21 #include "bch-regs.h"
25 #define GPMI_NAND_BCH_REGS_ADDR_RES_NAME   "bch"
26 #define GPMI_NAND_BCH_INTERRUPT_RES_NAME   "bch"
66  * But in MX23, there is a hardware bug in the BCH block (see erratum #2847).
67  * If you try to soft reset the BCH block, it becomes unusable until
69  * boots by NAND, the ROM of the chip will initialize the BCH blocks itself.
70  * So If the driver tries to reset the BCH again, the BCH will not work anymore.
160 	 * Reset BCH here, too. We got failures otherwise :(  in gpmi_init()
161 	 * See later BCH reset for explanation of MX23 and MX28 handling  in gpmi_init()
177 	/* Select BCH ECC. */  in gpmi_init()
206 	/* start to print out the BCH info */  in gpmi_dump_info()
207 	dev_err(this->dev, "Show BCH registers :\n");  in gpmi_dump_info()
212 	dev_err(this->dev, "BCH Geometry :\n"  in gpmi_dump_info()
316 	 *	P : the page size for BCH module.  in set_geometry_by_ecc_info()
409 	 * enough space for BCH.  in legacy_set_geometry()
533 /* Configures the geometry for BCH.  */
550 	* Due to erratum #2847 of the MX23, the BCH cannot be soft reset on this  in bch_set_geometry()
551 	* chip, otherwise it will lock up. So we skip resetting BCH on the MX23.  in bch_set_geometry()
767 /* Clears a BCH interrupt. */
801 	 * raw_len is the length to read/write including bch data which  in gpmi_raw_len_to_len()
804 	if (this->bch)  in gpmi_raw_len_to_len()
983 		dev_err(this->dev, "error requesting BCH IRQ\n");  in acquire_bch_irq()
1312 	this->bch = true;  in gpmi_ecc_read_page()
1406 	this->bch = true;  in gpmi_ecc_read_subpage()
1412 	dev_dbg(this->dev, "page:%d(%d:%d)%d, chunk:(%d:%d), BCH PG size:%d\n",  in gpmi_ecc_read_subpage()
1431 	this->bch = true;  in gpmi_ecc_write_page()
1561  * The tricky part in the GPMI/BCH controller is that it stores ECC bits
1646  * The tricky part in the GPMI/BCH controller is that it stores ECC bits
2001 	/* Set up the NFC geometry which is used by BCH. */  in gpmi_set_geometry()
2004 		dev_err(this->dev, "Error setting BCH geometry : %d\n", ret);  in gpmi_set_geometry()
2173 	if (this->bch) {  in gpmi_chain_data_read()
2188 	if (!this->bch)  in gpmi_chain_data_read()
2219 	if (this->bch) {  in gpmi_chain_data_write()
2231 				      (this->bch ? MXS_DMA_CTRL_WAIT4END : 0));  in gpmi_chain_data_write()
2235 	if (!this->bch)  in gpmi_chain_data_write()
2343 	if (this->bch) {  in gpmi_nfc_exec_op()
2350 	if (this->bch && buf_read) {  in gpmi_nfc_exec_op()
2392 	this->bch = false;  in gpmi_nfc_exec_op()
2589 	/* re-init the BCH registers */  in gpmi_pm_resume()
2592 		dev_err(this->dev, "Error setting BCH : %d\n", ret);  in gpmi_pm_resume()