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The QRIO GPIO functions can be of general interest. They are thus added to a qrio.c and their prototype are available from kmp204x.h. The QRIO prst function are also included in this file, as well as the functions required for the I2C deblocking support (open-drain). Signed-off-by: Valentin Longchamp <valentin.longchamp@keymile.com> [York Sun: Remove extra blank line in board/keymile/kmp204x/qrio.c] Signed-off-by: York Sun <yorksun@freescale.com>
146 lines
2.7 KiB
C
146 lines
2.7 KiB
C
/*
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* (C) Copyright 2013 Keymile AG
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* Valentin Longchamp <valentin.longchamp@keymile.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include "../common/common.h"
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#include "kmp204x.h"
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/* QRIO GPIO register offsets */
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#define DIRECT_OFF 0x18
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#define GPRT_OFF 0x1c
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int qrio_get_gpio(u8 port_off, u8 gpio_nr)
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{
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u32 gprt;
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void __iomem *qrio_base = (void *)CONFIG_SYS_QRIO_BASE;
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gprt = in_be32(qrio_base + port_off + GPRT_OFF);
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return (gprt >> gpio_nr) & 1U;
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}
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void qrio_set_gpio(u8 port_off, u8 gpio_nr, bool value)
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{
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u32 gprt, mask;
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void __iomem *qrio_base = (void *)CONFIG_SYS_QRIO_BASE;
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mask = 1U << gpio_nr;
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gprt = in_be32(qrio_base + port_off + GPRT_OFF);
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if (value)
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gprt |= mask;
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else
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gprt &= ~mask;
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out_be32(qrio_base + port_off + GPRT_OFF, gprt);
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}
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void qrio_gpio_direction_output(u8 port_off, u8 gpio_nr, bool value)
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{
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u32 direct, mask;
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void __iomem *qrio_base = (void *)CONFIG_SYS_QRIO_BASE;
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mask = 1U << gpio_nr;
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direct = in_be32(qrio_base + port_off + DIRECT_OFF);
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direct |= mask;
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out_be32(qrio_base + port_off + DIRECT_OFF, direct);
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qrio_set_gpio(port_off, gpio_nr, value);
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}
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void qrio_gpio_direction_input(u8 port_off, u8 gpio_nr)
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{
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u32 direct, mask;
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void __iomem *qrio_base = (void *)CONFIG_SYS_QRIO_BASE;
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mask = 1U << gpio_nr;
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direct = in_be32(qrio_base + port_off + DIRECT_OFF);
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direct &= ~mask;
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out_be32(qrio_base + port_off + DIRECT_OFF, direct);
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}
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void qrio_set_opendrain_gpio(u8 port_off, u8 gpio_nr, u8 val)
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{
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u32 direct, mask;
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void __iomem *qrio_base = (void *)CONFIG_SYS_QRIO_BASE;
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mask = 1U << gpio_nr;
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direct = in_be32(qrio_base + port_off + DIRECT_OFF);
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if (val == 0)
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/* set to output -> GPIO drives low */
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direct |= mask;
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else
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/* set to input -> GPIO floating */
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direct &= ~mask;
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out_be32(qrio_base + port_off + DIRECT_OFF, direct);
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}
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#define WDMASK_OFF 0x16
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static void qrio_wdmask(u8 bit, bool wden)
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{
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u16 wdmask;
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void __iomem *qrio_base = (void *)CONFIG_SYS_QRIO_BASE;
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wdmask = in_be16(qrio_base + WDMASK_OFF);
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if (wden)
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wdmask |= (1 << bit);
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else
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wdmask &= ~(1 << bit);
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out_be16(qrio_base + WDMASK_OFF, wdmask);
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}
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#define PRST_OFF 0x1a
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void qrio_prst(u8 bit, bool en, bool wden)
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{
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u16 prst;
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void __iomem *qrio_base = (void *)CONFIG_SYS_QRIO_BASE;
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qrio_wdmask(bit, wden);
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prst = in_be16(qrio_base + PRST_OFF);
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if (en)
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prst &= ~(1 << bit);
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else
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prst |= (1 << bit);
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out_be16(qrio_base + PRST_OFF, prst);
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}
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#define PRSTCFG_OFF 0x1c
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void qrio_prstcfg(u8 bit, u8 mode)
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{
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u32 prstcfg;
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u8 i;
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void __iomem *qrio_base = (void *)CONFIG_SYS_QRIO_BASE;
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prstcfg = in_be32(qrio_base + PRSTCFG_OFF);
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for (i = 0; i < 2; i++) {
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if (mode & (1<<i))
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set_bit(2*bit+i, &prstcfg);
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else
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clear_bit(2*bit+i, &prstcfg);
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}
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out_be32(qrio_base + PRSTCFG_OFF, prstcfg);
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}
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