diff options
author | Michael Hennerich <michael.hennerich@analog.com> | 2007-08-28 08:47:46 (GMT) |
---|---|---|
committer | Bryan Wu <bryan.wu@analog.com> | 2007-08-28 08:47:46 (GMT) |
commit | d2b11a468a49716debd96532552a72b6078f1cf5 (patch) | |
tree | b30d94732f9d01b823e60975147b284aead495d9 /arch/blackfin/kernel/bfin_gpio.c | |
parent | 2296fb7ff04531dd8d50394da24f49302ecf103b (diff) | |
download | linux-fsl-qoriq-d2b11a468a49716debd96532552a72b6078f1cf5.tar.xz |
Blackfin arch: Merge GPIO/Peripheral Resource Allocation back into a single file
Signed-off-by: Michael Hennerich <michale.hennerich@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Diffstat (limited to 'arch/blackfin/kernel/bfin_gpio.c')
-rw-r--r-- | arch/blackfin/kernel/bfin_gpio.c | 225 |
1 files changed, 214 insertions, 11 deletions
diff --git a/arch/blackfin/kernel/bfin_gpio.c b/arch/blackfin/kernel/bfin_gpio.c index 0d1e87b..78438d8 100644 --- a/arch/blackfin/kernel/bfin_gpio.c +++ b/arch/blackfin/kernel/bfin_gpio.c @@ -7,7 +7,7 @@ * Description: GPIO Abstraction Layer * * Modified: - * Copyright 2006 Analog Devices Inc. + * Copyright 2007 Analog Devices Inc. * * Bugs: Enter bugs at http://blackfin.uclinux.org/ * @@ -28,9 +28,9 @@ */ /* -* Number BF537/6/4 BF561 BF533/2/1 +* Number BF537/6/4 BF561 BF533/2/1 BF549/8/4/2 * -* GPIO_0 PF0 PF0 PF0 +* GPIO_0 PF0 PF0 PF0 PA0...PJ13 * GPIO_1 PF1 PF1 PF1 * GPIO_2 PF2 PF2 PF2 * GPIO_3 PF3 PF3 PF3 @@ -117,6 +117,21 @@ static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = { }; #endif +#ifdef BF548_FAMILY +static struct gpio_port_t *gpio_array[gpio_bank(MAX_BLACKFIN_GPIOS)] = { + (struct gpio_port_t *)PORTA_FER, + (struct gpio_port_t *)PORTB_FER, + (struct gpio_port_t *)PORTC_FER, + (struct gpio_port_t *)PORTD_FER, + (struct gpio_port_t *)PORTE_FER, + (struct gpio_port_t *)PORTF_FER, + (struct gpio_port_t *)PORTG_FER, + (struct gpio_port_t *)PORTH_FER, + (struct gpio_port_t *)PORTI_FER, + (struct gpio_port_t *)PORTJ_FER, +}; +#endif + static unsigned short reserved_gpio_map[gpio_bank(MAX_BLACKFIN_GPIOS)]; static unsigned short reserved_peri_map[gpio_bank(MAX_BLACKFIN_GPIOS + 16)]; @@ -147,12 +162,24 @@ static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG0_INT #endif /* CONFIG_PM */ +#if defined(BF548_FAMILY) +inline int check_gpio(unsigned short gpio) +{ + if (gpio == GPIO_PB15 || gpio == GPIO_PC14 || gpio == GPIO_PC15 + || gpio == GPIO_PH14 || gpio == GPIO_PH15 + || gpio == GPIO_PJ14 || gpio == GPIO_PJ15 + || gpio > MAX_BLACKFIN_GPIOS) + return -EINVAL; + return 0; +} +#else inline int check_gpio(unsigned short gpio) { if (gpio >= MAX_BLACKFIN_GPIOS) return -EINVAL; return 0; } +#endif static void set_label(unsigned short ident, const char *label) { @@ -185,19 +212,27 @@ static int cmp_label(unsigned short ident, const char *label) static void port_setup(unsigned short gpio, unsigned short usage) { if (!check_gpio(gpio)) { - if (usage == GPIO_USAGE) { + if (usage == GPIO_USAGE) *port_fer[gpio_bank(gpio)] &= ~gpio_bit(gpio); - } else + else *port_fer[gpio_bank(gpio)] |= gpio_bit(gpio); SSYNC(); } } +#elif defined(BF548_FAMILY) +static void port_setup(unsigned short gpio, unsigned short usage) +{ + if (usage == GPIO_USAGE) + gpio_array[gpio_bank(gpio)]->port_fer &= ~gpio_bit(gpio); + else + gpio_array[gpio_bank(gpio)]->port_fer |= gpio_bit(gpio); + SSYNC(); +} #else # define port_setup(...) do { } while (0) #endif #ifdef BF537_FAMILY - static struct { unsigned short res; unsigned short offset; @@ -268,11 +303,32 @@ static void portmux_setup(unsigned short per, unsigned short function) } } } +#elif defined(BF548_FAMILY) +inline void portmux_setup(unsigned short portno, unsigned short function) +{ + u32 pmux; + + pmux = gpio_array[gpio_bank(portno)]->port_mux; + + pmux &= ~(0x3 << (2 * gpio_sub_n(portno))); + pmux |= (function & 0x3) << (2 * gpio_sub_n(portno)); + + gpio_array[gpio_bank(portno)]->port_mux = pmux; +} + +inline u16 get_portmux(unsigned short portno) +{ + u32 pmux; + pmux = gpio_array[gpio_bank(portno)]->port_mux; + + return (pmux >> (2 * gpio_sub_n(portno)) & 0x3); +} #else # define portmux_setup(...) do { } while (0) #endif +#ifndef BF548_FAMILY static void default_gpio(unsigned short gpio) { unsigned short bank, bitmask; @@ -289,6 +345,9 @@ static void default_gpio(unsigned short gpio) gpio_bankb[bank]->both &= ~bitmask; gpio_bankb[bank]->edge &= ~bitmask; } +#else +# define default_gpio(...) do { } while (0) +#endif static int __init bfin_gpio_init(void) { @@ -307,6 +366,7 @@ static int __init bfin_gpio_init(void) arch_initcall(bfin_gpio_init); +#ifndef BF548_FAMILY /*********************************************************** * * FUNCTIONS: Blackfin General Purpose Ports Access Functions @@ -658,9 +718,95 @@ void gpio_pm_restore(void) } #endif +#endif /* BF548_FAMILY */ +/*********************************************************** +* +* FUNCTIONS: Blackfin Peripheral Resource Allocation +* and PortMux Setup +* +* INPUTS/OUTPUTS: +* per Peripheral Identifier +* label String +* +* DESCRIPTION: Blackfin Peripheral Resource Allocation and Setup API +* +* CAUTION: +************************************************************* +* MODIFICATION HISTORY : +**************************************************************/ + +#ifdef BF548_FAMILY +int peripheral_request(unsigned short per, const char *label) +{ + unsigned long flags; + unsigned short ident = P_IDENT(per); + + /* + * Don't cares are pins with only one dedicated function + */ + if (per & P_DONTCARE) + return 0; + + if (!(per & P_DEFINED)) + return -ENODEV; + + if (check_gpio(ident) < 0) + return -EINVAL; + local_irq_save(flags); + + if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) { + printk(KERN_ERR + "%s: Peripheral %d is already reserved as GPIO by %s !\n", + __FUNCTION__, ident, get_label(ident)); + dump_stack(); + local_irq_restore(flags); + return -EBUSY; + } + + if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) { + + u16 funct = get_portmux(ident); + + /* + * Pin functions like AMC address strobes my + * be requested and used by several drivers + */ + + if (!((per & P_MAYSHARE) && (funct == P_FUNCT2MUX(per)))) { + + /* + * Allow that the identical pin function can + * be requested from the same driver twice + */ + + if (cmp_label(ident, label) == 0) + goto anyway; + + printk(KERN_ERR + "%s: Peripheral %d function %d is already reserved by %s !\n", + __FUNCTION__, ident, P_FUNCT2MUX(per), get_label(ident)); + dump_stack(); + local_irq_restore(flags); + return -EBUSY; + } + } + +anyway: + reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident); + + portmux_setup(ident, P_FUNCT2MUX(per)); + port_setup(ident, PERIPHERAL_USAGE); + + local_irq_restore(flags); + set_label(ident, label); + + return 0; +} +EXPORT_SYMBOL(peripheral_request); +#else int peripheral_request(unsigned short per, const char *label) { @@ -722,8 +868,6 @@ int peripheral_request(unsigned short per, const char *label) } anyway: - - portmux_setup(per, P_FUNCT2MUX(per)); port_setup(ident, PERIPHERAL_USAGE); @@ -735,6 +879,7 @@ anyway: return 0; } EXPORT_SYMBOL(peripheral_request); +#endif int peripheral_request_list(unsigned short per[], const char *label) { @@ -805,8 +950,8 @@ EXPORT_SYMBOL(peripheral_free_list); * FUNCTIONS: Blackfin GPIO Driver * * INPUTS/OUTPUTS: -* gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS -* +* gpio PIO Number between 0 and MAX_BLACKFIN_GPIOS +* label String * * DESCRIPTION: Blackfin GPIO Driver API * @@ -825,16 +970,27 @@ int gpio_request(unsigned short gpio, const char *label) local_irq_save(flags); if (unlikely(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) { - printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved!\n", gpio); + printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved by %s !\n", + gpio, get_label(gpio)); + dump_stack(); + local_irq_restore(flags); + return -EBUSY; + } + if (unlikely(reserved_peri_map[gpio_bank(gpio)] & gpio_bit(gpio))) { + printk(KERN_ERR + "bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n", + gpio, get_label(gpio)); dump_stack(); local_irq_restore(flags); return -EBUSY; } + reserved_gpio_map[gpio_bank(gpio)] |= gpio_bit(gpio); local_irq_restore(flags); port_setup(gpio, GPIO_USAGE); + set_label(gpio, label); return 0; } @@ -864,6 +1020,51 @@ void gpio_free(unsigned short gpio) } EXPORT_SYMBOL(gpio_free); +#ifdef BF548_FAMILY +void gpio_direction_input(unsigned short gpio) +{ + unsigned long flags; + + BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))); + + local_irq_save(flags); + gpio_array[gpio_bank(gpio)]->port_dir_clear = gpio_bit(gpio); + gpio_array[gpio_bank(gpio)]->port_inen |= gpio_bit(gpio); + local_irq_restore(flags); +} +EXPORT_SYMBOL(gpio_direction_input); + +void gpio_direction_output(unsigned short gpio) +{ + unsigned long flags; + + BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))); + + local_irq_save(flags); + gpio_array[gpio_bank(gpio)]->port_inen &= ~gpio_bit(gpio); + gpio_array[gpio_bank(gpio)]->port_dir_set = gpio_bit(gpio); + local_irq_restore(flags); +} +EXPORT_SYMBOL(gpio_direction_output); + +void gpio_set_value(unsigned short gpio, unsigned short arg) +{ + if (arg) + gpio_array[gpio_bank(gpio)]->port_set = gpio_bit(gpio); + else + gpio_array[gpio_bank(gpio)]->port_clear = gpio_bit(gpio); + +} +EXPORT_SYMBOL(gpio_set_value); + +unsigned short gpio_get_value(unsigned short gpio) +{ + return (1 & (gpio_array[gpio_bank(gpio)]->port_data >> gpio_sub_n(gpio))); +} +EXPORT_SYMBOL(gpio_get_value); + +#else + void gpio_direction_input(unsigned short gpio) { unsigned long flags; @@ -908,3 +1109,5 @@ void bfin_gpio_reset_spi0_ssel1(void) gpio_bankb[gpio_bank(gpio)]->data_set = gpio_bit(gpio); udelay(1); } + +#endif /*BF548_FAMILY */ |