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bea8bcb12d
Add support for the Coldfire 5441x (54410/54415/54416/54417/54418). Currently we only support noMMU mode. It requires the PIT patch posted previously as it uses the PIT instead of the dma timer as a clock source so we can get all that GENERIC_CLOCKEVENTS goodness. It also adds some simple clk definitions and very simple minded power management. The gpio code is tweeked and some additional devices are added to devices.c. The Makefile uses -mv4e as apparently, the only difference a v4m (m5441x) and a v4e is the later has a FPU, which I don't think should matter to us in the kernel. Signed-off-by: Steven King <sfking@fdwdc.com> Signed-off-by: Greg Ungerer <gerg@uclinux.org>
304 lines
8.3 KiB
C
304 lines
8.3 KiB
C
/*
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* Coldfire generic GPIO support.
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*
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* (C) Copyright 2009, Steven King <sfking@fdwdc.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef mcfgpio_h
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#define mcfgpio_h
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#ifdef CONFIG_GPIOLIB
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#include <asm-generic/gpio.h>
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#else
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int __mcfgpio_get_value(unsigned gpio);
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void __mcfgpio_set_value(unsigned gpio, int value);
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int __mcfgpio_direction_input(unsigned gpio);
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int __mcfgpio_direction_output(unsigned gpio, int value);
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int __mcfgpio_request(unsigned gpio);
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void __mcfgpio_free(unsigned gpio);
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/* our alternate 'gpiolib' functions */
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static inline int __gpio_get_value(unsigned gpio)
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{
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if (gpio < MCFGPIO_PIN_MAX)
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return __mcfgpio_get_value(gpio);
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else
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return -EINVAL;
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}
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static inline void __gpio_set_value(unsigned gpio, int value)
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{
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if (gpio < MCFGPIO_PIN_MAX)
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__mcfgpio_set_value(gpio, value);
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}
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static inline int __gpio_cansleep(unsigned gpio)
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{
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if (gpio < MCFGPIO_PIN_MAX)
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return 0;
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else
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return -EINVAL;
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}
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static inline int __gpio_to_irq(unsigned gpio)
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{
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return -EINVAL;
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}
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static inline int gpio_direction_input(unsigned gpio)
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{
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if (gpio < MCFGPIO_PIN_MAX)
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return __mcfgpio_direction_input(gpio);
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else
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return -EINVAL;
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}
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static inline int gpio_direction_output(unsigned gpio, int value)
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{
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if (gpio < MCFGPIO_PIN_MAX)
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return __mcfgpio_direction_output(gpio, value);
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else
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return -EINVAL;
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}
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static inline int gpio_request(unsigned gpio, const char *label)
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{
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if (gpio < MCFGPIO_PIN_MAX)
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return __mcfgpio_request(gpio);
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else
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return -EINVAL;
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}
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static inline void gpio_free(unsigned gpio)
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{
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if (gpio < MCFGPIO_PIN_MAX)
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__mcfgpio_free(gpio);
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}
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#endif /* CONFIG_GPIOLIB */
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/*
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* The Freescale Coldfire family is quite varied in how they implement GPIO.
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* Some parts have 8 bit ports, some have 16bit and some have 32bit; some have
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* only one port, others have multiple ports; some have a single data latch
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* for both input and output, others have a separate pin data register to read
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* input; some require a read-modify-write access to change an output, others
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* have set and clear registers for some of the outputs; Some have all the
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* GPIOs in a single control area, others have some GPIOs implemented in
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* different modules.
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*
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* This implementation attempts accommodate the differences while presenting
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* a generic interface that will optimize to as few instructions as possible.
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*/
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#if defined(CONFIG_M5206) || defined(CONFIG_M5206e) || \
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defined(CONFIG_M520x) || defined(CONFIG_M523x) || \
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defined(CONFIG_M527x) || defined(CONFIG_M528x) || \
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defined(CONFIG_M532x) || defined(CONFIG_M54xx) || \
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defined(CONFIG_M5441x)
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/* These parts have GPIO organized by 8 bit ports */
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#define MCFGPIO_PORTTYPE u8
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#define MCFGPIO_PORTSIZE 8
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#define mcfgpio_read(port) __raw_readb(port)
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#define mcfgpio_write(data, port) __raw_writeb(data, port)
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#elif defined(CONFIG_M5307) || defined(CONFIG_M5407) || defined(CONFIG_M5272)
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/* These parts have GPIO organized by 16 bit ports */
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#define MCFGPIO_PORTTYPE u16
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#define MCFGPIO_PORTSIZE 16
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#define mcfgpio_read(port) __raw_readw(port)
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#define mcfgpio_write(data, port) __raw_writew(data, port)
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#elif defined(CONFIG_M5249) || defined(CONFIG_M525x)
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/* These parts have GPIO organized by 32 bit ports */
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#define MCFGPIO_PORTTYPE u32
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#define MCFGPIO_PORTSIZE 32
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#define mcfgpio_read(port) __raw_readl(port)
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#define mcfgpio_write(data, port) __raw_writel(data, port)
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#endif
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#define mcfgpio_bit(gpio) (1 << ((gpio) % MCFGPIO_PORTSIZE))
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#define mcfgpio_port(gpio) ((gpio) / MCFGPIO_PORTSIZE)
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#if defined(CONFIG_M520x) || defined(CONFIG_M523x) || \
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defined(CONFIG_M527x) || defined(CONFIG_M528x) || \
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defined(CONFIG_M532x) || defined(CONFIG_M5441x)
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/*
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* These parts have an 'Edge' Port module (external interrupt/GPIO) which uses
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* read-modify-write to change an output and a GPIO module which has separate
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* set/clr registers to directly change outputs with a single write access.
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*/
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#if defined(CONFIG_M528x)
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/*
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* The 528x also has GPIOs in other modules (GPT, QADC) which use
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* read-modify-write as well as those controlled by the EPORT and GPIO modules.
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*/
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#define MCFGPIO_SCR_START 40
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#elif defined(CONFIGM5441x)
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/* The m5441x EPORT doesn't have its own GPIO port, uses PORT C */
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#define MCFGPIO_SCR_START 0
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#else
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#define MCFGPIO_SCR_START 8
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#endif
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#define MCFGPIO_SETR_PORT(gpio) (MCFGPIO_SETR + \
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mcfgpio_port(gpio - MCFGPIO_SCR_START))
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#define MCFGPIO_CLRR_PORT(gpio) (MCFGPIO_CLRR + \
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mcfgpio_port(gpio - MCFGPIO_SCR_START))
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#else
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#define MCFGPIO_SCR_START MCFGPIO_PIN_MAX
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/* with MCFGPIO_SCR == MCFGPIO_PIN_MAX, these will be optimized away */
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#define MCFGPIO_SETR_PORT(gpio) 0
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#define MCFGPIO_CLRR_PORT(gpio) 0
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#endif
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/*
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* Coldfire specific helper functions
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*/
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/* return the port pin data register for a gpio */
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static inline u32 __mcfgpio_ppdr(unsigned gpio)
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{
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#if defined(CONFIG_M5206) || defined(CONFIG_M5206e) || \
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defined(CONFIG_M5307) || defined(CONFIG_M5407)
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return MCFSIM_PADAT;
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#elif defined(CONFIG_M5272)
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if (gpio < 16)
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return MCFSIM_PADAT;
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else if (gpio < 32)
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return MCFSIM_PBDAT;
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else
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return MCFSIM_PCDAT;
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#elif defined(CONFIG_M5249) || defined(CONFIG_M525x)
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if (gpio < 32)
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return MCFSIM2_GPIOREAD;
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else
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return MCFSIM2_GPIO1READ;
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#elif defined(CONFIG_M520x) || defined(CONFIG_M523x) || \
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defined(CONFIG_M527x) || defined(CONFIG_M528x) || \
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defined(CONFIG_M532x) || defined(CONFIG_M5441x)
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#if !defined(CONFIG_M5441x)
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if (gpio < 8)
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return MCFEPORT_EPPDR;
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#if defined(CONFIG_M528x)
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else if (gpio < 16)
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return MCFGPTA_GPTPORT;
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else if (gpio < 24)
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return MCFGPTB_GPTPORT;
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else if (gpio < 32)
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return MCFQADC_PORTQA;
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else if (gpio < 40)
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return MCFQADC_PORTQB;
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#endif /* defined(CONFIG_M528x) */
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else
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#endif /* !defined(CONFIG_M5441x) */
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return MCFGPIO_PPDR + mcfgpio_port(gpio - MCFGPIO_SCR_START);
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#else
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return 0;
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#endif
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}
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/* return the port output data register for a gpio */
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static inline u32 __mcfgpio_podr(unsigned gpio)
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{
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#if defined(CONFIG_M5206) || defined(CONFIG_M5206e) || \
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defined(CONFIG_M5307) || defined(CONFIG_M5407)
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return MCFSIM_PADAT;
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#elif defined(CONFIG_M5272)
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if (gpio < 16)
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return MCFSIM_PADAT;
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else if (gpio < 32)
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return MCFSIM_PBDAT;
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else
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return MCFSIM_PCDAT;
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#elif defined(CONFIG_M5249) || defined(CONFIG_M525x)
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if (gpio < 32)
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return MCFSIM2_GPIOWRITE;
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else
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return MCFSIM2_GPIO1WRITE;
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#elif defined(CONFIG_M520x) || defined(CONFIG_M523x) || \
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defined(CONFIG_M527x) || defined(CONFIG_M528x) || \
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defined(CONFIG_M532x) || defined(CONFIG_M5441x)
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#if !defined(CONFIG_M5441x)
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if (gpio < 8)
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return MCFEPORT_EPDR;
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#if defined(CONFIG_M528x)
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else if (gpio < 16)
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return MCFGPTA_GPTPORT;
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else if (gpio < 24)
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return MCFGPTB_GPTPORT;
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else if (gpio < 32)
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return MCFQADC_PORTQA;
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else if (gpio < 40)
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return MCFQADC_PORTQB;
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#endif /* defined(CONFIG_M528x) */
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else
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#endif /* !defined(CONFIG_M5441x) */
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return MCFGPIO_PODR + mcfgpio_port(gpio - MCFGPIO_SCR_START);
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#else
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return 0;
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#endif
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}
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/* return the port direction data register for a gpio */
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static inline u32 __mcfgpio_pddr(unsigned gpio)
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{
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#if defined(CONFIG_M5206) || defined(CONFIG_M5206e) || \
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defined(CONFIG_M5307) || defined(CONFIG_M5407)
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return MCFSIM_PADDR;
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#elif defined(CONFIG_M5272)
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if (gpio < 16)
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return MCFSIM_PADDR;
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else if (gpio < 32)
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return MCFSIM_PBDDR;
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else
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return MCFSIM_PCDDR;
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#elif defined(CONFIG_M5249) || defined(CONFIG_M525x)
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if (gpio < 32)
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return MCFSIM2_GPIOENABLE;
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else
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return MCFSIM2_GPIO1ENABLE;
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#elif defined(CONFIG_M520x) || defined(CONFIG_M523x) || \
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defined(CONFIG_M527x) || defined(CONFIG_M528x) || \
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defined(CONFIG_M532x) || defined(CONFIG_M5441x)
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#if !defined(CONFIG_M5441x)
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if (gpio < 8)
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return MCFEPORT_EPDDR;
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#if defined(CONFIG_M528x)
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else if (gpio < 16)
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return MCFGPTA_GPTDDR;
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else if (gpio < 24)
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return MCFGPTB_GPTDDR;
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else if (gpio < 32)
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return MCFQADC_DDRQA;
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else if (gpio < 40)
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return MCFQADC_DDRQB;
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#endif /* defined(CONFIG_M528x) */
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else
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#endif /* !defined(CONFIG_M5441x) */
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return MCFGPIO_PDDR + mcfgpio_port(gpio - MCFGPIO_SCR_START);
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#else
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return 0;
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#endif
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}
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#endif /* mcfgpio_h */
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