diff options
Diffstat (limited to 'arch/blackfin/kernel/bfin_gpio.c')
| -rw-r--r-- | arch/blackfin/kernel/bfin_gpio.c | 1346 |
1 files changed, 648 insertions, 698 deletions
diff --git a/arch/blackfin/kernel/bfin_gpio.c b/arch/blackfin/kernel/bfin_gpio.c index 08788f7bbfb..a017359c182 100644 --- a/arch/blackfin/kernel/bfin_gpio.c +++ b/arch/blackfin/kernel/bfin_gpio.c @@ -1,92 +1,17 @@ /* - * File: arch/blackfin/kernel/bfin_gpio.c - * Based on: - * Author: Michael Hennerich (hennerich@blackfin.uclinux.org) + * GPIO Abstraction Layer * - * Created: - * Description: GPIO Abstraction Layer + * Copyright 2006-2010 Analog Devices Inc. * - * Modified: - * Copyright 2008 Analog Devices Inc. - * - * Bugs: Enter bugs at http://blackfin.uclinux.org/ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see the file COPYING, or write - * to the Free Software Foundation, Inc., - * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * Licensed under the GPL-2 or later */ -/* -* Number BF537/6/4 BF561 BF533/2/1 BF549/8/4/2 -* -* GPIO_0 PF0 PF0 PF0 PA0...PJ13 -* GPIO_1 PF1 PF1 PF1 -* GPIO_2 PF2 PF2 PF2 -* GPIO_3 PF3 PF3 PF3 -* GPIO_4 PF4 PF4 PF4 -* GPIO_5 PF5 PF5 PF5 -* GPIO_6 PF6 PF6 PF6 -* GPIO_7 PF7 PF7 PF7 -* GPIO_8 PF8 PF8 PF8 -* GPIO_9 PF9 PF9 PF9 -* GPIO_10 PF10 PF10 PF10 -* GPIO_11 PF11 PF11 PF11 -* GPIO_12 PF12 PF12 PF12 -* GPIO_13 PF13 PF13 PF13 -* GPIO_14 PF14 PF14 PF14 -* GPIO_15 PF15 PF15 PF15 -* GPIO_16 PG0 PF16 -* GPIO_17 PG1 PF17 -* GPIO_18 PG2 PF18 -* GPIO_19 PG3 PF19 -* GPIO_20 PG4 PF20 -* GPIO_21 PG5 PF21 -* GPIO_22 PG6 PF22 -* GPIO_23 PG7 PF23 -* GPIO_24 PG8 PF24 -* GPIO_25 PG9 PF25 -* GPIO_26 PG10 PF26 -* GPIO_27 PG11 PF27 -* GPIO_28 PG12 PF28 -* GPIO_29 PG13 PF29 -* GPIO_30 PG14 PF30 -* GPIO_31 PG15 PF31 -* GPIO_32 PH0 PF32 -* GPIO_33 PH1 PF33 -* GPIO_34 PH2 PF34 -* GPIO_35 PH3 PF35 -* GPIO_36 PH4 PF36 -* GPIO_37 PH5 PF37 -* GPIO_38 PH6 PF38 -* GPIO_39 PH7 PF39 -* GPIO_40 PH8 PF40 -* GPIO_41 PH9 PF41 -* GPIO_42 PH10 PF42 -* GPIO_43 PH11 PF43 -* GPIO_44 PH12 PF44 -* GPIO_45 PH13 PF45 -* GPIO_46 PH14 PF46 -* GPIO_47 PH15 PF47 -*/ - #include <linux/delay.h> #include <linux/module.h> #include <linux/err.h> #include <linux/proc_fs.h> -#include <asm/blackfin.h> -#include <asm/gpio.h> -#include <asm/portmux.h> +#include <linux/seq_file.h> +#include <linux/gpio.h> #include <linux/irq.h> #if ANOMALY_05000311 || ANOMALY_05000323 @@ -95,14 +20,14 @@ enum { AWA_data_clear = SYSCR, AWA_data_set = SYSCR, AWA_toggle = SYSCR, - AWA_maska = UART_SCR, - AWA_maska_clear = UART_SCR, - AWA_maska_set = UART_SCR, - AWA_maska_toggle = UART_SCR, - AWA_maskb = UART_GCTL, - AWA_maskb_clear = UART_GCTL, - AWA_maskb_set = UART_GCTL, - AWA_maskb_toggle = UART_GCTL, + AWA_maska = BFIN_UART_SCR, + AWA_maska_clear = BFIN_UART_SCR, + AWA_maska_set = BFIN_UART_SCR, + AWA_maska_toggle = BFIN_UART_SCR, + AWA_maskb = BFIN_UART_GCTL, + AWA_maskb_clear = BFIN_UART_GCTL, + AWA_maskb_set = BFIN_UART_GCTL, + AWA_maskb_toggle = BFIN_UART_GCTL, AWA_dir = SPORT1_STAT, AWA_polar = SPORT1_STAT, AWA_edge = SPORT1_STAT, @@ -119,123 +44,79 @@ enum { #define AWA_DUMMY_READ(...) do { } while (0) #endif -#ifdef BF533_FAMILY -static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = { +static struct gpio_port_t * const gpio_array[] = { +#if defined(BF533_FAMILY) || defined(BF538_FAMILY) (struct gpio_port_t *) FIO_FLAG_D, -}; -#endif - -#if defined(BF527_FAMILY) || defined(BF537_FAMILY) -static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = { +#elif defined(CONFIG_BF52x) || defined(BF537_FAMILY) || defined(CONFIG_BF51x) (struct gpio_port_t *) PORTFIO, (struct gpio_port_t *) PORTGIO, (struct gpio_port_t *) PORTHIO, +#elif defined(BF561_FAMILY) + (struct gpio_port_t *) FIO0_FLAG_D, + (struct gpio_port_t *) FIO1_FLAG_D, + (struct gpio_port_t *) FIO2_FLAG_D, +#else +# error no gpio arrays defined +#endif }; -static unsigned short *port_fer[gpio_bank(MAX_BLACKFIN_GPIOS)] = { +#if defined(CONFIG_BF52x) || defined(BF537_FAMILY) || defined(CONFIG_BF51x) +static unsigned short * const port_fer[] = { (unsigned short *) PORTF_FER, (unsigned short *) PORTG_FER, (unsigned short *) PORTH_FER, }; -#endif -#ifdef BF527_FAMILY -static unsigned short *port_mux[gpio_bank(MAX_BLACKFIN_GPIOS)] = { +# if !defined(BF537_FAMILY) +static unsigned short * const port_mux[] = { (unsigned short *) PORTF_MUX, (unsigned short *) PORTG_MUX, (unsigned short *) PORTH_MUX, }; static const -u8 pmux_offset[][16] = - {{ 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 4, 6, 8, 8, 10, 10 }, /* PORTF */ - { 0, 0, 0, 0, 0, 2, 2, 4, 4, 6, 8, 10, 10, 10, 12, 12 }, /* PORTG */ - { 0, 0, 0, 0, 0, 0, 0, 0, 2, 4, 4, 4, 4, 4, 4, 4 }, /* PORTH */ - }; -#endif - -#ifdef BF561_FAMILY -static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = { - (struct gpio_port_t *) FIO0_FLAG_D, - (struct gpio_port_t *) FIO1_FLAG_D, - (struct gpio_port_t *) FIO2_FLAG_D, +u8 pmux_offset[][16] = { +# if defined(CONFIG_BF52x) + { 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 4, 6, 8, 8, 10, 10 }, /* PORTF */ + { 0, 0, 0, 0, 0, 2, 2, 4, 4, 6, 8, 10, 10, 10, 12, 12 }, /* PORTG */ + { 0, 0, 0, 0, 0, 0, 0, 0, 2, 4, 4, 4, 4, 4, 4, 4 }, /* PORTH */ +# elif defined(CONFIG_BF51x) + { 0, 2, 2, 2, 2, 2, 2, 4, 6, 6, 6, 8, 8, 8, 8, 10 }, /* PORTF */ + { 0, 0, 0, 2, 4, 6, 6, 6, 8, 10, 10, 12, 14, 14, 14, 14 }, /* PORTG */ + { 0, 0, 0, 0, 2, 2, 4, 6, 10, 10, 10, 10, 10, 10, 10, 10 }, /* PORTH */ +# endif }; -#endif +# 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, +#elif defined(BF538_FAMILY) +static unsigned short * const port_fer[] = { + (unsigned short *) PORTCIO_FER, + (unsigned short *) PORTDIO_FER, + (unsigned short *) PORTEIO_FER, }; #endif -static unsigned short reserved_gpio_map[gpio_bank(MAX_BLACKFIN_GPIOS)]; -static unsigned short reserved_peri_map[gpio_bank(MAX_RESOURCES)]; - -#define RESOURCE_LABEL_SIZE 16 +#define RESOURCE_LABEL_SIZE 16 static struct str_ident { char name[RESOURCE_LABEL_SIZE]; } str_ident[MAX_RESOURCES]; -#if defined(CONFIG_PM) && !defined(CONFIG_BF54x) -static unsigned short wakeup_map[gpio_bank(MAX_BLACKFIN_GPIOS)]; -static unsigned char wakeup_flags_map[MAX_BLACKFIN_GPIOS]; -static struct gpio_port_s gpio_bank_saved[gpio_bank(MAX_BLACKFIN_GPIOS)]; - -#ifdef BF533_FAMILY -static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG_INTB}; -#endif - -#ifdef BF537_FAMILY -static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG_INTB, IRQ_PORTG_INTB, IRQ_MAC_TX}; +#if defined(CONFIG_PM) +static struct gpio_port_s gpio_bank_saved[GPIO_BANK_NUM]; +# ifdef BF538_FAMILY +static unsigned short port_fer_saved[3]; +# endif #endif -#ifdef BF527_FAMILY -static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PORTF_INTB, IRQ_PORTG_INTB, IRQ_PORTH_INTB}; -#endif - -#ifdef BF561_FAMILY -static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG0_INTB, IRQ_PROG1_INTB, IRQ_PROG2_INTB}; -#endif - -#endif /* CONFIG_PM */ - -#if defined(BF548_FAMILY) -inline int check_gpio(unsigned 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 gpio) -{ - if (gpio >= MAX_BLACKFIN_GPIOS) - return -EINVAL; - return 0; -} -#endif - -void gpio_error(unsigned gpio) +static void gpio_error(unsigned gpio) { printk(KERN_ERR "bfin-gpio: GPIO %d wasn't requested!\n", gpio); } static void set_label(unsigned short ident, const char *label) { - if (label && str_ident) { + if (label) { strncpy(str_ident[ident].name, label, RESOURCE_LABEL_SIZE); str_ident[ident].name[RESOURCE_LABEL_SIZE - 1] = 0; @@ -244,9 +125,6 @@ static void set_label(unsigned short ident, const char *label) static char *get_label(unsigned short ident) { - if (!str_ident) - return "UNKNOWN"; - return (*str_ident[ident].name ? str_ident[ident].name : "UNKNOWN"); } @@ -257,136 +135,189 @@ static int cmp_label(unsigned short ident, const char *label) printk(KERN_ERR "Please provide none-null label\n"); } - if (label && str_ident) - return strncmp(str_ident[ident].name, - label, strlen(label)); + if (label) + return strcmp(str_ident[ident].name, label); else return -EINVAL; } -#if defined(BF527_FAMILY) || defined(BF537_FAMILY) -static void port_setup(unsigned gpio, unsigned short usage) +#define map_entry(m, i) reserved_##m##_map[gpio_bank(i)] +#define is_reserved(m, i, e) (map_entry(m, i) & gpio_bit(i)) +#define reserve(m, i) (map_entry(m, i) |= gpio_bit(i)) +#define unreserve(m, i) (map_entry(m, i) &= ~gpio_bit(i)) +#define DECLARE_RESERVED_MAP(m, c) static unsigned short reserved_##m##_map[c] + +DECLARE_RESERVED_MAP(gpio, GPIO_BANK_NUM); +DECLARE_RESERVED_MAP(peri, DIV_ROUND_UP(MAX_RESOURCES, GPIO_BANKSIZE)); +DECLARE_RESERVED_MAP(gpio_irq, GPIO_BANK_NUM); + +inline int check_gpio(unsigned gpio) { - if (!check_gpio(gpio)) { - if (usage == GPIO_USAGE) - *port_fer[gpio_bank(gpio)] &= ~gpio_bit(gpio); - else - *port_fer[gpio_bank(gpio)] |= gpio_bit(gpio); - SSYNC(); - } + if (gpio >= MAX_BLACKFIN_GPIOS) + return -EINVAL; + return 0; } -#elif defined(BF548_FAMILY) + static void port_setup(unsigned gpio, unsigned short usage) { +#if defined(BF538_FAMILY) + /* + * BF538/9 Port C,D and E are special. + * Inverted PORT_FER polarity on CDE and no PORF_FER on F + * Regular PORT F GPIOs are handled here, CDE are exclusively + * managed by GPIOLIB + */ + + if (gpio < MAX_BLACKFIN_GPIOS || gpio >= MAX_RESOURCES) + return; + + gpio -= MAX_BLACKFIN_GPIOS; + if (usage == GPIO_USAGE) - gpio_array[gpio_bank(gpio)]->port_fer &= ~gpio_bit(gpio); + *port_fer[gpio_bank(gpio)] |= gpio_bit(gpio); else - gpio_array[gpio_bank(gpio)]->port_fer |= gpio_bit(gpio); + *port_fer[gpio_bank(gpio)] &= ~gpio_bit(gpio); SSYNC(); -} -#else -# define port_setup(...) do { } while (0) + return; #endif + if (check_gpio(gpio)) + return; + +#if defined(CONFIG_BF52x) || defined(BF537_FAMILY) || defined(CONFIG_BF51x) + if (usage == GPIO_USAGE) + *port_fer[gpio_bank(gpio)] &= ~gpio_bit(gpio); + else + *port_fer[gpio_bank(gpio)] |= gpio_bit(gpio); + SSYNC(); +#endif +} + #ifdef BF537_FAMILY -static struct { - unsigned short res; - unsigned short offset; -} port_mux_lut[] = { - {.res = P_PPI0_D13, .offset = 11}, - {.res = P_PPI0_D14, .offset = 11}, - {.res = P_PPI0_D15, .offset = 11}, - {.res = P_SPORT1_TFS, .offset = 11}, - {.res = P_SPORT1_TSCLK, .offset = 11}, - {.res = P_SPORT1_DTPRI, .offset = 11}, - {.res = P_PPI0_D10, .offset = 10}, - {.res = P_PPI0_D11, .offset = 10}, - {.res = P_PPI0_D12, .offset = 10}, - {.res = P_SPORT1_RSCLK, .offset = 10}, - {.res = P_SPORT1_RFS, .offset = 10}, - {.res = P_SPORT1_DRPRI, .offset = 10}, - {.res = P_PPI0_D8, .offset = 9}, - {.res = P_PPI0_D9, .offset = 9}, - {.res = P_SPORT1_DRSEC, .offset = 9}, - {.res = P_SPORT1_DTSEC, .offset = 9}, - {.res = P_TMR2, .offset = 8}, - {.res = P_PPI0_FS3, .offset = 8}, - {.res = P_TMR3, .offset = 7}, - {.res = P_SPI0_SSEL4, .offset = 7}, - {.res = P_TMR4, .offset = 6}, - {.res = P_SPI0_SSEL5, .offset = 6}, - {.res = P_TMR5, .offset = 5}, - {.res = P_SPI0_SSEL6, .offset = 5}, - {.res = P_UART1_RX, .offset = 4}, - {.res = P_UART1_TX, .offset = 4}, - {.res = P_TMR6, .offset = 4}, - {.res = P_TMR7, .offset = 4}, - {.res = P_UART0_RX, .offset = 3}, - {.res = P_UART0_TX, .offset = 3}, - {.res = P_DMAR0, .offset = 3}, - {.res = P_DMAR1, .offset = 3}, - {.res = P_SPORT0_DTSEC, .offset = 1}, - {.res = P_SPORT0_DRSEC, .offset = 1}, - {.res = P_CAN0_RX, .offset = 1}, - {.res = P_CAN0_TX, .offset = 1}, - {.res = P_SPI0_SSEL7, .offset = 1}, - {.res = P_SPORT0_TFS, .offset = 0}, - {.res = P_SPORT0_DTPRI, .offset = 0}, - {.res = P_SPI0_SSEL2, .offset = 0}, - {.res = P_SPI0_SSEL3, .offset = 0}, +static const s8 port_mux[] = { + [GPIO_PF0] = 3, + [GPIO_PF1] = 3, + [GPIO_PF2] = 4, + [GPIO_PF3] = 4, + [GPIO_PF4] = 5, + [GPIO_PF5] = 6, + [GPIO_PF6] = 7, + [GPIO_PF7] = 8, + [GPIO_PF8 ... GPIO_PF15] = -1, + [GPIO_PG0 ... GPIO_PG7] = -1, + [GPIO_PG8] = 9, + [GPIO_PG9] = 9, + [GPIO_PG10] = 10, + [GPIO_PG11] = 10, + [GPIO_PG12] = 10, + [GPIO_PG13] = 11, + [GPIO_PG14] = 11, + [GPIO_PG15] = 11, + [GPIO_PH0 ... GPIO_PH15] = -1, + [PORT_PJ0 ... PORT_PJ3] = -1, + [PORT_PJ4] = 1, + [PORT_PJ5] = 1, + [PORT_PJ6 ... PORT_PJ9] = -1, + [PORT_PJ10] = 0, + [PORT_PJ11] = 0, }; -static void portmux_setup(unsigned short per, unsigned short function) +static int portmux_group_check(unsigned short per) { - u16 y, offset, muxreg; - - for (y = 0; y < ARRAY_SIZE(port_mux_lut); y++) { - if (port_mux_lut[y].res == per) { + u16 ident = P_IDENT(per); + u16 function = P_FUNCT2MUX(per); + s8 offset = port_mux[ident]; + u16 m, pmux, pfunc, mask; - /* SET PORTMUX REG */ + if (offset < 0) + return 0; - offset = port_mux_lut[y].offset; - muxreg = bfin_read_PORT_MUX(); + pmux = bfin_read_PORT_MUX(); + for (m = 0; m < ARRAY_SIZE(port_mux); ++m) { + if (m == ident) + continue; + if (port_mux[m] != offset) + continue; + if (!is_reserved(peri, m, 1)) + continue; - if (offset != 1) { - muxreg &= ~(1 << offset); - } else { - muxreg &= ~(3 << 1); - } + if (offset == 1) + mask = 3; + else + mask = 1; - muxreg |= (function << offset); - bfin_write_PORT_MUX(muxreg); + pfunc = (pmux >> offset) & mask; + if (pfunc != (function & mask)) { + pr_err("pin group conflict! request pin %d func %d conflict with pin %d func %d\n", + ident, function, m, pfunc); + return -EINVAL; } } + + return 0; } -#elif defined(BF548_FAMILY) -inline void portmux_setup(unsigned short portno, unsigned short function) + +static void portmux_setup(unsigned short per) { - u32 pmux; + u16 ident = P_IDENT(per); + u16 function = P_FUNCT2MUX(per); + s8 offset = port_mux[ident]; + u16 pmux, mask; - pmux = gpio_array[gpio_bank(portno)]->port_mux; + if (offset == -1) + return; - pmux &= ~(0x3 << (2 * gpio_sub_n(portno))); - pmux |= (function & 0x3) << (2 * gpio_sub_n(portno)); + pmux = bfin_read_PORT_MUX(); + if (offset == 1) + mask = 3; + else + mask = 1; - gpio_array[gpio_bank(portno)]->port_mux = pmux; -} + pmux &= ~(mask << offset); + pmux |= ((function & mask) << offset); -inline u16 get_portmux(unsigned short portno) + bfin_write_PORT_MUX(pmux); +} +#elif defined(CONFIG_BF52x) || defined(CONFIG_BF51x) +static int portmux_group_check(unsigned short per) { - u32 pmux; + u16 ident = P_IDENT(per); + u16 function = P_FUNCT2MUX(per); + u8 offset = pmux_offset[gpio_bank(ident)][gpio_sub_n(ident)]; + u16 pin, gpiopin, pfunc; - pmux = gpio_array[gpio_bank(portno)]->port_mux; + for (pin = 0; pin < GPIO_BANKSIZE; ++pin) { + if (offset != pmux_offset[gpio_bank(ident)][pin]) + continue; + + gpiopin = gpio_bank(ident) * GPIO_BANKSIZE + pin; + if (gpiopin == ident) + continue; + if (!is_reserved(peri, gpiopin, 1)) + continue; + + pfunc = *port_mux[gpio_bank(ident)]; + pfunc = (pfunc >> offset) & 3; + if (pfunc != function) { + pr_err("pin group conflict! request pin %d func %d conflict with pin %d func %d\n", + ident, function, gpiopin, pfunc); + return -EINVAL; + } + } - return (pmux >> (2 * gpio_sub_n(portno)) & 0x3); + return 0; } -#elif defined(BF527_FAMILY) -inline void portmux_setup(unsigned short portno, unsigned short function) + +inline void portmux_setup(unsigned short per) { - u16 pmux, ident = P_IDENT(portno); + u16 ident = P_IDENT(per); + u16 function = P_FUNCT2MUX(per); u8 offset = pmux_offset[gpio_bank(ident)][gpio_sub_n(ident)]; + u16 pmux; pmux = *port_mux[gpio_bank(ident)]; + if (((pmux >> offset) & 3) == function) + return; pmux &= ~(3 << offset); pmux |= (function & 3) << offset; *port_mux[gpio_bank(ident)] = pmux; @@ -394,46 +325,12 @@ inline void portmux_setup(unsigned short portno, unsigned short function) } #else # define portmux_setup(...) do { } while (0) -#endif - -#ifndef BF548_FAMILY -static void default_gpio(unsigned gpio) +static int portmux_group_check(unsigned short per) { - unsigned short bank, bitmask; - unsigned long flags; - - bank = gpio_bank(gpio); - bitmask = gpio_bit(gpio); - - local_irq_save(flags); - - gpio_bankb[bank]->maska_clear = bitmask; - gpio_bankb[bank]->maskb_clear = bitmask; - SSYNC(); - gpio_bankb[bank]->inen &= ~bitmask; - gpio_bankb[bank]->dir &= ~bitmask; - gpio_bankb[bank]->polar &= ~bitmask; - gpio_bankb[bank]->both &= ~bitmask; - gpio_bankb[bank]->edge &= ~bitmask; - AWA_DUMMY_READ(edge); - local_irq_restore(flags); -} -#else -# define default_gpio(...) do { } while (0) -#endif - -static int __init bfin_gpio_init(void) -{ - - printk(KERN_INFO "Blackfin GPIO Controller\n"); - return 0; - } -arch_initcall(bfin_gpio_init); - +#endif -#ifndef BF548_FAMILY /*********************************************************** * * FUNCTIONS: Blackfin General Purpose Ports Access Functions @@ -457,92 +354,73 @@ arch_initcall(bfin_gpio_init); void set_gpio_ ## name(unsigned gpio, unsigned short arg) \ { \ unsigned long flags; \ - local_irq_save(flags); \ + flags = hard_local_irq_save(); \ if (arg) \ - gpio_bankb[gpio_bank(gpio)]->name |= gpio_bit(gpio); \ + gpio_array[gpio_bank(gpio)]->name |= gpio_bit(gpio); \ else \ - gpio_bankb[gpio_bank(gpio)]->name &= ~gpio_bit(gpio); \ + gpio_array[gpio_bank(gpio)]->name &= ~gpio_bit(gpio); \ AWA_DUMMY_READ(name); \ - local_irq_restore(flags); \ + hard_local_irq_restore(flags); \ } \ EXPORT_SYMBOL(set_gpio_ ## name); -SET_GPIO(dir) -SET_GPIO(inen) -SET_GPIO(polar) -SET_GPIO(edge) -SET_GPIO(both) +SET_GPIO(dir) /* set_gpio_dir() */ +SET_GPIO(inen) /* set_gpio_inen() */ +SET_GPIO(polar) /* set_gpio_polar() */ +SET_GPIO(edge) /* set_gpio_edge() */ +SET_GPIO(both) /* set_gpio_both() */ -#if ANOMALY_05000311 || ANOMALY_05000323 #define SET_GPIO_SC(name) \ void set_gpio_ ## name(unsigned gpio, unsigned short arg) \ { \ unsigned long flags; \ - local_irq_save(flags); \ + if (ANOMALY_05000311 || ANOMALY_05000323) \ + flags = hard_local_irq_save(); \ if (arg) \ - gpio_bankb[gpio_bank(gpio)]->name ## _set = gpio_bit(gpio); \ + gpio_array[gpio_bank(gpio)]->name ## _set = gpio_bit(gpio); \ else \ - gpio_bankb[gpio_bank(gpio)]->name ## _clear = gpio_bit(gpio); \ - AWA_DUMMY_READ(name); \ - local_irq_restore(flags); \ + gpio_array[gpio_bank(gpio)]->name ## _clear = gpio_bit(gpio); \ + if (ANOMALY_05000311 || ANOMALY_05000323) { \ + AWA_DUMMY_READ(name); \ + hard_local_irq_restore(flags); \ + } \ } \ EXPORT_SYMBOL(set_gpio_ ## name); -#else -#define SET_GPIO_SC(name) \ -void set_gpio_ ## name(unsigned gpio, unsigned short arg) \ -{ \ - if (arg) \ - gpio_bankb[gpio_bank(gpio)]->name ## _set = gpio_bit(gpio); \ - else \ - gpio_bankb[gpio_bank(gpio)]->name ## _clear = gpio_bit(gpio); \ -} \ -EXPORT_SYMBOL(set_gpio_ ## name); -#endif SET_GPIO_SC(maska) SET_GPIO_SC(maskb) SET_GPIO_SC(data) -#if ANOMALY_05000311 || ANOMALY_05000323 void set_gpio_toggle(unsigned gpio) { unsigned long flags; - local_irq_save(flags); - gpio_bankb[gpio_bank(gpio)]->toggle = gpio_bit(gpio); - AWA_DUMMY_READ(toggle); - local_irq_restore(flags); -} -#else -void set_gpio_toggle(unsigned gpio) -{ - gpio_bankb[gpio_bank(gpio)]->toggle = gpio_bit(gpio); + if (ANOMALY_05000311 || ANOMALY_05000323) + flags = hard_local_irq_save(); + gpio_array[gpio_bank(gpio)]->toggle = gpio_bit(gpio); + if (ANOMALY_05000311 || ANOMALY_05000323) { + AWA_DUMMY_READ(toggle); + hard_local_irq_restore(flags); + } } -#endif EXPORT_SYMBOL(set_gpio_toggle); /*Set current PORT date (16-bit word)*/ -#if ANOMALY_05000311 || ANOMALY_05000323 #define SET_GPIO_P(name) \ void set_gpiop_ ## name(unsigned gpio, unsigned short arg) \ { \ unsigned long flags; \ - local_irq_save(flags); \ - gpio_bankb[gpio_bank(gpio)]->name = arg; \ - AWA_DUMMY_READ(name); \ - local_irq_restore(flags); \ -} \ -EXPORT_SYMBOL(set_gpiop_ ## name); -#else -#define SET_GPIO_P(name) \ -void set_gpiop_ ## name(unsigned gpio, unsigned short arg) \ -{ \ - gpio_bankb[gpio_bank(gpio)]->name = arg; \ + if (ANOMALY_05000311 || ANOMALY_05000323) \ + flags = hard_local_irq_save(); \ + gpio_array[gpio_bank(gpio)]->name = arg; \ + if (ANOMALY_05000311 || ANOMALY_05000323) { \ + AWA_DUMMY_READ(name); \ + hard_local_irq_restore(flags); \ + } \ } \ EXPORT_SYMBOL(set_gpiop_ ## name); -#endif SET_GPIO_P(data) SET_GPIO_P(dir) @@ -554,27 +432,21 @@ SET_GPIO_P(maska) SET_GPIO_P(maskb) /* Get a specific bit */ -#if ANOMALY_05000311 || ANOMALY_05000323 #define GET_GPIO(name) \ unsigned short get_gpio_ ## name(unsigned gpio) \ { \ unsigned long flags; \ unsigned short ret; \ - local_irq_save(flags); \ - ret = 0x01 & (gpio_bankb[gpio_bank(gpio)]->name >> gpio_sub_n(gpio)); \ - AWA_DUMMY_READ(name); \ - local_irq_restore(flags); \ + if (ANOMALY_05000311 || ANOMALY_05000323) \ + flags = hard_local_irq_save(); \ + ret = 0x01 & (gpio_array[gpio_bank(gpio)]->name >> gpio_sub_n(gpio)); \ + if (ANOMALY_05000311 || ANOMALY_05000323) { \ + AWA_DUMMY_READ(name); \ + hard_local_irq_restore(flags); \ + } \ return ret; \ } \ EXPORT_SYMBOL(get_gpio_ ## name); -#else -#define GET_GPIO(name) \ -unsigned short get_gpio_ ## name(unsigned gpio) \ -{ \ - return (0x01 & (gpio_bankb[gpio_bank(gpio)]->name >> gpio_sub_n(gpio))); \ -} \ -EXPORT_SYMBOL(get_gpio_ ## name); -#endif GET_GPIO(data) GET_GPIO(dir) @@ -587,27 +459,21 @@ GET_GPIO(maskb) /*Get current PORT date (16-bit word)*/ -#if ANOMALY_05000311 || ANOMALY_05000323 #define GET_GPIO_P(name) \ unsigned short get_gpiop_ ## name(unsigned gpio) \ { \ unsigned long flags; \ unsigned short ret; \ - local_irq_save(flags); \ - ret = (gpio_bankb[gpio_bank(gpio)]->name); \ - AWA_DUMMY_READ(name); \ - local_irq_restore(flags); \ + if (ANOMALY_05000311 || ANOMALY_05000323) \ + flags = hard_local_irq_save(); \ + ret = (gpio_array[gpio_bank(gpio)]->name); \ + if (ANOMALY_05000311 || ANOMALY_05000323) { \ + AWA_DUMMY_READ(name); \ + hard_local_irq_restore(flags); \ + } \ return ret; \ } \ EXPORT_SYMBOL(get_gpiop_ ## name); -#else -#define GET_GPIO_P(name) \ -unsigned short get_gpiop_ ## name(unsigned gpio) \ -{ \ - return (gpio_bankb[gpio_bank(gpio)]->name);\ -} \ -EXPORT_SYMBOL(get_gpiop_ ## name); -#endif GET_GPIO_P(data) GET_GPIO_P(dir) @@ -620,6 +486,24 @@ GET_GPIO_P(maskb) #ifdef CONFIG_PM +DECLARE_RESERVED_MAP(wakeup, GPIO_BANK_NUM); + +static const unsigned int sic_iwr_irqs[] = { +#if defined(BF533_FAMILY) + IRQ_PROG_INTB +#elif defined(BF537_FAMILY) + IRQ_PF_INTB_WATCH, IRQ_PORTG_INTB, IRQ_PH_INTB_MAC_TX +#elif defined(BF538_FAMILY) + IRQ_PORTF_INTB +#elif defined(CONFIG_BF52x) || defined(CONFIG_BF51x) + IRQ_PORTF_INTB, IRQ_PORTG_INTB, IRQ_PORTH_INTB +#elif defined(BF561_FAMILY) + IRQ_PROG0_INTB, IRQ_PROG1_INTB, IRQ_PROG2_INTB +#else +# error no SIC_IWR defined +#endif +}; + /*********************************************************** * * FUNCTIONS: Blackfin PM Setup API @@ -639,153 +523,120 @@ GET_GPIO_P(maskb) ************************************************************* * MODIFICATION HISTORY : **************************************************************/ -int gpio_pm_wakeup_request(unsigned gpio, unsigned char type) -{ - unsigned long flags; - - if ((check_gpio(gpio) < 0) || !type) - return -EINVAL; - - local_irq_save(flags); - wakeup_map[gpio_bank(gpio)] |= gpio_bit(gpio); - wakeup_flags_map[gpio] = type; - local_irq_restore(flags); - - return 0; -} -EXPORT_SYMBOL(gpio_pm_wakeup_request); - -void gpio_pm_wakeup_free(unsigned gpio) +int bfin_gpio_pm_wakeup_ctrl(unsigned gpio, unsigned ctrl) { unsigned long flags; if (check_gpio(gpio) < 0) - return; + return -EINVAL; - local_irq_save(flags); + flags = hard_local_irq_save(); + if (ctrl) + reserve(wakeup, gpio); + else + unreserve(wakeup, gpio); - wakeup_map[gpio_bank(gpio)] &= ~gpio_bit(gpio); + set_gpio_maskb(gpio, ctrl); + hard_local_irq_restore(flags); - local_irq_restore(flags); + return 0; } -EXPORT_SYMBOL(gpio_pm_wakeup_free); -static int bfin_gpio_wakeup_type(unsigned gpio, unsigned char type) +int bfin_gpio_pm_standby_ctrl(unsigned ctrl) { - port_setup(gpio, GPIO_USAGE); - set_gpio_dir(gpio, 0); - set_gpio_inen(gpio, 1); - - if (type & (PM_WAKE_RISING | PM_WAKE_FALLING)) - set_gpio_edge(gpio, 1); - else - set_gpio_edge(gpio, 0); - - if ((type & (PM_WAKE_BOTH_EDGES)) == (PM_WAKE_BOTH_EDGES)) - set_gpio_both(gpio, 1); - else - set_gpio_both(gpio, 0); - - if ((type & (PM_WAKE_FALLING | PM_WAKE_LOW))) - set_gpio_polar(gpio, 1); - else - set_gpio_polar(gpio, 0); + u16 bank, mask, i; - SSYNC(); + for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) { + mask = map_entry(wakeup, i); + bank = gpio_bank(i); + if (mask) + bfin_internal_set_wake(sic_iwr_irqs[bank], ctrl); + } return 0; } -u32 bfin_pm_setup(void) +void bfin_gpio_pm_hibernate_suspend(void) { - u16 bank, mask, i, gpio; + int i, bank; + +#ifdef BF538_FAMILY + for (i = 0; i < ARRAY_SIZE(port_fer_saved); ++i) + port_fer_saved[i] = *port_fer[i]; +#endif for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) { - mask = wakeup_map[gpio_bank(i)]; bank = gpio_bank(i); - gpio_bank_saved[bank].maskb = gpio_bankb[bank]->maskb; - gpio_bankb[bank]->maskb = 0; - - if (mask) { -#ifdef BF537_FAMILY - gpio_bank_saved[bank].fer = *port_fer[bank]; +#if defined(CONFIG_BF52x) || defined(BF537_FAMILY) || defined(CONFIG_BF51x) + gpio_bank_saved[bank].fer = *port_fer[bank]; +#if defined(CONFIG_BF52x) || defined(CONFIG_BF51x) + gpio_bank_saved[bank].mux = *port_mux[bank]; +#else + if (bank == 0) + gpio_bank_saved[bank].mux = bfin_read_PORT_MUX(); #endif - gpio_bank_saved[bank].inen = gpio_bankb[bank]->inen; - gpio_bank_saved[bank].polar = gpio_bankb[bank]->polar; - gpio_bank_saved[bank].dir = gpio_bankb[bank]->dir; - gpio_bank_saved[bank].edge = gpio_bankb[bank]->edge; - gpio_bank_saved[bank].both = gpio_bankb[bank]->both; - gpio_bank_saved[bank].reserved = - reserved_gpio_map[bank]; - - gpio = i; - - while (mask) { - if ((mask & 1) && (wakeup_flags_map[gpio] != - PM_WAKE_IGNORE)) { - reserved_gpio_map[gpio_bank(gpio)] |= - gpio_bit(gpio); - bfin_gpio_wakeup_type(gpio, - wakeup_flags_map[gpio]); - set_gpio_data(gpio, 0); /*Clear*/ - } - gpio++; - mask >>= 1; - } - - bfin_internal_set_wake(sic_iwr_irqs[bank], 1); - gpio_bankb[bank]->maskb_set = wakeup_map[gpio_bank(i)]; - } +#endif + gpio_bank_saved[bank].data = gpio_array[bank]->data; + gpio_bank_saved[bank].inen = gpio_array[bank]->inen; + gpio_bank_saved[bank].polar = gpio_array[bank]->polar; + gpio_bank_saved[bank].dir = gpio_array[bank]->dir; + gpio_bank_saved[bank].edge = gpio_array[bank]->edge; + gpio_bank_saved[bank].both = gpio_array[bank]->both; + gpio_bank_saved[bank].maska = gpio_array[bank]->maska; } - AWA_DUMMY_READ(maskb_set); +#ifdef BFIN_SPECIAL_GPIO_BANKS + bfin_special_gpio_pm_hibernate_suspend(); +#endif - return 0; + AWA_DUMMY_READ(maska); } -void bfin_pm_restore(void) +void bfin_gpio_pm_hibernate_restore(void) { - u16 bank, mask, i; + int i, bank; + +#ifdef BF538_FAMILY + for (i = 0; i < ARRAY_SIZE(port_fer_saved); ++i) + *port_fer[i] = port_fer_saved[i]; +#endif for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) { - mask = wakeup_map[gpio_bank(i)]; bank = gpio_bank(i); - if (mask) { -#ifdef BF537_FAMILY - *port_fer[bank] = gpio_bank_saved[bank].fer; +#if defined(CONFIG_BF52x) || defined(BF537_FAMILY) || defined(CONFIG_BF51x) +#if defined(CONFIG_BF52x) || defined(CONFIG_BF51x) + *port_mux[bank] = gpio_bank_saved[bank].mux; +#else + if (bank == 0) + bfin_write_PORT_MUX(gpio_bank_saved[bank].mux); #endif - gpio_bankb[bank]->inen = gpio_bank_saved[bank].inen; - gpio_bankb[bank]->dir = gpio_bank_saved[bank].dir; - gpio_bankb[bank]->polar = gpio_bank_saved[bank].polar; - gpio_bankb[bank]->edge = gpio_bank_saved[bank].edge; - gpio_bankb[bank]->both = gpio_bank_saved[bank].both; - - reserved_gpio_map[bank] = - gpio_bank_saved[bank].reserved; - bfin_internal_set_wake(sic_iwr_irqs[bank], 0); - } - - gpio_bankb[bank]->maskb = gpio_bank_saved[bank].maskb; + *port_fer[bank] = gpio_bank_saved[bank].fer; +#endif + gpio_array[bank]->inen = gpio_bank_saved[bank].inen; + gpio_array[bank]->data_set = gpio_bank_saved[bank].data + & gpio_bank_saved[bank].dir; + gpio_array[bank]->dir = gpio_bank_saved[bank].dir; + gpio_array[bank]->polar = gpio_bank_saved[bank].polar; + gpio_array[bank]->edge = gpio_bank_saved[bank].edge; + gpio_array[bank]->both = gpio_bank_saved[bank].both; + gpio_array[bank]->maska = gpio_bank_saved[bank].maska; } - AWA_DUMMY_READ(maskb); -} +#ifdef BFIN_SPECIAL_GPIO_BANKS + bfin_special_gpio_pm_hibernate_restore(); #endif -#else /* BF548_FAMILY */ -unsigned short get_gpio_dir(unsigned gpio) -{ - return (0x01 & (gpio_array[gpio_bank(gpio)]->port_dir_clear >> gpio_sub_n(gpio))); + AWA_DUMMY_READ(maska); } -EXPORT_SYMBOL(get_gpio_dir); -#endif /* BF548_FAMILY */ + +#endif /*********************************************************** * -* FUNCTIONS: Blackfin Peripheral Resource Allocation +* FUNCTIONS: Blackfin Peripheral Resource Allocation * and PortMux Setup * * INPUTS/OUTPUTS: @@ -799,7 +650,6 @@ EXPORT_SYMBOL(get_gpio_dir); * MODIFICATION HISTORY : **************************************************************/ -#ifdef BF548_FAMILY int peripheral_request(unsigned short per, const char *label) { unsigned long flags; @@ -815,136 +665,67 @@ int peripheral_request(unsigned short per, const char *label) if (!(per & P_DEFINED)) return -ENODEV; - if (check_gpio(ident) < 0) - return -EINVAL; + BUG_ON(ident >= MAX_RESOURCES); - local_irq_save(flags); + flags = hard_local_irq_save(); - if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) { + /* If a pin can be muxed as either GPIO or peripheral, make + * sure it is not already a GPIO pin when we request it. + */ + if (unlikely(!check_gpio(ident) && is_reserved(gpio, ident, 1))) { + if (system_state == SYSTEM_BOOTING) + dump_stack(); 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); + "%s: Peripheral %d is already reserved as GPIO by %s !\n", + __func__, ident, get_label(ident)); + hard_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)))) { + if (unlikely(is_reserved(peri, ident, 1))) { /* - * Allow that the identical pin function can - * be requested from the same driver twice + * Pin functions like AMC address strobes my + * be requested and used by several drivers */ - if (cmp_label(ident, label) == 0) - goto anyway; + if (!(per & P_MAYSHARE)) { + /* + * Allow that the identical pin function can + * be requested from the same driver twice + */ + + if (cmp_label(ident, label) == 0) + goto anyway; + if (system_state == SYSTEM_BOOTING) + dump_stack(); 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); + __func__, ident, P_FUNCT2MUX(per), get_label(ident)); + hard_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) -{ - 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; - - local_irq_save(flags); - - if (!check_gpio(ident)) { - - 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); + if (unlikely(portmux_group_check(per))) { + hard_local_irq_restore(flags); return -EBUSY; } + anyway: + reserve(peri, ident); - } - - if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) { - - /* - * Pin functions like AMC address strobes my - * be requested and used by several drivers - */ - - if (!(per & P_MAYSHARE)) { - - /* - * 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: - portmux_setup(per, P_FUNCT2MUX(per)); - + portmux_setup(per); port_setup(ident, PERIPHERAL_USAGE); - reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident); - local_irq_restore(flags); + hard_local_irq_restore(flags); set_label(ident, label); return 0; } EXPORT_SYMBOL(peripheral_request); -#endif -int peripheral_request_list(unsigned short per[], const char *label) +int peripheral_request_list(const unsigned short per[], const char *label) { u16 cnt; int ret; @@ -954,10 +735,10 @@ int peripheral_request_list(unsigned short per[], const char *label) ret = peripheral_request(per[cnt], label); if (ret < 0) { - for ( ; cnt > 0; cnt--) { + for ( ; cnt > 0; cnt--) peripheral_free(per[cnt - 1]); - } - return ret; + + return ret; } } @@ -976,37 +757,29 @@ void peripheral_free(unsigned short per) if (!(per & P_DEFINED)) return; - if (check_gpio(ident) < 0) - return; - - local_irq_save(flags); + flags = hard_local_irq_save(); - if (unlikely(!(reserved_peri_map[gpio_bank(ident)] - & gpio_bit(ident)))) { - local_irq_restore(flags); + if (unlikely(!is_reserved(peri, ident, 0))) { + hard_local_irq_restore(flags); return; } - if (!(per & P_MAYSHARE)) { + if (!(per & P_MAYSHARE)) port_setup(ident, GPIO_USAGE); - } - reserved_peri_map[gpio_bank(ident)] &= ~gpio_bit(ident); + unreserve(peri, ident); set_label(ident, "free"); - local_irq_restore(flags); + hard_local_irq_restore(flags); } EXPORT_SYMBOL(peripheral_free); -void peripheral_free_list(unsigned short per[]) +void peripheral_free_list(const unsigned short per[]) { u16 cnt; - - for (cnt = 0; per[cnt] != 0; cnt++) { + for (cnt = 0; per[cnt] != 0; cnt++) peripheral_free(per[cnt]); - } - } EXPORT_SYMBOL(peripheral_free_list); @@ -1025,14 +798,14 @@ EXPORT_SYMBOL(peripheral_free_list); * MODIFICATION HISTORY : **************************************************************/ -int gpio_request(unsigned gpio, const char *label) +int bfin_gpio_request(unsigned gpio, const char *label) { unsigned long flags; if (check_gpio(gpio) < 0) return -EINVAL; - local_irq_save(flags); + flags = hard_local_irq_save(); /* * Allow that the identical GPIO can @@ -1041,162 +814,275 @@ int gpio_request(unsigned gpio, const char *label) */ if (cmp_label(gpio, label) == 0) { - local_irq_restore(flags); + hard_local_irq_restore(flags); return 0; } - if (unlikely(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) { + if (unlikely(is_reserved(gpio, gpio, 1))) { + if (system_state == SYSTEM_BOOTING) + dump_stack(); printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved by %s !\n", - gpio, get_label(gpio)); - dump_stack(); - local_irq_restore(flags); + gpio, get_label(gpio)); + hard_local_irq_restore(flags); return -EBUSY; } - if (unlikely(reserved_peri_map[gpio_bank(gpio)] & gpio_bit(gpio))) { + if (unlikely(is_reserved(peri, gpio, 1))) { + if (system_state == SYSTEM_BOOTING) + dump_stack(); 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); + hard_local_irq_restore(flags); return -EBUSY; } + if (unlikely(is_reserved(gpio_irq, gpio, 1))) { + printk(KERN_NOTICE "bfin-gpio: GPIO %d is already reserved as gpio-irq!" + " (Documentation/blackfin/bfin-gpio-notes.txt)\n", gpio); + } else { /* Reset POLAR setting when acquiring a gpio for the first time */ + set_gpio_polar(gpio, 0); + } - reserved_gpio_map[gpio_bank(gpio)] |= gpio_bit(gpio); + reserve(gpio, gpio); + set_label(gpio, label); - local_irq_restore(flags); + hard_local_irq_restore(flags); port_setup(gpio, GPIO_USAGE); - set_label(gpio, label); return 0; } -EXPORT_SYMBOL(gpio_request); +EXPORT_SYMBOL(bfin_gpio_request); -void gpio_free(unsigned gpio) +void bfin_gpio_free(unsigned gpio) { unsigned long flags; if (check_gpio(gpio) < 0) return; - local_irq_save(flags); + might_sleep(); + + flags = hard_local_irq_save(); - if (unlikely(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)))) { + if (unlikely(!is_reserved(gpio, gpio, 0))) { + if (system_state == SYSTEM_BOOTING) + dump_stack(); gpio_error(gpio); - dump_stack(); - local_irq_restore(flags); + hard_local_irq_restore(flags); return; } - default_gpio(gpio); - - reserved_gpio_map[gpio_bank(gpio)] &= ~gpio_bit(gpio); + unreserve(gpio, gpio); set_label(gpio, "free"); - local_irq_restore(flags); + hard_local_irq_restore(flags); } -EXPORT_SYMBOL(gpio_free); +EXPORT_SYMBOL(bfin_gpio_free); +#ifdef BFIN_SPECIAL_GPIO_BANKS +DECLARE_RESERVED_MAP(special_gpio, gpio_bank(MAX_RESOURCES)); -#ifdef BF548_FAMILY -int gpio_direction_input(unsigned gpio) +int bfin_special_gpio_request(unsigned gpio, const char *label) { unsigned long flags; - if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) { - gpio_error(gpio); - return -EINVAL; + flags = hard_local_irq_save(); + + /* + * Allow that the identical GPIO can + * be requested from the same driver twice + * Do nothing and return - + */ + + if (cmp_label(gpio, label) == 0) { + hard_local_irq_restore(flags); + return 0; } - 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); + if (unlikely(is_reserved(special_gpio, gpio, 1))) { + hard_local_irq_restore(flags); + printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved by %s !\n", + gpio, get_label(gpio)); + + return -EBUSY; + } + if (unlikely(is_reserved(peri, gpio, 1))) { + hard_local_irq_restore(flags); + printk(KERN_ERR + "bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n", + gpio, get_label(gpio)); + + return -EBUSY; + } + + reserve(special_gpio, gpio); + reserve(peri, gpio); + + set_label(gpio, label); + hard_local_irq_restore(flags); + port_setup(gpio, GPIO_USAGE); return 0; } -EXPORT_SYMBOL(gpio_direction_input); +EXPORT_SYMBOL(bfin_special_gpio_request); -int gpio_direction_output(unsigned gpio, int value) +void bfin_special_gpio_free(unsigned gpio) { unsigned long flags; - if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) { + might_sleep(); + + flags = hard_local_irq_save(); + + if (unlikely(!is_reserved(special_gpio, gpio, 0))) { gpio_error(gpio); + hard_local_irq_restore(flags); + return; + } + + unreserve(special_gpio, gpio); + unreserve(peri, gpio); + set_label(gpio, "free"); + hard_local_irq_restore(flags); +} +EXPORT_SYMBOL(bfin_special_gpio_free); +#endif + + +int bfin_gpio_irq_request(unsigned gpio, const char *label) +{ + unsigned long flags; + + if (check_gpio(gpio) < 0) return -EINVAL; + + flags = hard_local_irq_save(); + + if (unlikely(is_reserved(peri, gpio, 1))) { + if (system_state == SYSTEM_BOOTING) + dump_stack(); + printk(KERN_ERR + "bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n", + gpio, get_label(gpio)); + hard_local_irq_restore(flags); + return -EBUSY; } + if (unlikely(is_reserved(gpio, gpio, 1))) + printk(KERN_NOTICE "bfin-gpio: GPIO %d is already reserved by %s! " + "(Documentation/blackfin/bfin-gpio-notes.txt)\n", + gpio, get_label(gpio)); - local_irq_save(flags); - gpio_array[gpio_bank(gpio)]->port_inen &= ~gpio_bit(gpio); - gpio_set_value(gpio, value); - gpio_array[gpio_bank(gpio)]->port_dir_set = gpio_bit(gpio); - local_irq_restore(flags); + reserve(gpio_irq, gpio); + set_label(gpio, label); + + hard_local_irq_restore(flags); + + port_setup(gpio, GPIO_USAGE); return 0; } -EXPORT_SYMBOL(gpio_direction_output); -void gpio_set_value(unsigned gpio, int arg) +void bfin_gpio_irq_free(unsigned gpio) { - if (arg) - gpio_array[gpio_bank(gpio)]->port_set = gpio_bit(gpio); - else - gpio_array[gpio_bank(gpio)]->port_clear = gpio_bit(gpio); + unsigned long flags; + + if (check_gpio(gpio) < 0) + return; + + flags = hard_local_irq_save(); + + if (unlikely(!is_reserved(gpio_irq, gpio, 0))) { + if (system_state == SYSTEM_BOOTING) + dump_stack(); + gpio_error(gpio); + hard_local_irq_restore(flags); + return; + } + + unreserve(gpio_irq, gpio); + + set_label(gpio, "free"); + + hard_local_irq_restore(flags); } -EXPORT_SYMBOL(gpio_set_value); -int gpio_get_value(unsigned gpio) +static inline void __bfin_gpio_direction_input(unsigned gpio) { - return (1 & (gpio_array[gpio_bank(gpio)]->port_data >> gpio_sub_n(gpio))); + gpio_array[gpio_bank(gpio)]->dir &= ~gpio_bit(gpio); + gpio_array[gpio_bank(gpio)]->inen |= gpio_bit(gpio); } -EXPORT_SYMBOL(gpio_get_value); - -#else -int gpio_direction_input(unsigned gpio) +int bfin_gpio_direction_input(unsigned gpio) { unsigned long flags; - if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) { + if (unlikely(!is_reserved(gpio, gpio, 0))) { gpio_error(gpio); return -EINVAL; } - local_irq_save(flags); - gpio_bankb[gpio_bank(gpio)]->dir &= ~gpio_bit(gpio); - gpio_bankb[gpio_bank(gpio)]->inen |= gpio_bit(gpio); + flags = hard_local_irq_save(); + __bfin_gpio_direction_input(gpio); AWA_DUMMY_READ(inen); - local_irq_restore(flags); + hard_local_irq_restore(flags); return 0; } -EXPORT_SYMBOL(gpio_direction_input); +EXPORT_SYMBOL(bfin_gpio_direction_input); -int gpio_direction_output(unsigned gpio, int value) +void bfin_gpio_irq_prepare(unsigned gpio) +{ + port_setup(gpio, GPIO_USAGE); +} + +void bfin_gpio_set_value(unsigned gpio, int arg) +{ + if (arg) + gpio_array[gpio_bank(gpio)]->data_set = gpio_bit(gpio); + else + gpio_array[gpio_bank(gpio)]->data_clear = gpio_bit(gpio); +} +EXPORT_SYMBOL(bfin_gpio_set_value); + +int bfin_gpio_direction_output(unsigned gpio, int value) { unsigned long flags; - if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) { + if (unlikely(!is_reserved(gpio, gpio, 0))) { gpio_error(gpio); return -EINVAL; } - local_irq_save(flags); - gpio_bankb[gpio_bank(gpio)]->inen &= ~gpio_bit(gpio); + flags = hard_local_irq_save(); - if (value) - gpio_bankb[gpio_bank(gpio)]->data_set = gpio_bit(gpio); - else - gpio_bankb[gpio_bank(gpio)]->data_clear = gpio_bit(gpio); + gpio_array[gpio_bank(gpio)]->inen &= ~gpio_bit(gpio); + gpio_set_value(gpio, value); + gpio_array[gpio_bank(gpio)]->dir |= gpio_bit(gpio); - gpio_bankb[gpio_bank(gpio)]->dir |= gpio_bit(gpio); AWA_DUMMY_READ(dir); - local_irq_restore(flags); + hard_local_irq_restore(flags); return 0; } -EXPORT_SYMBOL(gpio_direction_output); +EXPORT_SYMBOL(bfin_gpio_direction_output); + +int bfin_gpio_get_value(unsigned gpio) +{ + unsigned long flags; + + if (unlikely(get_gpio_edge(gpio))) { + int ret; + flags = hard_local_irq_save(); + set_gpio_edge(gpio, 0); + ret = get_gpio_data(gpio); + set_gpio_edge(gpio, 1); + hard_local_irq_restore(flags); + return ret; + } else + return get_gpio_data(gpio); +} +EXPORT_SYMBOL(bfin_gpio_get_value); /* If we are booting from SPI and our board lacks a strong enough pull up, * the core can reset and execute the bootrom faster than the resistor can @@ -1208,46 +1094,110 @@ EXPORT_SYMBOL(gpio_direction_output); * lives here as we need to force all the GPIO states w/out going through * BUG() checks and such. */ -void bfin_gpio_reset_spi0_ssel1(void) +void bfin_reset_boot_spi_cs(unsigned short pin) { - u16 gpio = P_IDENT(P_SPI0_SSEL1); - + unsigned short gpio = P_IDENT(pin); port_setup(gpio, GPIO_USAGE); - gpio_bankb[gpio_bank(gpio)]->data_set = gpio_bit(gpio); + gpio_array[gpio_bank(gpio)]->data_set = gpio_bit(gpio); AWA_DUMMY_READ(data_set); udelay(1); } -#endif /*BF548_FAMILY */ - #if defined(CONFIG_PROC_FS) -static int gpio_proc_read(char *buf, char **start, off_t offset, - int len, int *unused_i, void *unused_v) +static int gpio_proc_show(struct seq_file *m, void *v) { - int c, outlen = 0; + int c, irq, gpio; for (c = 0; c < MAX_RESOURCES; c++) { - if (!check_gpio(c) && (reserved_gpio_map[gpio_bank(c)] & gpio_bit(c))) - len = sprintf(buf, "GPIO_%d: %s \t\tGPIO %s\n", c, - get_label(c), get_gpio_dir(c) ? "OUTPUT" : "INPUT"); - else if (reserved_peri_map[gpio_bank(c)] & gpio_bit(c)) - len = sprintf(buf, "GPIO_%d: %s \t\tPeripheral\n", c, get_label(c)); + irq = is_reserved(gpio_irq, c, 1); + gpio = is_reserved(gpio, c, 1); + if (!check_gpio(c) && (gpio || irq)) + seq_printf(m, "GPIO_%d: \t%s%s \t\tGPIO %s\n", c, + get_label(c), (gpio && irq) ? " *" : "", + get_gpio_dir(c) ? "OUTPUT" : "INPUT"); + else if (is_reserved(peri, c, 1)) + seq_printf(m, "GPIO_%d: \t%s \t\tPeripheral\n", c, get_label(c)); else continue; - buf += len; - outlen += len; } - return outlen; + + return 0; } +static int gpio_proc_open(struct inode *inode, struct file *file) +{ + return single_open(file, gpio_proc_show, NULL); +} + +static const struct file_operations gpio_proc_ops = { + .open = gpio_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + static __init int gpio_register_proc(void) { struct proc_dir_entry *proc_gpio; - proc_gpio = create_proc_entry("gpio", S_IRUGO, NULL); - if (proc_gpio) - proc_gpio->read_proc = gpio_proc_read; - return proc_gpio != NULL; + proc_gpio = proc_create("gpio", 0, NULL, &gpio_proc_ops); + return proc_gpio == NULL; } __initcall(gpio_register_proc); #endif + +#ifdef CONFIG_GPIOLIB +static int bfin_gpiolib_direction_input(struct gpio_chip *chip, unsigned gpio) +{ + return bfin_gpio_direction_input(gpio); +} + +static int bfin_gpiolib_direction_output(struct gpio_chip *chip, unsigned gpio, int level) +{ + return bfin_gpio_direction_output(gpio, level); +} + +static int bfin_gpiolib_get_value(struct gpio_chip *chip, unsigned gpio) +{ + return bfin_gpio_get_value(gpio); +} + +static void bfin_gpiolib_set_value(struct gpio_chip *chip, unsigned gpio, int value) +{ + return bfin_gpio_set_value(gpio, value); +} + +static int bfin_gpiolib_gpio_request(struct gpio_chip *chip, unsigned gpio) +{ + return bfin_gpio_request(gpio, chip->label); +} + +static void bfin_gpiolib_gpio_free(struct gpio_chip *chip, unsigned gpio) +{ + return bfin_gpio_free(gpio); +} + +static int bfin_gpiolib_gpio_to_irq(struct gpio_chip *chip, unsigned gpio) +{ + return gpio + GPIO_IRQ_BASE; +} + +static struct gpio_chip bfin_chip = { + .label = "BFIN-GPIO", + .direction_input = bfin_gpiolib_direction_input, + .get = bfin_gpiolib_get_value, + .direction_output = bfin_gpiolib_direction_output, + .set = bfin_gpiolib_set_value, + .request = bfin_gpiolib_gpio_request, + .free = bfin_gpiolib_gpio_free, + .to_irq = bfin_gpiolib_gpio_to_irq, + .base = 0, + .ngpio = MAX_BLACKFIN_GPIOS, +}; + +static int __init bfin_gpiolib_setup(void) +{ + return gpiochip_add(&bfin_chip); +} +arch_initcall(bfin_gpiolib_setup); +#endif |