61 	struct tiny_spi *hw = tiny_spi_to_hw(spi);  in tiny_spi_baud()  local
63 	return min(DIV_ROUND_UP(hw->freq, hz * 2), (1U << hw->baudwidth)) - 1;  in tiny_spi_baud()
69 	struct tiny_spi *hw = tiny_spi_to_hw(spi);  in tiny_spi_setup_transfer()  local
70 	unsigned int baud = hw->baud;  in tiny_spi_setup_transfer()
73 		if (t->speed_hz && t->speed_hz != hw->speed_hz)  in tiny_spi_setup_transfer()
76 	writel(baud, hw->base + TINY_SPI_BAUD);  in tiny_spi_setup_transfer()
77 	writel(hw->mode, hw->base + TINY_SPI_CONTROL);  in tiny_spi_setup_transfer()
83 	struct tiny_spi *hw = tiny_spi_to_hw(spi);  in tiny_spi_setup()  local
85 	if (spi->max_speed_hz != hw->speed_hz) {  in tiny_spi_setup()
86 		hw->speed_hz = spi->max_speed_hz;  in tiny_spi_setup()
87 		hw->baud = tiny_spi_baud(spi, hw->speed_hz);  in tiny_spi_setup()
89 	hw->mode = spi->mode & SPI_MODE_X_MASK;  in tiny_spi_setup()
93 static inline void tiny_spi_wait_txr(struct tiny_spi *hw)  in tiny_spi_wait_txr()  argument
95 	while (!(readb(hw->base + TINY_SPI_STATUS) &  in tiny_spi_wait_txr()
100 static inline void tiny_spi_wait_txe(struct tiny_spi *hw)  in tiny_spi_wait_txe()  argument
102 	while (!(readb(hw->base + TINY_SPI_STATUS) &  in tiny_spi_wait_txe()
109 	struct tiny_spi *hw = tiny_spi_to_hw(spi);  in tiny_spi_txrx_bufs()  local
114 	if (hw->irq >= 0) {  in tiny_spi_txrx_bufs()
116 		hw->len = t->len;  in tiny_spi_txrx_bufs()
117 		hw->txp = t->tx_buf;  in tiny_spi_txrx_bufs()
118 		hw->rxp = t->rx_buf;  in tiny_spi_txrx_bufs()
119 		hw->txc = 0;  in tiny_spi_txrx_bufs()
120 		hw->rxc = 0;  in tiny_spi_txrx_bufs()
124 			writeb(hw->txp ? *hw->txp++ : 0,  in tiny_spi_txrx_bufs()
125 			       hw->base + TINY_SPI_TXDATA);  in tiny_spi_txrx_bufs()
126 			hw->txc++;  in tiny_spi_txrx_bufs()
127 			writeb(hw->txp ? *hw->txp++ : 0,  in tiny_spi_txrx_bufs()
128 			       hw->base + TINY_SPI_TXDATA);  in tiny_spi_txrx_bufs()
129 			hw->txc++;  in tiny_spi_txrx_bufs()
130 			writeb(TINY_SPI_STATUS_TXR, hw->base + TINY_SPI_STATUS);  in tiny_spi_txrx_bufs()
132 			writeb(hw->txp ? *hw->txp++ : 0,  in tiny_spi_txrx_bufs()
133 			       hw->base + TINY_SPI_TXDATA);  in tiny_spi_txrx_bufs()
134 			hw->txc++;  in tiny_spi_txrx_bufs()
135 			writeb(TINY_SPI_STATUS_TXE, hw->base + TINY_SPI_STATUS);  in tiny_spi_txrx_bufs()
138 		wait_for_completion(&hw->done);  in tiny_spi_txrx_bufs()
141 		writeb(txp ? *txp++ : 0, hw->base + TINY_SPI_TXDATA);  in tiny_spi_txrx_bufs()
143 			writeb(txp ? *txp++ : 0, hw->base + TINY_SPI_TXDATA);  in tiny_spi_txrx_bufs()
146 				tiny_spi_wait_txr(hw);  in tiny_spi_txrx_bufs()
148 				*rxp++ = readb(hw->base + TINY_SPI_TXDATA);  in tiny_spi_txrx_bufs()
150 		tiny_spi_wait_txe(hw);  in tiny_spi_txrx_bufs()
152 			*rxp++ = readb(hw->base + TINY_SPI_RXDATA);  in tiny_spi_txrx_bufs()
160 	struct tiny_spi *hw = dev;  in tiny_spi_irq()  local
162 	writeb(0, hw->base + TINY_SPI_STATUS);  in tiny_spi_irq()
163 	if (hw->rxc + 1 == hw->len) {  in tiny_spi_irq()
164 		if (hw->rxp)  in tiny_spi_irq()
165 			*hw->rxp++ = readb(hw->base + TINY_SPI_RXDATA);  in tiny_spi_irq()
166 		hw->rxc++;  in tiny_spi_irq()
167 		complete(&hw->done);  in tiny_spi_irq()
169 		if (hw->rxp)  in tiny_spi_irq()
170 			*hw->rxp++ = readb(hw->base + TINY_SPI_TXDATA);  in tiny_spi_irq()
171 		hw->rxc++;  in tiny_spi_irq()
172 		if (hw->txc < hw->len) {  in tiny_spi_irq()
173 			writeb(hw->txp ? *hw->txp++ : 0,  in tiny_spi_irq()
174 			       hw->base + TINY_SPI_TXDATA);  in tiny_spi_irq()
175 			hw->txc++;  in tiny_spi_irq()
177 			       hw->base + TINY_SPI_STATUS);  in tiny_spi_irq()
180 			       hw->base + TINY_SPI_STATUS);  in tiny_spi_irq()
191 	struct tiny_spi *hw = platform_get_drvdata(pdev);  in tiny_spi_of_probe()  local
197 	hw->bitbang.master->dev.of_node = pdev->dev.of_node;  in tiny_spi_of_probe()
199 		hw->freq = val;  in tiny_spi_of_probe()
201 		hw->baudwidth = val;  in tiny_spi_of_probe()
214 	struct tiny_spi *hw;  in tiny_spi_probe()  local
228 	hw = spi_master_get_devdata(master);  in tiny_spi_probe()
229 	platform_set_drvdata(pdev, hw);  in tiny_spi_probe()
232 	hw->bitbang.master = master;  in tiny_spi_probe()
233 	hw->bitbang.setup_transfer = tiny_spi_setup_transfer;  in tiny_spi_probe()
234 	hw->bitbang.txrx_bufs = tiny_spi_txrx_bufs;  in tiny_spi_probe()
237 	hw->base = devm_platform_ioremap_resource(pdev, 0);  in tiny_spi_probe()
238 	if (IS_ERR(hw->base)) {  in tiny_spi_probe()
239 		err = PTR_ERR(hw->base);  in tiny_spi_probe()
243 	hw->irq = platform_get_irq(pdev, 0);  in tiny_spi_probe()
244 	if (hw->irq >= 0) {  in tiny_spi_probe()
245 		init_completion(&hw->done);  in tiny_spi_probe()
246 		err = devm_request_irq(&pdev->dev, hw->irq, tiny_spi_irq, 0,  in tiny_spi_probe()
247 				       pdev->name, hw);  in tiny_spi_probe()
253 		hw->freq = platp->freq;  in tiny_spi_probe()
254 		hw->baudwidth = platp->baudwidth;  in tiny_spi_probe()
262 	err = spi_bitbang_start(&hw->bitbang);  in tiny_spi_probe()
265 	dev_info(&pdev->dev, "base %p, irq %d\n", hw->base, hw->irq);  in tiny_spi_probe()
276 	struct tiny_spi *hw = platform_get_drvdata(pdev);  in tiny_spi_remove()  local
277 	struct spi_master *master = hw->bitbang.master;  in tiny_spi_remove()
279 	spi_bitbang_stop(&hw->bitbang);  in tiny_spi_remove()