1 // SPDX-License-Identifier: GPL-2.0-only
8  * 22/05/2001	RMK	- Lock read against write
9  *			- merge printk level changes (with mods) from Alan Cox.
10  *			- use *ppos as the file position, not file->f_pos.
11  *			- fix check for out of range pos and r/w size
34 #include <asm/mach-types.h>
53 static bool flashdebug;		//if set - we will display progress msgs
96 static long flash_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)  in flash_ioctl()  argument
99 	switch (cmd) {  in flash_ioctl()
117 		return -EINVAL;  in flash_ioctl()
132 	 * We now lock against reads and writes. --rmk  in flash_read()
135 		return -ERESTARTSYS;  in flash_read()
157 		return -EINVAL;  in flash_write()
160 		return -EINVAL;  in flash_write()
166 		return count ? -ENXIO : 0;  in flash_write()
168 	if (count > gbFlashSize - p)  in flash_write()
169 		count = gbFlashSize - p;  in flash_write()
172 		return -EFAULT;  in flash_write()
175 	 * We now lock against reads and writes. --rmk  in flash_write()
178 		return -ERESTARTSYS;  in flash_write()
187 	temp = ((int) (p + count) >> 16) - nBlock + 1;  in flash_write()
193 		temp -= 1;  in flash_write()
199 	for (; temp; temp--, nBlock++) {  in flash_write()
221 			       count - written);  in flash_write()
226 		rc = write_block(p, buf, count - written);  in flash_write()
242 				rc = -1;  in flash_write()
270  * it has no meaning, so it returns -EINVAL.
296 	unsigned long timeout;  in erase_block()  local
337 	 * wait 10 ms  in erase_block()
344 	timeout = jiffies + 10 * HZ;  in erase_block()
346 	while (!(c1 & 0x80) && time_before(jiffies, timeout)) {  in erase_block()
372 		return -2;  in erase_block()
376 	 * just to make sure - verify if erased OK...  in erase_block()
386 			return -1;  in erase_block()
404 	unsigned long timeout;  in write_block()  local
415 		count = 0x10000 - offset;  in write_block()
420 	timeout = jiffies + 30 * HZ;  in write_block()
426 			return -EFAULT;  in write_block()
445 		 * write cmd  in write_block()
473 		 * if timeout getting status  in write_block()
494 		 * if hardware reports an error writing, and not timeout -   in write_block()
505 			 * before timeout?  in write_block()
507 			if (time_before(jiffies, timeout)) {  in write_block()
510 					       pWritePtr - FLASH_BASE);  in write_block()
513 				 * wait couple ms  in write_block()
519 				printk(KERN_ERR "write_block: timeout at 0x%X\n",  in write_block()
520 				       pWritePtr - FLASH_BASE);  in write_block()
522 				 * return error -2  in write_block()
524 				return -2;  in write_block()
537 			return -EFAULT;  in write_block()
541 			       pWritePtr - FLASH_BASE, c1, c);  in write_block()
556 	 * the write gate, which will be open for about the next 2ms.  in kick_open()
586 	int ret = -ENODEV;  in nwflash_init()
597 			ret = -ENXIO;  in nwflash_init()