45 static inline u8 amd_spi_readreg8(struct spi_master *master, int idx)  in amd_spi_readreg8()  argument
47 	struct amd_spi *amd_spi = spi_master_get_devdata(master);  in amd_spi_readreg8()
52 static inline void amd_spi_writereg8(struct spi_master *master, int idx,  in amd_spi_writereg8()  argument
55 	struct amd_spi *amd_spi = spi_master_get_devdata(master);  in amd_spi_writereg8()
60 static inline void amd_spi_setclear_reg8(struct spi_master *master, int idx,  in amd_spi_setclear_reg8()  argument
63 	u8 tmp = amd_spi_readreg8(master, idx);  in amd_spi_setclear_reg8()
66 	amd_spi_writereg8(master, idx, tmp);  in amd_spi_setclear_reg8()
69 static inline u32 amd_spi_readreg32(struct spi_master *master, int idx)  in amd_spi_readreg32()  argument
71 	struct amd_spi *amd_spi = spi_master_get_devdata(master);  in amd_spi_readreg32()
76 static inline void amd_spi_writereg32(struct spi_master *master, int idx,  in amd_spi_writereg32()  argument
79 	struct amd_spi *amd_spi = spi_master_get_devdata(master);  in amd_spi_writereg32()
84 static inline void amd_spi_setclear_reg32(struct spi_master *master, int idx,  in amd_spi_setclear_reg32()  argument
87 	u32 tmp = amd_spi_readreg32(master, idx);  in amd_spi_setclear_reg32()
90 	amd_spi_writereg32(master, idx, tmp);  in amd_spi_setclear_reg32()
93 static void amd_spi_select_chip(struct spi_master *master)  in amd_spi_select_chip()  argument
95 	struct amd_spi *amd_spi = spi_master_get_devdata(master);  in amd_spi_select_chip()
98 	amd_spi_setclear_reg8(master, AMD_SPI_ALT_CS_REG, chip_select,  in amd_spi_select_chip()
102 static void amd_spi_clear_fifo_ptr(struct spi_master *master)  in amd_spi_clear_fifo_ptr()  argument
104 	amd_spi_setclear_reg32(master, AMD_SPI_CTRL0_REG, AMD_SPI_FIFO_CLEAR,  in amd_spi_clear_fifo_ptr()
108 static void amd_spi_set_opcode(struct spi_master *master, u8 cmd_opcode)  in amd_spi_set_opcode()  argument
110 	amd_spi_setclear_reg32(master, AMD_SPI_CTRL0_REG, cmd_opcode,  in amd_spi_set_opcode()
114 static inline void amd_spi_set_rx_count(struct spi_master *master,  in amd_spi_set_rx_count()  argument
117 	amd_spi_setclear_reg8(master, AMD_SPI_RX_COUNT_REG, rx_count, 0xff);  in amd_spi_set_rx_count()
120 static inline void amd_spi_set_tx_count(struct spi_master *master,  in amd_spi_set_tx_count()  argument
123 	amd_spi_setclear_reg8(master, AMD_SPI_TX_COUNT_REG, tx_count, 0xff);  in amd_spi_set_tx_count()
146 static void amd_spi_execute_opcode(struct spi_master *master)  in amd_spi_execute_opcode()  argument
148 	struct amd_spi *amd_spi = spi_master_get_devdata(master);  in amd_spi_execute_opcode()
151 	amd_spi_setclear_reg32(master, AMD_SPI_CTRL0_REG, AMD_SPI_EXEC_CMD,  in amd_spi_execute_opcode()
159 	struct spi_master *master = spi->master;  in amd_spi_master_setup()  local
161 	amd_spi_clear_fifo_ptr(master);  in amd_spi_master_setup()
167 				    struct spi_master *master,  in amd_spi_fifo_xfer()  argument
189 			amd_spi_set_opcode(master, cmd_opcode);  in amd_spi_fifo_xfer()
198 			amd_spi_set_tx_count(master, tx_len);  in amd_spi_fifo_xfer()
199 			amd_spi_clear_fifo_ptr(master);  in amd_spi_fifo_xfer()
201 			amd_spi_execute_opcode(master);  in amd_spi_fifo_xfer()
210 			amd_spi_set_rx_count(master, rx_len);  in amd_spi_fifo_xfer()
211 			amd_spi_clear_fifo_ptr(master);  in amd_spi_fifo_xfer()
213 			amd_spi_execute_opcode(master);  in amd_spi_fifo_xfer()
216 				buf[i] = amd_spi_readreg8(master,  in amd_spi_fifo_xfer()
226 	spi_finalize_current_message(master);  in amd_spi_fifo_xfer()
231 static int amd_spi_master_transfer(struct spi_master *master,  in amd_spi_master_transfer()  argument
234 	struct amd_spi *amd_spi = spi_master_get_devdata(master);  in amd_spi_master_transfer()
238 	amd_spi_select_chip(master);  in amd_spi_master_transfer()
244 	amd_spi_fifo_xfer(amd_spi, master, msg);  in amd_spi_master_transfer()
257 	struct spi_master *master;  in amd_spi_probe()  local
263 	master = spi_alloc_master(dev, sizeof(struct amd_spi));  in amd_spi_probe()
264 	if (!master) {  in amd_spi_probe()
265 		dev_err(dev, "Error allocating SPI master\n");  in amd_spi_probe()
269 	amd_spi = spi_master_get_devdata(master);  in amd_spi_probe()
281 	master->bus_num = 0;  in amd_spi_probe()
282 	master->num_chipselect = 4;  in amd_spi_probe()
283 	master->mode_bits = 0;  in amd_spi_probe()
284 	master->flags = SPI_MASTER_HALF_DUPLEX;  in amd_spi_probe()
285 	master->setup = amd_spi_master_setup;  in amd_spi_probe()
286 	master->transfer_one_message = amd_spi_master_transfer;  in amd_spi_probe()
287 	master->max_transfer_size = amd_spi_max_transfer_size;  in amd_spi_probe()
288 	master->max_message_size = amd_spi_max_transfer_size;  in amd_spi_probe()
291 	err = devm_spi_register_master(dev, master);  in amd_spi_probe()
300 	spi_master_put(master);  in amd_spi_probe()
325 MODULE_DESCRIPTION("AMD SPI Master Controller Driver");