5  * Internal SPI driver for NetUP Universal Dual DVB-CI
13 #include <linux/spi/spi.h>
14 #include <linux/spi/flash.h>
69 irqreturn_t netup_spi_interrupt(struct netup_spi *spi)  in netup_spi_interrupt()  argument
74 	if (!spi)  in netup_spi_interrupt()
77 	spin_lock_irqsave(&spi->lock, flags);  in netup_spi_interrupt()
78 	reg = readw(&spi->regs->control_stat);  in netup_spi_interrupt()
80 		spin_unlock_irqrestore(&spi->lock, flags);  in netup_spi_interrupt()
81 		dev_dbg(&spi->master->dev,  in netup_spi_interrupt()
85 	writew(reg | NETUP_SPI_CTRL_IRQ, &spi->regs->control_stat);  in netup_spi_interrupt()
86 	reg = readw(&spi->regs->control_stat);  in netup_spi_interrupt()
87 	writew(reg & ~NETUP_SPI_CTRL_IMASK, &spi->regs->control_stat);  in netup_spi_interrupt()
88 	spi->state = SPI_STATE_DONE;  in netup_spi_interrupt()
89 	wake_up(&spi->waitq);  in netup_spi_interrupt()
90 	spin_unlock_irqrestore(&spi->lock, flags);  in netup_spi_interrupt()
91 	dev_dbg(&spi->master->dev,  in netup_spi_interrupt()
92 		"%s(): SPI interrupt handled\n", __func__);  in netup_spi_interrupt()
99 	struct netup_spi *spi = spi_master_get_devdata(master);  in netup_spi_transfer()  local
105 	writew(NETUP_SPI_CTRL_LAST_CS, &spi->regs->control_stat);  in netup_spi_transfer()
106 	writew(0, &spi->regs->control_stat);  in netup_spi_transfer()
111 			u32 frag_size = (tr_size > sizeof(spi->regs->data)) ?  in netup_spi_transfer()
112 					sizeof(spi->regs->data) : tr_size;  in netup_spi_transfer()
121 				memcpy_toio(spi->regs->data,  in netup_spi_transfer()
125 				memset_io(spi->regs->data,  in netup_spi_transfer()
128 			spi->state = SPI_STATE_START;  in netup_spi_transfer()
133 				&spi->regs->control_stat);  in netup_spi_transfer()
134 			dev_dbg(&spi->master->dev,  in netup_spi_transfer()
136 				__func__, readw(&spi->regs->control_stat));  in netup_spi_transfer()
137 			wait_event_timeout(spi->waitq,  in netup_spi_transfer()
138 				spi->state != SPI_STATE_START,  in netup_spi_transfer()
140 			if (spi->state == SPI_STATE_DONE) {  in netup_spi_transfer()
143 						spi->regs->data, frag_size);  in netup_spi_transfer()
146 				if (spi->state == SPI_STATE_START) {  in netup_spi_transfer()
147 					dev_dbg(&spi->master->dev,  in netup_spi_transfer()
151 					dev_dbg(&spi->master->dev,  in netup_spi_transfer()
153 						__func__, spi->state);  in netup_spi_transfer()
168 static int netup_spi_setup(struct spi_device *spi)  in netup_spi_setup()  argument
182 			"%s(): unable to alloc SPI master\n", __func__);  in netup_spi_init()
197 	ndev->spi = nspi;  in netup_spi_init()
199 		ndev->spi = NULL;  in netup_spi_init()
201 			"%s(): unable to register SPI bus\n", __func__);  in netup_spi_init()
212 		ndev->spi = NULL;  in netup_spi_init()
214 			"%s(): unable to create SPI device\n", __func__);  in netup_spi_init()
217 	dev_dbg(&ndev->pci_dev->dev, "%s(): SPI init OK\n", __func__);  in netup_spi_init()
225 	struct netup_spi *spi = ndev->spi;  in netup_spi_release()  local
227 	if (!spi)  in netup_spi_release()
230 	spi_unregister_master(spi->master);  in netup_spi_release()
231 	spin_lock_irqsave(&spi->lock, flags);  in netup_spi_release()
232 	reg = readw(&spi->regs->control_stat);  in netup_spi_release()
233 	writew(reg | NETUP_SPI_CTRL_IRQ, &spi->regs->control_stat);  in netup_spi_release()
234 	reg = readw(&spi->regs->control_stat);  in netup_spi_release()
235 	writew(reg & ~NETUP_SPI_CTRL_IMASK, &spi->regs->control_stat);  in netup_spi_release()
236 	spin_unlock_irqrestore(&spi->lock, flags);  in netup_spi_release()
237 	ndev->spi = NULL;  in netup_spi_release()