35  * For CMD_SINGLE_READ and CMD_INTERNAL_READ, WILC may insert one or
57 static int wilc_spi_reset(struct wilc *wilc);
58 static int wilc_spi_configure_bus_protocol(struct wilc *wilc);
59 static int wilc_validate_chipid(struct wilc *wilc);
163 static int wilc_parse_gpios(struct wilc *wilc)  in wilc_parse_gpios()  argument
165 	struct spi_device *spi = to_spi_device(wilc->dev);  in wilc_parse_gpios()
166 	struct wilc_spi *spi_priv = wilc->bus_data;  in wilc_parse_gpios()
188 static void wilc_wlan_power(struct wilc *wilc, bool on)  in wilc_wlan_power()  argument
190 	struct wilc_spi *spi_priv = wilc->bus_data;  in wilc_wlan_power()
211 	struct wilc *wilc;  in wilc_bus_probe()  local
218 	ret = wilc_cfg80211_init(&wilc, &spi->dev, WILC_HIF_SPI, &wilc_hif_spi);  in wilc_bus_probe()
222 	spi_set_drvdata(spi, wilc);  in wilc_bus_probe()
223 	wilc->dev = &spi->dev;  in wilc_bus_probe()
224 	wilc->bus_data = spi_priv;  in wilc_bus_probe()
225 	wilc->dev_irq_num = spi->irq;  in wilc_bus_probe()
227 	ret = wilc_parse_gpios(wilc);  in wilc_bus_probe()
231 	wilc->rtc_clk = devm_clk_get_optional_enabled(&spi->dev, "rtc");  in wilc_bus_probe()
232 	if (IS_ERR(wilc->rtc_clk)) {  in wilc_bus_probe()
233 		ret = PTR_ERR(wilc->rtc_clk);  in wilc_bus_probe()
242 	wilc_wlan_power(wilc, true);  in wilc_bus_probe()
244 	ret = wilc_spi_configure_bus_protocol(wilc);  in wilc_bus_probe()
248 	ret = wilc_get_chipid(wilc);  in wilc_bus_probe()
252 	ret = wilc_cfg80211_register(wilc);  in wilc_bus_probe()
256 	ret = wilc_load_mac_from_nv(wilc);  in wilc_bus_probe()
262 	wilc_wlan_power(wilc, false);  in wilc_bus_probe()
263 	vif = wilc_netdev_ifc_init(wilc, "wlan%d", WILC_STATION_MODE,  in wilc_bus_probe()
272 	wiphy_unregister(wilc->wiphy);  in wilc_bus_probe()
274 	wilc_wlan_power(wilc, false);  in wilc_bus_probe()
276 	wilc_netdev_cleanup(wilc);  in wilc_bus_probe()
277 	wiphy_free(wilc->wiphy);  in wilc_bus_probe()
285 	struct wilc *wilc = spi_get_drvdata(spi);  in wilc_bus_remove()  local
286 	struct wilc_spi *spi_priv = wilc->bus_data;  in wilc_bus_remove()
288 	wilc_netdev_cleanup(wilc);  in wilc_bus_remove()
289 	wiphy_unregister(wilc->wiphy);  in wilc_bus_remove()
290 	wiphy_free(wilc->wiphy);  in wilc_bus_remove()
319 static int wilc_spi_tx(struct wilc *wilc, u8 *b, u32 len)  in wilc_spi_tx()  argument
321 	struct spi_device *spi = to_spi_device(wilc->dev);  in wilc_spi_tx()
361 static int wilc_spi_rx(struct wilc *wilc, u8 *rb, u32 rlen)  in wilc_spi_rx()  argument
363 	struct spi_device *spi = to_spi_device(wilc->dev);  in wilc_spi_rx()
402 static int wilc_spi_tx_rx(struct wilc *wilc, u8 *wb, u8 *rb, u32 rlen)  in wilc_spi_tx_rx()  argument
404 	struct spi_device *spi = to_spi_device(wilc->dev);  in wilc_spi_tx_rx()
437 static int spi_data_write(struct wilc *wilc, u8 *b, u32 sz)  in spi_data_write()  argument
439 	struct spi_device *spi = to_spi_device(wilc->dev);  in spi_data_write()
440 	struct wilc_spi *spi_priv = wilc->bus_data;  in spi_data_write()
468 		if (wilc_spi_tx(wilc, &cmd, 1)) {  in spi_data_write()
478 		if (wilc_spi_tx(wilc, &b[ix], nbytes)) {  in spi_data_write()
492 			if (wilc_spi_tx(wilc, crc, 2)) {  in spi_data_write()
519 static int wilc_spi_single_read(struct wilc *wilc, u8 cmd, u32 adr, void *b,  in wilc_spi_single_read()  argument
522 	struct spi_device *spi = to_spi_device(wilc->dev);  in wilc_spi_single_read()
523 	struct wilc_spi *spi_priv = wilc->bus_data;  in wilc_spi_single_read()
566 	if (wilc_spi_tx_rx(wilc, wb, rb, cmd_len + resp_len)) {  in wilc_spi_single_read()
614 static int wilc_spi_write_cmd(struct wilc *wilc, u8 cmd, u32 adr, u32 data,  in wilc_spi_write_cmd()  argument
617 	struct spi_device *spi = to_spi_device(wilc->dev);  in wilc_spi_write_cmd()
618 	struct wilc_spi *spi_priv = wilc->bus_data;  in wilc_spi_write_cmd()
663 	if (wilc_spi_tx_rx(wilc, wb, rb, cmd_len + resp_len)) {  in wilc_spi_write_cmd()
689 static int wilc_spi_dma_rw(struct wilc *wilc, u8 cmd, u32 adr, u8 *b, u32 sz)  in wilc_spi_dma_rw()  argument
691 	struct spi_device *spi = to_spi_device(wilc->dev);  in wilc_spi_dma_rw()
692 	struct wilc_spi *spi_priv = wilc->bus_data;  in wilc_spi_dma_rw()
740 	if (wilc_spi_tx_rx(wilc, wb, rb, cmd_len + resp_len)) {  in wilc_spi_dma_rw()
773 			if (wilc_spi_rx(wilc, &rsp, 1)) {  in wilc_spi_dma_rw()
785 		if (wilc_spi_rx(wilc, &b[ix], nbytes)) {  in wilc_spi_dma_rw()
795 			if (wilc_spi_rx(wilc, crc, 2)) {  in wilc_spi_dma_rw()
816 static int wilc_spi_special_cmd(struct wilc *wilc, u8 cmd)  in wilc_spi_special_cmd()  argument
818 	struct spi_device *spi = to_spi_device(wilc->dev);  in wilc_spi_special_cmd()
819 	struct wilc_spi *spi_priv = wilc->bus_data;  in wilc_spi_special_cmd()
849 	if (wilc_spi_tx_rx(wilc, wb, rb, cmd_len + resp_len)) {  in wilc_spi_special_cmd()
871 static void wilc_spi_reset_cmd_sequence(struct wilc *wl, u8 attempt, u32 addr)  in wilc_spi_reset_cmd_sequence()
884 static int wilc_spi_read_reg(struct wilc *wilc, u32 addr, u32 *data)  in wilc_spi_read_reg()  argument
886 	struct spi_device *spi = to_spi_device(wilc->dev);  in wilc_spi_read_reg()
899 		result = wilc_spi_single_read(wilc, cmd, addr, data, clockless);  in wilc_spi_read_reg()
910 		wilc_spi_reset_cmd_sequence(wilc, i, addr);  in wilc_spi_read_reg()
916 static int wilc_spi_read(struct wilc *wilc, u32 addr, u8 *buf, u32 size)  in wilc_spi_read()  argument
918 	struct spi_device *spi = to_spi_device(wilc->dev);  in wilc_spi_read()
926 		result = wilc_spi_dma_rw(wilc, CMD_DMA_EXT_READ, addr,  in wilc_spi_read()
933 		wilc_spi_reset_cmd_sequence(wilc, i, addr);  in wilc_spi_read()
939 static int spi_internal_write(struct wilc *wilc, u32 adr, u32 dat)  in spi_internal_write()  argument
941 	struct spi_device *spi = to_spi_device(wilc->dev);  in spi_internal_write()
946 		result = wilc_spi_write_cmd(wilc, CMD_INTERNAL_WRITE, adr,  in spi_internal_write()
952 		wilc_spi_reset_cmd_sequence(wilc, i, adr);  in spi_internal_write()
958 static int spi_internal_read(struct wilc *wilc, u32 adr, u32 *data)  in spi_internal_read()  argument
960 	struct spi_device *spi = to_spi_device(wilc->dev);  in spi_internal_read()
961 	struct wilc_spi *spi_priv = wilc->bus_data;  in spi_internal_read()
966 		result = wilc_spi_single_read(wilc, CMD_INTERNAL_READ, adr,  in spi_internal_read()
975 		wilc_spi_reset_cmd_sequence(wilc, i, adr);  in spi_internal_read()
987 static int wilc_spi_write_reg(struct wilc *wilc, u32 addr, u32 data)  in wilc_spi_write_reg()  argument
989 	struct spi_device *spi = to_spi_device(wilc->dev);  in wilc_spi_write_reg()
1002 		result = wilc_spi_write_cmd(wilc, cmd, addr, data, clockless);  in wilc_spi_write_reg()
1011 		wilc_spi_reset_cmd_sequence(wilc, i, addr);  in wilc_spi_write_reg()
1016 static int spi_data_rsp(struct wilc *wilc, u8 cmd)  in spi_data_rsp()  argument
1018 	struct spi_device *spi = to_spi_device(wilc->dev);  in spi_data_rsp()
1034 	result = wilc_spi_rx(wilc, rsp, sizeof(rsp));  in spi_data_rsp()
1062 static int wilc_spi_write(struct wilc *wilc, u32 addr, u8 *buf, u32 size)  in wilc_spi_write()  argument
1064 	struct spi_device *spi = to_spi_device(wilc->dev);  in wilc_spi_write()
1075 		result = wilc_spi_dma_rw(wilc, CMD_DMA_EXT_WRITE, addr,  in wilc_spi_write()
1080 			wilc_spi_reset_cmd_sequence(wilc, i, addr);  in wilc_spi_write()
1087 		result = spi_data_write(wilc, buf, size);  in wilc_spi_write()
1090 			wilc_spi_reset_cmd_sequence(wilc, i, addr);  in wilc_spi_write()
1097 		result = spi_data_rsp(wilc, CMD_DMA_EXT_WRITE);  in wilc_spi_write()
1100 			wilc_spi_reset_cmd_sequence(wilc, i, addr);  in wilc_spi_write()
1114 static int wilc_spi_reset(struct wilc *wilc)  in wilc_spi_reset()  argument
1116 	struct spi_device *spi = to_spi_device(wilc->dev);  in wilc_spi_reset()
1117 	struct wilc_spi *spi_priv = wilc->bus_data;  in wilc_spi_reset()
1120 	result = wilc_spi_special_cmd(wilc, CMD_RESET);  in wilc_spi_reset()
1127 static bool wilc_spi_is_init(struct wilc *wilc)  in wilc_spi_is_init()  argument
1129 	struct wilc_spi *spi_priv = wilc->bus_data;  in wilc_spi_is_init()
1134 static int wilc_spi_deinit(struct wilc *wilc)  in wilc_spi_deinit()  argument
1136 	struct wilc_spi *spi_priv = wilc->bus_data;  in wilc_spi_deinit()
1139 	wilc_wlan_power(wilc, false);  in wilc_spi_deinit()
1143 static int wilc_spi_init(struct wilc *wilc, bool resume)  in wilc_spi_init()  argument
1145 	struct wilc_spi *spi_priv = wilc->bus_data;  in wilc_spi_init()
1150 		if (wilc_validate_chipid(wilc) == 0)  in wilc_spi_init()
1154 	wilc_wlan_power(wilc, true);  in wilc_spi_init()
1156 	ret = wilc_spi_configure_bus_protocol(wilc);  in wilc_spi_init()
1158 		wilc_wlan_power(wilc, false);  in wilc_spi_init()
1167 static int wilc_spi_configure_bus_protocol(struct wilc *wilc)  in wilc_spi_configure_bus_protocol()  argument
1169 	struct spi_device *spi = to_spi_device(wilc->dev);  in wilc_spi_configure_bus_protocol()
1170 	struct wilc_spi *spi_priv = wilc->bus_data;  in wilc_spi_configure_bus_protocol()
1183 		ret = spi_internal_read(wilc, WILC_SPI_PROTOCOL_OFFSET, &reg);  in wilc_spi_configure_bus_protocol()
1208 	ret = spi_internal_write(wilc, WILC_SPI_PROTOCOL_OFFSET, reg);  in wilc_spi_configure_bus_protocol()
1211 			"[wilc spi %d]: Failed internal write reg\n",  in wilc_spi_configure_bus_protocol()
1220 	spi_internal_read(wilc, WILC_SPI_PROTOCOL_OFFSET, &reg);  in wilc_spi_configure_bus_protocol()
1227 static int wilc_validate_chipid(struct wilc *wilc)  in wilc_validate_chipid()  argument
1229 	struct spi_device *spi = to_spi_device(wilc->dev);  in wilc_validate_chipid()
1236 	ret = wilc_spi_read_reg(wilc, WILC_CHIPID, &chipid);  in wilc_validate_chipid()
1248 static int wilc_spi_read_size(struct wilc *wilc, u32 *size)  in wilc_spi_read_size()  argument
1252 	ret = spi_internal_read(wilc,  in wilc_spi_read_size()
1259 static int wilc_spi_read_int(struct wilc *wilc, u32 *int_status)  in wilc_spi_read_int()  argument
1261 	return spi_internal_read(wilc, WILC_SPI_INT_STATUS - WILC_SPI_REG_BASE,  in wilc_spi_read_int()
1265 static int wilc_spi_clear_int_ext(struct wilc *wilc, u32 val)  in wilc_spi_clear_int_ext()  argument
1272 		ret = spi_internal_write(wilc,  in wilc_spi_clear_int_ext()
1278 		ret = spi_internal_read(wilc,  in wilc_spi_clear_int_ext()
1289 static int wilc_spi_sync_ext(struct wilc *wilc, int nint)  in wilc_spi_sync_ext()  argument
1291 	struct spi_device *spi = to_spi_device(wilc->dev);  in wilc_spi_sync_ext()
1303 	ret = wilc_spi_read_reg(wilc, WILC_PIN_MUX_0, &reg);  in wilc_spi_sync_ext()
1310 	ret = wilc_spi_write_reg(wilc, WILC_PIN_MUX_0, reg);  in wilc_spi_sync_ext()
1320 	ret = wilc_spi_read_reg(wilc, WILC_INTR_ENABLE, &reg);  in wilc_spi_sync_ext()
1330 	ret = wilc_spi_write_reg(wilc, WILC_INTR_ENABLE, reg);  in wilc_spi_sync_ext()
1337 		ret = wilc_spi_read_reg(wilc, WILC_INTR2_ENABLE, &reg);  in wilc_spi_sync_ext()
1347 		ret = wilc_spi_write_reg(wilc, WILC_INTR2_ENABLE, reg);  in wilc_spi_sync_ext()