mtd/spi/sf_dataflash.c

29 /* group B requests can run even while status reports "busy" */
81 /* Return the status of the DataFlash device */
86 	u8 status;
92 	ret =  spi_write_then_read(spi, &opcode, 1, NULL, &status, 1);
93 	return ret ? -EIO : status;
103 	int status;
109 		status = dataflash_status(spi);
110 		if (status < 0)
111 			status = 0;
113 		if (status & (1 << 7))	/* RDY/nBSY */
114 			return status;
131 	int			status;
157 	status = spi_claim_bus(spi);
158 	if (status) {
160 		return status;
184 		status = spi_write_then_read(spi, command, 4, NULL, NULL, 0);
185 		if (status < 0) {
190 		status = dataflash_waitready(spi);
191 		if (status < 0) {
193 			return status;
224 	int			status;
242 	status = spi_claim_bus(spi);
243 	if (status) {
245 		return status;
259 	status = spi_write_then_read(spi, command, 8, NULL, buf, len);
263 	return status;
282 	int			status = -EINVAL;
300 	status = spi_claim_bus(spi);
301 	if (status) {
303 		return status;
338 			status = spi_write_then_read(spi, command, 4,
340 			if (status < 0) {
346 			status = dataflash_waitready(spi);
347 			if (status < 0) {
350 				return status;
364 		status = spi_write_then_read(spi, command, 4,
366 		if (status < 0) {
371 		status = dataflash_waitready(spi);
372 		if (status < 0) {
374 			return status;
388 		status = spi_write_then_read(spi, command, 4,
390 		if (status < 0) {
396 		status = dataflash_waitready(spi);
399 		if (status & (1 << 6)) {
401 			       pageaddr, status);
403 			status = -EIO;
406 			status = 0;
523 	int status;
533 				status = dataflash_status(spi);
534 				if (status < 0) {
535 					debug("dataflash: status error %d\n",
536 					      status);
537 					return ERR_PTR(status);
539 				if (status & 0x1) {
609  * or else the ID code embedded in the status bits:
626 	int status;
632 	status = spi_claim_bus(spi);
633 	if (status)
634 		return status;
647 		status = add_dataflash(dev, info->name, info->nr_pages,
650 		if (status < 0)
653 			return status;
658 	* capacity using bits in the status byte.
660 	status = dataflash_status(spi);
661 	if (status <= 0 || status == 0xff) {
662 		printf("dataflash: read status error %d\n", status);
663 		if (status == 0 || status == 0xff)
664 			status = -ENODEV;
673 	switch (status & 0x3c) {
675 		status = add_dataflash(dev, "AT45DB011B", 512, 264, 9, 0);
678 		status = add_dataflash(dev, "AT45DB021B", 1024, 264, 9, 0);
681 		status = add_dataflash(dev, "AT45DB041x", 2048, 264, 9, 0);
684 		status = add_dataflash(dev, "AT45DB081B", 4096, 264, 9, 0);
687 		status = add_dataflash(dev, "AT45DB161x", 4096, 528, 10, 0);
690 		status = add_dataflash(dev, "AT45DB321x", 8192, 528, 10, 0);
694 		status = add_dataflash(dev, "AT45DB642x", 8192, 1056, 11, 0);
698 		printf("dataflash: unsupported device (%x)\n", status & 0x3c);
699 		status = -ENODEV;
703 	return status;
709 	return status;