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![Srinivas Kandagatla](/assets/img/avatar_default.png)
Probe function had commas instead of semi-colons on some of the lines. This patch just fixes those lines. No functional chagnes done in this patch. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
1404 lines
39 KiB
C
1404 lines
39 KiB
C
/*
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* Copyright (C) 2013 STMicroelectronics (R&D) Limited.
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* Authors:
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* Srinivas Kandagatla <srinivas.kandagatla@st.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/err.h>
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/of_gpio.h>
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#include <linux/of_address.h>
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#include <linux/regmap.h>
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#include <linux/mfd/syscon.h>
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#include <linux/pinctrl/pinctrl.h>
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#include <linux/pinctrl/pinmux.h>
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#include <linux/pinctrl/pinconf.h>
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#include <linux/platform_device.h>
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#include "core.h"
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/* PIO Block registers */
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/* PIO output */
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#define REG_PIO_POUT 0x00
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/* Set bits of POUT */
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#define REG_PIO_SET_POUT 0x04
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/* Clear bits of POUT */
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#define REG_PIO_CLR_POUT 0x08
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/* PIO input */
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#define REG_PIO_PIN 0x10
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/* PIO configuration */
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#define REG_PIO_PC(n) (0x20 + (n) * 0x10)
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/* Set bits of PC[2:0] */
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#define REG_PIO_SET_PC(n) (0x24 + (n) * 0x10)
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/* Clear bits of PC[2:0] */
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#define REG_PIO_CLR_PC(n) (0x28 + (n) * 0x10)
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/* PIO input comparison */
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#define REG_PIO_PCOMP 0x50
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/* Set bits of PCOMP */
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#define REG_PIO_SET_PCOMP 0x54
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/* Clear bits of PCOMP */
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#define REG_PIO_CLR_PCOMP 0x58
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/* PIO input comparison mask */
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#define REG_PIO_PMASK 0x60
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/* Set bits of PMASK */
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#define REG_PIO_SET_PMASK 0x64
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/* Clear bits of PMASK */
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#define REG_PIO_CLR_PMASK 0x68
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#define ST_GPIO_DIRECTION_BIDIR 0x1
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#define ST_GPIO_DIRECTION_OUT 0x2
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#define ST_GPIO_DIRECTION_IN 0x4
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/**
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* Packed style retime configuration.
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* There are two registers cfg0 and cfg1 in this style for each bank.
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* Each field in this register is 8 bit corresponding to 8 pins in the bank.
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*/
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#define RT_P_CFGS_PER_BANK 2
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#define RT_P_CFG0_CLK1NOTCLK0_FIELD(reg) REG_FIELD(reg, 0, 7)
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#define RT_P_CFG0_DELAY_0_FIELD(reg) REG_FIELD(reg, 16, 23)
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#define RT_P_CFG0_DELAY_1_FIELD(reg) REG_FIELD(reg, 24, 31)
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#define RT_P_CFG1_INVERTCLK_FIELD(reg) REG_FIELD(reg, 0, 7)
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#define RT_P_CFG1_RETIME_FIELD(reg) REG_FIELD(reg, 8, 15)
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#define RT_P_CFG1_CLKNOTDATA_FIELD(reg) REG_FIELD(reg, 16, 23)
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#define RT_P_CFG1_DOUBLE_EDGE_FIELD(reg) REG_FIELD(reg, 24, 31)
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/**
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* Dedicated style retime Configuration register
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* each register is dedicated per pin.
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*/
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#define RT_D_CFGS_PER_BANK 8
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#define RT_D_CFG_CLK_SHIFT 0
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#define RT_D_CFG_CLK_MASK (0x3 << 0)
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#define RT_D_CFG_CLKNOTDATA_SHIFT 2
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#define RT_D_CFG_CLKNOTDATA_MASK BIT(2)
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#define RT_D_CFG_DELAY_SHIFT 3
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#define RT_D_CFG_DELAY_MASK (0xf << 3)
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#define RT_D_CFG_DELAY_INNOTOUT_SHIFT 7
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#define RT_D_CFG_DELAY_INNOTOUT_MASK BIT(7)
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#define RT_D_CFG_DOUBLE_EDGE_SHIFT 8
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#define RT_D_CFG_DOUBLE_EDGE_MASK BIT(8)
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#define RT_D_CFG_INVERTCLK_SHIFT 9
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#define RT_D_CFG_INVERTCLK_MASK BIT(9)
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#define RT_D_CFG_RETIME_SHIFT 10
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#define RT_D_CFG_RETIME_MASK BIT(10)
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/*
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* Pinconf is represented in an opaque unsigned long variable.
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* Below is the bit allocation details for each possible configuration.
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* All the bit fields can be encapsulated into four variables
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* (direction, retime-type, retime-clk, retime-delay)
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*
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* +----------------+
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*[31:28]| reserved-3 |
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* +----------------+-------------
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*[27] | oe | |
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* +----------------+ v
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*[26] | pu | [Direction ]
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* +----------------+ ^
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*[25] | od | |
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* +----------------+-------------
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*[24] | reserved-2 |
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* +----------------+-------------
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*[23] | retime | |
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* +----------------+ |
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*[22] | retime-invclk | |
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* +----------------+ v
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*[21] |retime-clknotdat| [Retime-type ]
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* +----------------+ ^
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*[20] | retime-de | |
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* +----------------+-------------
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*[19:18]| retime-clk |------>[Retime-Clk ]
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* +----------------+
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*[17:16]| reserved-1 |
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* +----------------+
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*[15..0]| retime-delay |------>[Retime Delay]
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* +----------------+
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*/
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#define ST_PINCONF_UNPACK(conf, param)\
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((conf >> ST_PINCONF_ ##param ##_SHIFT) \
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& ST_PINCONF_ ##param ##_MASK)
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#define ST_PINCONF_PACK(conf, val, param) (conf |=\
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((val & ST_PINCONF_ ##param ##_MASK) << \
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ST_PINCONF_ ##param ##_SHIFT))
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/* Output enable */
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#define ST_PINCONF_OE_MASK 0x1
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#define ST_PINCONF_OE_SHIFT 27
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#define ST_PINCONF_OE BIT(27)
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#define ST_PINCONF_UNPACK_OE(conf) ST_PINCONF_UNPACK(conf, OE)
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#define ST_PINCONF_PACK_OE(conf) ST_PINCONF_PACK(conf, 1, OE)
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/* Pull Up */
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#define ST_PINCONF_PU_MASK 0x1
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#define ST_PINCONF_PU_SHIFT 26
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#define ST_PINCONF_PU BIT(26)
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#define ST_PINCONF_UNPACK_PU(conf) ST_PINCONF_UNPACK(conf, PU)
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#define ST_PINCONF_PACK_PU(conf) ST_PINCONF_PACK(conf, 1, PU)
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/* Open Drain */
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#define ST_PINCONF_OD_MASK 0x1
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#define ST_PINCONF_OD_SHIFT 25
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#define ST_PINCONF_OD BIT(25)
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#define ST_PINCONF_UNPACK_OD(conf) ST_PINCONF_UNPACK(conf, OD)
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#define ST_PINCONF_PACK_OD(conf) ST_PINCONF_PACK(conf, 1, OD)
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#define ST_PINCONF_RT_MASK 0x1
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#define ST_PINCONF_RT_SHIFT 23
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#define ST_PINCONF_RT BIT(23)
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#define ST_PINCONF_UNPACK_RT(conf) ST_PINCONF_UNPACK(conf, RT)
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#define ST_PINCONF_PACK_RT(conf) ST_PINCONF_PACK(conf, 1, RT)
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#define ST_PINCONF_RT_INVERTCLK_MASK 0x1
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#define ST_PINCONF_RT_INVERTCLK_SHIFT 22
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#define ST_PINCONF_RT_INVERTCLK BIT(22)
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#define ST_PINCONF_UNPACK_RT_INVERTCLK(conf) \
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ST_PINCONF_UNPACK(conf, RT_INVERTCLK)
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#define ST_PINCONF_PACK_RT_INVERTCLK(conf) \
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ST_PINCONF_PACK(conf, 1, RT_INVERTCLK)
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#define ST_PINCONF_RT_CLKNOTDATA_MASK 0x1
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#define ST_PINCONF_RT_CLKNOTDATA_SHIFT 21
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#define ST_PINCONF_RT_CLKNOTDATA BIT(21)
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#define ST_PINCONF_UNPACK_RT_CLKNOTDATA(conf) \
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ST_PINCONF_UNPACK(conf, RT_CLKNOTDATA)
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#define ST_PINCONF_PACK_RT_CLKNOTDATA(conf) \
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ST_PINCONF_PACK(conf, 1, RT_CLKNOTDATA)
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#define ST_PINCONF_RT_DOUBLE_EDGE_MASK 0x1
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#define ST_PINCONF_RT_DOUBLE_EDGE_SHIFT 20
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#define ST_PINCONF_RT_DOUBLE_EDGE BIT(20)
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#define ST_PINCONF_UNPACK_RT_DOUBLE_EDGE(conf) \
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ST_PINCONF_UNPACK(conf, RT_DOUBLE_EDGE)
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#define ST_PINCONF_PACK_RT_DOUBLE_EDGE(conf) \
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ST_PINCONF_PACK(conf, 1, RT_DOUBLE_EDGE)
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#define ST_PINCONF_RT_CLK_MASK 0x3
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#define ST_PINCONF_RT_CLK_SHIFT 18
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#define ST_PINCONF_RT_CLK BIT(18)
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#define ST_PINCONF_UNPACK_RT_CLK(conf) ST_PINCONF_UNPACK(conf, RT_CLK)
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#define ST_PINCONF_PACK_RT_CLK(conf, val) ST_PINCONF_PACK(conf, val, RT_CLK)
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/* RETIME_DELAY in Pico Secs */
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#define ST_PINCONF_RT_DELAY_MASK 0xffff
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#define ST_PINCONF_RT_DELAY_SHIFT 0
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#define ST_PINCONF_UNPACK_RT_DELAY(conf) ST_PINCONF_UNPACK(conf, RT_DELAY)
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#define ST_PINCONF_PACK_RT_DELAY(conf, val) \
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ST_PINCONF_PACK(conf, val, RT_DELAY)
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#define ST_GPIO_PINS_PER_BANK (8)
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#define OF_GPIO_ARGS_MIN (4)
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#define OF_RT_ARGS_MIN (2)
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#define gpio_range_to_bank(chip) \
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container_of(chip, struct st_gpio_bank, range)
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#define gpio_chip_to_bank(chip) \
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container_of(chip, struct st_gpio_bank, gpio_chip)
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enum st_retime_style {
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st_retime_style_none,
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st_retime_style_packed,
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st_retime_style_dedicated,
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};
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struct st_retime_dedicated {
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struct regmap_field *rt[ST_GPIO_PINS_PER_BANK];
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};
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struct st_retime_packed {
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struct regmap_field *clk1notclk0;
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struct regmap_field *delay_0;
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struct regmap_field *delay_1;
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struct regmap_field *invertclk;
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struct regmap_field *retime;
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struct regmap_field *clknotdata;
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struct regmap_field *double_edge;
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};
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struct st_pio_control {
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u32 rt_pin_mask;
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struct regmap_field *alt, *oe, *pu, *od;
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/* retiming */
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union {
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struct st_retime_packed rt_p;
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struct st_retime_dedicated rt_d;
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} rt;
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};
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struct st_pctl_data {
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enum st_retime_style rt_style;
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unsigned int *input_delays;
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int ninput_delays;
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unsigned int *output_delays;
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int noutput_delays;
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/* register offset information */
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int alt, oe, pu, od, rt;
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};
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struct st_pinconf {
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int pin;
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const char *name;
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unsigned long config;
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int altfunc;
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};
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struct st_pmx_func {
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const char *name;
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const char **groups;
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unsigned ngroups;
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};
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struct st_pctl_group {
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const char *name;
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unsigned int *pins;
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unsigned npins;
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struct st_pinconf *pin_conf;
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};
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struct st_gpio_bank {
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struct gpio_chip gpio_chip;
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struct pinctrl_gpio_range range;
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void __iomem *base;
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struct st_pio_control pc;
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};
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struct st_pinctrl {
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struct device *dev;
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struct pinctrl_dev *pctl;
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struct st_gpio_bank *banks;
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int nbanks;
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struct st_pmx_func *functions;
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int nfunctions;
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struct st_pctl_group *groups;
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int ngroups;
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struct regmap *regmap;
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const struct st_pctl_data *data;
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};
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/* SOC specific data */
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/* STiH415 data */
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static unsigned int stih415_input_delays[] = {0, 500, 1000, 1500};
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static unsigned int stih415_output_delays[] = {0, 1000, 2000, 3000};
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#define STIH415_PCTRL_COMMON_DATA \
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.rt_style = st_retime_style_packed, \
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.input_delays = stih415_input_delays, \
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.ninput_delays = 4, \
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.output_delays = stih415_output_delays, \
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.noutput_delays = 4
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static const struct st_pctl_data stih415_sbc_data = {
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STIH415_PCTRL_COMMON_DATA,
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.alt = 0, .oe = 5, .pu = 7, .od = 9, .rt = 16,
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};
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static const struct st_pctl_data stih415_front_data = {
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STIH415_PCTRL_COMMON_DATA,
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.alt = 0, .oe = 8, .pu = 10, .od = 12, .rt = 16,
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};
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static const struct st_pctl_data stih415_rear_data = {
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STIH415_PCTRL_COMMON_DATA,
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.alt = 0, .oe = 6, .pu = 8, .od = 10, .rt = 38,
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};
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static const struct st_pctl_data stih415_left_data = {
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STIH415_PCTRL_COMMON_DATA,
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.alt = 0, .oe = 3, .pu = 4, .od = 5, .rt = 6,
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};
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static const struct st_pctl_data stih415_right_data = {
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STIH415_PCTRL_COMMON_DATA,
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.alt = 0, .oe = 5, .pu = 7, .od = 9, .rt = 11,
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};
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/* STiH416 data */
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static unsigned int stih416_delays[] = {0, 300, 500, 750, 1000, 1250, 1500,
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1750, 2000, 2250, 2500, 2750, 3000, 3250 };
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static const struct st_pctl_data stih416_data = {
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.rt_style = st_retime_style_dedicated,
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.input_delays = stih416_delays,
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.ninput_delays = 14,
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.output_delays = stih416_delays,
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.noutput_delays = 14,
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.alt = 0, .oe = 40, .pu = 50, .od = 60, .rt = 100,
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};
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/* Low level functions.. */
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static inline int st_gpio_bank(int gpio)
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{
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return gpio/ST_GPIO_PINS_PER_BANK;
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}
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static inline int st_gpio_pin(int gpio)
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{
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return gpio%ST_GPIO_PINS_PER_BANK;
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}
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static void st_pinconf_set_config(struct st_pio_control *pc,
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int pin, unsigned long config)
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{
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struct regmap_field *output_enable = pc->oe;
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struct regmap_field *pull_up = pc->pu;
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struct regmap_field *open_drain = pc->od;
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unsigned int oe_value, pu_value, od_value;
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unsigned long mask = BIT(pin);
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regmap_field_read(output_enable, &oe_value);
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regmap_field_read(pull_up, &pu_value);
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regmap_field_read(open_drain, &od_value);
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/* Clear old values */
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oe_value &= ~mask;
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pu_value &= ~mask;
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od_value &= ~mask;
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if (config & ST_PINCONF_OE)
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oe_value |= mask;
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if (config & ST_PINCONF_PU)
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pu_value |= mask;
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if (config & ST_PINCONF_OD)
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od_value |= mask;
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regmap_field_write(output_enable, oe_value);
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regmap_field_write(pull_up, pu_value);
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regmap_field_write(open_drain, od_value);
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}
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static void st_pctl_set_function(struct st_pio_control *pc,
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int pin_id, int function)
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{
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struct regmap_field *alt = pc->alt;
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unsigned int val;
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int pin = st_gpio_pin(pin_id);
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int offset = pin * 4;
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regmap_field_read(alt, &val);
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val &= ~(0xf << offset);
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val |= function << offset;
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regmap_field_write(alt, val);
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}
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static unsigned long st_pinconf_delay_to_bit(unsigned int delay,
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const struct st_pctl_data *data, unsigned long config)
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{
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unsigned int *delay_times;
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int num_delay_times, i, closest_index = -1;
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unsigned int closest_divergence = UINT_MAX;
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if (ST_PINCONF_UNPACK_OE(config)) {
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delay_times = data->output_delays;
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num_delay_times = data->noutput_delays;
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} else {
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delay_times = data->input_delays;
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num_delay_times = data->ninput_delays;
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}
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for (i = 0; i < num_delay_times; i++) {
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unsigned int divergence = abs(delay - delay_times[i]);
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if (divergence == 0)
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return i;
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if (divergence < closest_divergence) {
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closest_divergence = divergence;
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closest_index = i;
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}
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}
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pr_warn("Attempt to set delay %d, closest available %d\n",
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delay, delay_times[closest_index]);
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return closest_index;
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}
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static unsigned long st_pinconf_bit_to_delay(unsigned int index,
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const struct st_pctl_data *data, unsigned long output)
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{
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unsigned int *delay_times;
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int num_delay_times;
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if (output) {
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delay_times = data->output_delays;
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num_delay_times = data->noutput_delays;
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} else {
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delay_times = data->input_delays;
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num_delay_times = data->ninput_delays;
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}
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if (index < num_delay_times) {
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return delay_times[index];
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} else {
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pr_warn("Delay not found in/out delay list\n");
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return 0;
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}
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}
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static void st_regmap_field_bit_set_clear_pin(struct regmap_field *field,
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int enable, int pin)
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{
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unsigned int val = 0;
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regmap_field_read(field, &val);
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if (enable)
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val |= BIT(pin);
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else
|
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val &= ~BIT(pin);
|
|
regmap_field_write(field, val);
|
|
}
|
|
|
|
static void st_pinconf_set_retime_packed(struct st_pinctrl *info,
|
|
struct st_pio_control *pc, unsigned long config, int pin)
|
|
{
|
|
const struct st_pctl_data *data = info->data;
|
|
struct st_retime_packed *rt_p = &pc->rt.rt_p;
|
|
unsigned int delay;
|
|
|
|
st_regmap_field_bit_set_clear_pin(rt_p->clk1notclk0,
|
|
ST_PINCONF_UNPACK_RT_CLK(config), pin);
|
|
|
|
st_regmap_field_bit_set_clear_pin(rt_p->clknotdata,
|
|
ST_PINCONF_UNPACK_RT_CLKNOTDATA(config), pin);
|
|
|
|
st_regmap_field_bit_set_clear_pin(rt_p->double_edge,
|
|
ST_PINCONF_UNPACK_RT_DOUBLE_EDGE(config), pin);
|
|
|
|
st_regmap_field_bit_set_clear_pin(rt_p->invertclk,
|
|
ST_PINCONF_UNPACK_RT_INVERTCLK(config), pin);
|
|
|
|
st_regmap_field_bit_set_clear_pin(rt_p->retime,
|
|
ST_PINCONF_UNPACK_RT(config), pin);
|
|
|
|
delay = st_pinconf_delay_to_bit(ST_PINCONF_UNPACK_RT_DELAY(config),
|
|
data, config);
|
|
/* 2 bit delay, lsb */
|
|
st_regmap_field_bit_set_clear_pin(rt_p->delay_0, delay & 0x1, pin);
|
|
/* 2 bit delay, msb */
|
|
st_regmap_field_bit_set_clear_pin(rt_p->delay_1, delay & 0x2, pin);
|
|
|
|
}
|
|
|
|
static void st_pinconf_set_retime_dedicated(struct st_pinctrl *info,
|
|
struct st_pio_control *pc, unsigned long config, int pin)
|
|
{
|
|
int input = ST_PINCONF_UNPACK_OE(config) ? 0 : 1;
|
|
int clk = ST_PINCONF_UNPACK_RT_CLK(config);
|
|
int clknotdata = ST_PINCONF_UNPACK_RT_CLKNOTDATA(config);
|
|
int double_edge = ST_PINCONF_UNPACK_RT_DOUBLE_EDGE(config);
|
|
int invertclk = ST_PINCONF_UNPACK_RT_INVERTCLK(config);
|
|
int retime = ST_PINCONF_UNPACK_RT(config);
|
|
|
|
unsigned long delay = st_pinconf_delay_to_bit(
|
|
ST_PINCONF_UNPACK_RT_DELAY(config),
|
|
info->data, config);
|
|
struct st_retime_dedicated *rt_d = &pc->rt.rt_d;
|
|
|
|
unsigned long retime_config =
|
|
((clk) << RT_D_CFG_CLK_SHIFT) |
|
|
((delay) << RT_D_CFG_DELAY_SHIFT) |
|
|
((input) << RT_D_CFG_DELAY_INNOTOUT_SHIFT) |
|
|
((retime) << RT_D_CFG_RETIME_SHIFT) |
|
|
((clknotdata) << RT_D_CFG_CLKNOTDATA_SHIFT) |
|
|
((invertclk) << RT_D_CFG_INVERTCLK_SHIFT) |
|
|
((double_edge) << RT_D_CFG_DOUBLE_EDGE_SHIFT);
|
|
|
|
regmap_field_write(rt_d->rt[pin], retime_config);
|
|
}
|
|
|
|
static void st_pinconf_get_direction(struct st_pio_control *pc,
|
|
int pin, unsigned long *config)
|
|
{
|
|
unsigned int oe_value, pu_value, od_value;
|
|
|
|
regmap_field_read(pc->oe, &oe_value);
|
|
regmap_field_read(pc->pu, &pu_value);
|
|
regmap_field_read(pc->od, &od_value);
|
|
|
|
if (oe_value & BIT(pin))
|
|
ST_PINCONF_PACK_OE(*config);
|
|
if (pu_value & BIT(pin))
|
|
ST_PINCONF_PACK_PU(*config);
|
|
if (od_value & BIT(pin))
|
|
ST_PINCONF_PACK_OD(*config);
|
|
|
|
}
|
|
|
|
static int st_pinconf_get_retime_packed(struct st_pinctrl *info,
|
|
struct st_pio_control *pc, int pin, unsigned long *config)
|
|
{
|
|
const struct st_pctl_data *data = info->data;
|
|
struct st_retime_packed *rt_p = &pc->rt.rt_p;
|
|
unsigned int delay_bits, delay, delay0, delay1, val;
|
|
int output = ST_PINCONF_UNPACK_OE(*config);
|
|
|
|
if (!regmap_field_read(rt_p->retime, &val) && (val & BIT(pin)))
|
|
ST_PINCONF_PACK_RT(*config);
|
|
|
|
if (!regmap_field_read(rt_p->clk1notclk0, &val) && (val & BIT(pin)))
|
|
ST_PINCONF_PACK_RT_CLK(*config, 1);
|
|
|
|
if (!regmap_field_read(rt_p->clknotdata, &val) && (val & BIT(pin)))
|
|
ST_PINCONF_PACK_RT_CLKNOTDATA(*config);
|
|
|
|
if (!regmap_field_read(rt_p->double_edge, &val) && (val & BIT(pin)))
|
|
ST_PINCONF_PACK_RT_DOUBLE_EDGE(*config);
|
|
|
|
if (!regmap_field_read(rt_p->invertclk, &val) && (val & BIT(pin)))
|
|
ST_PINCONF_PACK_RT_INVERTCLK(*config);
|
|
|
|
regmap_field_read(rt_p->delay_0, &delay0);
|
|
regmap_field_read(rt_p->delay_1, &delay1);
|
|
delay_bits = (((delay1 & BIT(pin)) ? 1 : 0) << 1) |
|
|
(((delay0 & BIT(pin)) ? 1 : 0));
|
|
delay = st_pinconf_bit_to_delay(delay_bits, data, output);
|
|
ST_PINCONF_PACK_RT_DELAY(*config, delay);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int st_pinconf_get_retime_dedicated(struct st_pinctrl *info,
|
|
struct st_pio_control *pc, int pin, unsigned long *config)
|
|
{
|
|
unsigned int value;
|
|
unsigned long delay_bits, delay, rt_clk;
|
|
int output = ST_PINCONF_UNPACK_OE(*config);
|
|
struct st_retime_dedicated *rt_d = &pc->rt.rt_d;
|
|
|
|
regmap_field_read(rt_d->rt[pin], &value);
|
|
|
|
rt_clk = (value & RT_D_CFG_CLK_MASK) >> RT_D_CFG_CLK_SHIFT;
|
|
ST_PINCONF_PACK_RT_CLK(*config, rt_clk);
|
|
|
|
delay_bits = (value & RT_D_CFG_DELAY_MASK) >> RT_D_CFG_DELAY_SHIFT;
|
|
delay = st_pinconf_bit_to_delay(delay_bits, info->data, output);
|
|
ST_PINCONF_PACK_RT_DELAY(*config, delay);
|
|
|
|
if (value & RT_D_CFG_CLKNOTDATA_MASK)
|
|
ST_PINCONF_PACK_RT_CLKNOTDATA(*config);
|
|
|
|
if (value & RT_D_CFG_DOUBLE_EDGE_MASK)
|
|
ST_PINCONF_PACK_RT_DOUBLE_EDGE(*config);
|
|
|
|
if (value & RT_D_CFG_INVERTCLK_MASK)
|
|
ST_PINCONF_PACK_RT_INVERTCLK(*config);
|
|
|
|
if (value & RT_D_CFG_RETIME_MASK)
|
|
ST_PINCONF_PACK_RT(*config);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* GPIO related functions */
|
|
|
|
static inline void __st_gpio_set(struct st_gpio_bank *bank,
|
|
unsigned offset, int value)
|
|
{
|
|
if (value)
|
|
writel(BIT(offset), bank->base + REG_PIO_SET_POUT);
|
|
else
|
|
writel(BIT(offset), bank->base + REG_PIO_CLR_POUT);
|
|
}
|
|
|
|
static void st_gpio_direction(struct st_gpio_bank *bank,
|
|
unsigned int gpio, unsigned int direction)
|
|
{
|
|
int offset = st_gpio_pin(gpio);
|
|
int i = 0;
|
|
/**
|
|
* There are three configuration registers (PIOn_PC0, PIOn_PC1
|
|
* and PIOn_PC2) for each port. These are used to configure the
|
|
* PIO port pins. Each pin can be configured as an input, output,
|
|
* bidirectional, or alternative function pin. Three bits, one bit
|
|
* from each of the three registers, configure the corresponding bit of
|
|
* the port. Valid bit settings is:
|
|
*
|
|
* PC2 PC1 PC0 Direction.
|
|
* 0 0 0 [Input Weak pull-up]
|
|
* 0 0 or 1 1 [Bidirection]
|
|
* 0 1 0 [Output]
|
|
* 1 0 0 [Input]
|
|
*
|
|
* PIOn_SET_PC and PIOn_CLR_PC registers are used to set and clear bits
|
|
* individually.
|
|
*/
|
|
for (i = 0; i <= 2; i++) {
|
|
if (direction & BIT(i))
|
|
writel(BIT(offset), bank->base + REG_PIO_SET_PC(i));
|
|
else
|
|
writel(BIT(offset), bank->base + REG_PIO_CLR_PC(i));
|
|
}
|
|
}
|
|
|
|
static int st_gpio_request(struct gpio_chip *chip, unsigned offset)
|
|
{
|
|
return pinctrl_request_gpio(chip->base + offset);
|
|
}
|
|
|
|
static void st_gpio_free(struct gpio_chip *chip, unsigned offset)
|
|
{
|
|
pinctrl_free_gpio(chip->base + offset);
|
|
}
|
|
|
|
static int st_gpio_get(struct gpio_chip *chip, unsigned offset)
|
|
{
|
|
struct st_gpio_bank *bank = gpio_chip_to_bank(chip);
|
|
|
|
return !!(readl(bank->base + REG_PIO_PIN) & BIT(offset));
|
|
}
|
|
|
|
static void st_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
|
|
{
|
|
struct st_gpio_bank *bank = gpio_chip_to_bank(chip);
|
|
__st_gpio_set(bank, offset, value);
|
|
}
|
|
|
|
static int st_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
|
|
{
|
|
pinctrl_gpio_direction_input(chip->base + offset);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int st_gpio_direction_output(struct gpio_chip *chip,
|
|
unsigned offset, int value)
|
|
{
|
|
struct st_gpio_bank *bank = gpio_chip_to_bank(chip);
|
|
|
|
__st_gpio_set(bank, offset, value);
|
|
pinctrl_gpio_direction_output(chip->base + offset);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int st_gpio_xlate(struct gpio_chip *gc,
|
|
const struct of_phandle_args *gpiospec, u32 *flags)
|
|
{
|
|
if (WARN_ON(gc->of_gpio_n_cells < 1))
|
|
return -EINVAL;
|
|
|
|
if (WARN_ON(gpiospec->args_count < gc->of_gpio_n_cells))
|
|
return -EINVAL;
|
|
|
|
if (gpiospec->args[0] > gc->ngpio)
|
|
return -EINVAL;
|
|
|
|
return gpiospec->args[0];
|
|
}
|
|
|
|
/* Pinctrl Groups */
|
|
static int st_pctl_get_groups_count(struct pinctrl_dev *pctldev)
|
|
{
|
|
struct st_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
return info->ngroups;
|
|
}
|
|
|
|
static const char *st_pctl_get_group_name(struct pinctrl_dev *pctldev,
|
|
unsigned selector)
|
|
{
|
|
struct st_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
return info->groups[selector].name;
|
|
}
|
|
|
|
static int st_pctl_get_group_pins(struct pinctrl_dev *pctldev,
|
|
unsigned selector, const unsigned **pins, unsigned *npins)
|
|
{
|
|
struct st_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
if (selector >= info->ngroups)
|
|
return -EINVAL;
|
|
|
|
*pins = info->groups[selector].pins;
|
|
*npins = info->groups[selector].npins;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const inline struct st_pctl_group *st_pctl_find_group_by_name(
|
|
const struct st_pinctrl *info, const char *name)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < info->ngroups; i++) {
|
|
if (!strcmp(info->groups[i].name, name))
|
|
return &info->groups[i];
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int st_pctl_dt_node_to_map(struct pinctrl_dev *pctldev,
|
|
struct device_node *np, struct pinctrl_map **map, unsigned *num_maps)
|
|
{
|
|
struct st_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
|
|
const struct st_pctl_group *grp;
|
|
struct pinctrl_map *new_map;
|
|
struct device_node *parent;
|
|
int map_num, i;
|
|
|
|
grp = st_pctl_find_group_by_name(info, np->name);
|
|
if (!grp) {
|
|
dev_err(info->dev, "unable to find group for node %s\n",
|
|
np->name);
|
|
return -EINVAL;
|
|
}
|
|
|
|
map_num = grp->npins + 1;
|
|
new_map = devm_kzalloc(pctldev->dev,
|
|
sizeof(*new_map) * map_num, GFP_KERNEL);
|
|
if (!new_map)
|
|
return -ENOMEM;
|
|
|
|
parent = of_get_parent(np);
|
|
if (!parent) {
|
|
devm_kfree(pctldev->dev, new_map);
|
|
return -EINVAL;
|
|
}
|
|
|
|
*map = new_map;
|
|
*num_maps = map_num;
|
|
new_map[0].type = PIN_MAP_TYPE_MUX_GROUP;
|
|
new_map[0].data.mux.function = parent->name;
|
|
new_map[0].data.mux.group = np->name;
|
|
of_node_put(parent);
|
|
|
|
/* create config map per pin */
|
|
new_map++;
|
|
for (i = 0; i < grp->npins; i++) {
|
|
new_map[i].type = PIN_MAP_TYPE_CONFIGS_PIN;
|
|
new_map[i].data.configs.group_or_pin =
|
|
pin_get_name(pctldev, grp->pins[i]);
|
|
new_map[i].data.configs.configs = &grp->pin_conf[i].config;
|
|
new_map[i].data.configs.num_configs = 1;
|
|
}
|
|
dev_info(pctldev->dev, "maps: function %s group %s num %d\n",
|
|
(*map)->data.mux.function, grp->name, map_num);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void st_pctl_dt_free_map(struct pinctrl_dev *pctldev,
|
|
struct pinctrl_map *map, unsigned num_maps)
|
|
{
|
|
}
|
|
|
|
static struct pinctrl_ops st_pctlops = {
|
|
.get_groups_count = st_pctl_get_groups_count,
|
|
.get_group_pins = st_pctl_get_group_pins,
|
|
.get_group_name = st_pctl_get_group_name,
|
|
.dt_node_to_map = st_pctl_dt_node_to_map,
|
|
.dt_free_map = st_pctl_dt_free_map,
|
|
};
|
|
|
|
/* Pinmux */
|
|
static int st_pmx_get_funcs_count(struct pinctrl_dev *pctldev)
|
|
{
|
|
struct st_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
return info->nfunctions;
|
|
}
|
|
|
|
static const char *st_pmx_get_fname(struct pinctrl_dev *pctldev,
|
|
unsigned selector)
|
|
{
|
|
struct st_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
return info->functions[selector].name;
|
|
}
|
|
|
|
static int st_pmx_get_groups(struct pinctrl_dev *pctldev,
|
|
unsigned selector, const char * const **grps, unsigned * const ngrps)
|
|
{
|
|
struct st_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
|
|
*grps = info->functions[selector].groups;
|
|
*ngrps = info->functions[selector].ngroups;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct st_pio_control *st_get_pio_control(
|
|
struct pinctrl_dev *pctldev, int pin)
|
|
{
|
|
struct pinctrl_gpio_range *range =
|
|
pinctrl_find_gpio_range_from_pin(pctldev, pin);
|
|
struct st_gpio_bank *bank = gpio_range_to_bank(range);
|
|
|
|
return &bank->pc;
|
|
}
|
|
|
|
static int st_pmx_enable(struct pinctrl_dev *pctldev, unsigned fselector,
|
|
unsigned group)
|
|
{
|
|
struct st_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
|
|
struct st_pinconf *conf = info->groups[group].pin_conf;
|
|
struct st_pio_control *pc;
|
|
int i;
|
|
|
|
for (i = 0; i < info->groups[group].npins; i++) {
|
|
pc = st_get_pio_control(pctldev, conf[i].pin);
|
|
st_pctl_set_function(pc, conf[i].pin, conf[i].altfunc);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void st_pmx_disable(struct pinctrl_dev *pctldev, unsigned selector,
|
|
unsigned group)
|
|
{
|
|
}
|
|
|
|
static int st_pmx_set_gpio_direction(struct pinctrl_dev *pctldev,
|
|
struct pinctrl_gpio_range *range, unsigned gpio,
|
|
bool input)
|
|
{
|
|
struct st_gpio_bank *bank = gpio_range_to_bank(range);
|
|
/*
|
|
* When a PIO bank is used in its primary function mode (altfunc = 0)
|
|
* Output Enable (OE), Open Drain(OD), and Pull Up (PU)
|
|
* for the primary PIO functions are driven by the related PIO block
|
|
*/
|
|
st_pctl_set_function(&bank->pc, gpio, 0);
|
|
st_gpio_direction(bank, gpio, input ?
|
|
ST_GPIO_DIRECTION_IN : ST_GPIO_DIRECTION_OUT);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct pinmux_ops st_pmxops = {
|
|
.get_functions_count = st_pmx_get_funcs_count,
|
|
.get_function_name = st_pmx_get_fname,
|
|
.get_function_groups = st_pmx_get_groups,
|
|
.enable = st_pmx_enable,
|
|
.disable = st_pmx_disable,
|
|
.gpio_set_direction = st_pmx_set_gpio_direction,
|
|
};
|
|
|
|
/* Pinconf */
|
|
static void st_pinconf_get_retime(struct st_pinctrl *info,
|
|
struct st_pio_control *pc, int pin, unsigned long *config)
|
|
{
|
|
if (info->data->rt_style == st_retime_style_packed)
|
|
st_pinconf_get_retime_packed(info, pc, pin, config);
|
|
else if (info->data->rt_style == st_retime_style_dedicated)
|
|
if ((BIT(pin) & pc->rt_pin_mask))
|
|
st_pinconf_get_retime_dedicated(info, pc,
|
|
pin, config);
|
|
}
|
|
|
|
static void st_pinconf_set_retime(struct st_pinctrl *info,
|
|
struct st_pio_control *pc, int pin, unsigned long config)
|
|
{
|
|
if (info->data->rt_style == st_retime_style_packed)
|
|
st_pinconf_set_retime_packed(info, pc, config, pin);
|
|
else if (info->data->rt_style == st_retime_style_dedicated)
|
|
if ((BIT(pin) & pc->rt_pin_mask))
|
|
st_pinconf_set_retime_dedicated(info, pc,
|
|
config, pin);
|
|
}
|
|
|
|
static int st_pinconf_set(struct pinctrl_dev *pctldev, unsigned pin_id,
|
|
unsigned long *configs, unsigned num_configs)
|
|
{
|
|
int pin = st_gpio_pin(pin_id);
|
|
struct st_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
|
|
struct st_pio_control *pc = st_get_pio_control(pctldev, pin_id);
|
|
int i;
|
|
|
|
for (i = 0; i < num_configs; i++) {
|
|
st_pinconf_set_config(pc, pin, configs[i]);
|
|
st_pinconf_set_retime(info, pc, pin, configs[i]);
|
|
} /* for each config */
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int st_pinconf_get(struct pinctrl_dev *pctldev,
|
|
unsigned pin_id, unsigned long *config)
|
|
{
|
|
int pin = st_gpio_pin(pin_id);
|
|
struct st_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
|
|
struct st_pio_control *pc = st_get_pio_control(pctldev, pin_id);
|
|
|
|
*config = 0;
|
|
st_pinconf_get_direction(pc, pin, config);
|
|
st_pinconf_get_retime(info, pc, pin, config);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void st_pinconf_dbg_show(struct pinctrl_dev *pctldev,
|
|
struct seq_file *s, unsigned pin_id)
|
|
{
|
|
unsigned long config;
|
|
st_pinconf_get(pctldev, pin_id, &config);
|
|
|
|
seq_printf(s, "[OE:%ld,PU:%ld,OD:%ld]\n"
|
|
"\t\t[retime:%ld,invclk:%ld,clknotdat:%ld,"
|
|
"de:%ld,rt-clk:%ld,rt-delay:%ld]",
|
|
ST_PINCONF_UNPACK_OE(config),
|
|
ST_PINCONF_UNPACK_PU(config),
|
|
ST_PINCONF_UNPACK_OD(config),
|
|
ST_PINCONF_UNPACK_RT(config),
|
|
ST_PINCONF_UNPACK_RT_INVERTCLK(config),
|
|
ST_PINCONF_UNPACK_RT_CLKNOTDATA(config),
|
|
ST_PINCONF_UNPACK_RT_DOUBLE_EDGE(config),
|
|
ST_PINCONF_UNPACK_RT_CLK(config),
|
|
ST_PINCONF_UNPACK_RT_DELAY(config));
|
|
}
|
|
|
|
static struct pinconf_ops st_confops = {
|
|
.pin_config_get = st_pinconf_get,
|
|
.pin_config_set = st_pinconf_set,
|
|
.pin_config_dbg_show = st_pinconf_dbg_show,
|
|
};
|
|
|
|
static void st_pctl_dt_child_count(struct st_pinctrl *info,
|
|
struct device_node *np)
|
|
{
|
|
struct device_node *child;
|
|
for_each_child_of_node(np, child) {
|
|
if (of_property_read_bool(child, "gpio-controller")) {
|
|
info->nbanks++;
|
|
} else {
|
|
info->nfunctions++;
|
|
info->ngroups += of_get_child_count(child);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int st_pctl_dt_setup_retime_packed(struct st_pinctrl *info,
|
|
int bank, struct st_pio_control *pc)
|
|
{
|
|
struct device *dev = info->dev;
|
|
struct regmap *rm = info->regmap;
|
|
const struct st_pctl_data *data = info->data;
|
|
/* 2 registers per bank */
|
|
int reg = (data->rt + bank * RT_P_CFGS_PER_BANK) * 4;
|
|
struct st_retime_packed *rt_p = &pc->rt.rt_p;
|
|
/* cfg0 */
|
|
struct reg_field clk1notclk0 = RT_P_CFG0_CLK1NOTCLK0_FIELD(reg);
|
|
struct reg_field delay_0 = RT_P_CFG0_DELAY_0_FIELD(reg);
|
|
struct reg_field delay_1 = RT_P_CFG0_DELAY_1_FIELD(reg);
|
|
/* cfg1 */
|
|
struct reg_field invertclk = RT_P_CFG1_INVERTCLK_FIELD(reg + 4);
|
|
struct reg_field retime = RT_P_CFG1_RETIME_FIELD(reg + 4);
|
|
struct reg_field clknotdata = RT_P_CFG1_CLKNOTDATA_FIELD(reg + 4);
|
|
struct reg_field double_edge = RT_P_CFG1_DOUBLE_EDGE_FIELD(reg + 4);
|
|
|
|
rt_p->clk1notclk0 = devm_regmap_field_alloc(dev, rm, clk1notclk0);
|
|
rt_p->delay_0 = devm_regmap_field_alloc(dev, rm, delay_0);
|
|
rt_p->delay_1 = devm_regmap_field_alloc(dev, rm, delay_1);
|
|
rt_p->invertclk = devm_regmap_field_alloc(dev, rm, invertclk);
|
|
rt_p->retime = devm_regmap_field_alloc(dev, rm, retime);
|
|
rt_p->clknotdata = devm_regmap_field_alloc(dev, rm, clknotdata);
|
|
rt_p->double_edge = devm_regmap_field_alloc(dev, rm, double_edge);
|
|
|
|
if (IS_ERR(rt_p->clk1notclk0) || IS_ERR(rt_p->delay_0) ||
|
|
IS_ERR(rt_p->delay_1) || IS_ERR(rt_p->invertclk) ||
|
|
IS_ERR(rt_p->retime) || IS_ERR(rt_p->clknotdata) ||
|
|
IS_ERR(rt_p->double_edge))
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int st_pctl_dt_setup_retime_dedicated(struct st_pinctrl *info,
|
|
int bank, struct st_pio_control *pc)
|
|
{
|
|
struct device *dev = info->dev;
|
|
struct regmap *rm = info->regmap;
|
|
const struct st_pctl_data *data = info->data;
|
|
/* 8 registers per bank */
|
|
int reg_offset = (data->rt + bank * RT_D_CFGS_PER_BANK) * 4;
|
|
struct st_retime_dedicated *rt_d = &pc->rt.rt_d;
|
|
unsigned int j;
|
|
u32 pin_mask = pc->rt_pin_mask;
|
|
|
|
for (j = 0; j < RT_D_CFGS_PER_BANK; j++) {
|
|
if (BIT(j) & pin_mask) {
|
|
struct reg_field reg = REG_FIELD(reg_offset, 0, 31);
|
|
rt_d->rt[j] = devm_regmap_field_alloc(dev, rm, reg);
|
|
if (IS_ERR(rt_d->rt[j]))
|
|
return -EINVAL;
|
|
reg_offset += 4;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int st_pctl_dt_setup_retime(struct st_pinctrl *info,
|
|
int bank, struct st_pio_control *pc)
|
|
{
|
|
const struct st_pctl_data *data = info->data;
|
|
if (data->rt_style == st_retime_style_packed)
|
|
return st_pctl_dt_setup_retime_packed(info, bank, pc);
|
|
else if (data->rt_style == st_retime_style_dedicated)
|
|
return st_pctl_dt_setup_retime_dedicated(info, bank, pc);
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int st_parse_syscfgs(struct st_pinctrl *info,
|
|
int bank, struct device_node *np)
|
|
{
|
|
const struct st_pctl_data *data = info->data;
|
|
/**
|
|
* For a given shared register like OE/PU/OD, there are 8 bits per bank
|
|
* 0:7 belongs to bank0, 8:15 belongs to bank1 ...
|
|
* So each register is shared across 4 banks.
|
|
*/
|
|
int lsb = (bank%4) * ST_GPIO_PINS_PER_BANK;
|
|
int msb = lsb + ST_GPIO_PINS_PER_BANK - 1;
|
|
struct reg_field alt_reg = REG_FIELD((data->alt + bank) * 4, 0, 31);
|
|
struct reg_field oe_reg = REG_FIELD((data->oe + bank/4) * 4, lsb, msb);
|
|
struct reg_field pu_reg = REG_FIELD((data->pu + bank/4) * 4, lsb, msb);
|
|
struct reg_field od_reg = REG_FIELD((data->od + bank/4) * 4, lsb, msb);
|
|
struct st_pio_control *pc = &info->banks[bank].pc;
|
|
struct device *dev = info->dev;
|
|
struct regmap *regmap = info->regmap;
|
|
|
|
pc->alt = devm_regmap_field_alloc(dev, regmap, alt_reg);
|
|
pc->oe = devm_regmap_field_alloc(dev, regmap, oe_reg);
|
|
pc->pu = devm_regmap_field_alloc(dev, regmap, pu_reg);
|
|
pc->od = devm_regmap_field_alloc(dev, regmap, od_reg);
|
|
|
|
if (IS_ERR(pc->alt) || IS_ERR(pc->oe) ||
|
|
IS_ERR(pc->pu) || IS_ERR(pc->od))
|
|
return -EINVAL;
|
|
|
|
/* retime avaiable for all pins by default */
|
|
pc->rt_pin_mask = 0xff;
|
|
of_property_read_u32(np, "st,retime-pin-mask", &pc->rt_pin_mask);
|
|
st_pctl_dt_setup_retime(info, bank, pc);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Each pin is represented in of the below forms.
|
|
* <bank offset mux direction rt_type rt_delay rt_clk>
|
|
*/
|
|
static int st_pctl_dt_parse_groups(struct device_node *np,
|
|
struct st_pctl_group *grp, struct st_pinctrl *info, int idx)
|
|
{
|
|
/* bank pad direction val altfunction */
|
|
const __be32 *list;
|
|
struct property *pp;
|
|
struct st_pinconf *conf;
|
|
phandle phandle;
|
|
struct device_node *pins;
|
|
u32 pin;
|
|
int i = 0, npins = 0, nr_props;
|
|
|
|
pins = of_get_child_by_name(np, "st,pins");
|
|
if (!pins)
|
|
return -ENODATA;
|
|
|
|
for_each_property_of_node(pins, pp) {
|
|
/* Skip those we do not want to proceed */
|
|
if (!strcmp(pp->name, "name"))
|
|
continue;
|
|
|
|
if (pp && (pp->length/sizeof(__be32)) >= OF_GPIO_ARGS_MIN) {
|
|
npins++;
|
|
} else {
|
|
pr_warn("Invalid st,pins in %s node\n", np->name);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
grp->npins = npins;
|
|
grp->name = np->name;
|
|
grp->pins = devm_kzalloc(info->dev, npins * sizeof(u32), GFP_KERNEL);
|
|
grp->pin_conf = devm_kzalloc(info->dev,
|
|
npins * sizeof(*conf), GFP_KERNEL);
|
|
|
|
if (!grp->pins || !grp->pin_conf)
|
|
return -ENOMEM;
|
|
|
|
/* <bank offset mux direction rt_type rt_delay rt_clk> */
|
|
for_each_property_of_node(pins, pp) {
|
|
if (!strcmp(pp->name, "name"))
|
|
continue;
|
|
nr_props = pp->length/sizeof(u32);
|
|
list = pp->value;
|
|
conf = &grp->pin_conf[i];
|
|
|
|
/* bank & offset */
|
|
phandle = be32_to_cpup(list++);
|
|
pin = be32_to_cpup(list++);
|
|
conf->pin = of_get_named_gpio(pins, pp->name, 0);
|
|
conf->name = pp->name;
|
|
grp->pins[i] = conf->pin;
|
|
/* mux */
|
|
conf->altfunc = be32_to_cpup(list++);
|
|
conf->config = 0;
|
|
/* direction */
|
|
conf->config |= be32_to_cpup(list++);
|
|
/* rt_type rt_delay rt_clk */
|
|
if (nr_props >= OF_GPIO_ARGS_MIN + OF_RT_ARGS_MIN) {
|
|
/* rt_type */
|
|
conf->config |= be32_to_cpup(list++);
|
|
/* rt_delay */
|
|
conf->config |= be32_to_cpup(list++);
|
|
/* rt_clk */
|
|
if (nr_props > OF_GPIO_ARGS_MIN + OF_RT_ARGS_MIN)
|
|
conf->config |= be32_to_cpup(list++);
|
|
}
|
|
i++;
|
|
}
|
|
of_node_put(pins);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int st_pctl_parse_functions(struct device_node *np,
|
|
struct st_pinctrl *info, u32 index, int *grp_index)
|
|
{
|
|
struct device_node *child;
|
|
struct st_pmx_func *func;
|
|
struct st_pctl_group *grp;
|
|
int ret, i;
|
|
|
|
func = &info->functions[index];
|
|
func->name = np->name;
|
|
func->ngroups = of_get_child_count(np);
|
|
if (func->ngroups <= 0) {
|
|
dev_err(info->dev, "No groups defined\n");
|
|
return -EINVAL;
|
|
}
|
|
func->groups = devm_kzalloc(info->dev,
|
|
func->ngroups * sizeof(char *), GFP_KERNEL);
|
|
if (!func->groups)
|
|
return -ENOMEM;
|
|
|
|
i = 0;
|
|
for_each_child_of_node(np, child) {
|
|
func->groups[i] = child->name;
|
|
grp = &info->groups[*grp_index];
|
|
*grp_index += 1;
|
|
ret = st_pctl_dt_parse_groups(child, grp, info, i++);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
dev_info(info->dev, "Function[%d\t name:%s,\tgroups:%d]\n",
|
|
index, func->name, func->ngroups);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct gpio_chip st_gpio_template = {
|
|
.request = st_gpio_request,
|
|
.free = st_gpio_free,
|
|
.get = st_gpio_get,
|
|
.set = st_gpio_set,
|
|
.direction_input = st_gpio_direction_input,
|
|
.direction_output = st_gpio_direction_output,
|
|
.ngpio = ST_GPIO_PINS_PER_BANK,
|
|
.of_gpio_n_cells = 1,
|
|
.of_xlate = st_gpio_xlate,
|
|
};
|
|
|
|
static int st_gpiolib_register_bank(struct st_pinctrl *info,
|
|
int bank_nr, struct device_node *np)
|
|
{
|
|
struct st_gpio_bank *bank = &info->banks[bank_nr];
|
|
struct pinctrl_gpio_range *range = &bank->range;
|
|
struct device *dev = info->dev;
|
|
int bank_num = of_alias_get_id(np, "gpio");
|
|
struct resource res;
|
|
int err;
|
|
|
|
if (of_address_to_resource(np, 0, &res))
|
|
return -ENODEV;
|
|
|
|
bank->base = devm_ioremap_resource(dev, &res);
|
|
if (IS_ERR(bank->base))
|
|
return PTR_ERR(bank->base);
|
|
|
|
bank->gpio_chip = st_gpio_template;
|
|
bank->gpio_chip.base = bank_num * ST_GPIO_PINS_PER_BANK;
|
|
bank->gpio_chip.ngpio = ST_GPIO_PINS_PER_BANK;
|
|
bank->gpio_chip.of_node = np;
|
|
|
|
of_property_read_string(np, "st,bank-name", &range->name);
|
|
bank->gpio_chip.label = range->name;
|
|
|
|
range->id = bank_num;
|
|
range->pin_base = range->base = range->id * ST_GPIO_PINS_PER_BANK;
|
|
range->npins = bank->gpio_chip.ngpio;
|
|
range->gc = &bank->gpio_chip;
|
|
err = gpiochip_add(&bank->gpio_chip);
|
|
if (err) {
|
|
dev_err(dev, "Failed to add gpiochip(%d)!\n", bank_num);
|
|
return err;
|
|
}
|
|
dev_info(dev, "%s bank added.\n", range->name);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct of_device_id st_pctl_of_match[] = {
|
|
{ .compatible = "st,stih415-sbc-pinctrl", .data = &stih415_sbc_data },
|
|
{ .compatible = "st,stih415-rear-pinctrl", .data = &stih415_rear_data },
|
|
{ .compatible = "st,stih415-left-pinctrl", .data = &stih415_left_data },
|
|
{ .compatible = "st,stih415-right-pinctrl",
|
|
.data = &stih415_right_data },
|
|
{ .compatible = "st,stih415-front-pinctrl",
|
|
.data = &stih415_front_data },
|
|
{ .compatible = "st,stih416-sbc-pinctrl", .data = &stih416_data},
|
|
{ .compatible = "st,stih416-front-pinctrl", .data = &stih416_data},
|
|
{ .compatible = "st,stih416-rear-pinctrl", .data = &stih416_data},
|
|
{ .compatible = "st,stih416-fvdp-fe-pinctrl", .data = &stih416_data},
|
|
{ .compatible = "st,stih416-fvdp-lite-pinctrl", .data = &stih416_data},
|
|
{ /* sentinel */ }
|
|
};
|
|
|
|
static int st_pctl_probe_dt(struct platform_device *pdev,
|
|
struct pinctrl_desc *pctl_desc, struct st_pinctrl *info)
|
|
{
|
|
int ret = 0;
|
|
int i = 0, j = 0, k = 0, bank;
|
|
struct pinctrl_pin_desc *pdesc;
|
|
struct device_node *np = pdev->dev.of_node;
|
|
struct device_node *child;
|
|
int grp_index = 0;
|
|
|
|
st_pctl_dt_child_count(info, np);
|
|
if (!info->nbanks) {
|
|
dev_err(&pdev->dev, "you need atleast one gpio bank\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
dev_info(&pdev->dev, "nbanks = %d\n", info->nbanks);
|
|
dev_info(&pdev->dev, "nfunctions = %d\n", info->nfunctions);
|
|
dev_info(&pdev->dev, "ngroups = %d\n", info->ngroups);
|
|
|
|
info->functions = devm_kzalloc(&pdev->dev,
|
|
info->nfunctions * sizeof(*info->functions), GFP_KERNEL);
|
|
|
|
info->groups = devm_kzalloc(&pdev->dev,
|
|
info->ngroups * sizeof(*info->groups) , GFP_KERNEL);
|
|
|
|
info->banks = devm_kzalloc(&pdev->dev,
|
|
info->nbanks * sizeof(*info->banks), GFP_KERNEL);
|
|
|
|
if (!info->functions || !info->groups || !info->banks)
|
|
return -ENOMEM;
|
|
|
|
info->regmap = syscon_regmap_lookup_by_phandle(np, "st,syscfg");
|
|
if (IS_ERR(info->regmap)) {
|
|
dev_err(info->dev, "No syscfg phandle specified\n");
|
|
return PTR_ERR(info->regmap);
|
|
}
|
|
info->data = of_match_node(st_pctl_of_match, np)->data;
|
|
|
|
pctl_desc->npins = info->nbanks * ST_GPIO_PINS_PER_BANK;
|
|
pdesc = devm_kzalloc(&pdev->dev,
|
|
sizeof(*pdesc) * pctl_desc->npins, GFP_KERNEL);
|
|
if (!pdesc)
|
|
return -ENOMEM;
|
|
|
|
pctl_desc->pins = pdesc;
|
|
|
|
bank = 0;
|
|
for_each_child_of_node(np, child) {
|
|
if (of_property_read_bool(child, "gpio-controller")) {
|
|
const char *bank_name = NULL;
|
|
ret = st_gpiolib_register_bank(info, bank, child);
|
|
if (ret)
|
|
return ret;
|
|
|
|
k = info->banks[bank].range.pin_base;
|
|
bank_name = info->banks[bank].range.name;
|
|
for (j = 0; j < ST_GPIO_PINS_PER_BANK; j++, k++) {
|
|
pdesc->number = k;
|
|
pdesc->name = kasprintf(GFP_KERNEL, "%s[%d]",
|
|
bank_name, j);
|
|
pdesc++;
|
|
}
|
|
st_parse_syscfgs(info, bank, child);
|
|
bank++;
|
|
} else {
|
|
ret = st_pctl_parse_functions(child, info,
|
|
i++, &grp_index);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "No functions found.\n");
|
|
return ret;
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int st_pctl_probe(struct platform_device *pdev)
|
|
{
|
|
struct st_pinctrl *info;
|
|
struct pinctrl_desc *pctl_desc;
|
|
int ret, i;
|
|
|
|
if (!pdev->dev.of_node) {
|
|
dev_err(&pdev->dev, "device node not found.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
pctl_desc = devm_kzalloc(&pdev->dev, sizeof(*pctl_desc), GFP_KERNEL);
|
|
if (!pctl_desc)
|
|
return -ENOMEM;
|
|
|
|
info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
|
|
if (!info)
|
|
return -ENOMEM;
|
|
|
|
info->dev = &pdev->dev;
|
|
platform_set_drvdata(pdev, info);
|
|
ret = st_pctl_probe_dt(pdev, pctl_desc, info);
|
|
if (ret)
|
|
return ret;
|
|
|
|
pctl_desc->owner = THIS_MODULE;
|
|
pctl_desc->pctlops = &st_pctlops;
|
|
pctl_desc->pmxops = &st_pmxops;
|
|
pctl_desc->confops = &st_confops;
|
|
pctl_desc->name = dev_name(&pdev->dev);
|
|
|
|
info->pctl = pinctrl_register(pctl_desc, &pdev->dev, info);
|
|
if (!info->pctl) {
|
|
dev_err(&pdev->dev, "Failed pinctrl registration\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
for (i = 0; i < info->nbanks; i++)
|
|
pinctrl_add_gpio_range(info->pctl, &info->banks[i].range);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver st_pctl_driver = {
|
|
.driver = {
|
|
.name = "st-pinctrl",
|
|
.owner = THIS_MODULE,
|
|
.of_match_table = st_pctl_of_match,
|
|
},
|
|
.probe = st_pctl_probe,
|
|
};
|
|
|
|
static int __init st_pctl_init(void)
|
|
{
|
|
return platform_driver_register(&st_pctl_driver);
|
|
}
|
|
arch_initcall(st_pctl_init);
|