leandrof/u-boot
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
12e396303c
u-boot/drivers/pinctrl/pinctrl-qe-io.c
Heiko Schocher 5990b05951 powerpc, qe: add DTS support for parallel I/O ports 
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
2020-09-17 06:09:53 +02:00

256 lines
6.2 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2006 Freescale Semiconductor, Inc.
*
* Dave Liu <daveliu@freescale.com>
* based on source code of Shlomi Gridish
*/
#include <common.h>
#include <linux/errno.h>
#include <asm/io.h>
#include <asm/immap_83xx.h>
#if defined(CONFIG_PINCTRL)
#include <dm.h>
#include <dm/device_compat.h>
#include <dm/pinctrl.h>
#include <linux/ioport.h>
/**
* struct qe_io_platdata
*
* @base: Base register address
* @num_par_io_ports number of io ports
*/
struct qe_io_platdata {
qepio83xx_t *base;
u32 num_io_ports;
};
#endif
#define NUM_OF_PINS 32
/** qe_cfg_iopin configure one io pin setting
*
* @par_io: pointer to parallel I/O base
* @port: io pin port
* @pin: io pin number which get configured
* @dir: direction of io pin 2 bits valid
* 00 = pin disabled
* 01 = output
* 10 = input
* 11 = pin is I/O
* @open_drain: is pin open drain
* @assign: pin assignment registers select the function of the pin
*/
static void qe_cfg_iopin(qepio83xx_t *par_io, u8 port, u8 pin, int dir,
int open_drain, int assign)
{
u32 dbit_mask;
u32 dbit_dir;
u32 dbit_asgn;
u32 bit_mask;
u32 tmp_val;
int offset;
offset = (NUM_OF_PINS - (pin % (NUM_OF_PINS / 2) + 1) * 2);
/* Calculate pin location and 2bit mask and dir */
dbit_mask = (u32)(0x3 << offset);
dbit_dir = (u32)(dir << offset);
/* Setup the direction */
tmp_val = (pin > (NUM_OF_PINS / 2) - 1) ?
in_be32(&par_io->ioport[port].dir2) :
in_be32(&par_io->ioport[port].dir1);
if (pin > (NUM_OF_PINS / 2) - 1) {
out_be32(&par_io->ioport[port].dir2, ~dbit_mask & tmp_val);
out_be32(&par_io->ioport[port].dir2, dbit_dir | tmp_val);
} else {
out_be32(&par_io->ioport[port].dir1, ~dbit_mask & tmp_val);
out_be32(&par_io->ioport[port].dir1, dbit_dir | tmp_val);
}
/* Calculate pin location for 1bit mask */
bit_mask = (u32)(1 << (NUM_OF_PINS - (pin + 1)));
/* Setup the open drain */
tmp_val = in_be32(&par_io->ioport[port].podr);
if (open_drain)
out_be32(&par_io->ioport[port].podr, bit_mask | tmp_val);
else
out_be32(&par_io->ioport[port].podr, ~bit_mask & tmp_val);
/* Setup the assignment */
tmp_val = (pin > (NUM_OF_PINS / 2) - 1) ?
in_be32(&par_io->ioport[port].ppar2) :
in_be32(&par_io->ioport[port].ppar1);
dbit_asgn = (u32)(assign << offset);
/* Clear and set 2 bits mask */
if (pin > (NUM_OF_PINS / 2) - 1) {
out_be32(&par_io->ioport[port].ppar2, ~dbit_mask & tmp_val);
out_be32(&par_io->ioport[port].ppar2, dbit_asgn | tmp_val);
} else {
out_be32(&par_io->ioport[port].ppar1, ~dbit_mask & tmp_val);
out_be32(&par_io->ioport[port].ppar1, dbit_asgn | tmp_val);
}
}
#if !defined(CONFIG_PINCTRL)
/** qe_config_iopin configure one io pin setting
*
* @port: io pin port
* @pin: io pin number which get configured
* @dir: direction of io pin 2 bits valid
* 00 = pin disabled
* 01 = output
* 10 = input
* 11 = pin is I/O
* @open_drain: is pin open drain
* @assign: pin assignment registers select the function of the pin
*/
void qe_config_iopin(u8 port, u8 pin, int dir, int open_drain, int assign)
{
immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
qepio83xx_t *par_io = (qepio83xx_t *)&im->qepio;
qe_cfg_iopin(par_io, port, pin, dir, open_drain, assign);
}
#else
static int qe_io_ofdata_to_platdata(struct udevice *dev)
{
struct qe_io_platdata *plat = dev->platdata;
fdt_addr_t addr;
addr = dev_read_addr(dev);
if (addr == FDT_ADDR_T_NONE)
return -EINVAL;
plat->base = (qepio83xx_t *)addr;
if (dev_read_u32(dev, "num-ports", &plat->num_io_ports))
return -EINVAL;
return 0;
}
/**
* par_io_of_config_node config
* @dev: pointer to pinctrl device
* @pio: ofnode of pinconfig property
*/
static int par_io_of_config_node(struct udevice *dev, ofnode pio)
{
struct qe_io_platdata *plat = dev->platdata;
qepio83xx_t *par_io = plat->base;
const unsigned int *pio_map;
int pio_map_len;
pio_map = ofnode_get_property(pio, "pio-map", &pio_map_len);
if (!pio_map)
return -ENOENT;
pio_map_len /= sizeof(unsigned int);
if ((pio_map_len % 6) != 0) {
dev_err(dev, "%s: pio-map format wrong!\n", __func__);
return -EINVAL;
}
while (pio_map_len > 0) {
/*
* column pio_map[5] from linux (has_irq) not
* supported in u-boot yet.
*/
qe_cfg_iopin(par_io, (u8)pio_map[0], (u8)pio_map[1],
(int)pio_map[2], (int)pio_map[3],
(int)pio_map[4]);
pio_map += 6;
pio_map_len -= 6;
}
return 0;
}
int par_io_of_config(struct udevice *dev)
{
u32 phandle;
ofnode pio;
int err;
err = ofnode_read_u32(dev_ofnode(dev), "pio-handle", &phandle);
if (err) {
dev_err(dev, "%s: pio-handle not available\n", __func__);
return err;
}
pio = ofnode_get_by_phandle(phandle);
if (!ofnode_valid(pio)) {
dev_err(dev, "%s: unable to find node\n", __func__);
return -EINVAL;
}
/* To Do: find pinctrl device and pass it */
return par_io_of_config_node(NULL, pio);
}
/*
* This is not nice!
* pinsettings should work with "pinctrl-" properties.
* Unfortunately on mpc83xx powerpc linux device trees
* devices handle this with "pio-handle" properties ...
*
* Even worser, old board code inits all par_io
* pins in one step, if U-Boot uses the device
* or not. So init all par_io definitions here too
* as linux does this also.
*/
static void config_qe_ioports(struct udevice *dev)
{
ofnode ofn;
for (ofn = dev_read_first_subnode(dev); ofnode_valid(ofn);
ofn = dev_read_next_subnode(ofn)) {
/*
* ignore errors here, as may the subnode
* has no pio-handle
*/
par_io_of_config_node(dev, ofn);
}
}
static int par_io_pinctrl_probe(struct udevice *dev)
{
config_qe_ioports(dev);
return 0;
}
static int par_io_pinctrl_set_state(struct udevice *dev, struct udevice *config)
{
return 0;
}
const struct pinctrl_ops par_io_pinctrl_ops = {
.set_state = par_io_pinctrl_set_state,
};
static const struct udevice_id par_io_pinctrl_match[] = {
{ .compatible = "fsl,mpc8360-par_io"},
{ /* sentinel */ }
};
U_BOOT_DRIVER(par_io_pinctrl) = {
.name = "par-io-pinctrl",
.id = UCLASS_PINCTRL,
.of_match = of_match_ptr(par_io_pinctrl_match),
.probe = par_io_pinctrl_probe,
.ofdata_to_platdata = qe_io_ofdata_to_platdata,
.platdata_auto_alloc_size = sizeof(struct qe_io_platdata),
.ops = &par_io_pinctrl_ops,
#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
.flags = DM_FLAG_PRE_RELOC,
#endif
};
#endif
Reference in New Issue View Git Blame Copy Permalink