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gpio: port to am335x

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* port libgpio to am335x.
 * increase NR_IRQ to 16 to avoid too many IRQs requested error.
 * move gpio binary to /sbin (that's where mount looks for drivers).
 * fix bug that re-enabled banks that were disabled due to bad revision.
 * fix padconf masks for dm37xx in gpio driver (should be 16-bit).
 * fix a few typos in README.txt and comments.

Change-Id: I32374415a97135174c5224f76374a870909fa90c
This commit is contained in:
Thomas Cort 2013-09-03 07:47:59 -04:00
parent 74bc88581c
commit 0a9eab0bb6
8 changed files with 303 additions and 109 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
distrib/sets/lists/minix/md.evbarm
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@ -13,6 +13,7 @@
./multiboot/mod10_vm minix-sys ./multiboot/mod10_vm minix-sys
./multiboot/mod11_pfs minix-sys ./multiboot/mod11_pfs minix-sys
./multiboot/mod12_init minix-sys ./multiboot/mod12_init minix-sys
./sbin/gpio minix-sys
./usr/bin/eepromread minix-sys ./usr/bin/eepromread minix-sys
./usr/include/arm minix-sys ./usr/include/arm minix-sys
./usr/include/arm/aeabi.h minix-sys ./usr/include/arm/aeabi.h minix-sys
@ -108,7 +109,6 @@
./usr/sbin/bmp085 minix-sys ./usr/sbin/bmp085 minix-sys
./usr/sbin/cat24c256 minix-sys ./usr/sbin/cat24c256 minix-sys
./usr/sbin/fb minix-sys ./usr/sbin/fb minix-sys
./usr/sbin/gpio minix-sys
./usr/sbin/i2c minix-sys ./usr/sbin/i2c minix-sys
./usr/sbin/lan8710a minix-sys ./usr/sbin/lan8710a minix-sys
./usr/sbin/random minix-sys ./usr/sbin/random minix-sys

4
drivers/gpio/Makefile
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@ -2,7 +2,7 @@
PROG= gpio PROG= gpio
SRCS= gpio.c SRCS= gpio.c
DPADD+= ${LIBBLOCKDRIVER} ${LIBSYS} DPADD+= ${LIBBLOCKDRIVER} ${LIBSYS} ${LIBGPIO} ${LIBCLKCONF}
LDADD+= -lvtreefs -lsys -lgpio -lclkconf LDADD+= -lvtreefs -lsys -lgpio -lclkconf
# #
@ -11,6 +11,6 @@ CPPFLAGS+= -D_SYSTEM=1
MAN= MAN=
BINDIR?= /usr/sbin BINDIR?= /sbin
.include <minix.service.mk> .include <minix.service.mk>

28
drivers/gpio/README.txt
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@ -1,35 +1,35 @@
General Purpose Input and Output General Purpose Input and Output
To make MINIX more usable on embedded hardware we need some way to access the To make MINIX more usable on embedded hardware, we need some way to access the
GPIO features of the system on chip’s. Generally System on Chips (SoC) designs GPIO features of the system on a chip. Generally System on Chips (SoC) designs
provide some way configure pads to perform basic Input/Output configuration on provide some way to configure pads to perform basic Input/Output operations on
selected ports. These ports are also usually grouped into a bank. The end selected ports. These ports are also usually grouped into banks. The end
result is that you have a functional general input output block where you need result is that you have a functional general input output block where you need
to configure some the following functions. to configure some the following functions.
Functional requirements Functional Requirements
We envision that the short term usage of the GPIO library will be booth input We envision that the short term usage of the GPIO library will be both input
and output handling. Input handling as we want to be able to listen to button and output handling. Input handling as we want to be able to listen to button
presses and genrate key events and output handling because we want to be able presses and generate key events, and output handling because we want to be able
to control leds. to control LEDs.
GPIO required functionality GPIO required functionality
-Configure pins as input or output. -Configure pins as input or output.
-Configure the impedance of the pins. -Configure the impedance of the pins.
-Get or set the values of the pins(possibly in a single call). -Get or set the values of the pins (possibly in a single call).
-Configure interrupt levels for input pins. -Configure interrupt levels for input pins.
-Configure debouncing of pins.
Configure debouncing of pins. Additional kernel requirements:
Additional kernel requirements
-Manage the GPIO resources (who may access what) -Manage the GPIO resources (who may access what)
-Access the GPIO pins from within driver (for the keyboard) -Access the GPIO pins from within driver (for the keyboard)
-Access the GPIO pins from within userland (for toggeling leds) -Access the GPIO pins from within userland (for toggling LEDs)
Usage: Usage:
You have to manualy mount the gpio fs using the following command You have to manually mount the gpio fs using the following command
# mkdir -p /gpio
# mount -t gpio none /gpio # mount -t gpio none /gpio

27
drivers/gpio/gpio.c
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@ -165,15 +165,34 @@ init_hook(void)
log_warn(&log, "Failed to init gpio driver\n"); log_warn(&log, "Failed to init gpio driver\n");
} }
#ifdef AM335X
/* Export GPIO3_19 (P9-27 on BBB) output as LCD_EN */
sys_padconf(CONTROL_CONF_MCASP0_FSR, 0xffffffff,
(CONTROL_CONF_PUTYPESEL | CONTROL_CONF_MUXMODE(7)));
add_gpio_inode("LCD_EN", (32 * 3) + 19, GPIO_MODE_OUTPUT);
/* Export GPIO1_17 (P9-23 on BBB) input as RIGHT */
/* assumes external pull-up resistor (10K) */
sys_padconf(CONTROL_CONF_SPI0_D0, 0xffffffff, (CONTROL_CONF_RXACTIVE |
CONTROL_CONF_PUDEN | CONTROL_CONF_MUXMODE(7)));
add_gpio_inode("RIGHT", (32 * 1) + 17, GPIO_MODE_INPUT);
#elif DM37XX
add_gpio_inode("USR0", 149, GPIO_MODE_OUTPUT); add_gpio_inode("USR0", 149, GPIO_MODE_OUTPUT);
add_gpio_inode("USR1", 150, GPIO_MODE_OUTPUT); add_gpio_inode("USR1", 150, GPIO_MODE_OUTPUT);
add_gpio_inode("Button", 4, GPIO_MODE_INPUT); add_gpio_inode("Button", 4, GPIO_MODE_INPUT);
/* configure GPIO_144 to be exported */ /* configure GPIO_144 to be exported */
sys_padconf(CONTROL_PADCONF_UART2_CTS, 0xff, sys_padconf(CONTROL_PADCONF_UART2_CTS, 0x0000ffff,
PADCONF_MUXMODE(4) | PADCONF_PULL_MODE_PD_EN | PADCONF_MUXMODE(4) | PADCONF_PULL_MODE_PD_EN |
PADCONF_INPUT_ENABLE(1)); PADCONF_INPUT_ENABLE(1));
sys_padconf(CONTROL_PADCONF_MMC2_DAT6, 0xff00, sys_padconf(CONTROL_PADCONF_MMC2_DAT6, 0xffff0000,
(PADCONF_MUXMODE(4) | PADCONF_PULL_MODE_PD_EN | (PADCONF_MUXMODE(4) | PADCONF_PULL_MODE_PD_EN |
PADCONF_INPUT_ENABLE(1)) << 16); PADCONF_INPUT_ENABLE(1)) << 16);
@ -181,6 +200,8 @@ init_hook(void)
add_gpio_inode("BigRedButton", 144, GPIO_MODE_INPUT); add_gpio_inode("BigRedButton", 144, GPIO_MODE_INPUT);
add_gpio_inode("BigRedButtonLed", 139, GPIO_MODE_OUTPUT); add_gpio_inode("BigRedButtonLed", 139, GPIO_MODE_OUTPUT);
#endif /* DM37XX */
} }
static int static int
@ -197,7 +218,7 @@ static int
if (gpio_cbdata->type == GPIO_CB_ON if (gpio_cbdata->type == GPIO_CB_ON
|| gpio_cbdata->type == GPIO_CB_OFF) { || gpio_cbdata->type == GPIO_CB_OFF) {
/* turn on or of */ /* turn on or off */
if (gpio_set(gpio_cbdata->gpio, if (gpio_set(gpio_cbdata->gpio,
(gpio_cbdata->type == GPIO_CB_ON) ? 1 : 0)) { (gpio_cbdata->type == GPIO_CB_ON) ? 1 : 0)) {
*len = 0; *len = 0;

18
etc/system.conf
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@ -585,12 +585,18 @@ service gpio
PADCONF # 57 PADCONF # 57
; ;
irq irq
29 # GPIO module 1 29 # GPIO module 1 (dm37xx)
30 # GPIO module 2 30 # GPIO module 2 (dm37xx)
31 # GPIO module 3 31 # GPIO module 3 (dm37xx)
32 # GPIO module 4 32 # GPIO module 4 (dm37xx) / module 2a (am335x)
33 # GPIO module 5 33 # GPIO module 5 (dm37xx) / module 2b (am335x)
34 # GPIO module 6 34 # GPIO module 6 (dm37xx)
62 # GPIO module 3a (am335x)
63 # GPIO module 3b (am335x)
96 # GPIO module 0a (am335x)
97 # GPIO module 0b (am335x)
98 # GPIO module 1a (am335x)
99 # GPIO module 1b (am335x)
; ;
}; };

2
include/minix/config.h
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@ -63,7 +63,7 @@
#define NR_MEM_RANGE 20 #define NR_MEM_RANGE 20
/* Max. number of IRQs that can be assigned to a process */ /* Max. number of IRQs that can be assigned to a process */
#define NR_IRQ 8 #define NR_IRQ 16
/* Scheduling priorities. Values must start at zero (highest /* Scheduling priorities. Values must start at zero (highest
* priority) and increment. * priority) and increment.

243
lib/libgpio/gpio_omap.c
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@ -5,6 +5,7 @@
#include <minix/mmio.h> #include <minix/mmio.h>
#include <minix/gpio.h> #include <minix/gpio.h>
#include <minix/clkconf.h> #include <minix/clkconf.h>
#include <minix/type.h>
/* system headers */ /* system headers */
#include <sys/mman.h> #include <sys/mman.h>
@ -19,6 +20,7 @@
#include <assert.h> #include <assert.h>
/* local headers */ /* local headers */
#include "gpio_omap.h"
/* used for logging */ /* used for logging */
static struct log log = { static struct log log = {
@ -57,107 +59,171 @@ struct omap_gpio_bank
uint32_t irq_nr; /* irq number */ uint32_t irq_nr; /* irq number */
uint32_t base_address; uint32_t base_address;
int32_t disabled; int32_t disabled;
int irq_id; /* orignhal hook id??? */ int irq_id; /* original hook id??? */
int irq_hook_id; /* hook id */ int irq_hook_id; /* hook id */
uint32_t inter_values; /* values when the interrupt was called */ uint32_t inter_values; /* values when the interrupt was called */
}; };
#define GPIO1_BASE (0x48310000)
#define GPIO2_BASE (0x49050000)
#define GPIO3_BASE (0x49052000)
#define GPIO4_BASE (0x49054000)
#define GPIO5_BASE (0x49056000)
#define GPIO6_BASE (0x49058000)
#define GPIO1_IRQ 29 /* GPIO module 1 */
#define GPIO2_IRQ 30 /* GPIO module 2 */
#define GPIO3_IRQ 31 /* GPIO module 3 */
#define GPIO4_IRQ 32 /* GPIO module 4 */
#define GPIO5_IRQ 33 /* GPIO module 5 */
#define GPIO6_IRQ 34 /* GPIO module 6 */
#define GPIO1_IRQ_HOOK_ID 0
#define GPIO2_IRQ_HOOK_ID 1
#define GPIO3_IRQ_HOOK_ID 2
#define GPIO4_IRQ_HOOK_ID 3
#define GPIO5_IRQ_HOOK_ID 4
#define GPIO6_IRQ_HOOK_ID 5
#define GPIO_IRQSTATUS1 (0x18)
#define GPIO_IRQENABLE1 (0x01C)
#define GPIO_DATAOUT (0x3c)
#define GPIO_DATAIN (0x38)
#define GPIO_OE (0x34) /* Output Data Enable */
#define GPIO_RISINGDETECT1 (0x048)
#define GPIO_FALLINGDETECT1 (0x04c)
#define GPIO_CLEARDATAOUT (0x90)
#define GPIO_SETDATAOUT (0x94)
static struct omap_gpio_bank omap_gpio_banks[] = { static struct omap_gpio_bank omap_gpio_banks[] = {
#ifdef AM335X
{ {
.name = "GPIO1", .name = "GPIO0",
.register_address = GPIO1_BASE, .register_address = AM335X_GPIO0_BASE,
.irq_nr = GPIO1_IRQ, .irq_nr = AM335X_GPIO0A_IRQ,
.base_address = 0, .base_address = 0,
.disabled = 0, .disabled = 0,
.irq_id = GPIO1_IRQ_HOOK_ID, .irq_id = AM335X_GPIO0A_IRQ_HOOK_ID,
.irq_hook_id = GPIO1_IRQ_HOOK_ID, .irq_hook_id = AM335X_GPIO0A_IRQ_HOOK_ID,
},
{
.name = "GPIO1",
.register_address = AM335X_GPIO1_BASE,
.irq_nr = AM335X_GPIO1A_IRQ,
.base_address = 0,
.disabled = 0,
.irq_id = AM335X_GPIO1A_IRQ_HOOK_ID,
.irq_hook_id = AM335X_GPIO1A_IRQ_HOOK_ID,
}, },
{ {
.name = "GPIO2", .name = "GPIO2",
.register_address = GPIO2_BASE, .register_address = AM335X_GPIO2_BASE,
.irq_nr = GPIO2_IRQ, .irq_nr = AM335X_GPIO2A_IRQ,
.base_address = 0, .base_address = 0,
.disabled = 0, .disabled = 0,
.irq_id = GPIO2_IRQ_HOOK_ID, .irq_id = AM335X_GPIO2A_IRQ_HOOK_ID,
.irq_hook_id = GPIO2_IRQ_HOOK_ID, .irq_hook_id = AM335X_GPIO2A_IRQ_HOOK_ID,
}, },
{ {
.name = "GPIO3", .name = "GPIO3",
.register_address = GPIO3_BASE, .register_address = AM335X_GPIO3_BASE,
.irq_nr = GPIO3_IRQ, .irq_nr = AM335X_GPIO3A_IRQ,
.base_address = 0, .base_address = 0,
.disabled = 0, .disabled = 0,
.irq_id = GPIO3_IRQ_HOOK_ID, .irq_id = AM335X_GPIO3A_IRQ_HOOK_ID,
.irq_hook_id = GPIO3_IRQ_HOOK_ID, .irq_hook_id = AM335X_GPIO3A_IRQ_HOOK_ID,
},
#elif DM37XX
{
.name = "GPIO1",
.register_address = DM37XX_GPIO1_BASE,
.irq_nr = DM37XX_GPIO1_IRQ,
.base_address = 0,
.disabled = 0,
.irq_id = DM37XX_GPIO1_IRQ_HOOK_ID,
.irq_hook_id = DM37XX_GPIO1_IRQ_HOOK_ID,
},
{
.name = "GPIO2",
.register_address = DM37XX_GPIO2_BASE,
.irq_nr = DM37XX_GPIO2_IRQ,
.base_address = 0,
.disabled = 0,
.irq_id = DM37XX_GPIO2_IRQ_HOOK_ID,
.irq_hook_id = DM37XX_GPIO2_IRQ_HOOK_ID,
},
{
.name = "GPIO3",
.register_address = DM37XX_GPIO3_BASE,
.irq_nr = DM37XX_GPIO3_IRQ,
.base_address = 0,
.disabled = 0,
.irq_id = DM37XX_GPIO3_IRQ_HOOK_ID,
.irq_hook_id = DM37XX_GPIO3_IRQ_HOOK_ID,
}, },
{ {
.name = "GPIO4", .name = "GPIO4",
.register_address = GPIO4_BASE, .register_address = DM37XX_GPIO4_BASE,
.irq_nr = GPIO4_IRQ, .irq_nr = DM37XX_GPIO4_IRQ,
.base_address = 0, .base_address = 0,
.disabled = 0, .disabled = 0,
.irq_id = GPIO4_IRQ_HOOK_ID, .irq_id = DM37XX_GPIO4_IRQ_HOOK_ID,
.irq_hook_id = GPIO4_IRQ_HOOK_ID, .irq_hook_id = DM37XX_GPIO4_IRQ_HOOK_ID,
}, },
{ {
.name = "GPIO5", .name = "GPIO5",
.register_address = GPIO5_BASE, .register_address = DM37XX_GPIO5_BASE,
.irq_nr = GPIO5_IRQ, .irq_nr = DM37XX_GPIO5_IRQ,
.base_address = 0, .base_address = 0,
.disabled = 0, .disabled = 0,
.irq_id = GPIO5_IRQ_HOOK_ID, .irq_id = DM37XX_GPIO5_IRQ_HOOK_ID,
.irq_hook_id = GPIO5_IRQ_HOOK_ID, .irq_hook_id = DM37XX_GPIO5_IRQ_HOOK_ID,
}, },
{ {
.name = "GPIO6", .name = "GPIO6",
.register_address = GPIO6_BASE, .register_address = DM37XX_GPIO6_BASE,
.irq_nr = GPIO6_IRQ, .irq_nr = DM37XX_GPIO6_IRQ,
.base_address = 0, .base_address = 0,
.disabled = 0, .disabled = 0,
.irq_id = GPIO6_IRQ_HOOK_ID, .irq_id = DM37XX_GPIO6_IRQ_HOOK_ID,
.irq_hook_id = GPIO6_IRQ_HOOK_ID, .irq_hook_id = DM37XX_GPIO6_IRQ_HOOK_ID,
}, },
#endif /* DM37XX */
{NULL, 0, 0, 0, 0, 0, 0, 0 } {NULL, 0, 0, 0, 0, 0, 0, 0 }
}; };
#define GPIO_REVISION 0x00 #define NBANKS ((int)((sizeof(omap_gpio_banks)/sizeof(omap_gpio_banks[0])) - 1))
#define GPIO_REVISION_MAJOR(X) ((X & 0xF0) >> 4)
#define GPIO_REVISION_MINOR(X) (X & 0XF) /*
* Defines the set of registers. There is a lot of commonality between the
* AM335X and DM37XX gpio registers. To avoid ifdefs everywhere, we define
* a central register set and only use ifdefs where they differ.
*/
typedef struct gpio_omap_registers {
vir_bytes REVISION;
vir_bytes IRQENABLE;
vir_bytes IRQSTATUS;
vir_bytes DATAOUT;
vir_bytes DATAIN;
vir_bytes OE;
vir_bytes RISINGDETECT;
vir_bytes FALLINGDETECT;
vir_bytes CLEARDATAOUT;
vir_bytes SETDATAOUT;
} gpio_omap_regs_t;
/* Define the registers for each chip */
gpio_omap_regs_t gpio_omap_dm37xx = {
.REVISION = DM37XX_GPIO_REVISION,
.IRQENABLE = DM37XX_GPIO_IRQENABLE1,
.IRQSTATUS = DM37XX_GPIO_IRQSTATUS1,
.DATAOUT = DM37XX_GPIO_DATAOUT,
.DATAIN = DM37XX_GPIO_DATAIN,
.OE = DM37XX_GPIO_OE,
.RISINGDETECT = DM37XX_GPIO_RISINGDETECT1,
.FALLINGDETECT = DM37XX_GPIO_FALLINGDETECT1,
.CLEARDATAOUT = DM37XX_GPIO_CLEARDATAOUT,
.SETDATAOUT = DM37XX_GPIO_SETDATAOUT
};
gpio_omap_regs_t gpio_omap_am335x = {
.REVISION = AM335X_GPIO_REVISION,
.IRQENABLE = AM335X_GPIO_IRQSTATUS_SET_0,
.IRQSTATUS = AM335X_GPIO_IRQSTATUS_0,
.DATAOUT = AM335X_GPIO_DATAOUT,
.DATAIN = AM335X_GPIO_DATAIN,
.OE = AM335X_GPIO_OE,
.RISINGDETECT = AM335X_GPIO_RISINGDETECT,
.FALLINGDETECT = AM335X_GPIO_FALLINGDETECT,
.CLEARDATAOUT = AM335X_GPIO_CLEARDATAOUT,
.SETDATAOUT = AM335X_GPIO_SETDATAOUT
};
#ifdef AM335X
static gpio_omap_regs_t *regs = &gpio_omap_am335x;
#elif DM37XX
static gpio_omap_regs_t *regs = &gpio_omap_dm37xx;
#endif /* DM37XX */
static struct omap_gpio_bank * static struct omap_gpio_bank *
omap_gpio_bank_get(int gpio_nr) omap_gpio_bank_get(int gpio_nr)
{ {
struct omap_gpio_bank *bank; struct omap_gpio_bank *bank;
assert(gpio_nr >= 0 && gpio_nr <= 32 * 6); assert(gpio_nr >= 0 && gpio_nr <= 32 * NBANKS);
bank = &omap_gpio_banks[gpio_nr / 32]; bank = &omap_gpio_banks[gpio_nr / 32];
return bank; return bank;
} }
@ -167,7 +233,7 @@ omap_gpio_claim(char *owner, int nr, struct gpio **gpio)
{ {
log_trace(&log, "%s s claiming %d\n", owner, nr); log_trace(&log, "%s s claiming %d\n", owner, nr);
if (nr < 0 && nr >= 32 * 6) { if (nr < 0 && nr >= 32 * NBANKS) {
log_warn(&log, "%s is claiming unknown GPIO number %d\n", log_warn(&log, "%s is claiming unknown GPIO number %d\n",
owner, nr); owner, nr);
return EINVAL; return EINVAL;
@ -197,17 +263,17 @@ omap_gpio_pin_mode(struct gpio *gpio, int mode)
bank = omap_gpio_bank_get(gpio->nr); bank = omap_gpio_bank_get(gpio->nr);
log_debug(&log, log_debug(&log,
"pin mode bank %s, base address 0x%x -> register address (0x%x,0x%x,0x%x)\n", "pin mode bank %s, base address 0x%x -> register address (0x%x,0x%x,0x%x)\n",
bank->name, bank->base_address, bank->register_address, GPIO_OE, bank->name, bank->base_address, bank->register_address, regs->OE,
bank->register_address + GPIO_OE); bank->register_address + regs->OE);
if (mode == GPIO_MODE_OUTPUT) { if (mode == GPIO_MODE_OUTPUT) {
set32(bank->base_address + GPIO_OE, BIT(gpio->nr % 32), 0); set32(bank->base_address + regs->OE, BIT(gpio->nr % 32), 0);
} else { } else {
set32(bank->base_address + GPIO_FALLINGDETECT1, set32(bank->base_address + regs->FALLINGDETECT,
BIT(gpio->nr % 32), 0xffffffff); BIT(gpio->nr % 32), 0xffffffff);
set32(bank->base_address + GPIO_IRQENABLE1, BIT(gpio->nr % 32), set32(bank->base_address + regs->IRQENABLE, BIT(gpio->nr % 32),
0xffffffff); 0xffffffff);
set32(bank->base_address + GPIO_OE, BIT(gpio->nr % 32), set32(bank->base_address + regs->OE, BIT(gpio->nr % 32),
0xffffffff); 0xffffffff);
} }
return 0; return 0;
@ -218,14 +284,14 @@ omap_gpio_set(struct gpio *gpio, int value)
{ {
struct omap_gpio_bank *bank; struct omap_gpio_bank *bank;
assert(gpio != NULL); assert(gpio != NULL);
assert(gpio->nr >= 0 && gpio->nr <= 32 * 6); assert(gpio->nr >= 0 && gpio->nr <= 32 * NBANKS);
bank = omap_gpio_bank_get(gpio->nr); bank = omap_gpio_bank_get(gpio->nr);
if (value == 1) { if (value == 1) {
write32(bank->base_address + GPIO_SETDATAOUT, write32(bank->base_address + regs->SETDATAOUT,
BIT(gpio->nr % 32)); BIT(gpio->nr % 32));
} else { } else {
write32(bank->base_address + GPIO_CLEARDATAOUT, write32(bank->base_address + regs->CLEARDATAOUT,
BIT(gpio->nr % 32)); BIT(gpio->nr % 32));
} }
return OK; return OK;
@ -236,21 +302,21 @@ omap_gpio_read(struct gpio *gpio, int *value)
{ {
struct omap_gpio_bank *bank; struct omap_gpio_bank *bank;
assert(gpio != NULL); assert(gpio != NULL);
assert(gpio->nr >= 0 && gpio->nr <= 32 * 6); assert(gpio->nr >= 0 && gpio->nr <= 32 * NBANKS);
bank = omap_gpio_bank_get(gpio->nr); bank = omap_gpio_bank_get(gpio->nr);
log_trace(&log, "mode=%d OU/IN 0x%08x 0x%08x\n", gpio->mode, log_trace(&log, "mode=%d OU/IN 0x%08x 0x%08x\n", gpio->mode,
read32(bank->base_address + GPIO_DATAIN), read32(bank->base_address + regs->DATAIN),
read32(bank->base_address + GPIO_DATAOUT)); read32(bank->base_address + regs->DATAOUT));
if (gpio->mode == GPIO_MODE_INPUT) { if (gpio->mode == GPIO_MODE_INPUT) {
*value = *value =
(read32(bank->base_address + (read32(bank->base_address +
GPIO_DATAIN) >> (gpio->nr % 32)) & 0x1; regs->DATAIN) >> (gpio->nr % 32)) & 0x1;
} else { } else {
*value = *value =
(read32(bank->base_address + (read32(bank->base_address +
GPIO_DATAOUT) >> (gpio->nr % 32)) & 0x1; regs->DATAOUT) >> (gpio->nr % 32)) & 0x1;
} }
return OK; return OK;
@ -261,7 +327,7 @@ omap_gpio_intr_read(struct gpio *gpio, int *value)
{ {
struct omap_gpio_bank *bank; struct omap_gpio_bank *bank;
assert(gpio != NULL); assert(gpio != NULL);
assert(gpio->nr >= 0 && gpio->nr <= 32 * 6); assert(gpio->nr >= 0 && gpio->nr <= 32 * NBANKS);
bank = omap_gpio_bank_get(gpio->nr); bank = omap_gpio_bank_get(gpio->nr);
/* TODO: check if interrupt where enabled?? */ /* TODO: check if interrupt where enabled?? */
@ -293,9 +359,9 @@ omap_message_hook(message * m)
bank->name); bank->name);
bank->inter_values |= bank->inter_values |=
read32(bank->base_address + read32(bank->base_address +
GPIO_IRQSTATUS1); regs->IRQSTATUS);
/* clear the interrupts */ /* clear the interrupts */
write32(bank->base_address + GPIO_IRQSTATUS1, write32(bank->base_address + regs->IRQSTATUS,
0xffffffff); 0xffffffff);
if (sys_irqenable(&bank->irq_hook_id) != OK) { if (sys_irqenable(&bank->irq_hook_id) != OK) {
log_warn(&log, log_warn(&log,
@ -306,7 +372,7 @@ omap_message_hook(message * m)
} }
return OK; return OK;
default: default:
log_warn(&log, "Unknown message\n"); log_debug(&log, "Unknown message\n");
break; break;
} }
return OK; return OK;
@ -343,16 +409,25 @@ omap_gpio_init(struct gpio_driver *gpdrv)
} }
revision = 0; revision = 0;
revision = read32(bank->base_address + GPIO_REVISION); revision = read32(bank->base_address + regs->REVISION);
/* test if we can access it */ /* test if we can access it */
if (GPIO_REVISION_MAJOR(revision) != 2 if (
|| GPIO_REVISION_MINOR(revision) != 5) { #ifdef AM335X
AM335X_GPIO_REVISION_MAJOR(revision) != 0
|| AM335X_GPIO_REVISION_MINOR(revision) != 1
#elif DM37XX
DM37XX_GPIO_REVISION_MAJOR(revision) != 2
|| DM37XX_GPIO_REVISION_MINOR(revision) != 5
#endif /* DM37XX */
) {
log_warn(&log, log_warn(&log,
"Failed to read the revision of GPIO bank %s.. disabling\n", "Failed to read the revision of GPIO bank %s.. disabling\n",
bank->name); bank->name);
log_warn(&log, "Got 0x%x\n", revision);
bank->disabled = 1; bank->disabled = 1;
} else {
bank->disabled = 0;
} }
bank->disabled = 0;
if (sys_irqsetpolicy(bank->irq_nr, 0, if (sys_irqsetpolicy(bank->irq_nr, 0,
&bank->irq_hook_id) != OK) { &bank->irq_hook_id) != OK) {
@ -376,9 +451,13 @@ omap_gpio_init(struct gpio_driver *gpdrv)
}; };
clkconf_init(); clkconf_init();
#ifdef AM335X
/* Nothing to enable for GPIO on AM335X */
#elif DM37XX
/* enable the interface and functional clock on GPIO bank 1 */ /* enable the interface and functional clock on GPIO bank 1 */
clkconf_set(CM_FCLKEN_WKUP, BIT(3), 0xffffffff); clkconf_set(CM_FCLKEN_WKUP, BIT(3), 0xffffffff);
clkconf_set(CM_ICLKEN_WKUP, BIT(3), 0xffffffff); clkconf_set(CM_ICLKEN_WKUP, BIT(3), 0xffffffff);
#endif /* DM37XX */
clkconf_release(); clkconf_release();

88
lib/libgpio/gpio_omap.h Normal file
View File

@ -0,0 +1,88 @@
#ifndef __GPIO_OMAP_H
#define __GPIO_OMAP_H
#define AM335X_GPIO0_BASE (0x44e07000)
#define AM335X_GPIO1_BASE (0x4804c000)
#define AM335X_GPIO2_BASE (0x481ac000)
#define AM335X_GPIO3_BASE (0x481ae000)
#define AM335X_GPIO0A_IRQ 96
#define AM335X_GPIO0B_IRQ 97
#define AM335X_GPIO1A_IRQ 98
#define AM335X_GPIO1B_IRQ 99
#define AM335X_GPIO2A_IRQ 32
#define AM335X_GPIO2B_IRQ 33
#define AM335X_GPIO3A_IRQ 62
#define AM335X_GPIO3B_IRQ 63
#define AM335X_GPIO0A_IRQ_HOOK_ID 0
#define AM335X_GPIO0B_IRQ_HOOK_ID 1
#define AM335X_GPIO1A_IRQ_HOOK_ID 2
#define AM335X_GPIO1B_IRQ_HOOK_ID 3
#define AM335X_GPIO2A_IRQ_HOOK_ID 4
#define AM335X_GPIO2B_IRQ_HOOK_ID 5
#define AM335X_GPIO3A_IRQ_HOOK_ID 6
#define AM335X_GPIO3B_IRQ_HOOK_ID 7
#define AM335X_GPIO_REVISION 0x000
#define AM335X_GPIO_SYSCONFIG 0x010
#define AM335X_GPIO_EOI 0x020
#define AM335X_GPIO_IRQSTATUS_RAW_0 0x024
#define AM335X_GPIO_IRQSTATUS_RAW_1 0x028
#define AM335X_GPIO_IRQSTATUS_0 0x02C
#define AM335X_GPIO_IRQSTATUS_1 0x030
#define AM335X_GPIO_IRQSTATUS_SET_0 0x034
#define AM335X_GPIO_IRQSTATUS_SET_1 0x038
#define AM335X_GPIO_IRQSTATUS_CLR_0 0x03C
#define AM335X_GPIO_IRQSTATUS_CLR_1 0x040
#define AM335X_GPIO_IRQWAKEN_0 0x044
#define AM335X_GPIO_IRQWAKEN_1 0x048
#define AM335X_GPIO_SYSSTATUS 0x114
#define AM335X_GPIO_CTRL 0x130
#define AM335X_GPIO_OE 0x134
#define AM335X_GPIO_DATAIN 0x138
#define AM335X_GPIO_DATAOUT 0x13C
#define AM335X_GPIO_LEVELDETECT0 0x140
#define AM335X_GPIO_LEVELDETECT1 0x144
#define AM335X_GPIO_RISINGDETECT 0x148
#define AM335X_GPIO_FALLINGDETECT 0x14C
#define AM335X_GPIO_DEBOUNCENABLE 0x150
#define AM335X_GPIO_DEBOUNCINGTIME 0x154
#define AM335X_GPIO_CLEARDATAOUT 0x190
#define AM335X_GPIO_SETDATAOUT 0x194
#define AM335X_GPIO_REVISION_MAJOR(X) ((X >> 8) & 0x07)
#define AM335X_GPIO_REVISION_MINOR(X) (X & 0x3f)
#define DM37XX_GPIO1_BASE (0x48310000)
#define DM37XX_GPIO2_BASE (0x49050000)
#define DM37XX_GPIO3_BASE (0x49052000)
#define DM37XX_GPIO4_BASE (0x49054000)
#define DM37XX_GPIO5_BASE (0x49056000)
#define DM37XX_GPIO6_BASE (0x49058000)
#define DM37XX_GPIO1_IRQ 29 /* GPIO module 1 */
#define DM37XX_GPIO2_IRQ 30 /* GPIO module 2 */
#define DM37XX_GPIO3_IRQ 31 /* GPIO module 3 */
#define DM37XX_GPIO4_IRQ 32 /* GPIO module 4 */
#define DM37XX_GPIO5_IRQ 33 /* GPIO module 5 */
#define DM37XX_GPIO6_IRQ 34 /* GPIO module 6 */
#define DM37XX_GPIO1_IRQ_HOOK_ID 0
#define DM37XX_GPIO2_IRQ_HOOK_ID 1
#define DM37XX_GPIO3_IRQ_HOOK_ID 2
#define DM37XX_GPIO4_IRQ_HOOK_ID 3
#define DM37XX_GPIO5_IRQ_HOOK_ID 4
#define DM37XX_GPIO6_IRQ_HOOK_ID 5
#define DM37XX_GPIO_IRQSTATUS1 (0x18)
#define DM37XX_GPIO_IRQENABLE1 (0x01C)
#define DM37XX_GPIO_DATAOUT (0x3c)
#define DM37XX_GPIO_DATAIN (0x38)
#define DM37XX_GPIO_OE (0x34) /* Output Data Enable */
#define DM37XX_GPIO_RISINGDETECT1 (0x048)
#define DM37XX_GPIO_FALLINGDETECT1 (0x04c)
#define DM37XX_GPIO_CLEARDATAOUT (0x90)
#define DM37XX_GPIO_SETDATAOUT (0x94)
#define DM37XX_GPIO_REVISION 0x00
#define DM37XX_GPIO_REVISION_MAJOR(X) ((X & 0xF0) >> 4)
#define DM37XX_GPIO_REVISION_MINOR(X) (X & 0XF)
#endif /* __GPIO_OMAP_H */