+/* SPDX-License-Identifier: GPL-2.0+ */
/*
* (C) Copyright 2001
* Denis Peter, MPL AG Switzerland
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- *
*/
#ifndef _SCSI_H
#define _SCSI_H
-typedef struct SCSI_cmd_block{
- unsigned char cmd[16]; /* command */
- /* for request sense */
- unsigned char sense_buf[64]
+#include <asm/cache.h>
+#include <linux/dma-direction.h>
+
+/* Fix this to the maximum */
+#define SCSI_MAX_DEVICE \
+ (CONFIG_SYS_SCSI_MAX_SCSI_ID * CONFIG_SYS_SCSI_MAX_LUN)
+
+struct udevice;
+
+/**
+ * struct scsi_cmd - information about a SCSI command to be processed
+ *
+ * @cmd: command
+ * @sense_buf: for request sense
+ * @status: SCSI Status
+ * @target: Target ID
+ * @lun: Target LUN
+ * @cmdlen: command len
+ * @datalen: Total data length
+ * @pdata: pointer to data
+ * @msgout: Messge out buffer (NOT USED)
+ * @msgin: Message in buffer
+ * @sensecmdlen: Sense command len
+ * @sensedatalen: Sense data len
+ * @sensecmd: Sense command
+ * @contr_stat: Controller Status
+ * @trans_bytes: tranfered bytes
+ * @priv: Private value
+ * @dma_dir: Direction of data structure
+ */
+struct scsi_cmd {
+ unsigned char cmd[16];
+ unsigned char sense_buf[64]
__attribute__((aligned(ARCH_DMA_MINALIGN)));
- unsigned char status; /* SCSI Status */
- unsigned char target; /* Target ID */
- unsigned char lun; /* Target LUN */
- unsigned char cmdlen; /* command len */
- unsigned long datalen; /* Total data length */
- unsigned char * pdata; /* pointer to data */
- unsigned char msgout[12]; /* Messge out buffer (NOT USED) */
- unsigned char msgin[12]; /* Message in buffer */
- unsigned char sensecmdlen; /* Sense command len */
- unsigned long sensedatalen; /* Sense data len */
- unsigned char sensecmd[6]; /* Sense command */
- unsigned long contr_stat; /* Controller Status */
- unsigned long trans_bytes; /* tranfered bytes */
-
- unsigned int priv;
-}ccb;
+ unsigned char status;
+ unsigned char target;
+ unsigned char lun;
+ unsigned char cmdlen;
+ unsigned long datalen;
+ unsigned char *pdata;
+ unsigned char msgout[12];
+ unsigned char msgin[12];
+ unsigned char sensecmdlen;
+ unsigned long sensedatalen;
+ unsigned char sensecmd[6];
+ unsigned long contr_stat;
+ unsigned long trans_bytes;
+
+ unsigned int priv;
+ enum dma_data_direction dma_dir;
+};
/*-----------------------------------------------------------
**
#define SCSI_MED_REMOVL 0x1E /* Prevent/Allow medium Removal (O) */
#define SCSI_READ6 0x08 /* Read 6-byte (MANDATORY) */
#define SCSI_READ10 0x28 /* Read 10-byte (MANDATORY) */
+#define SCSI_READ16 0x48
#define SCSI_RD_CAPAC 0x25 /* Read Capacity (MANDATORY) */
#define SCSI_RD_CAPAC10 SCSI_RD_CAPAC /* Read Capacity (10) */
#define SCSI_RD_CAPAC16 0x9e /* Read Capacity (16) */
#define SCSI_WRITE_LONG 0x3F /* Write Long (O) */
#define SCSI_WRITE_SAME 0x41 /* Write Same (O) */
+/**
+ * enum scsi_cmd_phase - current phase of the SCSI protocol
+ *
+ * @SCSIPH_START: Start phase
+ * @SCSIPH_DATA: Data phase
+ * @SCSIPH_STATUS: Status phase
+ */
+enum scsi_cmd_phase {
+ SCSIPH_START,
+ SCSIPH_DATA,
+ SCSIPH_STATUS,
+};
-/****************************************************************************
- * decleration of functions which have to reside in the LowLevel Part Driver
+/**
+ * struct scsi_inquiry_resp - holds a SCSI inquiry command
+ *
+ * @type; command type
+ * @flags; command flags
+ * @version; command version
+ * @data_format; data format
+ * @additional_len; additional data length
+ * @spare[3]; spare bytes
+ * @vendor[8]; vendor information
+ * @product[16]; production information
+ * @revision[4]; revision information
*/
+struct scsi_inquiry_resp {
+ u8 type;
+ u8 flags;
+ u8 version;
+ u8 data_format;
+ u8 additional_len;
+ u8 spare[3];
+ char vendor[8];
+ char product[16];
+ char revision[4];
+};
-void scsi_print_error(ccb *pccb);
-int scsi_exec(ccb *pccb);
-void scsi_bus_reset(void);
-void scsi_low_level_init(int busdevfunc);
+/**
+ * struct scsi_read_capacity_resp - holds the response to a read-capacity cmd
+ *
+ * @last_block_addr: Logical block address of last block
+ * @block_len: Length of each block in bytes
+ */
+struct scsi_read_capacity_resp {
+ u32 last_block_addr;
+ u32 block_len;
+};
+/**
+ * struct scsi_read10_req - holds a SCSI READ10 request
+ *
+ * @cmd; command type
+ * @lun_flags; LUN flags
+ * @lba; Logical block address to start reading from
+ * @spare; spare bytes
+ * @xfer_len: number of blocks to read
+ * @spare2: more spare bytes
+ */
+struct __packed scsi_read10_req {
+ u8 cmd;
+ u8 lun_flags;
+ u32 lba;
+ u8 spare;
+ u16 xfer_len;
+ u8 spare2[3];
+};
-/***************************************************************************
- * functions residing inside cmd_scsi.c
+/** struct scsi_write10_req - data for the write10 command */
+struct __packed scsi_write10_req {
+ u8 cmd;
+ u8 lun_flags;
+ u32 lba;
+ u8 spare;
+ u16 xfer_len;
+ u8 spare2[3];
+};
+
+/**
+ * struct scsi_plat - stores information about SCSI controller
+ *
+ * @base: Controller base address
+ * @max_lun: Maximum number of logical units
+ * @max_id: Maximum number of target ids
+ * @max_bytes_per_req: Maximum number of bytes per read/write request
*/
-void scsi_init(void);
-void scsi_scan(int mode);
+struct scsi_plat {
+ unsigned long base;
+ unsigned long max_lun;
+ unsigned long max_id;
+ unsigned long max_bytes_per_req;
+};
+
+/* Operations for SCSI */
+struct scsi_ops {
+ /**
+ * exec() - execute a command
+ *
+ * @dev: SCSI bus
+ * @cmd: Command to execute
+ * @return 0 if OK, -ve on error
+ */
+ int (*exec)(struct udevice *dev, struct scsi_cmd *cmd);
+
+ /**
+ * bus_reset() - reset the bus
+ *
+ * @dev: SCSI bus to reset
+ * @return 0 if OK, -ve on error
+ */
+ int (*bus_reset)(struct udevice *dev);
+};
+
+#define scsi_get_ops(dev) ((struct scsi_ops *)(dev)->driver->ops)
+
+extern struct scsi_ops scsi_ops;
+
+/**
+ * scsi_exec() - execute a command
+ *
+ * @dev: SCSI bus
+ * @cmd: Command to execute
+ * Return: 0 if OK, -ve on error
+ */
+int scsi_exec(struct udevice *dev, struct scsi_cmd *cmd);
+
+/**
+ * scsi_bus_reset() - reset the bus
+ *
+ * @dev: SCSI bus to reset
+ * Return: 0 if OK, -ve on error
+ */
+int scsi_bus_reset(struct udevice *dev);
+
+/**
+ * scsi_scan() - Scan all SCSI controllers for available devices
+ *
+ * @vebose: true to show information about each device found
+ */
+int scsi_scan(bool verbose);
-/** @return the number of scsi disks */
-int scsi_get_disk_count(void);
+/**
+ * scsi_scan_dev() - scan a SCSI bus and create devices
+ *
+ * @dev: SCSI bus
+ * @verbose: true to show information about each device found
+ */
+int scsi_scan_dev(struct udevice *dev, bool verbose);
+
+#ifndef CONFIG_DM_SCSI
+void scsi_low_level_init(int busdevfunc);
+void scsi_init(void);
+#endif
#define SCSI_IDENTIFY 0xC0 /* not used */
projects / platform / kernel / u-boot.git / blobdiff