44 static void clear_fifo(struct sh_spi *ss)  in clear_fifo()  argument
46 	sh_spi_set_bit(SH_SPI_RSTF, &ss->regs->cr2);  in clear_fifo()
47 	sh_spi_clear_bit(SH_SPI_RSTF, &ss->regs->cr2);  in clear_fifo()
50 static int recvbuf_wait(struct sh_spi *ss)  in recvbuf_wait()  argument
52 	while (sh_spi_read(&ss->regs->cr1) & SH_SPI_RBE) {  in recvbuf_wait()
60 static int write_fifo_empty_wait(struct sh_spi *ss)  in write_fifo_empty_wait()  argument
62 	while (!(sh_spi_read(&ss->regs->cr1) & SH_SPI_TBE)) {  in write_fifo_empty_wait()
74 static void sh_spi_set_cs(struct sh_spi *ss, unsigned int cs)  in sh_spi_set_cs()  argument
83 	sh_spi_clear_bit(SH_SPI_SSS0 | SH_SPI_SSS1, &ss->regs->cr4);  in sh_spi_set_cs()
84 	sh_spi_set_bit(val, &ss->regs->cr4);  in sh_spi_set_cs()
90 	struct sh_spi *ss;  in spi_setup_slave()  local
95 	ss = spi_alloc_slave(struct sh_spi, bus, cs);  in spi_setup_slave()
96 	if (!ss)  in spi_setup_slave()
99 	ss->regs = (struct sh_spi_regs *)CONFIG_SH_SPI_BASE;  in spi_setup_slave()
102 	sh_spi_write(0xfe, &ss->regs->cr1);  in spi_setup_slave()
104 	sh_spi_write(0x00, &ss->regs->cr1);  in spi_setup_slave()
106 	sh_spi_write(0x00, &ss->regs->cr3);  in spi_setup_slave()
107 	sh_spi_set_cs(ss, cs);  in spi_setup_slave()
109 	clear_fifo(ss);  in spi_setup_slave()
112 	sh_spi_write(sh_spi_read(&ss->regs->cr2) | 0x07, &ss->regs->cr2);  in spi_setup_slave()
115 	return &ss->slave;  in spi_setup_slave()
132 	struct sh_spi *ss = to_sh_spi(slave);  in spi_release_bus()  local
134 	sh_spi_write(sh_spi_read(&ss->regs->cr1) &  in spi_release_bus()
135 		~(SH_SPI_SSA | SH_SPI_SSDB | SH_SPI_SSD), &ss->regs->cr1);  in spi_release_bus()
138 static int sh_spi_send(struct sh_spi *ss, const unsigned char *tx_data,  in sh_spi_send()  argument
145 		sh_spi_set_bit(SH_SPI_SSA, &ss->regs->cr1);  in sh_spi_send()
151 			!(sh_spi_read(&ss->regs->cr4) & SH_SPI_WPABRT) &&  in sh_spi_send()
152 			!(sh_spi_read(&ss->regs->cr1) & SH_SPI_TBF);  in sh_spi_send()
154 			sh_spi_write(tx_data[i], &ss->regs->tbr_rbr);  in sh_spi_send()
158 		if (sh_spi_read(&ss->regs->cr4) & SH_SPI_WPABRT) {  in sh_spi_send()
161 			sh_spi_set_bit(SH_SPI_WPABRT, &ss->regs->cr4);  in sh_spi_send()
170 			write_fifo_empty_wait(ss);  in sh_spi_send()
174 		sh_spi_clear_bit(SH_SPI_SSD | SH_SPI_SSDB, &ss->regs->cr1);  in sh_spi_send()
175 		sh_spi_set_bit(SH_SPI_SSA, &ss->regs->cr1);  in sh_spi_send()
177 		write_fifo_empty_wait(ss);  in sh_spi_send()
183 static int sh_spi_receive(struct sh_spi *ss, unsigned char *rx_data,  in sh_spi_receive()  argument
189 		sh_spi_write(SH_SPI_MAX_BYTE, &ss->regs->cr3);  in sh_spi_receive()
191 		sh_spi_write(len, &ss->regs->cr3);  in sh_spi_receive()
193 	sh_spi_clear_bit(SH_SPI_SSD | SH_SPI_SSDB, &ss->regs->cr1);  in sh_spi_receive()
194 	sh_spi_set_bit(SH_SPI_SSA, &ss->regs->cr1);  in sh_spi_receive()
197 		if (recvbuf_wait(ss))  in sh_spi_receive()
200 		rx_data[i] = (unsigned char)sh_spi_read(&ss->regs->tbr_rbr);  in sh_spi_receive()
202 	sh_spi_write(0, &ss->regs->cr3);  in sh_spi_receive()
210 	struct sh_spi *ss = to_sh_spi(slave);  in spi_xfer()  local
217 		sh_spi_write(sh_spi_read(&ss->regs->cr1) & ~SH_SPI_SSA,  in spi_xfer()
218 				&ss->regs->cr1);  in spi_xfer()
221 		ret = sh_spi_send(ss, tx_data, len, flags);  in spi_xfer()
224 		ret = sh_spi_receive(ss, rx_data, len, flags);  in spi_xfer()
227 		sh_spi_set_bit(SH_SPI_SSD, &ss->regs->cr1);  in spi_xfer()
231 				 &ss->regs->cr1);  in spi_xfer()
232 		clear_fifo(ss);  in spi_xfer()