88 lines
2.7 KiB
C
88 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __LINUX_USB_DAPPERMIMEJTAG_H
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#define __LINUX_USB_DAPPERMIMEJTAG_H
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#define DMJ_USB_CFG_PROTO_VER 0x0010
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#define DMJ_RESP_STAT_OK 0x00
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#define DMJ_RESP_STAT_ILLCMD 0x01
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#define DMJ_RESP_STAT_BADMODE 0x02
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#define DMJ_RESP_STAT_NOSUCHMODE 0x03
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#define DMJ_RESP_STAT_BADARG 0x04
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#define DMJ_CMD_CFG_GET_VERSION 0x00
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#define DMJ_CMD_CFG_GET_MODES 0x01
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#define DMJ_CMD_CFG_GET_CUR_MODE 0x02
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#define DMJ_CMD_CFG_SET_CUR_MODE 0x03
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#define DMJ_CMD_CFG_GET_INFOSTR 0x04
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#define DMJ_CMD_MODE_GET_NAME 0x00
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#define DMJ_CMD_MODE_GET_VERSION 0x01
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#define DMJ_CMD_MODE_GET_FEATURES 0x02
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#define DMJ_CMD_MODE1_SPI 0x13
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#define DMJ_CMD_MODE1_I2C 0x14
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#define DMJ_CMD_MODE1_TEMPSENSOR 0x15
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#define DMJ_FEATURE_MODE1_UART (1<<0)
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#define DMJ_FEATURE_MODE1_CMSISDAP (1<<1)
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#define DMJ_FEATURE_MODE1_SPI (1<<2)
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#define DMJ_FEATURE_MODE1_I2C (1<<3)
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#define DMJ_FEATURE_MODE1_TEMPSENSOR (1<<4)
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#define DMJ_XFER_FLAGS_PARSE_RESP (1<<0)
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#define DMJ_XFER_FLAGS_FILL_RECVBUF (1<<1)
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inline static const char *dmj_get_protoerr(int err)
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{
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switch (err) {
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case DMJ_RESP_STAT_OK: return "ok";
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case DMJ_RESP_STAT_ILLCMD: return "unknown/unimplemented command";
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case DMJ_RESP_STAT_BADMODE: return "bad mode";
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case DMJ_RESP_STAT_NOSUCHMODE: return "no such mode available";
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case DMJ_RESP_STAT_BADARG: return "illegal argument";
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default: return "???";
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}
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}
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inline static int dmj_check_retval(int ret, int len, struct device *dev,
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const char *pfix, bool check_pos_val, int lmin, int lmax)
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{
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if (ret < 0) {
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dev_err(dev, "%s: USB fail: %d\n", pfix, ret);
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return ret;
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}
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if (ret && check_pos_val) {
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dev_err(dev, "%s: USB protocol fail: %s (%d)\n", pfix, dmj_get_protoerr(ret), ret);
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return -EIO;
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}
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if (len < lmin && lmin >= 0) {
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dev_err(dev, "%s: USB reply too short: %d\n", pfix, len);
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return -EREMOTEIO;
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}
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if (len > lmax && lmax >= 0) {
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dev_err(dev, "%s: USB reply too long: %d\n", pfix, len);
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return -EMSGSIZE;
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}
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return 0;
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}
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/* TODO: split up in "raw" read & writes, and higher-level ones with cmd and
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* repstat, because the way this is currently overloaded, is, bad */
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int dmj_transfer(struct platform_device *pdev, int cmd, int recvflags,
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const void *wbuf, int wbufsize, void **rbuf, int *rbufsize);
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inline static int dmj_read(struct platform_device *pdev, int recvflags,
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void **rbuf, int *rbufsize)
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{
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return dmj_transfer(pdev, -1, recvflags, NULL, 0, rbuf, rbufsize);
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}
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inline static int dmj_write(struct platform_device *pdev, int cmd,
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const void *wbuf, int wbufsize)
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{
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return dmj_transfer(pdev, cmd, DMJ_XFER_FLAGS_PARSE_RESP, wbuf, wbufsize, NULL, NULL);
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}
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#endif
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