803a8d2acb
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
1254 lines
30 KiB
C
1254 lines
30 KiB
C
/*
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* File: arch/blackfin/kernel/bfin_gpio.c
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* Based on:
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* Author: Michael Hennerich (hennerich@blackfin.uclinux.org)
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*
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* Created:
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* Description: GPIO Abstraction Layer
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*
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* Modified:
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* Copyright 2008 Analog Devices Inc.
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*
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* Bugs: Enter bugs at http://blackfin.uclinux.org/
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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; either version 2 of the License, or
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* (at your option) any later version.
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see the file COPYING, or write
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* to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* Number BF537/6/4 BF561 BF533/2/1 BF549/8/4/2
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*
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* GPIO_0 PF0 PF0 PF0 PA0...PJ13
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* GPIO_1 PF1 PF1 PF1
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* GPIO_2 PF2 PF2 PF2
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* GPIO_3 PF3 PF3 PF3
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* GPIO_4 PF4 PF4 PF4
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* GPIO_5 PF5 PF5 PF5
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* GPIO_6 PF6 PF6 PF6
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* GPIO_7 PF7 PF7 PF7
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* GPIO_8 PF8 PF8 PF8
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* GPIO_9 PF9 PF9 PF9
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* GPIO_10 PF10 PF10 PF10
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* GPIO_11 PF11 PF11 PF11
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* GPIO_12 PF12 PF12 PF12
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* GPIO_13 PF13 PF13 PF13
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* GPIO_14 PF14 PF14 PF14
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* GPIO_15 PF15 PF15 PF15
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* GPIO_16 PG0 PF16
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* GPIO_17 PG1 PF17
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* GPIO_18 PG2 PF18
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* GPIO_19 PG3 PF19
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* GPIO_20 PG4 PF20
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* GPIO_21 PG5 PF21
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* GPIO_22 PG6 PF22
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* GPIO_23 PG7 PF23
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* GPIO_24 PG8 PF24
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* GPIO_25 PG9 PF25
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* GPIO_26 PG10 PF26
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* GPIO_27 PG11 PF27
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* GPIO_28 PG12 PF28
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* GPIO_29 PG13 PF29
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* GPIO_30 PG14 PF30
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* GPIO_31 PG15 PF31
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* GPIO_32 PH0 PF32
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* GPIO_33 PH1 PF33
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* GPIO_34 PH2 PF34
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* GPIO_35 PH3 PF35
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* GPIO_36 PH4 PF36
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* GPIO_37 PH5 PF37
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* GPIO_38 PH6 PF38
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* GPIO_39 PH7 PF39
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* GPIO_40 PH8 PF40
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* GPIO_41 PH9 PF41
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* GPIO_42 PH10 PF42
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* GPIO_43 PH11 PF43
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* GPIO_44 PH12 PF44
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* GPIO_45 PH13 PF45
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* GPIO_46 PH14 PF46
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* GPIO_47 PH15 PF47
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*/
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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/proc_fs.h>
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#include <asm/blackfin.h>
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#include <asm/gpio.h>
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#include <asm/portmux.h>
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#include <linux/irq.h>
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#if ANOMALY_05000311 || ANOMALY_05000323
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enum {
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AWA_data = SYSCR,
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AWA_data_clear = SYSCR,
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AWA_data_set = SYSCR,
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AWA_toggle = SYSCR,
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AWA_maska = BFIN_UART_SCR,
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AWA_maska_clear = BFIN_UART_SCR,
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AWA_maska_set = BFIN_UART_SCR,
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AWA_maska_toggle = BFIN_UART_SCR,
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AWA_maskb = BFIN_UART_GCTL,
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AWA_maskb_clear = BFIN_UART_GCTL,
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AWA_maskb_set = BFIN_UART_GCTL,
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AWA_maskb_toggle = BFIN_UART_GCTL,
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AWA_dir = SPORT1_STAT,
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AWA_polar = SPORT1_STAT,
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AWA_edge = SPORT1_STAT,
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AWA_both = SPORT1_STAT,
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#if ANOMALY_05000311
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AWA_inen = TIMER_ENABLE,
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#elif ANOMALY_05000323
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AWA_inen = DMA1_1_CONFIG,
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#endif
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};
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/* Anomaly Workaround */
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#define AWA_DUMMY_READ(name) bfin_read16(AWA_ ## name)
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#else
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#define AWA_DUMMY_READ(...) do { } while (0)
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#endif
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#ifdef BF533_FAMILY
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static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
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(struct gpio_port_t *) FIO_FLAG_D,
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};
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#endif
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#if defined(BF527_FAMILY) || defined(BF537_FAMILY)
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static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
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(struct gpio_port_t *) PORTFIO,
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(struct gpio_port_t *) PORTGIO,
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(struct gpio_port_t *) PORTHIO,
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};
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static unsigned short *port_fer[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
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(unsigned short *) PORTF_FER,
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(unsigned short *) PORTG_FER,
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(unsigned short *) PORTH_FER,
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};
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#endif
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#ifdef BF527_FAMILY
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static unsigned short *port_mux[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
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(unsigned short *) PORTF_MUX,
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(unsigned short *) PORTG_MUX,
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(unsigned short *) PORTH_MUX,
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};
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static const
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u8 pmux_offset[][16] =
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{{ 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 4, 6, 8, 8, 10, 10 }, /* PORTF */
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{ 0, 0, 0, 0, 0, 2, 2, 4, 4, 6, 8, 10, 10, 10, 12, 12 }, /* PORTG */
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{ 0, 0, 0, 0, 0, 0, 0, 0, 2, 4, 4, 4, 4, 4, 4, 4 }, /* PORTH */
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};
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#endif
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#ifdef BF561_FAMILY
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static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
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(struct gpio_port_t *) FIO0_FLAG_D,
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(struct gpio_port_t *) FIO1_FLAG_D,
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(struct gpio_port_t *) FIO2_FLAG_D,
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};
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#endif
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#ifdef BF548_FAMILY
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static struct gpio_port_t *gpio_array[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
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(struct gpio_port_t *)PORTA_FER,
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(struct gpio_port_t *)PORTB_FER,
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(struct gpio_port_t *)PORTC_FER,
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(struct gpio_port_t *)PORTD_FER,
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(struct gpio_port_t *)PORTE_FER,
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(struct gpio_port_t *)PORTF_FER,
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(struct gpio_port_t *)PORTG_FER,
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(struct gpio_port_t *)PORTH_FER,
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(struct gpio_port_t *)PORTI_FER,
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(struct gpio_port_t *)PORTJ_FER,
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};
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#endif
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static unsigned short reserved_gpio_map[gpio_bank(MAX_BLACKFIN_GPIOS)];
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static unsigned short reserved_peri_map[gpio_bank(MAX_RESOURCES)];
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#define RESOURCE_LABEL_SIZE 16
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static struct str_ident {
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char name[RESOURCE_LABEL_SIZE];
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} str_ident[MAX_RESOURCES];
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#if defined(CONFIG_PM) && !defined(CONFIG_BF54x)
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static unsigned short wakeup_map[gpio_bank(MAX_BLACKFIN_GPIOS)];
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static unsigned char wakeup_flags_map[MAX_BLACKFIN_GPIOS];
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static struct gpio_port_s gpio_bank_saved[gpio_bank(MAX_BLACKFIN_GPIOS)];
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#ifdef BF533_FAMILY
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static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG_INTB};
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#endif
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#ifdef BF537_FAMILY
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static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG_INTB, IRQ_PORTG_INTB, IRQ_MAC_TX};
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#endif
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#ifdef BF527_FAMILY
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static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PORTF_INTB, IRQ_PORTG_INTB, IRQ_PORTH_INTB};
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#endif
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#ifdef BF561_FAMILY
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static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG0_INTB, IRQ_PROG1_INTB, IRQ_PROG2_INTB};
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#endif
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#endif /* CONFIG_PM */
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#if defined(BF548_FAMILY)
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inline int check_gpio(unsigned gpio)
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{
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if (gpio == GPIO_PB15 || gpio == GPIO_PC14 || gpio == GPIO_PC15
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|| gpio == GPIO_PH14 || gpio == GPIO_PH15
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|| gpio == GPIO_PJ14 || gpio == GPIO_PJ15
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|| gpio > MAX_BLACKFIN_GPIOS)
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return -EINVAL;
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return 0;
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}
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#else
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inline int check_gpio(unsigned gpio)
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{
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if (gpio >= MAX_BLACKFIN_GPIOS)
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return -EINVAL;
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return 0;
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}
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#endif
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void gpio_error(unsigned gpio)
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{
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printk(KERN_ERR "bfin-gpio: GPIO %d wasn't requested!\n", gpio);
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}
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static void set_label(unsigned short ident, const char *label)
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{
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if (label && str_ident) {
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strncpy(str_ident[ident].name, label,
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RESOURCE_LABEL_SIZE);
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str_ident[ident].name[RESOURCE_LABEL_SIZE - 1] = 0;
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}
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}
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static char *get_label(unsigned short ident)
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{
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if (!str_ident)
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return "UNKNOWN";
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return (*str_ident[ident].name ? str_ident[ident].name : "UNKNOWN");
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}
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static int cmp_label(unsigned short ident, const char *label)
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{
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if (label == NULL) {
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dump_stack();
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printk(KERN_ERR "Please provide none-null label\n");
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}
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if (label && str_ident)
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return strncmp(str_ident[ident].name,
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label, strlen(label));
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else
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return -EINVAL;
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}
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#if defined(BF527_FAMILY) || defined(BF537_FAMILY)
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static void port_setup(unsigned gpio, unsigned short usage)
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{
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if (!check_gpio(gpio)) {
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if (usage == GPIO_USAGE)
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*port_fer[gpio_bank(gpio)] &= ~gpio_bit(gpio);
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else
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*port_fer[gpio_bank(gpio)] |= gpio_bit(gpio);
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SSYNC();
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}
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}
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#elif defined(BF548_FAMILY)
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static void port_setup(unsigned gpio, unsigned short usage)
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{
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if (usage == GPIO_USAGE)
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gpio_array[gpio_bank(gpio)]->port_fer &= ~gpio_bit(gpio);
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else
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gpio_array[gpio_bank(gpio)]->port_fer |= gpio_bit(gpio);
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SSYNC();
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}
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#else
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# define port_setup(...) do { } while (0)
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#endif
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#ifdef BF537_FAMILY
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static struct {
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unsigned short res;
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unsigned short offset;
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} port_mux_lut[] = {
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{.res = P_PPI0_D13, .offset = 11},
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{.res = P_PPI0_D14, .offset = 11},
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{.res = P_PPI0_D15, .offset = 11},
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{.res = P_SPORT1_TFS, .offset = 11},
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{.res = P_SPORT1_TSCLK, .offset = 11},
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{.res = P_SPORT1_DTPRI, .offset = 11},
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{.res = P_PPI0_D10, .offset = 10},
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{.res = P_PPI0_D11, .offset = 10},
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{.res = P_PPI0_D12, .offset = 10},
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{.res = P_SPORT1_RSCLK, .offset = 10},
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{.res = P_SPORT1_RFS, .offset = 10},
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{.res = P_SPORT1_DRPRI, .offset = 10},
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{.res = P_PPI0_D8, .offset = 9},
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{.res = P_PPI0_D9, .offset = 9},
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{.res = P_SPORT1_DRSEC, .offset = 9},
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{.res = P_SPORT1_DTSEC, .offset = 9},
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{.res = P_TMR2, .offset = 8},
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{.res = P_PPI0_FS3, .offset = 8},
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{.res = P_TMR3, .offset = 7},
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{.res = P_SPI0_SSEL4, .offset = 7},
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{.res = P_TMR4, .offset = 6},
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{.res = P_SPI0_SSEL5, .offset = 6},
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{.res = P_TMR5, .offset = 5},
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{.res = P_SPI0_SSEL6, .offset = 5},
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{.res = P_UART1_RX, .offset = 4},
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{.res = P_UART1_TX, .offset = 4},
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{.res = P_TMR6, .offset = 4},
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{.res = P_TMR7, .offset = 4},
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{.res = P_UART0_RX, .offset = 3},
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{.res = P_UART0_TX, .offset = 3},
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{.res = P_DMAR0, .offset = 3},
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{.res = P_DMAR1, .offset = 3},
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{.res = P_SPORT0_DTSEC, .offset = 1},
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{.res = P_SPORT0_DRSEC, .offset = 1},
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{.res = P_CAN0_RX, .offset = 1},
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{.res = P_CAN0_TX, .offset = 1},
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{.res = P_SPI0_SSEL7, .offset = 1},
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{.res = P_SPORT0_TFS, .offset = 0},
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{.res = P_SPORT0_DTPRI, .offset = 0},
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{.res = P_SPI0_SSEL2, .offset = 0},
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{.res = P_SPI0_SSEL3, .offset = 0},
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};
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static void portmux_setup(unsigned short per, unsigned short function)
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{
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u16 y, offset, muxreg;
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for (y = 0; y < ARRAY_SIZE(port_mux_lut); y++) {
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if (port_mux_lut[y].res == per) {
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/* SET PORTMUX REG */
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offset = port_mux_lut[y].offset;
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muxreg = bfin_read_PORT_MUX();
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if (offset != 1)
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muxreg &= ~(1 << offset);
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else
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muxreg &= ~(3 << 1);
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muxreg |= (function << offset);
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bfin_write_PORT_MUX(muxreg);
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}
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}
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}
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#elif defined(BF548_FAMILY)
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inline void portmux_setup(unsigned short portno, unsigned short function)
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{
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u32 pmux;
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pmux = gpio_array[gpio_bank(portno)]->port_mux;
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pmux &= ~(0x3 << (2 * gpio_sub_n(portno)));
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pmux |= (function & 0x3) << (2 * gpio_sub_n(portno));
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gpio_array[gpio_bank(portno)]->port_mux = pmux;
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}
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inline u16 get_portmux(unsigned short portno)
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{
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u32 pmux;
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pmux = gpio_array[gpio_bank(portno)]->port_mux;
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return (pmux >> (2 * gpio_sub_n(portno)) & 0x3);
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}
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#elif defined(BF527_FAMILY)
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inline void portmux_setup(unsigned short portno, unsigned short function)
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{
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u16 pmux, ident = P_IDENT(portno);
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u8 offset = pmux_offset[gpio_bank(ident)][gpio_sub_n(ident)];
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pmux = *port_mux[gpio_bank(ident)];
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pmux &= ~(3 << offset);
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pmux |= (function & 3) << offset;
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*port_mux[gpio_bank(ident)] = pmux;
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SSYNC();
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}
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#else
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# define portmux_setup(...) do { } while (0)
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#endif
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static int __init bfin_gpio_init(void)
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{
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printk(KERN_INFO "Blackfin GPIO Controller\n");
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return 0;
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}
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arch_initcall(bfin_gpio_init);
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#ifndef BF548_FAMILY
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/***********************************************************
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*
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* FUNCTIONS: Blackfin General Purpose Ports Access Functions
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*
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* INPUTS/OUTPUTS:
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* gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
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*
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*
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* DESCRIPTION: These functions abstract direct register access
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* to Blackfin processor General Purpose
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* Ports Regsiters
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*
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* CAUTION: These functions do not belong to the GPIO Driver API
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*************************************************************
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* MODIFICATION HISTORY :
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**************************************************************/
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/* Set a specific bit */
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#define SET_GPIO(name) \
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void set_gpio_ ## name(unsigned gpio, unsigned short arg) \
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{ \
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unsigned long flags; \
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local_irq_save(flags); \
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if (arg) \
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gpio_bankb[gpio_bank(gpio)]->name |= gpio_bit(gpio); \
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else \
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gpio_bankb[gpio_bank(gpio)]->name &= ~gpio_bit(gpio); \
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AWA_DUMMY_READ(name); \
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local_irq_restore(flags); \
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} \
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EXPORT_SYMBOL(set_gpio_ ## name);
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SET_GPIO(dir)
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SET_GPIO(inen)
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SET_GPIO(polar)
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SET_GPIO(edge)
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SET_GPIO(both)
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#if ANOMALY_05000311 || ANOMALY_05000323
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#define SET_GPIO_SC(name) \
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void set_gpio_ ## name(unsigned gpio, unsigned short arg) \
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{ \
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unsigned long flags; \
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local_irq_save(flags); \
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if (arg) \
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gpio_bankb[gpio_bank(gpio)]->name ## _set = gpio_bit(gpio); \
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else \
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gpio_bankb[gpio_bank(gpio)]->name ## _clear = gpio_bit(gpio); \
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AWA_DUMMY_READ(name); \
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local_irq_restore(flags); \
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} \
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EXPORT_SYMBOL(set_gpio_ ## name);
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#else
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#define SET_GPIO_SC(name) \
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void set_gpio_ ## name(unsigned gpio, unsigned short arg) \
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{ \
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if (arg) \
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gpio_bankb[gpio_bank(gpio)]->name ## _set = gpio_bit(gpio); \
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else \
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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);
|
|
}
|
|
#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; \
|
|
} \
|
|
EXPORT_SYMBOL(set_gpiop_ ## name);
|
|
#endif
|
|
|
|
SET_GPIO_P(data)
|
|
SET_GPIO_P(dir)
|
|
SET_GPIO_P(inen)
|
|
SET_GPIO_P(polar)
|
|
SET_GPIO_P(edge)
|
|
SET_GPIO_P(both)
|
|
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); \
|
|
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)
|
|
GET_GPIO(inen)
|
|
GET_GPIO(polar)
|
|
GET_GPIO(edge)
|
|
GET_GPIO(both)
|
|
GET_GPIO(maska)
|
|
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); \
|
|
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)
|
|
GET_GPIO_P(inen)
|
|
GET_GPIO_P(polar)
|
|
GET_GPIO_P(edge)
|
|
GET_GPIO_P(both)
|
|
GET_GPIO_P(maska)
|
|
GET_GPIO_P(maskb)
|
|
|
|
|
|
#ifdef CONFIG_PM
|
|
/***********************************************************
|
|
*
|
|
* FUNCTIONS: Blackfin PM Setup API
|
|
*
|
|
* INPUTS/OUTPUTS:
|
|
* gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
|
|
* type -
|
|
* PM_WAKE_RISING
|
|
* PM_WAKE_FALLING
|
|
* PM_WAKE_HIGH
|
|
* PM_WAKE_LOW
|
|
* PM_WAKE_BOTH_EDGES
|
|
*
|
|
* DESCRIPTION: Blackfin PM Driver API
|
|
*
|
|
* CAUTION:
|
|
*************************************************************
|
|
* 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)
|
|
{
|
|
unsigned long flags;
|
|
|
|
if (check_gpio(gpio) < 0)
|
|
return;
|
|
|
|
local_irq_save(flags);
|
|
|
|
wakeup_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
|
|
|
|
local_irq_restore(flags);
|
|
}
|
|
EXPORT_SYMBOL(gpio_pm_wakeup_free);
|
|
|
|
static int bfin_gpio_wakeup_type(unsigned gpio, unsigned char type)
|
|
{
|
|
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);
|
|
|
|
SSYNC();
|
|
|
|
return 0;
|
|
}
|
|
|
|
u32 bfin_pm_setup(void)
|
|
{
|
|
u16 bank, mask, i, gpio;
|
|
|
|
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];
|
|
#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)];
|
|
}
|
|
}
|
|
|
|
AWA_DUMMY_READ(maskb_set);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void bfin_pm_restore(void)
|
|
{
|
|
u16 bank, mask, i;
|
|
|
|
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;
|
|
#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;
|
|
}
|
|
AWA_DUMMY_READ(maskb);
|
|
}
|
|
|
|
#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)));
|
|
}
|
|
EXPORT_SYMBOL(get_gpio_dir);
|
|
|
|
#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))) {
|
|
dump_stack();
|
|
printk(KERN_ERR
|
|
"%s: Peripheral %d is already reserved as GPIO by %s !\n",
|
|
__func__, ident, get_label(ident));
|
|
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;
|
|
|
|
dump_stack();
|
|
printk(KERN_ERR
|
|
"%s: Peripheral %d function %d is already reserved by %s !\n",
|
|
__func__, ident, P_FUNCT2MUX(per), get_label(ident));
|
|
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))) {
|
|
dump_stack();
|
|
printk(KERN_ERR
|
|
"%s: Peripheral %d is already reserved as GPIO by %s !\n",
|
|
__func__, ident, get_label(ident));
|
|
local_irq_restore(flags);
|
|
return -EBUSY;
|
|
}
|
|
|
|
}
|
|
|
|
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;
|
|
|
|
dump_stack();
|
|
printk(KERN_ERR
|
|
"%s: Peripheral %d function %d is already"
|
|
" reserved by %s !\n",
|
|
__func__, ident, P_FUNCT2MUX(per),
|
|
get_label(ident));
|
|
local_irq_restore(flags);
|
|
return -EBUSY;
|
|
}
|
|
|
|
}
|
|
|
|
anyway:
|
|
portmux_setup(per, P_FUNCT2MUX(per));
|
|
|
|
port_setup(ident, PERIPHERAL_USAGE);
|
|
|
|
reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident);
|
|
local_irq_restore(flags);
|
|
set_label(ident, label);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(peripheral_request);
|
|
#endif
|
|
|
|
int peripheral_request_list(const unsigned short per[], const char *label)
|
|
{
|
|
u16 cnt;
|
|
int ret;
|
|
|
|
for (cnt = 0; per[cnt] != 0; cnt++) {
|
|
|
|
ret = peripheral_request(per[cnt], label);
|
|
|
|
if (ret < 0) {
|
|
for ( ; cnt > 0; cnt--)
|
|
peripheral_free(per[cnt - 1]);
|
|
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(peripheral_request_list);
|
|
|
|
void peripheral_free(unsigned short per)
|
|
{
|
|
unsigned long flags;
|
|
unsigned short ident = P_IDENT(per);
|
|
|
|
if (per & P_DONTCARE)
|
|
return;
|
|
|
|
if (!(per & P_DEFINED))
|
|
return;
|
|
|
|
if (check_gpio(ident) < 0)
|
|
return;
|
|
|
|
local_irq_save(flags);
|
|
|
|
if (unlikely(!(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident)))) {
|
|
local_irq_restore(flags);
|
|
return;
|
|
}
|
|
|
|
if (!(per & P_MAYSHARE))
|
|
port_setup(ident, GPIO_USAGE);
|
|
|
|
reserved_peri_map[gpio_bank(ident)] &= ~gpio_bit(ident);
|
|
|
|
set_label(ident, "free");
|
|
|
|
local_irq_restore(flags);
|
|
}
|
|
EXPORT_SYMBOL(peripheral_free);
|
|
|
|
void peripheral_free_list(const unsigned short per[])
|
|
{
|
|
u16 cnt;
|
|
for (cnt = 0; per[cnt] != 0; cnt++)
|
|
peripheral_free(per[cnt]);
|
|
}
|
|
EXPORT_SYMBOL(peripheral_free_list);
|
|
|
|
/***********************************************************
|
|
*
|
|
* FUNCTIONS: Blackfin GPIO Driver
|
|
*
|
|
* INPUTS/OUTPUTS:
|
|
* gpio PIO Number between 0 and MAX_BLACKFIN_GPIOS
|
|
* label String
|
|
*
|
|
* DESCRIPTION: Blackfin GPIO Driver API
|
|
*
|
|
* CAUTION:
|
|
*************************************************************
|
|
* MODIFICATION HISTORY :
|
|
**************************************************************/
|
|
|
|
int gpio_request(unsigned gpio, const char *label)
|
|
{
|
|
unsigned long flags;
|
|
|
|
if (check_gpio(gpio) < 0)
|
|
return -EINVAL;
|
|
|
|
local_irq_save(flags);
|
|
|
|
/*
|
|
* Allow that the identical GPIO can
|
|
* be requested from the same driver twice
|
|
* Do nothing and return -
|
|
*/
|
|
|
|
if (cmp_label(gpio, label) == 0) {
|
|
local_irq_restore(flags);
|
|
return 0;
|
|
}
|
|
|
|
if (unlikely(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
|
|
dump_stack();
|
|
printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved by %s !\n",
|
|
gpio, get_label(gpio));
|
|
local_irq_restore(flags);
|
|
return -EBUSY;
|
|
}
|
|
if (unlikely(reserved_peri_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
|
|
dump_stack();
|
|
printk(KERN_ERR
|
|
"bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n",
|
|
gpio, get_label(gpio));
|
|
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;
|
|
}
|
|
EXPORT_SYMBOL(gpio_request);
|
|
|
|
void gpio_free(unsigned gpio)
|
|
{
|
|
unsigned long flags;
|
|
|
|
if (check_gpio(gpio) < 0)
|
|
return;
|
|
|
|
local_irq_save(flags);
|
|
|
|
if (unlikely(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)))) {
|
|
dump_stack();
|
|
gpio_error(gpio);
|
|
local_irq_restore(flags);
|
|
return;
|
|
}
|
|
|
|
reserved_gpio_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
|
|
|
|
set_label(gpio, "free");
|
|
|
|
local_irq_restore(flags);
|
|
}
|
|
EXPORT_SYMBOL(gpio_free);
|
|
|
|
|
|
#ifdef BF548_FAMILY
|
|
int gpio_direction_input(unsigned gpio)
|
|
{
|
|
unsigned long flags;
|
|
|
|
if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
|
|
gpio_error(gpio);
|
|
return -EINVAL;
|
|
}
|
|
|
|
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);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(gpio_direction_input);
|
|
|
|
int gpio_direction_output(unsigned gpio, int value)
|
|
{
|
|
unsigned long flags;
|
|
|
|
if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
|
|
gpio_error(gpio);
|
|
return -EINVAL;
|
|
}
|
|
|
|
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);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(gpio_direction_output);
|
|
|
|
void gpio_set_value(unsigned gpio, int 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);
|
|
|
|
int gpio_get_value(unsigned gpio)
|
|
{
|
|
return (1 & (gpio_array[gpio_bank(gpio)]->port_data >> gpio_sub_n(gpio)));
|
|
}
|
|
EXPORT_SYMBOL(gpio_get_value);
|
|
|
|
void bfin_gpio_irq_prepare(unsigned gpio)
|
|
{
|
|
unsigned long flags;
|
|
|
|
port_setup(gpio, GPIO_USAGE);
|
|
|
|
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);
|
|
}
|
|
|
|
#else
|
|
|
|
int gpio_get_value(unsigned gpio)
|
|
{
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
if (unlikely(get_gpio_edge(gpio))) {
|
|
local_irq_save(flags);
|
|
set_gpio_edge(gpio, 0);
|
|
ret = get_gpio_data(gpio);
|
|
set_gpio_edge(gpio, 1);
|
|
local_irq_restore(flags);
|
|
|
|
return ret;
|
|
} else
|
|
return get_gpio_data(gpio);
|
|
}
|
|
EXPORT_SYMBOL(gpio_get_value);
|
|
|
|
|
|
int gpio_direction_input(unsigned gpio)
|
|
{
|
|
unsigned long flags;
|
|
|
|
if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
|
|
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);
|
|
AWA_DUMMY_READ(inen);
|
|
local_irq_restore(flags);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(gpio_direction_input);
|
|
|
|
int gpio_direction_output(unsigned gpio, int value)
|
|
{
|
|
unsigned long flags;
|
|
|
|
if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
|
|
gpio_error(gpio);
|
|
return -EINVAL;
|
|
}
|
|
|
|
local_irq_save(flags);
|
|
gpio_bankb[gpio_bank(gpio)]->inen &= ~gpio_bit(gpio);
|
|
|
|
if (value)
|
|
gpio_bankb[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
|
|
else
|
|
gpio_bankb[gpio_bank(gpio)]->data_clear = gpio_bit(gpio);
|
|
|
|
gpio_bankb[gpio_bank(gpio)]->dir |= gpio_bit(gpio);
|
|
AWA_DUMMY_READ(dir);
|
|
local_irq_restore(flags);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(gpio_direction_output);
|
|
|
|
/* 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
|
|
* pull the signal logically high. To work around this (common) error in
|
|
* board design, we explicitly set the pin back to GPIO mode, force /CS
|
|
* high, and wait for the electrons to do their thing.
|
|
*
|
|
* This function only makes sense to be called from reset code, but it
|
|
* 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)
|
|
{
|
|
u16 gpio = P_IDENT(P_SPI0_SSEL1);
|
|
|
|
port_setup(gpio, GPIO_USAGE);
|
|
gpio_bankb[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
|
|
AWA_DUMMY_READ(data_set);
|
|
udelay(1);
|
|
}
|
|
|
|
void bfin_gpio_irq_prepare(unsigned gpio)
|
|
{
|
|
port_setup(gpio, GPIO_USAGE);
|
|
}
|
|
|
|
#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)
|
|
{
|
|
int c, outlen = 0;
|
|
|
|
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));
|
|
else
|
|
continue;
|
|
buf += len;
|
|
outlen += len;
|
|
}
|
|
return outlen;
|
|
}
|
|
|
|
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;
|
|
}
|
|
__initcall(gpio_register_proc);
|
|
#endif
|