1 /* 2 * Copyright (C) 2006 Freescale Semiconductor, Inc. 3 * 4 * Dave Liu <daveliu@freescale.com> 5 * based on source code of Shlomi Gridish 6 * 7 * SPDX-License-Identifier: GPL-2.0+ 8 */ 9 10 #include <common.h> 11 #include <linux/errno.h> 12 #include <asm/io.h> 13 #include <asm/immap_83xx.h> 14 15 #define NUM_OF_PINS 32 16 void qe_config_iopin(u8 port, u8 pin, int dir, int open_drain, int assign) 17 { 18 u32 pin_2bit_mask; 19 u32 pin_2bit_dir; 20 u32 pin_2bit_assign; 21 u32 pin_1bit_mask; 22 u32 tmp_val; 23 volatile immap_t *im = (volatile immap_t *)CONFIG_SYS_IMMR; 24 volatile qepio83xx_t *par_io = (volatile qepio83xx_t *)&im->qepio; 25 26 /* Calculate pin location and 2bit mask and dir */ 27 pin_2bit_mask = (u32)(0x3 << (NUM_OF_PINS-(pin%(NUM_OF_PINS/2)+1)*2)); 28 pin_2bit_dir = (u32)(dir << (NUM_OF_PINS-(pin%(NUM_OF_PINS/2)+1)*2)); 29 30 /* Setup the direction */ 31 tmp_val = (pin > (NUM_OF_PINS/2) - 1) ? \ 32 in_be32(&par_io->ioport[port].dir2) : 33 in_be32(&par_io->ioport[port].dir1); 34 35 if (pin > (NUM_OF_PINS/2) -1) { 36 out_be32(&par_io->ioport[port].dir2, ~pin_2bit_mask & tmp_val); 37 out_be32(&par_io->ioport[port].dir2, pin_2bit_dir | tmp_val); 38 } else { 39 out_be32(&par_io->ioport[port].dir1, ~pin_2bit_mask & tmp_val); 40 out_be32(&par_io->ioport[port].dir1, pin_2bit_dir | tmp_val); 41 } 42 43 /* Calculate pin location for 1bit mask */ 44 pin_1bit_mask = (u32)(1 << (NUM_OF_PINS - (pin+1))); 45 46 /* Setup the open drain */ 47 tmp_val = in_be32(&par_io->ioport[port].podr); 48 if (open_drain) { 49 out_be32(&par_io->ioport[port].podr, pin_1bit_mask | tmp_val); 50 } else { 51 out_be32(&par_io->ioport[port].podr, ~pin_1bit_mask & tmp_val); 52 } 53 54 /* Setup the assignment */ 55 tmp_val = (pin > (NUM_OF_PINS/2) - 1) ? 56 in_be32(&par_io->ioport[port].ppar2): 57 in_be32(&par_io->ioport[port].ppar1); 58 pin_2bit_assign = (u32)(assign 59 << (NUM_OF_PINS - (pin%(NUM_OF_PINS/2)+1)*2)); 60 61 /* Clear and set 2 bits mask */ 62 if (pin > (NUM_OF_PINS/2) - 1) { 63 out_be32(&par_io->ioport[port].ppar2, ~pin_2bit_mask & tmp_val); 64 out_be32(&par_io->ioport[port].ppar2, pin_2bit_assign | tmp_val); 65 } else { 66 out_be32(&par_io->ioport[port].ppar1, ~pin_2bit_mask & tmp_val); 67 out_be32(&par_io->ioport[port].ppar1, pin_2bit_assign | tmp_val); 68 } 69 } 70