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![Pramod Gurav](/assets/img/avatar_default.png)
This patch removes call to gpiochip_remove_pin_ranges() from platform_driver remove function as it will anway be called by gpiochip_remove(). CC: Sonic Zhang <sonic.zhang@analog.com> CC: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Pramod Gurav <pramod.gurav@smartplayin.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
1146 lines
29 KiB
C
1146 lines
29 KiB
C
/*
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* Pinctrl Driver for ADI GPIO2 controller
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*
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* Copyright 2007-2013 Analog Devices Inc.
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*
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* Licensed under the GPLv2 or later
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*/
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#include <linux/bitops.h>
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#include <linux/delay.h>
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#include <linux/module.h>
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#include <linux/err.h>
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#include <linux/debugfs.h>
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#include <linux/seq_file.h>
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#include <linux/irq.h>
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#include <linux/platform_data/pinctrl-adi2.h>
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#include <linux/irqdomain.h>
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#include <linux/irqchip/chained_irq.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/consumer.h>
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#include <linux/pinctrl/machine.h>
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#include <linux/syscore_ops.h>
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#include <linux/gpio.h>
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#include <asm/portmux.h>
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#include "pinctrl-adi2.h"
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#include "core.h"
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/*
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According to the BF54x HRM, pint means "pin interrupt".
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http://www.analog.com/static/imported-files/processor_manuals/ADSP-BF54x_hwr_rev1.2.pdf
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ADSP-BF54x processor Blackfin processors have four SIC interrupt chan-
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nels dedicated to pin interrupt purposes. These channels are managed by
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four hardware blocks, called PINT0, PINT1, PINT2, and PINT3. Every PINTx
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block can sense to up to 32 pins. While PINT0 and PINT1 can sense the
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pins of port A and port B, PINT2 and PINT3 manage all the pins from port
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C to port J as shown in Figure 9-2.
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n BF54x HRM:
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The ten GPIO ports are subdivided into 8-bit half ports, resulting in lower and
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upper half 8-bit units. The PINTx_ASSIGN registers control the 8-bit multi-
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plexers shown in Figure 9-3. Lower half units of eight pins can be
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forwarded to either byte 0 or byte 2 of either associated PINTx block.
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Upper half units can be forwarded to either byte 1 or byte 3 of the pin
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interrupt blocks, without further restrictions.
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All MMR registers in the pin interrupt module are 32 bits wide. To simply the
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mapping logic, this driver only maps a 16-bit gpio port to the upper or lower
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16 bits of a PINTx block. You can find the Figure 9-3 on page 583.
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Each IRQ domain is binding to a GPIO bank device. 2 GPIO bank devices can map
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to one PINT device. Two in "struct gpio_pint" are used to ease the PINT
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interrupt handler.
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The GPIO bank mapping to the lower 16 bits of the PINT device set its IRQ
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domain pointer in domain[0]. The IRQ domain pointer of the other bank is set
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to domain[1]. PINT interrupt handler adi_gpio_handle_pint_irq() finds out
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the current domain pointer according to whether the interrupt request mask
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is in lower 16 bits (domain[0]) or upper 16bits (domain[1]).
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A PINT device is not part of a GPIO port device in Blackfin. Multiple GPIO
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port devices can be mapped to the same PINT device.
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*/
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static LIST_HEAD(adi_pint_list);
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static LIST_HEAD(adi_gpio_port_list);
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#define DRIVER_NAME "pinctrl-adi2"
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#define PINT_HI_OFFSET 16
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/**
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* struct gpio_port_saved - GPIO port registers that should be saved between
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* power suspend and resume operations.
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*
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* @fer: PORTx_FER register
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* @data: PORTx_DATA register
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* @dir: PORTx_DIR register
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* @inen: PORTx_INEN register
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* @mux: PORTx_MUX register
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*/
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struct gpio_port_saved {
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u16 fer;
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u16 data;
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u16 dir;
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u16 inen;
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u32 mux;
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};
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/*
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* struct gpio_pint_saved - PINT registers saved in PM operations
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*
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* @assign: ASSIGN register
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* @edge_set: EDGE_SET register
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* @invert_set: INVERT_SET register
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*/
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struct gpio_pint_saved {
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u32 assign;
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u32 edge_set;
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u32 invert_set;
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};
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/**
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* struct gpio_pint - Pin interrupt controller device. Multiple ADI GPIO
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* banks can be mapped into one Pin interrupt controller.
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*
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* @node: All gpio_pint instances are added to a global list.
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* @base: PINT device register base address
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* @irq: IRQ of the PINT device, it is the parent IRQ of all
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* GPIO IRQs mapping to this device.
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* @domain: [0] irq domain of the gpio port, whose hardware interrupts are
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* mapping to the low 16-bit of the pint registers.
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* [1] irq domain of the gpio port, whose hardware interrupts are
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* mapping to the high 16-bit of the pint registers.
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* @regs: address pointer to the PINT device
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* @map_count: No more than 2 GPIO banks can be mapped to this PINT device.
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* @lock: This lock make sure the irq_chip operations to one PINT device
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* for different GPIO interrrupts are atomic.
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* @pint_map_port: Set up the mapping between one PINT device and
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* multiple GPIO banks.
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*/
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struct gpio_pint {
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struct list_head node;
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void __iomem *base;
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int irq;
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struct irq_domain *domain[2];
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struct gpio_pint_regs *regs;
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struct gpio_pint_saved saved_data;
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int map_count;
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spinlock_t lock;
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int (*pint_map_port)(struct gpio_pint *pint, bool assign,
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u8 map, struct irq_domain *domain);
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};
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/**
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* ADI pin controller
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*
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* @dev: a pointer back to containing device
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* @pctl: the pinctrl device
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* @soc: SoC data for this specific chip
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*/
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struct adi_pinctrl {
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struct device *dev;
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struct pinctrl_dev *pctl;
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const struct adi_pinctrl_soc_data *soc;
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};
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/**
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* struct gpio_port - GPIO bank device. Multiple ADI GPIO banks can be mapped
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* into one pin interrupt controller.
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*
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* @node: All gpio_port instances are added to a list.
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* @base: GPIO bank device register base address
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* @irq_base: base IRQ of the GPIO bank device
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* @width: PIN number of the GPIO bank device
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* @regs: address pointer to the GPIO bank device
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* @saved_data: registers that should be saved between PM operations.
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* @dev: device structure of this GPIO bank
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* @pint: GPIO PINT device that this GPIO bank mapped to
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* @pint_map: GIOP bank mapping code in PINT device
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* @pint_assign: The 32-bit PINT registers can be divided into 2 parts. A
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* GPIO bank can be mapped into either low 16 bits[0] or high 16
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* bits[1] of each PINT register.
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* @lock: This lock make sure the irq_chip operations to one PINT device
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* for different GPIO interrrupts are atomic.
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* @chip: abstract a GPIO controller
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* @domain: The irq domain owned by the GPIO port.
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* @rsvmap: Reservation map array for each pin in the GPIO bank
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*/
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struct gpio_port {
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struct list_head node;
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void __iomem *base;
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int irq_base;
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unsigned int width;
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struct gpio_port_t *regs;
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struct gpio_port_saved saved_data;
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struct device *dev;
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struct gpio_pint *pint;
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u8 pint_map;
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bool pint_assign;
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spinlock_t lock;
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struct gpio_chip chip;
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struct irq_domain *domain;
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};
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static inline u8 pin_to_offset(struct pinctrl_gpio_range *range, unsigned pin)
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{
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return pin - range->pin_base;
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}
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static inline u32 hwirq_to_pintbit(struct gpio_port *port, int hwirq)
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{
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return port->pint_assign ? BIT(hwirq) << PINT_HI_OFFSET : BIT(hwirq);
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}
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static struct gpio_pint *find_gpio_pint(unsigned id)
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{
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struct gpio_pint *pint;
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int i = 0;
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list_for_each_entry(pint, &adi_pint_list, node) {
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if (id == i)
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return pint;
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i++;
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}
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return NULL;
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}
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static inline void port_setup(struct gpio_port *port, unsigned offset,
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bool use_for_gpio)
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{
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struct gpio_port_t *regs = port->regs;
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if (use_for_gpio)
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writew(readw(®s->port_fer) & ~BIT(offset),
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®s->port_fer);
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else
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writew(readw(®s->port_fer) | BIT(offset), ®s->port_fer);
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}
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static inline void portmux_setup(struct gpio_port *port, unsigned offset,
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unsigned short function)
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{
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struct gpio_port_t *regs = port->regs;
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u32 pmux;
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pmux = readl(®s->port_mux);
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/* The function field of each pin has 2 consecutive bits in
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* the mux register.
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*/
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pmux &= ~(0x3 << (2 * offset));
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pmux |= (function & 0x3) << (2 * offset);
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writel(pmux, ®s->port_mux);
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}
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static inline u16 get_portmux(struct gpio_port *port, unsigned offset)
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{
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struct gpio_port_t *regs = port->regs;
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u32 pmux = readl(®s->port_mux);
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/* The function field of each pin has 2 consecutive bits in
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* the mux register.
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*/
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return pmux >> (2 * offset) & 0x3;
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}
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static void adi_gpio_ack_irq(struct irq_data *d)
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{
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unsigned long flags;
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struct gpio_port *port = irq_data_get_irq_chip_data(d);
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struct gpio_pint_regs *regs = port->pint->regs;
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unsigned pintbit = hwirq_to_pintbit(port, d->hwirq);
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spin_lock_irqsave(&port->lock, flags);
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spin_lock(&port->pint->lock);
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if (irqd_get_trigger_type(d) == IRQ_TYPE_EDGE_BOTH) {
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if (readl(®s->invert_set) & pintbit)
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writel(pintbit, ®s->invert_clear);
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else
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writel(pintbit, ®s->invert_set);
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}
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writel(pintbit, ®s->request);
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spin_unlock(&port->pint->lock);
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spin_unlock_irqrestore(&port->lock, flags);
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}
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static void adi_gpio_mask_ack_irq(struct irq_data *d)
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{
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unsigned long flags;
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struct gpio_port *port = irq_data_get_irq_chip_data(d);
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struct gpio_pint_regs *regs = port->pint->regs;
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unsigned pintbit = hwirq_to_pintbit(port, d->hwirq);
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spin_lock_irqsave(&port->lock, flags);
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spin_lock(&port->pint->lock);
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if (irqd_get_trigger_type(d) == IRQ_TYPE_EDGE_BOTH) {
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if (readl(®s->invert_set) & pintbit)
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writel(pintbit, ®s->invert_clear);
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else
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writel(pintbit, ®s->invert_set);
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}
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writel(pintbit, ®s->request);
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writel(pintbit, ®s->mask_clear);
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spin_unlock(&port->pint->lock);
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spin_unlock_irqrestore(&port->lock, flags);
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}
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static void adi_gpio_mask_irq(struct irq_data *d)
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{
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unsigned long flags;
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struct gpio_port *port = irq_data_get_irq_chip_data(d);
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struct gpio_pint_regs *regs = port->pint->regs;
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spin_lock_irqsave(&port->lock, flags);
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spin_lock(&port->pint->lock);
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writel(hwirq_to_pintbit(port, d->hwirq), ®s->mask_clear);
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spin_unlock(&port->pint->lock);
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spin_unlock_irqrestore(&port->lock, flags);
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}
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static void adi_gpio_unmask_irq(struct irq_data *d)
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{
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unsigned long flags;
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struct gpio_port *port = irq_data_get_irq_chip_data(d);
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struct gpio_pint_regs *regs = port->pint->regs;
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spin_lock_irqsave(&port->lock, flags);
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spin_lock(&port->pint->lock);
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writel(hwirq_to_pintbit(port, d->hwirq), ®s->mask_set);
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spin_unlock(&port->pint->lock);
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spin_unlock_irqrestore(&port->lock, flags);
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}
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static unsigned int adi_gpio_irq_startup(struct irq_data *d)
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{
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unsigned long flags;
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struct gpio_port *port = irq_data_get_irq_chip_data(d);
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struct gpio_pint_regs *regs;
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if (!port) {
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pr_err("GPIO IRQ %d :Not exist\n", d->irq);
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/* FIXME: negative return code will be ignored */
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return -ENODEV;
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}
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regs = port->pint->regs;
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spin_lock_irqsave(&port->lock, flags);
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spin_lock(&port->pint->lock);
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port_setup(port, d->hwirq, true);
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writew(BIT(d->hwirq), &port->regs->dir_clear);
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writew(readw(&port->regs->inen) | BIT(d->hwirq), &port->regs->inen);
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writel(hwirq_to_pintbit(port, d->hwirq), ®s->mask_set);
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spin_unlock(&port->pint->lock);
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spin_unlock_irqrestore(&port->lock, flags);
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return 0;
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}
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static void adi_gpio_irq_shutdown(struct irq_data *d)
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{
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unsigned long flags;
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struct gpio_port *port = irq_data_get_irq_chip_data(d);
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struct gpio_pint_regs *regs = port->pint->regs;
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spin_lock_irqsave(&port->lock, flags);
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spin_lock(&port->pint->lock);
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writel(hwirq_to_pintbit(port, d->hwirq), ®s->mask_clear);
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spin_unlock(&port->pint->lock);
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spin_unlock_irqrestore(&port->lock, flags);
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}
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static int adi_gpio_irq_type(struct irq_data *d, unsigned int type)
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{
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unsigned long flags;
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struct gpio_port *port = irq_data_get_irq_chip_data(d);
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struct gpio_pint_regs *pint_regs;
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unsigned pintmask;
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unsigned int irq = d->irq;
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int ret = 0;
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char buf[16];
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if (!port) {
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pr_err("GPIO IRQ %d :Not exist\n", d->irq);
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return -ENODEV;
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}
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pint_regs = port->pint->regs;
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pintmask = hwirq_to_pintbit(port, d->hwirq);
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spin_lock_irqsave(&port->lock, flags);
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spin_lock(&port->pint->lock);
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/* In case of interrupt autodetect, set irq type to edge sensitive. */
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if (type == IRQ_TYPE_PROBE)
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type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
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if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING |
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IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) {
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snprintf(buf, 16, "gpio-irq%u", irq);
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port_setup(port, d->hwirq, true);
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} else
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goto out;
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/* The GPIO interrupt is triggered only when its input value
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* transfer from 0 to 1. So, invert the input value if the
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* irq type is low or falling
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*/
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if ((type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_LOW)))
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writel(pintmask, &pint_regs->invert_set);
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else
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writel(pintmask, &pint_regs->invert_clear);
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/* In edge sensitive case, if the input value of the requested irq
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* is already 1, invert it.
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*/
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if ((type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH) {
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if (gpio_get_value(port->chip.base + d->hwirq))
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writel(pintmask, &pint_regs->invert_set);
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else
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writel(pintmask, &pint_regs->invert_clear);
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}
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if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) {
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writel(pintmask, &pint_regs->edge_set);
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__irq_set_handler_locked(irq, handle_edge_irq);
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} else {
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writel(pintmask, &pint_regs->edge_clear);
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__irq_set_handler_locked(irq, handle_level_irq);
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}
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out:
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spin_unlock(&port->pint->lock);
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spin_unlock_irqrestore(&port->lock, flags);
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return ret;
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}
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#ifdef CONFIG_PM
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static int adi_gpio_set_wake(struct irq_data *d, unsigned int state)
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{
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struct gpio_port *port = irq_data_get_irq_chip_data(d);
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if (!port || !port->pint || port->pint->irq != d->irq)
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return -EINVAL;
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#ifndef SEC_GCTL
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adi_internal_set_wake(port->pint->irq, state);
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#endif
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return 0;
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}
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static int adi_pint_suspend(void)
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{
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struct gpio_pint *pint;
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list_for_each_entry(pint, &adi_pint_list, node) {
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writel(0xffffffff, &pint->regs->mask_clear);
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pint->saved_data.assign = readl(&pint->regs->assign);
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pint->saved_data.edge_set = readl(&pint->regs->edge_set);
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pint->saved_data.invert_set = readl(&pint->regs->invert_set);
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}
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return 0;
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}
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static void adi_pint_resume(void)
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{
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struct gpio_pint *pint;
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list_for_each_entry(pint, &adi_pint_list, node) {
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writel(pint->saved_data.assign, &pint->regs->assign);
|
|
writel(pint->saved_data.edge_set, &pint->regs->edge_set);
|
|
writel(pint->saved_data.invert_set, &pint->regs->invert_set);
|
|
}
|
|
}
|
|
|
|
static int adi_gpio_suspend(void)
|
|
{
|
|
struct gpio_port *port;
|
|
|
|
list_for_each_entry(port, &adi_gpio_port_list, node) {
|
|
port->saved_data.fer = readw(&port->regs->port_fer);
|
|
port->saved_data.mux = readl(&port->regs->port_mux);
|
|
port->saved_data.data = readw(&port->regs->data);
|
|
port->saved_data.inen = readw(&port->regs->inen);
|
|
port->saved_data.dir = readw(&port->regs->dir_set);
|
|
}
|
|
|
|
return adi_pint_suspend();
|
|
}
|
|
|
|
static void adi_gpio_resume(void)
|
|
{
|
|
struct gpio_port *port;
|
|
|
|
adi_pint_resume();
|
|
|
|
list_for_each_entry(port, &adi_gpio_port_list, node) {
|
|
writel(port->saved_data.mux, &port->regs->port_mux);
|
|
writew(port->saved_data.fer, &port->regs->port_fer);
|
|
writew(port->saved_data.inen, &port->regs->inen);
|
|
writew(port->saved_data.data & port->saved_data.dir,
|
|
&port->regs->data_set);
|
|
writew(port->saved_data.dir, &port->regs->dir_set);
|
|
}
|
|
|
|
}
|
|
|
|
static struct syscore_ops gpio_pm_syscore_ops = {
|
|
.suspend = adi_gpio_suspend,
|
|
.resume = adi_gpio_resume,
|
|
};
|
|
#else /* CONFIG_PM */
|
|
#define adi_gpio_set_wake NULL
|
|
#endif /* CONFIG_PM */
|
|
|
|
#ifdef CONFIG_IRQ_PREFLOW_FASTEOI
|
|
static inline void preflow_handler(struct irq_desc *desc)
|
|
{
|
|
if (desc->preflow_handler)
|
|
desc->preflow_handler(&desc->irq_data);
|
|
}
|
|
#else
|
|
static inline void preflow_handler(struct irq_desc *desc) { }
|
|
#endif
|
|
|
|
static void adi_gpio_handle_pint_irq(unsigned int inta_irq,
|
|
struct irq_desc *desc)
|
|
{
|
|
u32 request;
|
|
u32 level_mask, hwirq;
|
|
bool umask = false;
|
|
struct gpio_pint *pint = irq_desc_get_handler_data(desc);
|
|
struct irq_chip *chip = irq_desc_get_chip(desc);
|
|
struct gpio_pint_regs *regs = pint->regs;
|
|
struct irq_domain *domain;
|
|
|
|
preflow_handler(desc);
|
|
chained_irq_enter(chip, desc);
|
|
|
|
request = readl(®s->request);
|
|
level_mask = readl(®s->edge_set) & request;
|
|
|
|
hwirq = 0;
|
|
domain = pint->domain[0];
|
|
while (request) {
|
|
/* domain pointer need to be changed only once at IRQ 16 when
|
|
* we go through IRQ requests from bit 0 to bit 31.
|
|
*/
|
|
if (hwirq == PINT_HI_OFFSET)
|
|
domain = pint->domain[1];
|
|
|
|
if (request & 1) {
|
|
if (level_mask & BIT(hwirq)) {
|
|
umask = true;
|
|
chained_irq_exit(chip, desc);
|
|
}
|
|
generic_handle_irq(irq_find_mapping(domain,
|
|
hwirq % PINT_HI_OFFSET));
|
|
}
|
|
|
|
hwirq++;
|
|
request >>= 1;
|
|
}
|
|
|
|
if (!umask)
|
|
chained_irq_exit(chip, desc);
|
|
}
|
|
|
|
static struct irq_chip adi_gpio_irqchip = {
|
|
.name = "GPIO",
|
|
.irq_ack = adi_gpio_ack_irq,
|
|
.irq_mask = adi_gpio_mask_irq,
|
|
.irq_mask_ack = adi_gpio_mask_ack_irq,
|
|
.irq_unmask = adi_gpio_unmask_irq,
|
|
.irq_disable = adi_gpio_mask_irq,
|
|
.irq_enable = adi_gpio_unmask_irq,
|
|
.irq_set_type = adi_gpio_irq_type,
|
|
.irq_startup = adi_gpio_irq_startup,
|
|
.irq_shutdown = adi_gpio_irq_shutdown,
|
|
.irq_set_wake = adi_gpio_set_wake,
|
|
};
|
|
|
|
static int adi_get_groups_count(struct pinctrl_dev *pctldev)
|
|
{
|
|
struct adi_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
return pinctrl->soc->ngroups;
|
|
}
|
|
|
|
static const char *adi_get_group_name(struct pinctrl_dev *pctldev,
|
|
unsigned selector)
|
|
{
|
|
struct adi_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
return pinctrl->soc->groups[selector].name;
|
|
}
|
|
|
|
static int adi_get_group_pins(struct pinctrl_dev *pctldev, unsigned selector,
|
|
const unsigned **pins,
|
|
unsigned *num_pins)
|
|
{
|
|
struct adi_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
*pins = pinctrl->soc->groups[selector].pins;
|
|
*num_pins = pinctrl->soc->groups[selector].num;
|
|
return 0;
|
|
}
|
|
|
|
static struct pinctrl_ops adi_pctrl_ops = {
|
|
.get_groups_count = adi_get_groups_count,
|
|
.get_group_name = adi_get_group_name,
|
|
.get_group_pins = adi_get_group_pins,
|
|
};
|
|
|
|
static int adi_pinmux_set(struct pinctrl_dev *pctldev, unsigned func_id,
|
|
unsigned group_id)
|
|
{
|
|
struct adi_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctldev);
|
|
struct gpio_port *port;
|
|
struct pinctrl_gpio_range *range;
|
|
unsigned long flags;
|
|
unsigned short *mux, pin;
|
|
|
|
mux = (unsigned short *)pinctrl->soc->groups[group_id].mux;
|
|
|
|
while (*mux) {
|
|
pin = P_IDENT(*mux);
|
|
|
|
range = pinctrl_find_gpio_range_from_pin(pctldev, pin);
|
|
if (range == NULL) /* should not happen */
|
|
return -ENODEV;
|
|
|
|
port = container_of(range->gc, struct gpio_port, chip);
|
|
|
|
spin_lock_irqsave(&port->lock, flags);
|
|
|
|
portmux_setup(port, pin_to_offset(range, pin),
|
|
P_FUNCT2MUX(*mux));
|
|
port_setup(port, pin_to_offset(range, pin), false);
|
|
mux++;
|
|
|
|
spin_unlock_irqrestore(&port->lock, flags);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int adi_pinmux_get_funcs_count(struct pinctrl_dev *pctldev)
|
|
{
|
|
struct adi_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
return pinctrl->soc->nfunctions;
|
|
}
|
|
|
|
static const char *adi_pinmux_get_func_name(struct pinctrl_dev *pctldev,
|
|
unsigned selector)
|
|
{
|
|
struct adi_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
return pinctrl->soc->functions[selector].name;
|
|
}
|
|
|
|
static int adi_pinmux_get_groups(struct pinctrl_dev *pctldev, unsigned selector,
|
|
const char * const **groups,
|
|
unsigned * const num_groups)
|
|
{
|
|
struct adi_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
*groups = pinctrl->soc->functions[selector].groups;
|
|
*num_groups = pinctrl->soc->functions[selector].num_groups;
|
|
return 0;
|
|
}
|
|
|
|
static int adi_pinmux_request_gpio(struct pinctrl_dev *pctldev,
|
|
struct pinctrl_gpio_range *range, unsigned pin)
|
|
{
|
|
struct gpio_port *port;
|
|
unsigned long flags;
|
|
u8 offset;
|
|
|
|
port = container_of(range->gc, struct gpio_port, chip);
|
|
offset = pin_to_offset(range, pin);
|
|
|
|
spin_lock_irqsave(&port->lock, flags);
|
|
|
|
port_setup(port, offset, true);
|
|
|
|
spin_unlock_irqrestore(&port->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct pinmux_ops adi_pinmux_ops = {
|
|
.set_mux = adi_pinmux_set,
|
|
.get_functions_count = adi_pinmux_get_funcs_count,
|
|
.get_function_name = adi_pinmux_get_func_name,
|
|
.get_function_groups = adi_pinmux_get_groups,
|
|
.gpio_request_enable = adi_pinmux_request_gpio,
|
|
};
|
|
|
|
|
|
static struct pinctrl_desc adi_pinmux_desc = {
|
|
.name = DRIVER_NAME,
|
|
.pctlops = &adi_pctrl_ops,
|
|
.pmxops = &adi_pinmux_ops,
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|
|
static int adi_gpio_request(struct gpio_chip *chip, unsigned offset)
|
|
{
|
|
return pinctrl_request_gpio(chip->base + offset);
|
|
}
|
|
|
|
static void adi_gpio_free(struct gpio_chip *chip, unsigned offset)
|
|
{
|
|
pinctrl_free_gpio(chip->base + offset);
|
|
}
|
|
|
|
static int adi_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
|
|
{
|
|
struct gpio_port *port;
|
|
unsigned long flags;
|
|
|
|
port = container_of(chip, struct gpio_port, chip);
|
|
|
|
spin_lock_irqsave(&port->lock, flags);
|
|
|
|
writew(BIT(offset), &port->regs->dir_clear);
|
|
writew(readw(&port->regs->inen) | BIT(offset), &port->regs->inen);
|
|
|
|
spin_unlock_irqrestore(&port->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void adi_gpio_set_value(struct gpio_chip *chip, unsigned offset,
|
|
int value)
|
|
{
|
|
struct gpio_port *port = container_of(chip, struct gpio_port, chip);
|
|
struct gpio_port_t *regs = port->regs;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&port->lock, flags);
|
|
|
|
if (value)
|
|
writew(BIT(offset), ®s->data_set);
|
|
else
|
|
writew(BIT(offset), ®s->data_clear);
|
|
|
|
spin_unlock_irqrestore(&port->lock, flags);
|
|
}
|
|
|
|
static int adi_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
|
|
int value)
|
|
{
|
|
struct gpio_port *port = container_of(chip, struct gpio_port, chip);
|
|
struct gpio_port_t *regs = port->regs;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&port->lock, flags);
|
|
|
|
writew(readw(®s->inen) & ~BIT(offset), ®s->inen);
|
|
if (value)
|
|
writew(BIT(offset), ®s->data_set);
|
|
else
|
|
writew(BIT(offset), ®s->data_clear);
|
|
writew(BIT(offset), ®s->dir_set);
|
|
|
|
spin_unlock_irqrestore(&port->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int adi_gpio_get_value(struct gpio_chip *chip, unsigned offset)
|
|
{
|
|
struct gpio_port *port = container_of(chip, struct gpio_port, chip);
|
|
struct gpio_port_t *regs = port->regs;
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
spin_lock_irqsave(&port->lock, flags);
|
|
|
|
ret = !!(readw(®s->data) & BIT(offset));
|
|
|
|
spin_unlock_irqrestore(&port->lock, flags);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int adi_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
|
|
{
|
|
struct gpio_port *port = container_of(chip, struct gpio_port, chip);
|
|
|
|
if (port->irq_base >= 0)
|
|
return irq_find_mapping(port->domain, offset);
|
|
else
|
|
return irq_create_mapping(port->domain, offset);
|
|
}
|
|
|
|
static int adi_pint_map_port(struct gpio_pint *pint, bool assign, u8 map,
|
|
struct irq_domain *domain)
|
|
{
|
|
struct gpio_pint_regs *regs = pint->regs;
|
|
u32 map_mask;
|
|
|
|
if (pint->map_count > 1)
|
|
return -EINVAL;
|
|
|
|
pint->map_count++;
|
|
|
|
/* The map_mask of each gpio port is a 16-bit duplicate
|
|
* of the 8-bit map. It can be set to either high 16 bits or low
|
|
* 16 bits of the pint assignment register.
|
|
*/
|
|
map_mask = (map << 8) | map;
|
|
if (assign) {
|
|
map_mask <<= PINT_HI_OFFSET;
|
|
writel((readl(®s->assign) & 0xFFFF) | map_mask,
|
|
®s->assign);
|
|
} else
|
|
writel((readl(®s->assign) & 0xFFFF0000) | map_mask,
|
|
®s->assign);
|
|
|
|
pint->domain[assign] = domain;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int adi_gpio_pint_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct resource *res;
|
|
struct gpio_pint *pint;
|
|
|
|
pint = devm_kzalloc(dev, sizeof(struct gpio_pint), GFP_KERNEL);
|
|
if (!pint) {
|
|
dev_err(dev, "Memory alloc failed\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
pint->base = devm_ioremap_resource(dev, res);
|
|
if (IS_ERR(pint->base))
|
|
return PTR_ERR(pint->base);
|
|
|
|
pint->regs = (struct gpio_pint_regs *)pint->base;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
|
|
if (!res) {
|
|
dev_err(dev, "Invalid IRQ resource\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
spin_lock_init(&pint->lock);
|
|
|
|
pint->irq = res->start;
|
|
pint->pint_map_port = adi_pint_map_port;
|
|
platform_set_drvdata(pdev, pint);
|
|
|
|
irq_set_chained_handler(pint->irq, adi_gpio_handle_pint_irq);
|
|
irq_set_handler_data(pint->irq, pint);
|
|
|
|
list_add_tail(&pint->node, &adi_pint_list);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int adi_gpio_pint_remove(struct platform_device *pdev)
|
|
{
|
|
struct gpio_pint *pint = platform_get_drvdata(pdev);
|
|
|
|
list_del(&pint->node);
|
|
irq_set_handler(pint->irq, handle_simple_irq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int adi_gpio_irq_map(struct irq_domain *d, unsigned int irq,
|
|
irq_hw_number_t hwirq)
|
|
{
|
|
struct gpio_port *port = d->host_data;
|
|
|
|
if (!port)
|
|
return -EINVAL;
|
|
|
|
irq_set_chip_data(irq, port);
|
|
irq_set_chip_and_handler(irq, &adi_gpio_irqchip,
|
|
handle_level_irq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct irq_domain_ops adi_gpio_irq_domain_ops = {
|
|
.map = adi_gpio_irq_map,
|
|
.xlate = irq_domain_xlate_onecell,
|
|
};
|
|
|
|
static int adi_gpio_init_int(struct gpio_port *port)
|
|
{
|
|
struct device_node *node = port->dev->of_node;
|
|
struct gpio_pint *pint = port->pint;
|
|
int ret;
|
|
|
|
port->domain = irq_domain_add_linear(node, port->width,
|
|
&adi_gpio_irq_domain_ops, port);
|
|
if (!port->domain) {
|
|
dev_err(port->dev, "Failed to create irqdomain\n");
|
|
return -ENOSYS;
|
|
}
|
|
|
|
/* According to BF54x and BF60x HRM, pin interrupt devices are not
|
|
* part of the GPIO port device. in GPIO interrupt mode, the GPIO
|
|
* pins of multiple port devices can be routed into one pin interrupt
|
|
* device. The mapping can be configured by setting pint assignment
|
|
* register with the mapping value of different GPIO port. This is
|
|
* done via function pint_map_port().
|
|
*/
|
|
ret = pint->pint_map_port(port->pint, port->pint_assign,
|
|
port->pint_map, port->domain);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (port->irq_base >= 0) {
|
|
ret = irq_create_strict_mappings(port->domain, port->irq_base,
|
|
0, port->width);
|
|
if (ret) {
|
|
dev_err(port->dev, "Couldn't associate to domain\n");
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define DEVNAME_SIZE 16
|
|
|
|
static int adi_gpio_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
const struct adi_pinctrl_gpio_platform_data *pdata;
|
|
struct resource *res;
|
|
struct gpio_port *port;
|
|
char pinctrl_devname[DEVNAME_SIZE];
|
|
static int gpio;
|
|
int ret = 0;
|
|
|
|
pdata = dev->platform_data;
|
|
if (!pdata)
|
|
return -EINVAL;
|
|
|
|
port = devm_kzalloc(dev, sizeof(struct gpio_port), GFP_KERNEL);
|
|
if (!port) {
|
|
dev_err(dev, "Memory alloc failed\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
port->base = devm_ioremap_resource(dev, res);
|
|
if (IS_ERR(port->base))
|
|
return PTR_ERR(port->base);
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
|
|
if (!res)
|
|
port->irq_base = -1;
|
|
else
|
|
port->irq_base = res->start;
|
|
|
|
port->width = pdata->port_width;
|
|
port->dev = dev;
|
|
port->regs = (struct gpio_port_t *)port->base;
|
|
port->pint_assign = pdata->pint_assign;
|
|
port->pint_map = pdata->pint_map;
|
|
|
|
port->pint = find_gpio_pint(pdata->pint_id);
|
|
if (port->pint) {
|
|
ret = adi_gpio_init_int(port);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
spin_lock_init(&port->lock);
|
|
|
|
platform_set_drvdata(pdev, port);
|
|
|
|
port->chip.label = "adi-gpio";
|
|
port->chip.direction_input = adi_gpio_direction_input;
|
|
port->chip.get = adi_gpio_get_value;
|
|
port->chip.direction_output = adi_gpio_direction_output;
|
|
port->chip.set = adi_gpio_set_value;
|
|
port->chip.request = adi_gpio_request;
|
|
port->chip.free = adi_gpio_free;
|
|
port->chip.to_irq = adi_gpio_to_irq;
|
|
if (pdata->port_gpio_base > 0)
|
|
port->chip.base = pdata->port_gpio_base;
|
|
else
|
|
port->chip.base = gpio;
|
|
port->chip.ngpio = port->width;
|
|
gpio = port->chip.base + port->width;
|
|
|
|
ret = gpiochip_add(&port->chip);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Fail to add GPIO chip.\n");
|
|
goto out_remove_domain;
|
|
}
|
|
|
|
/* Add gpio pin range */
|
|
snprintf(pinctrl_devname, DEVNAME_SIZE, "pinctrl-adi2.%d",
|
|
pdata->pinctrl_id);
|
|
pinctrl_devname[DEVNAME_SIZE - 1] = 0;
|
|
ret = gpiochip_add_pin_range(&port->chip, pinctrl_devname,
|
|
0, pdata->port_pin_base, port->width);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Fail to add pin range to %s.\n",
|
|
pinctrl_devname);
|
|
goto out_remove_gpiochip;
|
|
}
|
|
|
|
list_add_tail(&port->node, &adi_gpio_port_list);
|
|
|
|
return 0;
|
|
|
|
out_remove_gpiochip:
|
|
gpiochip_remove(&port->chip);
|
|
out_remove_domain:
|
|
if (port->pint)
|
|
irq_domain_remove(port->domain);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int adi_gpio_remove(struct platform_device *pdev)
|
|
{
|
|
struct gpio_port *port = platform_get_drvdata(pdev);
|
|
u8 offset;
|
|
|
|
list_del(&port->node);
|
|
gpiochip_remove(&port->chip);
|
|
if (port->pint) {
|
|
for (offset = 0; offset < port->width; offset++)
|
|
irq_dispose_mapping(irq_find_mapping(port->domain,
|
|
offset));
|
|
irq_domain_remove(port->domain);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int adi_pinctrl_probe(struct platform_device *pdev)
|
|
{
|
|
struct adi_pinctrl *pinctrl;
|
|
|
|
pinctrl = devm_kzalloc(&pdev->dev, sizeof(*pinctrl), GFP_KERNEL);
|
|
if (!pinctrl)
|
|
return -ENOMEM;
|
|
|
|
pinctrl->dev = &pdev->dev;
|
|
|
|
adi_pinctrl_soc_init(&pinctrl->soc);
|
|
|
|
adi_pinmux_desc.pins = pinctrl->soc->pins;
|
|
adi_pinmux_desc.npins = pinctrl->soc->npins;
|
|
|
|
/* Now register the pin controller and all pins it handles */
|
|
pinctrl->pctl = pinctrl_register(&adi_pinmux_desc, &pdev->dev, pinctrl);
|
|
if (!pinctrl->pctl) {
|
|
dev_err(&pdev->dev, "could not register pinctrl ADI2 driver\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, pinctrl);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int adi_pinctrl_remove(struct platform_device *pdev)
|
|
{
|
|
struct adi_pinctrl *pinctrl = platform_get_drvdata(pdev);
|
|
|
|
pinctrl_unregister(pinctrl->pctl);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver adi_pinctrl_driver = {
|
|
.probe = adi_pinctrl_probe,
|
|
.remove = adi_pinctrl_remove,
|
|
.driver = {
|
|
.name = DRIVER_NAME,
|
|
},
|
|
};
|
|
|
|
static struct platform_driver adi_gpio_pint_driver = {
|
|
.probe = adi_gpio_pint_probe,
|
|
.remove = adi_gpio_pint_remove,
|
|
.driver = {
|
|
.name = "adi-gpio-pint",
|
|
},
|
|
};
|
|
|
|
static struct platform_driver adi_gpio_driver = {
|
|
.probe = adi_gpio_probe,
|
|
.remove = adi_gpio_remove,
|
|
.driver = {
|
|
.name = "adi-gpio",
|
|
},
|
|
};
|
|
|
|
static int __init adi_pinctrl_setup(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = platform_driver_register(&adi_pinctrl_driver);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = platform_driver_register(&adi_gpio_pint_driver);
|
|
if (ret)
|
|
goto pint_error;
|
|
|
|
ret = platform_driver_register(&adi_gpio_driver);
|
|
if (ret)
|
|
goto gpio_error;
|
|
|
|
#ifdef CONFIG_PM
|
|
register_syscore_ops(&gpio_pm_syscore_ops);
|
|
#endif
|
|
return ret;
|
|
gpio_error:
|
|
platform_driver_unregister(&adi_gpio_pint_driver);
|
|
pint_error:
|
|
platform_driver_unregister(&adi_pinctrl_driver);
|
|
|
|
return ret;
|
|
}
|
|
arch_initcall(adi_pinctrl_setup);
|
|
|
|
MODULE_AUTHOR("Sonic Zhang <sonic.zhang@analog.com>");
|
|
MODULE_DESCRIPTION("ADI gpio2 pin control driver");
|
|
MODULE_LICENSE("GPL");
|