| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * Coldfire generic GPIO support. |
| * |
| * (C) Copyright 2009, Steven King <sfking@fdwdc.com> |
| */ |
| |
| #ifndef mcfgpio_h |
| #define mcfgpio_h |
| |
| #ifdef CONFIG_GPIOLIB |
| #include <linux/gpio.h> |
| #else |
| |
| int __mcfgpio_get_value(unsigned gpio); |
| void __mcfgpio_set_value(unsigned gpio, int value); |
| int __mcfgpio_direction_input(unsigned gpio); |
| int __mcfgpio_direction_output(unsigned gpio, int value); |
| int __mcfgpio_request(unsigned gpio); |
| void __mcfgpio_free(unsigned gpio); |
| |
| /* our alternate 'gpiolib' functions */ |
| static inline int __gpio_get_value(unsigned gpio) |
| { |
| if (gpio < MCFGPIO_PIN_MAX) |
| return __mcfgpio_get_value(gpio); |
| else |
| return -EINVAL; |
| } |
| |
| static inline void __gpio_set_value(unsigned gpio, int value) |
| { |
| if (gpio < MCFGPIO_PIN_MAX) |
| __mcfgpio_set_value(gpio, value); |
| } |
| |
| static inline int __gpio_to_irq(unsigned gpio) |
| { |
| return -EINVAL; |
| } |
| |
| static inline int gpio_direction_input(unsigned gpio) |
| { |
| if (gpio < MCFGPIO_PIN_MAX) |
| return __mcfgpio_direction_input(gpio); |
| else |
| return -EINVAL; |
| } |
| |
| static inline int gpio_direction_output(unsigned gpio, int value) |
| { |
| if (gpio < MCFGPIO_PIN_MAX) |
| return __mcfgpio_direction_output(gpio, value); |
| else |
| return -EINVAL; |
| } |
| |
| static inline int gpio_request(unsigned gpio, const char *label) |
| { |
| if (gpio < MCFGPIO_PIN_MAX) |
| return __mcfgpio_request(gpio); |
| else |
| return -EINVAL; |
| } |
| |
| static inline void gpio_free(unsigned gpio) |
| { |
| if (gpio < MCFGPIO_PIN_MAX) |
| __mcfgpio_free(gpio); |
| } |
| |
| #endif /* CONFIG_GPIOLIB */ |
| |
| |
| /* |
| * The Freescale Coldfire family is quite varied in how they implement GPIO. |
| * Some parts have 8 bit ports, some have 16bit and some have 32bit; some have |
| * only one port, others have multiple ports; some have a single data latch |
| * for both input and output, others have a separate pin data register to read |
| * input; some require a read-modify-write access to change an output, others |
| * have set and clear registers for some of the outputs; Some have all the |
| * GPIOs in a single control area, others have some GPIOs implemented in |
| * different modules. |
| * |
| * This implementation attempts accommodate the differences while presenting |
| * a generic interface that will optimize to as few instructions as possible. |
| */ |
| #if defined(CONFIG_M5206) || defined(CONFIG_M5206e) || \ |
| defined(CONFIG_M520x) || defined(CONFIG_M523x) || \ |
| defined(CONFIG_M527x) || defined(CONFIG_M528x) || \ |
| defined(CONFIG_M53xx) || defined(CONFIG_M54xx) || \ |
| defined(CONFIG_M5441x) |
| |
| /* These parts have GPIO organized by 8 bit ports */ |
| |
| #define MCFGPIO_PORTTYPE u8 |
| #define MCFGPIO_PORTSIZE 8 |
| #define mcfgpio_read(port) __raw_readb(port) |
| #define mcfgpio_write(data, port) __raw_writeb(data, port) |
| |
| #elif defined(CONFIG_M5307) || defined(CONFIG_M5407) || defined(CONFIG_M5272) |
| |
| /* These parts have GPIO organized by 16 bit ports */ |
| |
| #define MCFGPIO_PORTTYPE u16 |
| #define MCFGPIO_PORTSIZE 16 |
| #define mcfgpio_read(port) __raw_readw(port) |
| #define mcfgpio_write(data, port) __raw_writew(data, port) |
| |
| #elif defined(CONFIG_M5249) || defined(CONFIG_M525x) |
| |
| /* These parts have GPIO organized by 32 bit ports */ |
| |
| #define MCFGPIO_PORTTYPE u32 |
| #define MCFGPIO_PORTSIZE 32 |
| #define mcfgpio_read(port) __raw_readl(port) |
| #define mcfgpio_write(data, port) __raw_writel(data, port) |
| |
| #endif |
| |
| #define mcfgpio_bit(gpio) (1 << ((gpio) % MCFGPIO_PORTSIZE)) |
| #define mcfgpio_port(gpio) ((gpio) / MCFGPIO_PORTSIZE) |
| |
| #if defined(CONFIG_M520x) || defined(CONFIG_M523x) || \ |
| defined(CONFIG_M527x) || defined(CONFIG_M528x) || \ |
| defined(CONFIG_M53xx) || defined(CONFIG_M54xx) || \ |
| defined(CONFIG_M5441x) |
| /* |
| * These parts have an 'Edge' Port module (external interrupt/GPIO) which uses |
| * read-modify-write to change an output and a GPIO module which has separate |
| * set/clr registers to directly change outputs with a single write access. |
| */ |
| #if defined(CONFIG_M528x) |
| /* |
| * The 528x also has GPIOs in other modules (GPT, QADC) which use |
| * read-modify-write as well as those controlled by the EPORT and GPIO modules. |
| */ |
| #define MCFGPIO_SCR_START 40 |
| #elif defined(CONFIGM5441x) |
| /* The m5441x EPORT doesn't have its own GPIO port, uses PORT C */ |
| #define MCFGPIO_SCR_START 0 |
| #else |
| #define MCFGPIO_SCR_START 8 |
| #endif |
| |
| #define MCFGPIO_SETR_PORT(gpio) (MCFGPIO_SETR + \ |
| mcfgpio_port(gpio - MCFGPIO_SCR_START)) |
| |
| #define MCFGPIO_CLRR_PORT(gpio) (MCFGPIO_CLRR + \ |
| mcfgpio_port(gpio - MCFGPIO_SCR_START)) |
| #else |
| |
| #define MCFGPIO_SCR_START MCFGPIO_PIN_MAX |
| /* with MCFGPIO_SCR == MCFGPIO_PIN_MAX, these will be optimized away */ |
| #define MCFGPIO_SETR_PORT(gpio) 0 |
| #define MCFGPIO_CLRR_PORT(gpio) 0 |
| |
| #endif |
| /* |
| * Coldfire specific helper functions |
| */ |
| |
| /* return the port pin data register for a gpio */ |
| static inline u32 __mcfgpio_ppdr(unsigned gpio) |
| { |
| #if defined(CONFIG_M5206) || defined(CONFIG_M5206e) || \ |
| defined(CONFIG_M5307) || defined(CONFIG_M5407) |
| return MCFSIM_PADAT; |
| #elif defined(CONFIG_M5272) |
| if (gpio < 16) |
| return MCFSIM_PADAT; |
| else if (gpio < 32) |
| return MCFSIM_PBDAT; |
| else |
| return MCFSIM_PCDAT; |
| #elif defined(CONFIG_M5249) || defined(CONFIG_M525x) |
| if (gpio < 32) |
| return MCFSIM2_GPIOREAD; |
| else |
| return MCFSIM2_GPIO1READ; |
| #elif defined(CONFIG_M520x) || defined(CONFIG_M523x) || \ |
| defined(CONFIG_M527x) || defined(CONFIG_M528x) || \ |
| defined(CONFIG_M53xx) || defined(CONFIG_M54xx) || \ |
| defined(CONFIG_M5441x) |
| #if !defined(CONFIG_M5441x) |
| if (gpio < 8) |
| return MCFEPORT_EPPDR; |
| #if defined(CONFIG_M528x) |
| else if (gpio < 16) |
| return MCFGPTA_GPTPORT; |
| else if (gpio < 24) |
| return MCFGPTB_GPTPORT; |
| else if (gpio < 32) |
| return MCFQADC_PORTQA; |
| else if (gpio < 40) |
| return MCFQADC_PORTQB; |
| #endif /* defined(CONFIG_M528x) */ |
| else |
| #endif /* !defined(CONFIG_M5441x) */ |
| return MCFGPIO_PPDR + mcfgpio_port(gpio - MCFGPIO_SCR_START); |
| #else |
| return 0; |
| #endif |
| } |
| |
| /* return the port output data register for a gpio */ |
| static inline u32 __mcfgpio_podr(unsigned gpio) |
| { |
| #if defined(CONFIG_M5206) || defined(CONFIG_M5206e) || \ |
| defined(CONFIG_M5307) || defined(CONFIG_M5407) |
| return MCFSIM_PADAT; |
| #elif defined(CONFIG_M5272) |
| if (gpio < 16) |
| return MCFSIM_PADAT; |
| else if (gpio < 32) |
| return MCFSIM_PBDAT; |
| else |
| return MCFSIM_PCDAT; |
| #elif defined(CONFIG_M5249) || defined(CONFIG_M525x) |
| if (gpio < 32) |
| return MCFSIM2_GPIOWRITE; |
| else |
| return MCFSIM2_GPIO1WRITE; |
| #elif defined(CONFIG_M520x) || defined(CONFIG_M523x) || \ |
| defined(CONFIG_M527x) || defined(CONFIG_M528x) || \ |
| defined(CONFIG_M53xx) || defined(CONFIG_M54xx) || \ |
| defined(CONFIG_M5441x) |
| #if !defined(CONFIG_M5441x) |
| if (gpio < 8) |
| return MCFEPORT_EPDR; |
| #if defined(CONFIG_M528x) |
| else if (gpio < 16) |
| return MCFGPTA_GPTPORT; |
| else if (gpio < 24) |
| return MCFGPTB_GPTPORT; |
| else if (gpio < 32) |
| return MCFQADC_PORTQA; |
| else if (gpio < 40) |
| return MCFQADC_PORTQB; |
| #endif /* defined(CONFIG_M528x) */ |
| else |
| #endif /* !defined(CONFIG_M5441x) */ |
| return MCFGPIO_PODR + mcfgpio_port(gpio - MCFGPIO_SCR_START); |
| #else |
| return 0; |
| #endif |
| } |
| |
| /* return the port direction data register for a gpio */ |
| static inline u32 __mcfgpio_pddr(unsigned gpio) |
| { |
| #if defined(CONFIG_M5206) || defined(CONFIG_M5206e) || \ |
| defined(CONFIG_M5307) || defined(CONFIG_M5407) |
| return MCFSIM_PADDR; |
| #elif defined(CONFIG_M5272) |
| if (gpio < 16) |
| return MCFSIM_PADDR; |
| else if (gpio < 32) |
| return MCFSIM_PBDDR; |
| else |
| return MCFSIM_PCDDR; |
| #elif defined(CONFIG_M5249) || defined(CONFIG_M525x) |
| if (gpio < 32) |
| return MCFSIM2_GPIOENABLE; |
| else |
| return MCFSIM2_GPIO1ENABLE; |
| #elif defined(CONFIG_M520x) || defined(CONFIG_M523x) || \ |
| defined(CONFIG_M527x) || defined(CONFIG_M528x) || \ |
| defined(CONFIG_M53xx) || defined(CONFIG_M54xx) || \ |
| defined(CONFIG_M5441x) |
| #if !defined(CONFIG_M5441x) |
| if (gpio < 8) |
| return MCFEPORT_EPDDR; |
| #if defined(CONFIG_M528x) |
| else if (gpio < 16) |
| return MCFGPTA_GPTDDR; |
| else if (gpio < 24) |
| return MCFGPTB_GPTDDR; |
| else if (gpio < 32) |
| return MCFQADC_DDRQA; |
| else if (gpio < 40) |
| return MCFQADC_DDRQB; |
| #endif /* defined(CONFIG_M528x) */ |
| else |
| #endif /* !defined(CONFIG_M5441x) */ |
| return MCFGPIO_PDDR + mcfgpio_port(gpio - MCFGPIO_SCR_START); |
| #else |
| return 0; |
| #endif |
| } |
| |
| #endif /* mcfgpio_h */ |
