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https://github.com/AsahiLinux/u-boot
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5990b05951
add DM support for parallel I/O ports on QUICC Engine Block Signed-off-by: Heiko Schocher <hs@denx.de> Patch-cc: Mario Six <mario.six@gdsys.cc> Patch-cc: Qiang Zhao <qiang.zhao@nxp.com> Patch-cc: Holger Brunck <holger.brunck@hitachi-powergrids.com> Series-changes: 2 - remove RFC - fixed Codingstyle errors, therefore new patch powerpc, mpc83xx: fix codingstyle issues for qe_io.c - moved DM part to drivers/pinctrl Commit-notes: Open questions / discussion: - I let the old none DM based implementation in code so boards should work with old implementation. This should be removed if all boards are converted to DM/DTS. - Unfortunately linux DTS does not use "pinctrl-" properties, instead "pio-handle" properties. Even worser old U-Boot code initializes all pins defined in "const qe_iop_conf_t qe_iop_conf_tab[]" table in board code. As linux does the same I decided to also scan through all subnodes containing "pio-map" property and initialize them too. The proper solution would be to check for "pio-handle" when a device is probed. END
104 lines
2.9 KiB
C
104 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2006 Freescale Semiconductor, Inc.
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*
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* Dave Liu <daveliu@freescale.com>
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* based on source code of Shlomi Gridish
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*/
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#include <common.h>
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#include <linux/errno.h>
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#include <asm/io.h>
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#include <asm/immap_83xx.h>
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#define NUM_OF_PINS 32
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/** qe_cfg_iopin configure one io pin setting
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*
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* @par_io: pointer to parallel I/O base
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* @port: io pin port
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* @pin: io pin number which get configured
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* @dir: direction of io pin 2 bits valid
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* 00 = pin disabled
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* 01 = output
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* 10 = input
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* 11 = pin is I/O
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* @open_drain: is pin open drain
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* @assign: pin assignment registers select the function of the pin
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*/
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static void qe_cfg_iopin(qepio83xx_t *par_io, u8 port, u8 pin, int dir,
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int open_drain, int assign)
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{
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u32 dbit_mask;
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u32 dbit_dir;
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u32 dbit_asgn;
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u32 bit_mask;
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u32 tmp_val;
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int offset;
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offset = (NUM_OF_PINS - (pin % (NUM_OF_PINS / 2) + 1) * 2);
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/* Calculate pin location and 2bit mask and dir */
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dbit_mask = (u32)(0x3 << offset);
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dbit_dir = (u32)(dir << offset);
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/* Setup the direction */
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tmp_val = (pin > (NUM_OF_PINS / 2) - 1) ?
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in_be32(&par_io->ioport[port].dir2) :
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in_be32(&par_io->ioport[port].dir1);
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if (pin > (NUM_OF_PINS / 2) - 1) {
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out_be32(&par_io->ioport[port].dir2, ~dbit_mask & tmp_val);
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out_be32(&par_io->ioport[port].dir2, dbit_dir | tmp_val);
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} else {
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out_be32(&par_io->ioport[port].dir1, ~dbit_mask & tmp_val);
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out_be32(&par_io->ioport[port].dir1, dbit_dir | tmp_val);
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}
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/* Calculate pin location for 1bit mask */
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bit_mask = (u32)(1 << (NUM_OF_PINS - (pin + 1)));
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/* Setup the open drain */
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tmp_val = in_be32(&par_io->ioport[port].podr);
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if (open_drain)
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out_be32(&par_io->ioport[port].podr, bit_mask | tmp_val);
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else
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out_be32(&par_io->ioport[port].podr, ~bit_mask & tmp_val);
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/* Setup the assignment */
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tmp_val = (pin > (NUM_OF_PINS / 2) - 1) ?
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in_be32(&par_io->ioport[port].ppar2) :
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in_be32(&par_io->ioport[port].ppar1);
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dbit_asgn = (u32)(assign << offset);
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/* Clear and set 2 bits mask */
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if (pin > (NUM_OF_PINS / 2) - 1) {
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out_be32(&par_io->ioport[port].ppar2, ~dbit_mask & tmp_val);
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out_be32(&par_io->ioport[port].ppar2, dbit_asgn | tmp_val);
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} else {
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out_be32(&par_io->ioport[port].ppar1, ~dbit_mask & tmp_val);
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out_be32(&par_io->ioport[port].ppar1, dbit_asgn | tmp_val);
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}
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}
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#if !defined(CONFIG_PINCTRL)
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/** qe_config_iopin configure one io pin setting
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*
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* @port: io pin port
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* @pin: io pin number which get configured
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* @dir: direction of io pin 2 bits valid
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* 00 = pin disabled
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* 01 = output
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* 10 = input
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* 11 = pin is I/O
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* @open_drain: is pin open drain
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* @assign: pin assignment registers select the function of the pin
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*/
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void qe_config_iopin(u8 port, u8 pin, int dir, int open_drain, int assign)
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{
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immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
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qepio83xx_t *par_io = (qepio83xx_t *)&im->qepio;
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qe_cfg_iopin(par_io, port, pin, dir, open_drain, assign);
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}
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#endif
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