1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2006 Freescale Semiconductor, Inc. 4 * 5 * Dave Liu <daveliu@freescale.com> 6 * based on source code of Shlomi Gridish 7 */ 8 9 #include <common.h> 10 #include <linux/errno.h> 11 #include <asm/io.h> 12 #include <asm/immap_83xx.h> 13 14 #define NUM_OF_PINS 32 15 void qe_config_iopin(u8 port, u8 pin, int dir, int open_drain, int assign) 16 { 17 u32 pin_2bit_mask; 18 u32 pin_2bit_dir; 19 u32 pin_2bit_assign; 20 u32 pin_1bit_mask; 21 u32 tmp_val; 22 volatile immap_t *im = (volatile immap_t *)CONFIG_SYS_IMMR; 23 volatile qepio83xx_t *par_io = (volatile qepio83xx_t *)&im->qepio; 24 25 /* Calculate pin location and 2bit mask and dir */ 26 pin_2bit_mask = (u32)(0x3 << (NUM_OF_PINS-(pin%(NUM_OF_PINS/2)+1)*2)); 27 pin_2bit_dir = (u32)(dir << (NUM_OF_PINS-(pin%(NUM_OF_PINS/2)+1)*2)); 28 29 /* Setup the direction */ 30 tmp_val = (pin > (NUM_OF_PINS/2) - 1) ? \ 31 in_be32(&par_io->ioport[port].dir2) : 32 in_be32(&par_io->ioport[port].dir1); 33 34 if (pin > (NUM_OF_PINS/2) -1) { 35 out_be32(&par_io->ioport[port].dir2, ~pin_2bit_mask & tmp_val); 36 out_be32(&par_io->ioport[port].dir2, pin_2bit_dir | tmp_val); 37 } else { 38 out_be32(&par_io->ioport[port].dir1, ~pin_2bit_mask & tmp_val); 39 out_be32(&par_io->ioport[port].dir1, pin_2bit_dir | tmp_val); 40 } 41 42 /* Calculate pin location for 1bit mask */ 43 pin_1bit_mask = (u32)(1 << (NUM_OF_PINS - (pin+1))); 44 45 /* Setup the open drain */ 46 tmp_val = in_be32(&par_io->ioport[port].podr); 47 if (open_drain) { 48 out_be32(&par_io->ioport[port].podr, pin_1bit_mask | tmp_val); 49 } else { 50 out_be32(&par_io->ioport[port].podr, ~pin_1bit_mask & tmp_val); 51 } 52 53 /* Setup the assignment */ 54 tmp_val = (pin > (NUM_OF_PINS/2) - 1) ? 55 in_be32(&par_io->ioport[port].ppar2): 56 in_be32(&par_io->ioport[port].ppar1); 57 pin_2bit_assign = (u32)(assign 58 << (NUM_OF_PINS - (pin%(NUM_OF_PINS/2)+1)*2)); 59 60 /* Clear and set 2 bits mask */ 61 if (pin > (NUM_OF_PINS/2) - 1) { 62 out_be32(&par_io->ioport[port].ppar2, ~pin_2bit_mask & tmp_val); 63 out_be32(&par_io->ioport[port].ppar2, pin_2bit_assign | tmp_val); 64 } else { 65 out_be32(&par_io->ioport[port].ppar1, ~pin_2bit_mask & tmp_val); 66 out_be32(&par_io->ioport[port].ppar1, pin_2bit_assign | tmp_val); 67 } 68 } 69