Cross Reference: /drivers/spi/spi-altera.c

Lines Matching refs:hw
72 	struct altera_spi *hw = altera_spi_to_hw(spi);
78 			       hw->base + ALTERA_SPI_SLAVE_SEL);
79 			hw->imr |= ALTERA_SPI_CONTROL_SSO_MSK;
80 			writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);
84 			hw->imr &= ~ALTERA_SPI_CONTROL_SSO_MSK;
85 			writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);
86 			writel(0, hw->base + ALTERA_SPI_SLAVE_SEL);
92 			hw->imr &= ~ALTERA_SPI_CONTROL_SSO_MSK;
93 			writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);
98 			       hw->base + ALTERA_SPI_SLAVE_SEL);
99 			hw->imr |= ALTERA_SPI_CONTROL_SSO_MSK;
100 			writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);
116 static inline unsigned int hw_txbyte(struct altera_spi *hw, int count)
118 	if (hw->tx) {
119 		switch (hw->bytes_per_word) {
121 			return hw->tx[count];
123 			return (hw->tx[count * 2]
124 				| (hw->tx[count * 2 + 1] << 8));
132 	struct altera_spi *hw = altera_spi_to_hw(spi);
134 	hw->tx = t->tx_buf;
135 	hw->rx = t->rx_buf;
136 	hw->count = 0;
137 	hw->bytes_per_word = (t->bits_per_word ? : spi->bits_per_word) / 8;
138 	hw->len = t->len / hw->bytes_per_word;
140 	if (hw->irq >= 0) {
142 		hw->imr |= ALTERA_SPI_CONTROL_IRRDY_MSK;
143 		writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);
146 		writel(hw_txbyte(hw, 0), hw->base + ALTERA_SPI_TXDATA);
148 		wait_for_completion(&hw->done);
150 		hw->imr &= ~ALTERA_SPI_CONTROL_IRRDY_MSK;
151 		writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);
154 		writel(hw_txbyte(hw, 0), hw->base + ALTERA_SPI_TXDATA);
159 			while (!(readl(hw->base + ALTERA_SPI_STATUS) &
163 			rxd = readl(hw->base + ALTERA_SPI_RXDATA);
164 			if (hw->rx) {
165 				switch (hw->bytes_per_word) {
167 					hw->rx[hw->count] = rxd;
170 					hw->rx[hw->count * 2] = rxd;
171 					hw->rx[hw->count * 2 + 1] = rxd >> 8;
176 			hw->count++;
178 			if (hw->count < hw->len)
179 				writel(hw_txbyte(hw, hw->count),
180 				       hw->base + ALTERA_SPI_TXDATA);
187 	return hw->count * hw->bytes_per_word;
192 	struct altera_spi *hw = dev;
195 	rxd = readl(hw->base + ALTERA_SPI_RXDATA);
196 	if (hw->rx) {
197 		switch (hw->bytes_per_word) {
199 			hw->rx[hw->count] = rxd;
202 			hw->rx[hw->count * 2] = rxd;
203 			hw->rx[hw->count * 2 + 1] = rxd >> 8;
208 	hw->count++;
210 	if (hw->count < hw->len)
211 		writel(hw_txbyte(hw, hw->count), hw->base + ALTERA_SPI_TXDATA);
213 		complete(&hw->done);
221 	struct altera_spi *hw;
236 	hw = spi_master_get_devdata(master);
237 	platform_set_drvdata(pdev, hw);
240 	hw->bitbang.master = spi_master_get(master);
241 	if (!hw->bitbang.master)
243 	hw->bitbang.setup_transfer = altera_spi_setupxfer;
244 	hw->bitbang.chipselect = altera_spi_chipsel;
245 	hw->bitbang.txrx_bufs = altera_spi_txrx;
254 	hw->base = devm_ioremap_nocache(&pdev->dev, res->start,
256 	if (!hw->base)
259 	hw->imr = 0;		/* disable spi interrupts */
260 	writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);
261 	writel(0, hw->base + ALTERA_SPI_STATUS);	/* clear status reg */
262 	if (readl(hw->base + ALTERA_SPI_STATUS) & ALTERA_SPI_STATUS_RRDY_MSK)
263 		readl(hw->base + ALTERA_SPI_RXDATA);	/* flush rxdata */
265 	hw->irq = platform_get_irq(pdev, 0);
266 	if (hw->irq >= 0) {
267 		init_completion(&hw->done);
268 		err = devm_request_irq(&pdev->dev, hw->irq, altera_spi_irq, 0,
269 				       pdev->name, hw);
275 		hw->bitbang.master->dev.of_node = pdev->dev.of_node;
278 	err = spi_bitbang_start(&hw->bitbang);
281 	dev_info(&pdev->dev, "base %p, irq %d\n", hw->base, hw->irq);
295 	struct altera_spi *hw = platform_get_drvdata(dev);
296 	struct spi_master *master = hw->bitbang.master;
298 	spi_bitbang_stop(&hw->bitbang);