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linux-sg2042/drivers/pinctrl/pinctrl-xway.c

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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_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, NONE),
MFP_XWAY(GPIO3, GPIO, CGU, NONE, PCI),
MFP_XWAY(GPIO4, GPIO, STP, NONE, ASC),
MFP_XWAY(GPIO5, GPIO, STP, NONE, NONE),
MFP_XWAY(GPIO6, GPIO, STP, GPT, ASC),
MFP_XWAY(GPIO7, GPIO, CGU, PCI, NONE),
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, NONE, SIN),
MFP_XWAY(GPIO45, GPIO, NONE, NONE, SIN),
MFP_XWAY(GPIO46, GPIO, NONE, NONE, EXIN),
MFP_XWAY(GPIO47, GPIO, NONE, NONE, 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_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),
};
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_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)},
};
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 config)
{
struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctldev);
enum ltq_pinconf_param param = LTQ_PINCONF_UNPACK_PARAM(config);
int arg = LTQ_PINCONF_UNPACK_ARG(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);
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;
}
return 0;
}
int xway_pinconf_group_set(struct pinctrl_dev *pctldev,
unsigned selector,
unsigned long config)
{
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], config);
return ret;
}
static 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->dev);
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->dev);
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->dev);
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->dev);
gpio_setbit(info->membase[0], GPIO_DIR(pin), PORT_PIN(pin));
xway_gpio_set(chip, pin, val);
return 0;
}
static int xway_gpio_req(struct gpio_chip *chip, unsigned offset)
{
int gpio = chip->base + offset;
return pinctrl_request_gpio(gpio);
}
static void xway_gpio_free(struct gpio_chip *chip, unsigned offset)
{
int gpio = chip->base + offset;
pinctrl_free_gpio(gpio);
}
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 = xway_gpio_req,
.free = xway_gpio_free,
.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);
if (!res) {
dev_err(&pdev->dev, "Failed to get resource\n");
return -ENOENT;
}
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.dev = &pdev->dev;
of_gpiochip_add(&xway_chip);
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) {
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",
.owner = THIS_MODULE,
.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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