AcoSail/kernel_optimize_test
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kernel_optimize_test/drivers/pinctrl/pinctrl-xway.c
Linus Walleij e157369759 pinctrl: xway: Be sure to clamp return value 
As we want gpio_chip .get() calls to be able to return negative
error codes and propagate to drivers, we need to go over all
drivers and make sure their return values are clamped to [0,1].
We do this by using the ret = !!(val) design pattern.

Cc: Pramod Gurav <pramod.gurav@smartplayin.com>
Cc: John Crispin <blogic@openwrt.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-12-26 22:28:35 +01:00

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/*
* linux/drivers/pinctrl/pinmux-xway.c
* based on linux/drivers/pinctrl/pinmux-pxa910.c
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* publishhed by the Free Software Foundation.
*
* Copyright (C) 2012 John Crispin <blogic@openwrt.org>
*/
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/of_address.h>
#include <linux/of_gpio.h>
#include <linux/ioport.h>
#include <linux/io.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include "pinctrl-lantiq.h"
#include <lantiq_soc.h>
/* we have 3 1/2 banks of 16 bit each */
#define PINS 16
#define PORT3 3
#define PORT(x) (x / PINS)
#define PORT_PIN(x) (x % PINS)
/* we have 2 mux bits that can be set for each pin */
#define MUX_ALT0 0x1
#define MUX_ALT1 0x2
/*
* each bank has this offset apart from the 1/2 bank that is mixed into the
* other 3 ranges
*/
#define REG_OFF 0x30
/* these are the offsets to our registers */
#define GPIO_BASE(p) (REG_OFF * PORT(p))
#define GPIO_OUT(p) GPIO_BASE(p)
#define GPIO_IN(p) (GPIO_BASE(p) + 0x04)
#define GPIO_DIR(p) (GPIO_BASE(p) + 0x08)
#define GPIO_ALT0(p) (GPIO_BASE(p) + 0x0C)
#define GPIO_ALT1(p) (GPIO_BASE(p) + 0x10)
#define GPIO_OD(p) (GPIO_BASE(p) + 0x14)
#define GPIO_PUDSEL(p) (GPIO_BASE(p) + 0x1c)
#define GPIO_PUDEN(p) (GPIO_BASE(p) + 0x20)
/* the 1/2 port needs special offsets for some registers */
#define GPIO3_OD (GPIO_BASE(0) + 0x24)
#define GPIO3_PUDSEL (GPIO_BASE(0) + 0x28)
#define GPIO3_PUDEN (GPIO_BASE(0) + 0x2C)
#define GPIO3_ALT1 (GPIO_BASE(PINS) + 0x24)
/* macros to help us access the registers */
#define gpio_getbit(m, r, p) (!!(ltq_r32(m + r) & BIT(p)))
#define gpio_setbit(m, r, p) ltq_w32_mask(0, BIT(p), m + r)
#define gpio_clearbit(m, r, p) ltq_w32_mask(BIT(p), 0, m + r)
#define MFP_XWAY(a, f0, f1, f2, f3) \
{ \
.name = #a, \
.pin = a, \
.func = { \
XWAY_MUX_##f0, \
XWAY_MUX_##f1, \
XWAY_MUX_##f2, \
XWAY_MUX_##f3, \
}, \
}
#define GRP_MUX(a, m, p) \
{ .name = a, .mux = XWAY_MUX_##m, .pins = p, .npins = ARRAY_SIZE(p), }
#define FUNC_MUX(f, m) \
{ .func = f, .mux = XWAY_MUX_##m, }
#define XWAY_MAX_PIN 32
#define XR9_MAX_PIN 56
enum xway_mux {
XWAY_MUX_GPIO = 0,
XWAY_MUX_SPI,
XWAY_MUX_ASC,
XWAY_MUX_PCI,
XWAY_MUX_CGU,
XWAY_MUX_EBU,
XWAY_MUX_JTAG,
XWAY_MUX_EXIN,
XWAY_MUX_TDM,
XWAY_MUX_STP,
XWAY_MUX_SIN,
XWAY_MUX_GPT,
XWAY_MUX_NMI,
XWAY_MUX_MDIO,
XWAY_MUX_MII,
XWAY_MUX_EPHY,
XWAY_MUX_DFE,
XWAY_MUX_SDIO,
XWAY_MUX_GPHY,
XWAY_MUX_NONE = 0xffff,
};
static const struct ltq_mfp_pin xway_mfp[] = {
/* pin f0 f1 f2 f3 */
MFP_XWAY(GPIO0, GPIO, EXIN, NONE, TDM),
MFP_XWAY(GPIO1, GPIO, EXIN, NONE, NONE),
MFP_XWAY(GPIO2, GPIO, CGU, EXIN, GPHY),
MFP_XWAY(GPIO3, GPIO, CGU, NONE, PCI),
MFP_XWAY(GPIO4, GPIO, STP, NONE, ASC),
MFP_XWAY(GPIO5, GPIO, STP, NONE, GPHY),
MFP_XWAY(GPIO6, GPIO, STP, GPT, ASC),
MFP_XWAY(GPIO7, GPIO, CGU, PCI, GPHY),
MFP_XWAY(GPIO8, GPIO, CGU, NMI, NONE),
MFP_XWAY(GPIO9, GPIO, ASC, SPI, EXIN),
MFP_XWAY(GPIO10, GPIO, ASC, SPI, NONE),
MFP_XWAY(GPIO11, GPIO, ASC, PCI, SPI),
MFP_XWAY(GPIO12, GPIO, ASC, NONE, NONE),
MFP_XWAY(GPIO13, GPIO, EBU, SPI, NONE),
MFP_XWAY(GPIO14, GPIO, CGU, PCI, NONE),
MFP_XWAY(GPIO15, GPIO, SPI, JTAG, NONE),
MFP_XWAY(GPIO16, GPIO, SPI, NONE, JTAG),
MFP_XWAY(GPIO17, GPIO, SPI, NONE, JTAG),
MFP_XWAY(GPIO18, GPIO, SPI, NONE, JTAG),
MFP_XWAY(GPIO19, GPIO, PCI, NONE, NONE),
MFP_XWAY(GPIO20, GPIO, JTAG, NONE, NONE),
MFP_XWAY(GPIO21, GPIO, PCI, EBU, GPT),
MFP_XWAY(GPIO22, GPIO, SPI, NONE, NONE),
MFP_XWAY(GPIO23, GPIO, EBU, PCI, STP),
MFP_XWAY(GPIO24, GPIO, EBU, TDM, PCI),
MFP_XWAY(GPIO25, GPIO, TDM, NONE, ASC),
MFP_XWAY(GPIO26, GPIO, EBU, NONE, TDM),
MFP_XWAY(GPIO27, GPIO, TDM, NONE, ASC),
MFP_XWAY(GPIO28, GPIO, GPT, NONE, NONE),
MFP_XWAY(GPIO29, GPIO, PCI, NONE, NONE),
MFP_XWAY(GPIO30, GPIO, PCI, NONE, NONE),
MFP_XWAY(GPIO31, GPIO, EBU, PCI, NONE),
MFP_XWAY(GPIO32, GPIO, NONE, NONE, EBU),
MFP_XWAY(GPIO33, GPIO, NONE, NONE, EBU),
MFP_XWAY(GPIO34, GPIO, NONE, NONE, EBU),
MFP_XWAY(GPIO35, GPIO, NONE, NONE, EBU),
MFP_XWAY(GPIO36, GPIO, SIN, NONE, EBU),
MFP_XWAY(GPIO37, GPIO, PCI, NONE, NONE),
MFP_XWAY(GPIO38, GPIO, PCI, NONE, NONE),
MFP_XWAY(GPIO39, GPIO, EXIN, NONE, NONE),
MFP_XWAY(GPIO40, GPIO, NONE, NONE, NONE),
MFP_XWAY(GPIO41, GPIO, NONE, NONE, NONE),
MFP_XWAY(GPIO42, GPIO, MDIO, NONE, NONE),
MFP_XWAY(GPIO43, GPIO, MDIO, NONE, NONE),
MFP_XWAY(GPIO44, GPIO, NONE, GPHY, SIN),
MFP_XWAY(GPIO45, GPIO, NONE, GPHY, SIN),
MFP_XWAY(GPIO46, GPIO, NONE, NONE, EXIN),
MFP_XWAY(GPIO47, GPIO, NONE, GPHY, SIN),
MFP_XWAY(GPIO48, GPIO, EBU, NONE, NONE),
MFP_XWAY(GPIO49, GPIO, EBU, NONE, NONE),
MFP_XWAY(GPIO50, GPIO, NONE, NONE, NONE),
MFP_XWAY(GPIO51, GPIO, NONE, NONE, NONE),
MFP_XWAY(GPIO52, GPIO, NONE, NONE, NONE),
MFP_XWAY(GPIO53, GPIO, NONE, NONE, NONE),
MFP_XWAY(GPIO54, GPIO, NONE, NONE, NONE),
MFP_XWAY(GPIO55, GPIO, NONE, NONE, NONE),
};
static const struct ltq_mfp_pin ase_mfp[] = {
/* pin f0 f1 f2 f3 */
MFP_XWAY(GPIO0, GPIO, EXIN, MII, TDM),
MFP_XWAY(GPIO1, GPIO, STP, DFE, EBU),
MFP_XWAY(GPIO2, GPIO, STP, DFE, EPHY),
MFP_XWAY(GPIO3, GPIO, STP, EPHY, EBU),
MFP_XWAY(GPIO4, GPIO, GPT, EPHY, MII),
MFP_XWAY(GPIO5, GPIO, MII, ASC, GPT),
MFP_XWAY(GPIO6, GPIO, MII, ASC, EXIN),
MFP_XWAY(GPIO7, GPIO, SPI, MII, JTAG),
MFP_XWAY(GPIO8, GPIO, SPI, MII, JTAG),
MFP_XWAY(GPIO9, GPIO, SPI, MII, JTAG),
MFP_XWAY(GPIO10, GPIO, SPI, MII, JTAG),
MFP_XWAY(GPIO11, GPIO, EBU, CGU, JTAG),
MFP_XWAY(GPIO12, GPIO, EBU, MII, SDIO),
MFP_XWAY(GPIO13, GPIO, EBU, MII, CGU),
MFP_XWAY(GPIO14, GPIO, EBU, SPI, CGU),
MFP_XWAY(GPIO15, GPIO, EBU, SPI, SDIO),
MFP_XWAY(GPIO16, GPIO, NONE, NONE, NONE),
MFP_XWAY(GPIO17, GPIO, NONE, NONE, NONE),
MFP_XWAY(GPIO18, GPIO, NONE, NONE, NONE),
MFP_XWAY(GPIO19, GPIO, EBU, MII, SDIO),
MFP_XWAY(GPIO20, GPIO, EBU, MII, SDIO),
MFP_XWAY(GPIO21, GPIO, EBU, MII, SDIO),
MFP_XWAY(GPIO22, GPIO, EBU, MII, CGU),
MFP_XWAY(GPIO23, GPIO, EBU, MII, CGU),
MFP_XWAY(GPIO24, GPIO, EBU, NONE, MII),
MFP_XWAY(GPIO25, GPIO, EBU, MII, GPT),
MFP_XWAY(GPIO26, GPIO, EBU, MII, SDIO),
MFP_XWAY(GPIO27, GPIO, EBU, NONE, MII),
MFP_XWAY(GPIO28, GPIO, MII, EBU, SDIO),
MFP_XWAY(GPIO29, GPIO, EBU, MII, EXIN),
MFP_XWAY(GPIO30, GPIO, NONE, NONE, NONE),
MFP_XWAY(GPIO31, GPIO, NONE, NONE, NONE),
};
static const unsigned pins_jtag[] = {GPIO15, GPIO16, GPIO17, GPIO19, GPIO35};
static const unsigned pins_asc0[] = {GPIO11, GPIO12};
static const unsigned pins_asc0_cts_rts[] = {GPIO9, GPIO10};
static const unsigned pins_stp[] = {GPIO4, GPIO5, GPIO6};
static const unsigned pins_nmi[] = {GPIO8};
static const unsigned pins_mdio[] = {GPIO42, GPIO43};
static const unsigned pins_gphy0_led0[] = {GPIO5};
static const unsigned pins_gphy0_led1[] = {GPIO7};
static const unsigned pins_gphy0_led2[] = {GPIO2};
static const unsigned pins_gphy1_led0[] = {GPIO44};
static const unsigned pins_gphy1_led1[] = {GPIO45};
static const unsigned pins_gphy1_led2[] = {GPIO47};
static const unsigned pins_ebu_a24[] = {GPIO13};
static const unsigned pins_ebu_clk[] = {GPIO21};
static const unsigned pins_ebu_cs1[] = {GPIO23};
static const unsigned pins_ebu_a23[] = {GPIO24};
static const unsigned pins_ebu_wait[] = {GPIO26};
static const unsigned pins_ebu_a25[] = {GPIO31};
static const unsigned pins_ebu_rdy[] = {GPIO48};
static const unsigned pins_ebu_rd[] = {GPIO49};
static const unsigned pins_nand_ale[] = {GPIO13};
static const unsigned pins_nand_cs1[] = {GPIO23};
static const unsigned pins_nand_cle[] = {GPIO24};
static const unsigned pins_nand_rdy[] = {GPIO48};
static const unsigned pins_nand_rd[] = {GPIO49};
static const unsigned pins_exin0[] = {GPIO0};
static const unsigned pins_exin1[] = {GPIO1};
static const unsigned pins_exin2[] = {GPIO2};
static const unsigned pins_exin3[] = {GPIO39};
static const unsigned pins_exin4[] = {GPIO46};
static const unsigned pins_exin5[] = {GPIO9};
static const unsigned pins_spi[] = {GPIO16, GPIO17, GPIO18};
static const unsigned pins_spi_cs1[] = {GPIO15};
static const unsigned pins_spi_cs2[] = {GPIO21};
static const unsigned pins_spi_cs3[] = {GPIO13};
static const unsigned pins_spi_cs4[] = {GPIO10};
static const unsigned pins_spi_cs5[] = {GPIO9};
static const unsigned pins_spi_cs6[] = {GPIO11};
static const unsigned pins_gpt1[] = {GPIO28};
static const unsigned pins_gpt2[] = {GPIO21};
static const unsigned pins_gpt3[] = {GPIO6};
static const unsigned pins_clkout0[] = {GPIO8};
static const unsigned pins_clkout1[] = {GPIO7};
static const unsigned pins_clkout2[] = {GPIO3};
static const unsigned pins_clkout3[] = {GPIO2};
static const unsigned pins_pci_gnt1[] = {GPIO30};
static const unsigned pins_pci_gnt2[] = {GPIO23};
static const unsigned pins_pci_gnt3[] = {GPIO19};
static const unsigned pins_pci_gnt4[] = {GPIO38};
static const unsigned pins_pci_req1[] = {GPIO29};
static const unsigned pins_pci_req2[] = {GPIO31};
static const unsigned pins_pci_req3[] = {GPIO3};
static const unsigned pins_pci_req4[] = {GPIO37};
static const unsigned ase_pins_jtag[] = {GPIO7, GPIO8, GPIO9, GPIO10, GPIO11};
static const unsigned ase_pins_asc[] = {GPIO5, GPIO6};
static const unsigned ase_pins_stp[] = {GPIO1, GPIO2, GPIO3};
static const unsigned ase_pins_ephy[] = {GPIO2, GPIO3, GPIO4};
static const unsigned ase_pins_dfe[] = {GPIO1, GPIO2};
static const unsigned ase_pins_spi[] = {GPIO8, GPIO9, GPIO10};
static const unsigned ase_pins_spi_cs1[] = {GPIO7};
static const unsigned ase_pins_spi_cs2[] = {GPIO15};
static const unsigned ase_pins_spi_cs3[] = {GPIO14};
static const unsigned ase_pins_exin0[] = {GPIO6};
static const unsigned ase_pins_exin1[] = {GPIO29};
static const unsigned ase_pins_exin2[] = {GPIO0};
static const unsigned ase_pins_gpt1[] = {GPIO5};
static const unsigned ase_pins_gpt2[] = {GPIO4};
static const unsigned ase_pins_gpt3[] = {GPIO25};
static const struct ltq_pin_group xway_grps[] = {
GRP_MUX("exin0", EXIN, pins_exin0),
GRP_MUX("exin1", EXIN, pins_exin1),
GRP_MUX("exin2", EXIN, pins_exin2),
GRP_MUX("jtag", JTAG, pins_jtag),
GRP_MUX("ebu a23", EBU, pins_ebu_a23),
GRP_MUX("ebu a24", EBU, pins_ebu_a24),
GRP_MUX("ebu a25", EBU, pins_ebu_a25),
GRP_MUX("ebu clk", EBU, pins_ebu_clk),
GRP_MUX("ebu cs1", EBU, pins_ebu_cs1),
GRP_MUX("ebu wait", EBU, pins_ebu_wait),
GRP_MUX("nand ale", EBU, pins_nand_ale),
GRP_MUX("nand cs1", EBU, pins_nand_cs1),
GRP_MUX("nand cle", EBU, pins_nand_cle),
GRP_MUX("spi", SPI, pins_spi),
GRP_MUX("spi_cs1", SPI, pins_spi_cs1),
GRP_MUX("spi_cs2", SPI, pins_spi_cs2),
GRP_MUX("spi_cs3", SPI, pins_spi_cs3),
GRP_MUX("spi_cs4", SPI, pins_spi_cs4),
GRP_MUX("spi_cs5", SPI, pins_spi_cs5),
GRP_MUX("spi_cs6", SPI, pins_spi_cs6),
GRP_MUX("asc0", ASC, pins_asc0),
GRP_MUX("asc0 cts rts", ASC, pins_asc0_cts_rts),
GRP_MUX("stp", STP, pins_stp),
GRP_MUX("nmi", NMI, pins_nmi),
GRP_MUX("gpt1", GPT, pins_gpt1),
GRP_MUX("gpt2", GPT, pins_gpt2),
GRP_MUX("gpt3", GPT, pins_gpt3),
GRP_MUX("clkout0", CGU, pins_clkout0),
GRP_MUX("clkout1", CGU, pins_clkout1),
GRP_MUX("clkout2", CGU, pins_clkout2),
GRP_MUX("clkout3", CGU, pins_clkout3),
GRP_MUX("gnt1", PCI, pins_pci_gnt1),
GRP_MUX("gnt2", PCI, pins_pci_gnt2),
GRP_MUX("gnt3", PCI, pins_pci_gnt3),
GRP_MUX("req1", PCI, pins_pci_req1),
GRP_MUX("req2", PCI, pins_pci_req2),
GRP_MUX("req3", PCI, pins_pci_req3),
/* xrx only */
GRP_MUX("nand rdy", EBU, pins_nand_rdy),
GRP_MUX("nand rd", EBU, pins_nand_rd),
GRP_MUX("exin3", EXIN, pins_exin3),
GRP_MUX("exin4", EXIN, pins_exin4),
GRP_MUX("exin5", EXIN, pins_exin5),
GRP_MUX("gnt4", PCI, pins_pci_gnt4),
GRP_MUX("req4", PCI, pins_pci_gnt4),
GRP_MUX("mdio", MDIO, pins_mdio),
GRP_MUX("gphy0 led0", GPHY, pins_gphy0_led0),
GRP_MUX("gphy0 led1", GPHY, pins_gphy0_led1),
GRP_MUX("gphy0 led2", GPHY, pins_gphy0_led2),
GRP_MUX("gphy1 led0", GPHY, pins_gphy1_led0),
GRP_MUX("gphy1 led1", GPHY, pins_gphy1_led1),
GRP_MUX("gphy1 led2", GPHY, pins_gphy1_led2),
};
static const struct ltq_pin_group ase_grps[] = {
GRP_MUX("exin0", EXIN, ase_pins_exin0),
GRP_MUX("exin1", EXIN, ase_pins_exin1),
GRP_MUX("exin2", EXIN, ase_pins_exin2),
GRP_MUX("jtag", JTAG, ase_pins_jtag),
GRP_MUX("stp", STP, ase_pins_stp),
GRP_MUX("asc", ASC, ase_pins_asc),
GRP_MUX("gpt1", GPT, ase_pins_gpt1),
GRP_MUX("gpt2", GPT, ase_pins_gpt2),
GRP_MUX("gpt3", GPT, ase_pins_gpt3),
GRP_MUX("ephy", EPHY, ase_pins_ephy),
GRP_MUX("dfe", DFE, ase_pins_dfe),
GRP_MUX("spi", SPI, ase_pins_spi),
GRP_MUX("spi_cs1", SPI, ase_pins_spi_cs1),
GRP_MUX("spi_cs2", SPI, ase_pins_spi_cs2),
GRP_MUX("spi_cs3", SPI, ase_pins_spi_cs3),
};
static const char * const xway_pci_grps[] = {"gnt1", "gnt2",
"gnt3", "req1",
"req2", "req3"};
static const char * const xway_spi_grps[] = {"spi", "spi_cs1",
"spi_cs2", "spi_cs3",
"spi_cs4", "spi_cs5",
"spi_cs6"};
static const char * const xway_cgu_grps[] = {"clkout0", "clkout1",
"clkout2", "clkout3"};
static const char * const xway_ebu_grps[] = {"ebu a23", "ebu a24",
"ebu a25", "ebu cs1",
"ebu wait", "ebu clk",
"nand ale", "nand cs1",
"nand cle"};
static const char * const xway_exin_grps[] = {"exin0", "exin1", "exin2"};
static const char * const xway_gpt_grps[] = {"gpt1", "gpt2", "gpt3"};
static const char * const xway_asc_grps[] = {"asc0", "asc0 cts rts"};
static const char * const xway_jtag_grps[] = {"jtag"};
static const char * const xway_stp_grps[] = {"stp"};
static const char * const xway_nmi_grps[] = {"nmi"};
/* ar9/vr9/gr9 */
static const char * const xrx_mdio_grps[] = {"mdio"};
static const char * const xrx_gphy_grps[] = {"gphy0 led0", "gphy0 led1",
"gphy0 led2", "gphy1 led0",
"gphy1 led1", "gphy1 led2"};
static const char * const xrx_ebu_grps[] = {"ebu a23", "ebu a24",
"ebu a25", "ebu cs1",
"ebu wait", "ebu clk",
"nand ale", "nand cs1",
"nand cle", "nand rdy",
"nand rd"};
static const char * const xrx_exin_grps[] = {"exin0", "exin1", "exin2",
"exin3", "exin4", "exin5"};
static const char * const xrx_pci_grps[] = {"gnt1", "gnt2",
"gnt3", "gnt4",
"req1", "req2",
"req3", "req4"};
/* ase */
static const char * const ase_exin_grps[] = {"exin0", "exin1", "exin2"};
static const char * const ase_gpt_grps[] = {"gpt1", "gpt2", "gpt3"};
static const char * const ase_dfe_grps[] = {"dfe"};
static const char * const ase_ephy_grps[] = {"ephy"};
static const char * const ase_asc_grps[] = {"asc"};
static const char * const ase_jtag_grps[] = {"jtag"};
static const char * const ase_stp_grps[] = {"stp"};
static const char * const ase_spi_grps[] = {"spi", "spi_cs1",
"spi_cs2", "spi_cs3"};
static const struct ltq_pmx_func danube_funcs[] = {
{"spi", ARRAY_AND_SIZE(xway_spi_grps)},
{"asc", ARRAY_AND_SIZE(xway_asc_grps)},
{"cgu", ARRAY_AND_SIZE(xway_cgu_grps)},
{"jtag", ARRAY_AND_SIZE(xway_jtag_grps)},
{"exin", ARRAY_AND_SIZE(xway_exin_grps)},
{"stp", ARRAY_AND_SIZE(xway_stp_grps)},
{"gpt", ARRAY_AND_SIZE(xway_gpt_grps)},
{"nmi", ARRAY_AND_SIZE(xway_nmi_grps)},
{"pci", ARRAY_AND_SIZE(xway_pci_grps)},
{"ebu", ARRAY_AND_SIZE(xway_ebu_grps)},
};
static const struct ltq_pmx_func xrx_funcs[] = {
{"spi", ARRAY_AND_SIZE(xway_spi_grps)},
{"asc", ARRAY_AND_SIZE(xway_asc_grps)},
{"cgu", ARRAY_AND_SIZE(xway_cgu_grps)},
{"jtag", ARRAY_AND_SIZE(xway_jtag_grps)},
{"exin", ARRAY_AND_SIZE(xrx_exin_grps)},
{"stp", ARRAY_AND_SIZE(xway_stp_grps)},
{"gpt", ARRAY_AND_SIZE(xway_gpt_grps)},
{"nmi", ARRAY_AND_SIZE(xway_nmi_grps)},
{"pci", ARRAY_AND_SIZE(xrx_pci_grps)},
{"ebu", ARRAY_AND_SIZE(xrx_ebu_grps)},
{"mdio", ARRAY_AND_SIZE(xrx_mdio_grps)},
{"gphy", ARRAY_AND_SIZE(xrx_gphy_grps)},
};
static const struct ltq_pmx_func ase_funcs[] = {
{"spi", ARRAY_AND_SIZE(ase_spi_grps)},
{"asc", ARRAY_AND_SIZE(ase_asc_grps)},
{"jtag", ARRAY_AND_SIZE(ase_jtag_grps)},
{"exin", ARRAY_AND_SIZE(ase_exin_grps)},
{"stp", ARRAY_AND_SIZE(ase_stp_grps)},
{"gpt", ARRAY_AND_SIZE(ase_gpt_grps)},
{"ephy", ARRAY_AND_SIZE(ase_ephy_grps)},
{"dfe", ARRAY_AND_SIZE(ase_dfe_grps)},
};
/* --------- pinconf related code --------- */
static int xway_pinconf_get(struct pinctrl_dev *pctldev,
unsigned pin,
unsigned long *config)
{
struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctldev);
enum ltq_pinconf_param param = LTQ_PINCONF_UNPACK_PARAM(*config);
int port = PORT(pin);
u32 reg;
switch (param) {
case LTQ_PINCONF_PARAM_OPEN_DRAIN:
if (port == PORT3)
reg = GPIO3_OD;
else
reg = GPIO_OD(pin);
*config = LTQ_PINCONF_PACK(param,
!gpio_getbit(info->membase[0], reg, PORT_PIN(pin)));
break;
case LTQ_PINCONF_PARAM_PULL:
if (port == PORT3)
reg = GPIO3_PUDEN;
else
reg = GPIO_PUDEN(pin);
if (!gpio_getbit(info->membase[0], reg, PORT_PIN(pin))) {
*config = LTQ_PINCONF_PACK(param, 0);
break;
}
if (port == PORT3)
reg = GPIO3_PUDSEL;
else
reg = GPIO_PUDSEL(pin);
if (!gpio_getbit(info->membase[0], reg, PORT_PIN(pin)))
*config = LTQ_PINCONF_PACK(param, 2);
else
*config = LTQ_PINCONF_PACK(param, 1);
break;
case LTQ_PINCONF_PARAM_OUTPUT:
reg = GPIO_DIR(pin);
*config = LTQ_PINCONF_PACK(param,
gpio_getbit(info->membase[0], reg, PORT_PIN(pin)));
break;
default:
dev_err(pctldev->dev, "Invalid config param %04x\n", param);
return -ENOTSUPP;
}
return 0;
}
static int xway_pinconf_set(struct pinctrl_dev *pctldev,
unsigned pin,
unsigned long *configs,
unsigned num_configs)
{
struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctldev);
enum ltq_pinconf_param param;
int arg;
int port = PORT(pin);
u32 reg;
int i;
for (i = 0; i < num_configs; i++) {
param = LTQ_PINCONF_UNPACK_PARAM(configs[i]);
arg = LTQ_PINCONF_UNPACK_ARG(configs[i]);
switch (param) {
case LTQ_PINCONF_PARAM_OPEN_DRAIN:
if (port == PORT3)
reg = GPIO3_OD;
else
reg = GPIO_OD(pin);
if (arg == 0)
gpio_setbit(info->membase[0],
reg,
PORT_PIN(pin));
else
gpio_clearbit(info->membase[0],
reg,
PORT_PIN(pin));
break;
case LTQ_PINCONF_PARAM_PULL:
if (port == PORT3)
reg = GPIO3_PUDEN;
else
reg = GPIO_PUDEN(pin);
if (arg == 0) {
gpio_clearbit(info->membase[0],
reg,
PORT_PIN(pin));
break;
}
gpio_setbit(info->membase[0], reg, PORT_PIN(pin));
if (port == PORT3)
reg = GPIO3_PUDSEL;
else
reg = GPIO_PUDSEL(pin);
if (arg == 1)
gpio_clearbit(info->membase[0],
reg,
PORT_PIN(pin));
else if (arg == 2)
gpio_setbit(info->membase[0],
reg,
PORT_PIN(pin));
else
dev_err(pctldev->dev,
"Invalid pull value %d\n", arg);
break;
case LTQ_PINCONF_PARAM_OUTPUT:
reg = GPIO_DIR(pin);
if (arg == 0)
gpio_clearbit(info->membase[0],
reg,
PORT_PIN(pin));
else
gpio_setbit(info->membase[0],
reg,
PORT_PIN(pin));
break;
default:
dev_err(pctldev->dev,
"Invalid config param %04x\n", param);
return -ENOTSUPP;
}
} /* for each config */
return 0;
}
int xway_pinconf_group_set(struct pinctrl_dev *pctldev,
unsigned selector,
unsigned long *configs,
unsigned num_configs)
{
struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctldev);
int i, ret = 0;
for (i = 0; i < info->grps[selector].npins && !ret; i++)
ret = xway_pinconf_set(pctldev,
info->grps[selector].pins[i],
configs,
num_configs);
return ret;
}
static const struct pinconf_ops xway_pinconf_ops = {
.pin_config_get = xway_pinconf_get,
.pin_config_set = xway_pinconf_set,
.pin_config_group_set = xway_pinconf_group_set,
};
static struct pinctrl_desc xway_pctrl_desc = {
.owner = THIS_MODULE,
.confops = &xway_pinconf_ops,
};
static inline int xway_mux_apply(struct pinctrl_dev *pctrldev,
int pin, int mux)
{
struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctrldev);
int port = PORT(pin);
u32 alt1_reg = GPIO_ALT1(pin);
if (port == PORT3)
alt1_reg = GPIO3_ALT1;
if (mux & MUX_ALT0)
gpio_setbit(info->membase[0], GPIO_ALT0(pin), PORT_PIN(pin));
else
gpio_clearbit(info->membase[0], GPIO_ALT0(pin), PORT_PIN(pin));
if (mux & MUX_ALT1)
gpio_setbit(info->membase[0], alt1_reg, PORT_PIN(pin));
else
gpio_clearbit(info->membase[0], alt1_reg, PORT_PIN(pin));
return 0;
}
static const struct ltq_cfg_param xway_cfg_params[] = {
{"lantiq,pull", LTQ_PINCONF_PARAM_PULL},
{"lantiq,open-drain", LTQ_PINCONF_PARAM_OPEN_DRAIN},
{"lantiq,output", LTQ_PINCONF_PARAM_OUTPUT},
};
static struct ltq_pinmux_info xway_info = {
.desc = &xway_pctrl_desc,
.apply_mux = xway_mux_apply,
.params = xway_cfg_params,
.num_params = ARRAY_SIZE(xway_cfg_params),
};
/* --------- gpio_chip related code --------- */
static void xway_gpio_set(struct gpio_chip *chip, unsigned int pin, int val)
{
struct ltq_pinmux_info *info = dev_get_drvdata(chip->parent);
if (val)
gpio_setbit(info->membase[0], GPIO_OUT(pin), PORT_PIN(pin));
else
gpio_clearbit(info->membase[0], GPIO_OUT(pin), PORT_PIN(pin));
}
static int xway_gpio_get(struct gpio_chip *chip, unsigned int pin)
{
struct ltq_pinmux_info *info = dev_get_drvdata(chip->parent);
return !!gpio_getbit(info->membase[0], GPIO_IN(pin), PORT_PIN(pin));
}
static int xway_gpio_dir_in(struct gpio_chip *chip, unsigned int pin)
{
struct ltq_pinmux_info *info = dev_get_drvdata(chip->parent);
gpio_clearbit(info->membase[0], GPIO_DIR(pin), PORT_PIN(pin));
return 0;
}
static int xway_gpio_dir_out(struct gpio_chip *chip, unsigned int pin, int val)
{
struct ltq_pinmux_info *info = dev_get_drvdata(chip->parent);
gpio_setbit(info->membase[0], GPIO_DIR(pin), PORT_PIN(pin));
xway_gpio_set(chip, pin, val);
return 0;
}
/*
* gpiolib gpiod_to_irq callback function.
* Returns the mapped IRQ (external interrupt) number for a given GPIO pin.
*/
static int xway_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
{
struct ltq_pinmux_info *info = dev_get_drvdata(chip->parent);
int i;
for (i = 0; i < info->num_exin; i++)
if (info->exin[i] == offset)
return ltq_eiu_get_irq(i);
return -1;
}
static struct gpio_chip xway_chip = {
.label = "gpio-xway",
.direction_input = xway_gpio_dir_in,
.direction_output = xway_gpio_dir_out,
.get = xway_gpio_get,
.set = xway_gpio_set,
.request = gpiochip_generic_request,
.free = gpiochip_generic_free,
.to_irq = xway_gpio_to_irq,
.base = -1,
};
/* --------- register the pinctrl layer --------- */
static const unsigned xway_exin_pin_map[] = {GPIO0, GPIO1, GPIO2, GPIO39, GPIO46, GPIO9};
static const unsigned ase_exin_pins_map[] = {GPIO6, GPIO29, GPIO0};
static struct pinctrl_xway_soc {
int pin_count;
const struct ltq_mfp_pin *mfp;
const struct ltq_pin_group *grps;
unsigned int num_grps;
const struct ltq_pmx_func *funcs;
unsigned int num_funcs;
const unsigned *exin;
unsigned int num_exin;
} soc_cfg[] = {
/* legacy xway */
{XWAY_MAX_PIN, xway_mfp,
xway_grps, ARRAY_SIZE(xway_grps),
danube_funcs, ARRAY_SIZE(danube_funcs),
xway_exin_pin_map, 3},
/* xway xr9 series */
{XR9_MAX_PIN, xway_mfp,
xway_grps, ARRAY_SIZE(xway_grps),
xrx_funcs, ARRAY_SIZE(xrx_funcs),
xway_exin_pin_map, 6},
/* xway ase series */
{XWAY_MAX_PIN, ase_mfp,
ase_grps, ARRAY_SIZE(ase_grps),
ase_funcs, ARRAY_SIZE(ase_funcs),
ase_exin_pins_map, 3},
};
static struct pinctrl_gpio_range xway_gpio_range = {
.name = "XWAY GPIO",
.gc = &xway_chip,
};
static const struct of_device_id xway_match[] = {
{ .compatible = "lantiq,pinctrl-xway", .data = &soc_cfg[0]},
{ .compatible = "lantiq,pinctrl-xr9", .data = &soc_cfg[1]},
{ .compatible = "lantiq,pinctrl-ase", .data = &soc_cfg[2]},
{},
};
MODULE_DEVICE_TABLE(of, xway_match);
static int pinmux_xway_probe(struct platform_device *pdev)
{
const struct of_device_id *match;
const struct pinctrl_xway_soc *xway_soc;
struct resource *res;
int ret, i;
/* get and remap our register range */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
xway_info.membase[0] = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(xway_info.membase[0]))
return PTR_ERR(xway_info.membase[0]);
match = of_match_device(xway_match, &pdev->dev);
if (match)
xway_soc = (const struct pinctrl_xway_soc *) match->data;
else
xway_soc = &soc_cfg[0];
/* find out how many pads we have */
xway_chip.ngpio = xway_soc->pin_count;
/* load our pad descriptors */
xway_info.pads = devm_kzalloc(&pdev->dev,
sizeof(struct pinctrl_pin_desc) * xway_chip.ngpio,
GFP_KERNEL);
if (!xway_info.pads) {
dev_err(&pdev->dev, "Failed to allocate pads\n");
return -ENOMEM;
}
for (i = 0; i < xway_chip.ngpio; i++) {
/* strlen("ioXY") + 1 = 5 */
char *name = devm_kzalloc(&pdev->dev, 5, GFP_KERNEL);
if (!name) {
dev_err(&pdev->dev, "Failed to allocate pad name\n");
return -ENOMEM;
}
snprintf(name, 5, "io%d", i);
xway_info.pads[i].number = GPIO0 + i;
xway_info.pads[i].name = name;
}
xway_pctrl_desc.pins = xway_info.pads;
/* load the gpio chip */
xway_chip.parent = &pdev->dev;
ret = gpiochip_add(&xway_chip);
if (ret) {
dev_err(&pdev->dev, "Failed to register gpio chip\n");
return ret;
}
/* setup the data needed by pinctrl */
xway_pctrl_desc.name = dev_name(&pdev->dev);
xway_pctrl_desc.npins = xway_chip.ngpio;
xway_info.num_pads = xway_chip.ngpio;
xway_info.num_mfp = xway_chip.ngpio;
xway_info.mfp = xway_soc->mfp;
xway_info.grps = xway_soc->grps;
xway_info.num_grps = xway_soc->num_grps;
xway_info.funcs = xway_soc->funcs;
xway_info.num_funcs = xway_soc->num_funcs;
xway_info.exin = xway_soc->exin;
xway_info.num_exin = xway_soc->num_exin;
/* register with the generic lantiq layer */
ret = ltq_pinctrl_register(pdev, &xway_info);
if (ret) {
gpiochip_remove(&xway_chip);
dev_err(&pdev->dev, "Failed to register pinctrl driver\n");
return ret;
}
/* finish with registering the gpio range in pinctrl */
xway_gpio_range.npins = xway_chip.ngpio;
xway_gpio_range.base = xway_chip.base;
pinctrl_add_gpio_range(xway_info.pctrl, &xway_gpio_range);
dev_info(&pdev->dev, "Init done\n");
return 0;
}
static struct platform_driver pinmux_xway_driver = {
.probe = pinmux_xway_probe,
.driver = {
.name = "pinctrl-xway",
.of_match_table = xway_match,
},
};
static int __init pinmux_xway_init(void)
{
return platform_driver_register(&pinmux_xway_driver);
}
core_initcall_sync(pinmux_xway_init);
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