greybus: sdio: extend sdio implementation

Extend sdio implementation, as it for now it was basically stubs.

This implementation is compile tested only since there is no fw or
simulation support yet.
Next step is to add sdio support to gbsim and test it with success
using the mmc_test facility.
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/greybus_protocols.h

@@ -616,5 +616,165 @@ struct gb_uart_serial_state_request {
 	__le16	control;
 };
 
+/* SDIO */
+/* Version of the Greybus sdio protocol we support */
+#define GB_SDIO_VERSION_MAJOR		0x00
+#define GB_SDIO_VERSION_MINOR		0x01
+
+/* Version of the Greybus SDIO protocol we support */
+#define GB_SDIO_VERSION_MAJOR		0x00
+#define GB_SDIO_VERSION_MINOR		0x01
+
+/* Greybus SDIO operation types */
+#define GB_SDIO_TYPE_INVALID			0x00
+#define GB_SDIO_TYPE_PROTOCOL_VERSION		0x01
+#define GB_SDIO_TYPE_GET_CAPABILITIES		0x02
+#define GB_SDIO_TYPE_SET_IOS			0x03
+#define GB_SDIO_TYPE_COMMAND			0x04
+#define GB_SDIO_TYPE_TRANSFER			0x05
+#define GB_SDIO_TYPE_EVENT			0x06
+
+/* get caps response: request has no payload */
+struct gb_sdio_get_caps_response {
+	__le32	caps;
+#define GB_SDIO_CAP_NONREMOVABLE	0x00000001
+#define GB_SDIO_CAP_4_BIT_DATA		0x00000002
+#define GB_SDIO_CAP_8_BIT_DATA		0x00000004
+#define GB_SDIO_CAP_MMC_HS		0x00000008
+#define GB_SDIO_CAP_SD_HS		0x00000010
+#define GB_SDIO_CAP_ERASE		0x00000020
+#define GB_SDIO_CAP_1_2V_DDR		0x00000040
+#define GB_SDIO_CAP_1_8V_DDR		0x00000080
+#define GB_SDIO_CAP_POWER_OFF_CARD	0x00000100
+#define GB_SDIO_CAP_UHS_SDR12		0x00000200
+#define GB_SDIO_CAP_UHS_SDR25		0x00000400
+#define GB_SDIO_CAP_UHS_SDR50		0x00000800
+#define GB_SDIO_CAP_UHS_SDR104		0x00001000
+#define GB_SDIO_CAP_UHS_DDR50		0x00002000
+#define GB_SDIO_CAP_DRIVER_TYPE_A	0x00004000
+#define GB_SDIO_CAP_DRIVER_TYPE_C	0x00008000
+#define GB_SDIO_CAP_DRIVER_TYPE_D	0x00010000
+#define GB_SDIO_CAP_HS200_1_2V		0x00020000
+#define GB_SDIO_CAP_HS200_1_8V		0x00040000
+#define GB_SDIO_CAP_HS400_1_2V		0x00080000
+#define GB_SDIO_CAP_HS400_1_8V		0x00100000
+
+	/* see possible values below at vdd */
+	__le32 ocr;
+	__le16 max_blk_count;
+	__le16 max_blk_size;
+};
+
+/* set ios request: response has no payload */
+struct gb_sdio_set_ios_request {
+	__le32	clock;
+	__le32	vdd;
+#define GB_SDIO_VDD_165_195	0x00000001
+#define GB_SDIO_VDD_20_21	0x00000002
+#define GB_SDIO_VDD_21_22	0x00000004
+#define GB_SDIO_VDD_22_23	0x00000008
+#define GB_SDIO_VDD_23_24	0x00000010
+#define GB_SDIO_VDD_24_25	0x00000020
+#define GB_SDIO_VDD_25_26	0x00000040
+#define GB_SDIO_VDD_26_27	0x00000080
+#define GB_SDIO_VDD_27_28	0x00000100
+#define GB_SDIO_VDD_28_29	0x00000200
+#define GB_SDIO_VDD_29_30	0x00000400
+#define GB_SDIO_VDD_30_31	0x00000800
+#define GB_SDIO_VDD_31_32	0x00001000
+#define GB_SDIO_VDD_32_33	0x00002000
+#define GB_SDIO_VDD_33_34	0x00004000
+#define GB_SDIO_VDD_34_35	0x00008000
+#define GB_SDIO_VDD_35_36	0x00010000
+
+	__u8	bus_mode;
+#define GB_SDIO_BUSMODE_OPENDRAIN	0x00
+#define GB_SDIO_BUSMODE_PUSHPULL	0x01
+
+	__u8	power_mode;
+#define GB_SDIO_POWER_OFF	0x00
+#define GB_SDIO_POWER_UP	0x01
+#define GB_SDIO_POWER_ON	0x02
+#define GB_SDIO_POWER_UNDEFINED	0x03
+
+	__u8	bus_width;
+#define GB_SDIO_BUS_WIDTH_1	0x00
+#define GB_SDIO_BUS_WIDTH_4	0x02
+#define GB_SDIO_BUS_WIDTH_8	0x03
+
+	__u8	timing;
+#define GB_SDIO_TIMING_LEGACY		0x00
+#define GB_SDIO_TIMING_MMC_HS		0x01
+#define GB_SDIO_TIMING_SD_HS		0x02
+#define GB_SDIO_TIMING_UHS_SDR12	0x03
+#define GB_SDIO_TIMING_UHS_SDR25	0x04
+#define GB_SDIO_TIMING_UHS_SDR50	0x05
+#define GB_SDIO_TIMING_UHS_SDR104	0x06
+#define GB_SDIO_TIMING_UHS_DDR50	0x07
+#define GB_SDIO_TIMING_MMC_DDR52	0x08
+#define GB_SDIO_TIMING_MMC_HS200	0x09
+#define GB_SDIO_TIMING_MMC_HS400	0x0A
+
+	__u8	signal_voltage;
+#define GB_SDIO_SIGNAL_VOLTAGE_330	0x00
+#define GB_SDIO_SIGNAL_VOLTAGE_180	0x01
+#define GB_SDIO_SIGNAL_VOLTAGE_120	0x02
+
+	__u8	drv_type;
+#define GB_SDIO_SET_DRIVER_TYPE_B	0x00
+#define GB_SDIO_SET_DRIVER_TYPE_A	0x01
+#define GB_SDIO_SET_DRIVER_TYPE_C	0x02
+#define GB_SDIO_SET_DRIVER_TYPE_D	0x03
+};
+
+/* command request */
+struct gb_sdio_command_request {
+	__u8	cmd;
+	__u8	cmd_flags;
+#define GB_SDIO_RSP_NONE		0x00
+#define GB_SDIO_RSP_R1_R5_R6_R7		0x01
+#define GB_SDIO_RSP_R1B			0x02
+#define GB_SDIO_RSP_R2			0x03
+#define GB_SDIO_RSP_R3_R4		0x04
+
+	__u8	cmd_type;
+#define GB_SDIO_CMD_AC		0x00
+#define GB_SDIO_CMD_ADTC	0x01
+#define GB_SDIO_CMD_BCR		0x02
+#define GB_SDIO_CMD_BC		0x03
+
+	__le32	cmd_arg;
+};
+
+struct gb_sdio_command_response {
+	__le32	resp[4];
+};
+
+/* transfer request */
+struct gb_sdio_transfer_request {
+	__u8	data_flags;
+#define GB_SDIO_DATA_WRITE	0x01
+#define GB_SDIO_DATA_READ	0x02
+#define GB_SDIO_DATA_STREAM	0x04
+
+	__le16	data_blocks;
+	__le16	data_blksz;
+	__u8	data[0];
+};
+
+struct gb_sdio_transfer_response {
+	__le16	data_blocks;
+	__le16	data_blksz;
+	__u8	data[0];
+};
+
+/* event request: generated by module and is defined as unidirectional */
+struct gb_sdio_event_request {
+	__u8	event;
+#define GB_SDIO_CARD_INSERTED	0x01
+#define GB_SDIO_CARD_REMOVED	0x02
+#define GB_SDIO_WP		0x04
+};
+
 #endif /* __GREYBUS_PROTOCOLS_H */