freescale/common/ngpixis.c

1 // SPDX-License-Identifier: GPL-2.0+
3  * Copyright 2010-2011 Freescale Semiconductor
6  * This file provides support for the ngPIXIS, a board-specific FPGA used on
10  * eight "bits".  The ngPIXIS has a set of memory-mapped registers (SWx) that
17  * PIXIS_BASE - The virtual address of the base of the PIXIS register map
19  * PIXIS_LBMAP_SWITCH - The switch number (i.e. the "x" in "SWx"). This value
24  * PIXIS_LBMAP_MASK - A bit mask the defines which bits in SWx to use.
26  * PIXIS_LBMAP_SHIFT - The shift value that corresponds to PIXIS_LBMAP_MASK.
28  * PIXIS_LBMAP_ALTBANK - The value to program into SWx to tell the ngPIXIS to
56  * Reset the board. This ignores the ENx registers.
67  * Reset the board.  Like pixis_reset(), but it honors the ENx registers.
79  * Set the boot bank to the power-on default bank
89 	reg = PIXIS_READ(s[PIXIS_LBMAP_SWITCH - 1].en);  in __clear_altbank()
91 	PIXIS_WRITE(s[PIXIS_LBMAP_SWITCH - 1].en, reg);  in __clear_altbank()
102 	/* Program the alternate bank number into the SWx register.  in __set_altbank()
104 	reg = PIXIS_READ(s[PIXIS_LBMAP_SWITCH - 1].sw);  in __set_altbank()
106 	PIXIS_WRITE(s[PIXIS_LBMAP_SWITCH - 1].sw, reg);  in __set_altbank()
112 	reg = PIXIS_READ(s[PIXIS_LBMAP_SWITCH - 1].en);  in __set_altbank()
114 	PIXIS_WRITE(s[PIXIS_LBMAP_SWITCH - 1].en, reg);  in __set_altbank()
148 		printf("SW%u=%02x/%02x ", i + 1,  in pixis_dump_regs()
149 			PIXIS_READ(s[i].sw), PIXIS_READ(s[i].en));  in pixis_dump_regs()
184 	/* No args is a simple reset request.  in pixis_reset_cmd()
238 	"- hard reset to default bank\n"
239 	"pixis_reset altbank - reset to alternate bank\n"
241 	"pixis_reset dump - display the PIXIS registers\n"
243 	"pixis_reset sysclk <SYSCLK_freq> - reset with SYSCLK frequency(KHz)\n";
248 	"Reset the board using the FPGA sequencer", pixis_help_text