86 #define ddata_to_dev(ddata)	(&(ddata->bitbang.master->dev))  argument
87 #define efm32_spi_vdbg(ddata, format, arg...)	\  argument
88 	dev_vdbg(ddata_to_dev(ddata), format, ##arg)
90 static void efm32_spi_write32(struct efm32_spi_ddata *ddata,  in efm32_spi_write32()  argument
93 	writel_relaxed(value, ddata->base + offset);  in efm32_spi_write32()
96 static u32 efm32_spi_read32(struct efm32_spi_ddata *ddata, unsigned offset)  in efm32_spi_read32()  argument
98 	return readl_relaxed(ddata->base + offset);  in efm32_spi_read32()
104 	struct efm32_spi_ddata *ddata = spi_master_get_devdata(spi->master);  in efm32_spi_setup_transfer()  local
108 	unsigned long clkfreq = clk_get_rate(ddata->clk);  in efm32_spi_setup_transfer()
111 	efm32_spi_write32(ddata, REG_CTRL_SYNC | REG_CTRL_MSBF |  in efm32_spi_setup_transfer()
115 	efm32_spi_write32(ddata,  in efm32_spi_setup_transfer()
126 	efm32_spi_write32(ddata, clkdiv, REG_CLKDIV);  in efm32_spi_setup_transfer()
127 	efm32_spi_write32(ddata, REG_CMD_MASTEREN, REG_CMD);  in efm32_spi_setup_transfer()
128 	efm32_spi_write32(ddata, REG_CMD_RXEN | REG_CMD_TXEN, REG_CMD);  in efm32_spi_setup_transfer()
133 static void efm32_spi_tx_u8(struct efm32_spi_ddata *ddata)  in efm32_spi_tx_u8()  argument
137 	if (ddata->tx_buf) {  in efm32_spi_tx_u8()
138 		val = *ddata->tx_buf;  in efm32_spi_tx_u8()
139 		ddata->tx_buf++;  in efm32_spi_tx_u8()
142 	ddata->tx_len--;  in efm32_spi_tx_u8()
143 	efm32_spi_write32(ddata, val, REG_TXDATA);  in efm32_spi_tx_u8()
144 	efm32_spi_vdbg(ddata, "%s: tx 0x%x\n", __func__, val);  in efm32_spi_tx_u8()
147 static void efm32_spi_rx_u8(struct efm32_spi_ddata *ddata)  in efm32_spi_rx_u8()  argument
149 	u32 rxdata = efm32_spi_read32(ddata, REG_RXDATAX);  in efm32_spi_rx_u8()
150 	efm32_spi_vdbg(ddata, "%s: rx 0x%x\n", __func__, rxdata);  in efm32_spi_rx_u8()
152 	if (ddata->rx_buf) {  in efm32_spi_rx_u8()
153 		*ddata->rx_buf = rxdata;  in efm32_spi_rx_u8()
154 		ddata->rx_buf++;  in efm32_spi_rx_u8()
157 	ddata->rx_len--;  in efm32_spi_rx_u8()
160 static void efm32_spi_filltx(struct efm32_spi_ddata *ddata)  in efm32_spi_filltx()  argument
162 	while (ddata->tx_len &&  in efm32_spi_filltx()
163 			ddata->tx_len + 2 > ddata->rx_len &&  in efm32_spi_filltx()
164 			efm32_spi_read32(ddata, REG_STATUS) & REG_STATUS_TXBL) {  in efm32_spi_filltx()
165 		efm32_spi_tx_u8(ddata);  in efm32_spi_filltx()
171 	struct efm32_spi_ddata *ddata = spi_master_get_devdata(spi->master);  in efm32_spi_txrx_bufs()  local
174 	spin_lock_irq(&ddata->lock);  in efm32_spi_txrx_bufs()
176 	if (ddata->tx_buf || ddata->rx_buf)  in efm32_spi_txrx_bufs()
179 	ddata->tx_buf = t->tx_buf;  in efm32_spi_txrx_bufs()
180 	ddata->rx_buf = t->rx_buf;  in efm32_spi_txrx_bufs()
181 	ddata->tx_len = ddata->rx_len =  in efm32_spi_txrx_bufs()
184 	efm32_spi_filltx(ddata);  in efm32_spi_txrx_bufs()
186 	reinit_completion(&ddata->done);  in efm32_spi_txrx_bufs()
188 	efm32_spi_write32(ddata, REG_IF_TXBL | REG_IF_RXDATAV, REG_IEN);  in efm32_spi_txrx_bufs()
190 	spin_unlock_irq(&ddata->lock);  in efm32_spi_txrx_bufs()
192 	wait_for_completion(&ddata->done);  in efm32_spi_txrx_bufs()
194 	spin_lock_irq(&ddata->lock);  in efm32_spi_txrx_bufs()
196 	ret = t->len - max(ddata->tx_len, ddata->rx_len);  in efm32_spi_txrx_bufs()
198 	efm32_spi_write32(ddata, 0, REG_IEN);  in efm32_spi_txrx_bufs()
199 	ddata->tx_buf = ddata->rx_buf = NULL;  in efm32_spi_txrx_bufs()
202 	spin_unlock_irq(&ddata->lock);  in efm32_spi_txrx_bufs()
209 	struct efm32_spi_ddata *ddata = data;  in efm32_spi_rxirq()  local
212 	spin_lock(&ddata->lock);  in efm32_spi_rxirq()
214 	while (ddata->rx_len > 0 &&  in efm32_spi_rxirq()
215 			efm32_spi_read32(ddata, REG_STATUS) &  in efm32_spi_rxirq()
217 		efm32_spi_rx_u8(ddata);  in efm32_spi_rxirq()
222 	if (!ddata->rx_len) {  in efm32_spi_rxirq()
223 		u32 ien = efm32_spi_read32(ddata, REG_IEN);  in efm32_spi_rxirq()
227 		efm32_spi_write32(ddata, ien, REG_IEN);  in efm32_spi_rxirq()
229 		complete(&ddata->done);  in efm32_spi_rxirq()
232 	spin_unlock(&ddata->lock);  in efm32_spi_rxirq()
239 	struct efm32_spi_ddata *ddata = data;  in efm32_spi_txirq()  local
241 	efm32_spi_vdbg(ddata,  in efm32_spi_txirq()
243 			__func__, ddata->tx_len, ddata->rx_len,  in efm32_spi_txirq()
244 			efm32_spi_read32(ddata, REG_IF),  in efm32_spi_txirq()
245 			efm32_spi_read32(ddata, REG_STATUS));  in efm32_spi_txirq()
247 	spin_lock(&ddata->lock);  in efm32_spi_txirq()
249 	efm32_spi_filltx(ddata);  in efm32_spi_txirq()
251 	efm32_spi_vdbg(ddata, "%s: txlen = %u, rxlen = %u\n",  in efm32_spi_txirq()
252 			__func__, ddata->tx_len, ddata->rx_len);  in efm32_spi_txirq()
254 	if (!ddata->tx_len) {  in efm32_spi_txirq()
255 		u32 ien = efm32_spi_read32(ddata, REG_IEN);  in efm32_spi_txirq()
259 		efm32_spi_write32(ddata, ien, REG_IEN);  in efm32_spi_txirq()
260 		efm32_spi_vdbg(ddata, "disable TXBL\n");  in efm32_spi_txirq()
263 	spin_unlock(&ddata->lock);  in efm32_spi_txirq()
268 static u32 efm32_spi_get_configured_location(struct efm32_spi_ddata *ddata)  in efm32_spi_get_configured_location()  argument
270 	u32 reg = efm32_spi_read32(ddata, REG_ROUTE);  in efm32_spi_get_configured_location()
276 		struct spi_master *master, struct efm32_spi_ddata *ddata)  in efm32_spi_probe_dt()  argument
296 		location = efm32_spi_get_configured_location(ddata);  in efm32_spi_probe_dt()
301 	ddata->pdata.location = location;  in efm32_spi_probe_dt()
306 	struct efm32_spi_ddata *ddata;  in efm32_spi_probe()  local
315 	master = spi_alloc_master(&pdev->dev, sizeof(*ddata));  in efm32_spi_probe()
329 	ddata = spi_master_get_devdata(master);  in efm32_spi_probe()
331 	ddata->bitbang.master = master;  in efm32_spi_probe()
332 	ddata->bitbang.setup_transfer = efm32_spi_setup_transfer;  in efm32_spi_probe()
333 	ddata->bitbang.txrx_bufs = efm32_spi_txrx_bufs;  in efm32_spi_probe()
335 	spin_lock_init(&ddata->lock);  in efm32_spi_probe()
336 	init_completion(&ddata->done);  in efm32_spi_probe()
338 	ddata->clk = devm_clk_get(&pdev->dev, NULL);  in efm32_spi_probe()
339 	if (IS_ERR(ddata->clk)) {  in efm32_spi_probe()
340 		ret = PTR_ERR(ddata->clk);  in efm32_spi_probe()
358 	ddata->base = devm_ioremap_resource(&pdev->dev, res);  in efm32_spi_probe()
359 	if (IS_ERR(ddata->base)) {  in efm32_spi_probe()
360 		ret = PTR_ERR(ddata->base);  in efm32_spi_probe()
368 	ddata->rxirq = ret;  in efm32_spi_probe()
372 		ret = ddata->rxirq + 1;  in efm32_spi_probe()
374 	ddata->txirq = ret;  in efm32_spi_probe()
376 	ret = clk_prepare_enable(ddata->clk);  in efm32_spi_probe()
382 	efm32_spi_probe_dt(pdev, master, ddata);  in efm32_spi_probe()
384 	efm32_spi_write32(ddata, 0, REG_IEN);  in efm32_spi_probe()
385 	efm32_spi_write32(ddata, REG_ROUTE_TXPEN | REG_ROUTE_RXPEN |  in efm32_spi_probe()
387 			REG_ROUTE_LOCATION(ddata->pdata.location), REG_ROUTE);  in efm32_spi_probe()
389 	ret = request_irq(ddata->rxirq, efm32_spi_rxirq,  in efm32_spi_probe()
390 			0, DRIVER_NAME " rx", ddata);  in efm32_spi_probe()
396 	ret = request_irq(ddata->txirq, efm32_spi_txirq,  in efm32_spi_probe()
397 			0, DRIVER_NAME " tx", ddata);  in efm32_spi_probe()
403 	ret = spi_bitbang_start(&ddata->bitbang);  in efm32_spi_probe()
407 		free_irq(ddata->txirq, ddata);  in efm32_spi_probe()
409 		free_irq(ddata->rxirq, ddata);  in efm32_spi_probe()
411 		clk_disable_unprepare(ddata->clk);  in efm32_spi_probe()
422 	struct efm32_spi_ddata *ddata = spi_master_get_devdata(master);  in efm32_spi_remove()  local
424 	spi_bitbang_stop(&ddata->bitbang);  in efm32_spi_remove()
426 	efm32_spi_write32(ddata, 0, REG_IEN);  in efm32_spi_remove()
428 	free_irq(ddata->txirq, ddata);  in efm32_spi_remove()
429 	free_irq(ddata->rxirq, ddata);  in efm32_spi_remove()
430 	clk_disable_unprepare(ddata->clk);  in efm32_spi_remove()