txrx()
125 	hw->count = 0;  in altera_spi_txrx()
126 	hw->bytes_per_word = DIV_ROUND_UP(t->bits_per_word, 8);  in altera_spi_txrx()
127 	hw->len = t->len / hw->bytes_per_word;  in altera_spi_txrx()
129 	if (hw->irq >= 0) {  in altera_spi_txrx()
131 		hw->imr |= ALTERA_SPI_CONTROL_IRRDY_MSK;  in altera_spi_txrx()
132 		writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);  in altera_spi_txrx()
135 		altera_spi_tx_word(hw);  in altera_spi_txrx()
137 		while (hw->count < hw->len) {  in altera_spi_txrx()
138 			altera_spi_tx_word(hw);  in altera_spi_txrx()
140 			while (!(readl(hw->base + ALTERA_SPI_STATUS) &  in altera_spi_txrx()
144 			altera_spi_rx_word(hw);  in altera_spi_txrx()
155 	struct altera_spi *hw = spi_master_get_devdata(master);  in altera_spi_irq()  local
157 	altera_spi_rx_word(hw);  in altera_spi_irq()
159 	if (hw->count < hw->len) {  in altera_spi_irq()
160 		altera_spi_tx_word(hw);  in altera_spi_irq()
163 		hw->imr &= ~ALTERA_SPI_CONTROL_IRRDY_MSK;  in altera_spi_irq()
164 		writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);  in altera_spi_irq()
174 	struct altera_spi *hw;  in altera_spi_probe()  local
192 	hw = spi_master_get_devdata(master);  in altera_spi_probe()
196 	hw->base = devm_ioremap_resource(&pdev->dev, res);  in altera_spi_probe()
197 	if (IS_ERR(hw->base)) {  in altera_spi_probe()
198 		err = PTR_ERR(hw->base);  in altera_spi_probe()
202 	hw->imr = 0;		/* disable spi interrupts */  in altera_spi_probe()
203 	writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);  in altera_spi_probe()
204 	writel(0, hw->base + ALTERA_SPI_STATUS);	/* clear status reg */  in altera_spi_probe()
205 	if (readl(hw->base + ALTERA_SPI_STATUS) & ALTERA_SPI_STATUS_RRDY_MSK)  in altera_spi_probe()
206 		readl(hw->base + ALTERA_SPI_RXDATA);	/* flush rxdata */  in altera_spi_probe()
208 	hw->irq = platform_get_irq(pdev, 0);  in altera_spi_probe()
209 	if (hw->irq >= 0) {  in altera_spi_probe()
210 		err = devm_request_irq(&pdev->dev, hw->irq, altera_spi_irq, 0,  in altera_spi_probe()
219 	dev_info(&pdev->dev, "base %p, irq %d\n", hw->base, hw->irq);  in altera_spi_probe()