* [PATCH 2/3] at91_udc: Add vbus polarity and polling mode
2010-06-16 21:20 [PATCH 0/3] at91: Add support for Snapper 9260/9G20 modules Ryan Mallon
2010-06-16 21:20 ` [PATCH 1/3] AT91: Define NR_BUILTIN_GPIO Ryan Mallon
@ 2010-06-16 21:20 ` Ryan Mallon
2010-06-17 22:03 ` Ryan Mallon
2010-06-16 21:20 ` [PATCH 3/3] at91: Add support for Bluewater Systems Snapper 9260/9G20 modules Ryan Mallon
2 siblings, 1 reply; 5+ messages in thread
From: Ryan Mallon @ 2010-06-16 21:20 UTC (permalink / raw)
To: linux-arm-kernel
Allow the vbus signal to optionally use polling. This is required if
the vbus signal is connected to an non-interrupting io expander for
example. Also add an option to have vbus be an active low signal. Both
options are set in the platform data for the device.
Signed-off-by: Ryan Mallon <ryan@bluewatersys.com>
---
arch/arm/mach-at91/include/mach/board.h | 2 +
drivers/usb/gadget/at91_udc.c | 45 ++++++++++++++++++++++++-------
drivers/usb/gadget/at91_udc.h | 1 +
3 files changed, 38 insertions(+), 10 deletions(-)
diff --git a/arch/arm/mach-at91/include/mach/board.h b/arch/arm/mach-at91/include/mach/board.h
index df2ed84..58528aa 100644
--- a/arch/arm/mach-at91/include/mach/board.h
+++ b/arch/arm/mach-at91/include/mach/board.h
@@ -44,6 +44,8 @@
/* USB Device */
struct at91_udc_data {
u8 vbus_pin; /* high == host powering us */
+ u8 vbus_active_low; /* vbus polarity */
+ u8 vbus_polled; /* Use polling, not interrupt */
u8 pullup_pin; /* active == D+ pulled up */
u8 pullup_active_low; /* true == pullup_pin is active low */
};
diff --git a/drivers/usb/gadget/at91_udc.c b/drivers/usb/gadget/at91_udc.c
index eaa79c8..9649d76 100644
--- a/drivers/usb/gadget/at91_udc.c
+++ b/drivers/usb/gadget/at91_udc.c
@@ -76,6 +76,7 @@
static const char driver_name [] = "at91_udc";
static const char ep0name[] = "ep0";
+#define VBUS_POLL_TIMEOUT msecs_to_jiffies(1000)
#define at91_udp_read(dev, reg) \
__raw_readl((dev)->udp_baseaddr + (reg))
@@ -1556,20 +1557,37 @@ static struct at91_udc controller = {
/* ep6 and ep7 are also reserved (custom silicon might use them) */
};
+static void at91_vbus_update(struct at91_udc *udc)
+{
+ unsigned value;
+
+ value = gpio_get_value(udc->board.vbus_pin);
+ if (udc->board.vbus_active_low)
+ value ^= 1;
+ if (value != udc->vbus)
+ at91_vbus_session(&udc->gadget, value);
+}
+
static irqreturn_t at91_vbus_irq(int irq, void *_udc)
{
struct at91_udc *udc = _udc;
- unsigned value;
/* vbus needs at least brief debouncing */
udelay(10);
- value = gpio_get_value(udc->board.vbus_pin);
- if (value != udc->vbus)
- at91_vbus_session(&udc->gadget, value);
+ at91_vbus_update(udc);
return IRQ_HANDLED;
}
+static void at91_vbus_timer(unsigned long data)
+{
+ struct at91_udc *udc = (struct at91_udc *)data;
+
+ at91_vbus_update(udc);
+ if (!timer_pending(&udc->vbus_timer))
+ mod_timer(&udc->vbus_timer, jiffies + VBUS_POLL_TIMEOUT);
+}
+
int usb_gadget_register_driver (struct usb_gadget_driver *driver)
{
struct at91_udc *udc = &controller;
@@ -1764,12 +1782,19 @@ static int __init at91udc_probe(struct platform_device *pdev)
* a pending interrupt.
*/
udc->vbus = gpio_get_value(udc->board.vbus_pin);
- if (request_irq(udc->board.vbus_pin, at91_vbus_irq,
- IRQF_DISABLED, driver_name, udc)) {
- DBG("request vbus irq %d failed\n",
- udc->board.vbus_pin);
- retval = -EBUSY;
- goto fail3;
+ if (udc->board.vbus_polled) {
+ setup_timer(&udc->vbus_timer, at91_vbus_timer,
+ (unsigned long)udc);
+ mod_timer(&udc->vbus_timer,
+ jiffies + VBUS_POLL_TIMEOUT);
+ } else {
+ if (request_irq(udc->board.vbus_pin, at91_vbus_irq,
+ IRQF_DISABLED, driver_name, udc)) {
+ DBG("request vbus irq %d failed\n",
+ udc->board.vbus_pin);
+ retval = -EBUSY;
+ goto fail3;
+ }
}
} else {
DBG("no VBUS detection, assuming always-on\n");
diff --git a/drivers/usb/gadget/at91_udc.h b/drivers/usb/gadget/at91_udc.h
index c65d622..2ebd665 100644
--- a/drivers/usb/gadget/at91_udc.h
+++ b/drivers/usb/gadget/at91_udc.h
@@ -144,6 +144,7 @@ struct at91_udc {
struct proc_dir_entry *pde;
void __iomem *udp_baseaddr;
int udp_irq;
+ struct timer_list vbus_timer;
};
static inline struct at91_udc *to_udc(struct usb_gadget *g)
--
1.5.5.1
^ permalink raw reply related [flat|nested] 5+ messages in thread* [PATCH 3/3] at91: Add support for Bluewater Systems Snapper 9260/9G20 modules
2010-06-16 21:20 [PATCH 0/3] at91: Add support for Snapper 9260/9G20 modules Ryan Mallon
2010-06-16 21:20 ` [PATCH 1/3] AT91: Define NR_BUILTIN_GPIO Ryan Mallon
2010-06-16 21:20 ` [PATCH 2/3] at91_udc: Add vbus polarity and polling mode Ryan Mallon
@ 2010-06-16 21:20 ` Ryan Mallon
2 siblings, 0 replies; 5+ messages in thread
From: Ryan Mallon @ 2010-06-16 21:20 UTC (permalink / raw)
To: linux-arm-kernel
Add support for Bluewater Systems Snapper 9260/9G20 modules
Signed-off-by: Ryan Mallon <ryan@bluewatersys.com>
---
arch/arm/mach-at91/Kconfig | 11 ++
arch/arm/mach-at91/Makefile | 3 +
arch/arm/mach-at91/board-snapper9260.c | 189 ++++++++++++++++++++++++++++++++
3 files changed, 203 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-at91/board-snapper9260.c
diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
index 841eaf8..939bccd 100644
--- a/arch/arm/mach-at91/Kconfig
+++ b/arch/arm/mach-at91/Kconfig
@@ -366,6 +366,17 @@ config MACH_STAMP9G20
endif
+if (ARCH_AT91SAM9260 || ARCH_AT91SAM9G20)
+comment "AT91SAM9260/AT91SAM9G20 boards"
+
+config MACH_SNAPPER_9260
+ bool "Bluewater Systems Snapper 9260/9G20 module"
+ help
+ Select this if you are using the Bluewater Systems Snapper 9260 or
+ Snapper 9G20 modules.
+ <http://www.bluewatersys.com/>
+endif
+
# ----------------------------------------------------------
if ARCH_AT91SAM9G45
diff --git a/arch/arm/mach-at91/Makefile b/arch/arm/mach-at91/Makefile
index c1f821e..ca2ac00 100644
--- a/arch/arm/mach-at91/Makefile
+++ b/arch/arm/mach-at91/Makefile
@@ -66,6 +66,9 @@ obj-$(CONFIG_MACH_CPU9G20) += board-cpu9krea.o
obj-$(CONFIG_MACH_STAMP9G20) += board-stamp9g20.o
obj-$(CONFIG_MACH_PORTUXG20) += board-stamp9g20.o
+# AT91SAM9260/AT91SAM9G20 board-specific support
+obj-$(CONFIG_MACH_SNAPPER_9260) += board-snapper9260.o
+
# AT91SAM9G45 board-specific support
obj-$(CONFIG_MACH_AT91SAM9G45EKES) += board-sam9m10g45ek.o
diff --git a/arch/arm/mach-at91/board-snapper9260.c b/arch/arm/mach-at91/board-snapper9260.c
new file mode 100644
index 0000000..91ed809
--- /dev/null
+++ b/arch/arm/mach-at91/board-snapper9260.c
@@ -0,0 +1,189 @@
+/*
+ * linux/arch/arm/mach-at91/board-snapper9260.c
+ *
+ * Copyright (C) 2010 Bluewater System Ltd
+ *
+ * Author: Andre Renaud <andre@bluewatersys.com>
+ * Author: Ryan Mallon <ryan@bluewatersys.com>
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/gpio.h>
+#include <linux/platform_device.h>
+#include <linux/spi/spi.h>
+#include <linux/i2c/pca953x.h>
+
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+
+#include <mach/hardware.h>
+#include <mach/board.h>
+#include <mach/at91sam9_smc.h>
+
+#include "sam9_smc.h"
+#include "generic.h"
+
+#define SNAPPER9260_IO_EXP_GPIO(x) (NR_BUILTIN_GPIO + (x))
+
+static void __init snapper9260_map_io(void)
+{
+ at91sam9260_initialize(18432000);
+
+ /* Debug on ttyS0 */
+ at91_register_uart(0, 0, 0);
+ at91_set_serial_console(0);
+
+ at91_register_uart(AT91SAM9260_ID_US0, 1,
+ ATMEL_UART_CTS | ATMEL_UART_RTS);
+ at91_register_uart(AT91SAM9260_ID_US1, 2,
+ ATMEL_UART_CTS | ATMEL_UART_RTS);
+ at91_register_uart(AT91SAM9260_ID_US2, 3, 0);
+}
+
+static void __init snapper9260_init_irq(void)
+{
+ at91sam9260_init_interrupts(NULL);
+}
+
+static struct at91_usbh_data __initdata snapper9260_usbh_data = {
+ .ports = 2,
+};
+
+static struct at91_udc_data __initdata snapper9260_udc_data = {
+ .vbus_pin = SNAPPER9260_IO_EXP_GPIO(5),
+ .vbus_active_low = 1,
+ .vbus_polled = 1,
+};
+
+static struct at91_eth_data snapper9260_macb_data = {
+ .is_rmii = 1,
+};
+
+static struct mtd_partition __initdata snapper9260_nand_partitions[] = {
+ {
+ .name = "Preboot",
+ .offset = 0,
+ .size = SZ_128K,
+ },
+ {
+ .name = "Bootloader",
+ .offset = MTDPART_OFS_APPEND,
+ .size = SZ_256K,
+ },
+ {
+ .name = "Environment",
+ .offset = MTDPART_OFS_APPEND,
+ .size = SZ_128K,
+ },
+ {
+ .name = "Kernel",
+ .offset = MTDPART_OFS_APPEND,
+ .size = SZ_4M,
+ },
+ {
+ .name = "Filesystem",
+ .offset = MTDPART_OFS_APPEND,
+ .size = MTDPART_SIZ_FULL,
+ },
+};
+
+static struct mtd_partition * __init
+snapper9260_nand_partition_info(int size, int *num_partitions)
+{
+ *num_partitions = ARRAY_SIZE(snapper9260_nand_partitions);
+ return snapper9260_nand_partitions;
+}
+
+static struct atmel_nand_data __initdata snapper9260_nand_data = {
+ .ale = 21,
+ .cle = 22,
+ .rdy_pin = AT91_PIN_PC13,
+ .partition_info = snapper9260_nand_partition_info,
+ .bus_width_16 = 0,
+};
+
+static struct sam9_smc_config __initdata snapper9260_nand_smc_config = {
+ .ncs_read_setup = 0,
+ .nrd_setup = 0,
+ .ncs_write_setup = 0,
+ .nwe_setup = 0,
+
+ .ncs_read_pulse = 5,
+ .nrd_pulse = 2,
+ .ncs_write_pulse = 5,
+ .nwe_pulse = 2,
+
+ .read_cycle = 7,
+ .write_cycle = 7,
+
+ .mode = (AT91_SMC_READMODE | AT91_SMC_WRITEMODE |
+ AT91_SMC_EXNWMODE_DISABLE),
+ .tdf_cycles = 1,
+};
+
+static struct pca953x_platform_data snapper9260_io_expander_data = {
+ .gpio_base = SNAPPER9260_IO_EXP_GPIO(0),
+};
+
+static struct i2c_board_info __initdata snapper9260_i2c_devices[] = {
+ {
+ /* IO expander */
+ I2C_BOARD_INFO("max7312", 0x28),
+ .platform_data = &snapper9260_io_expander_data,
+ },
+ {
+ /* Audio codec */
+ I2C_BOARD_INFO("tlv320aic23", 0x1a),
+ },
+ {
+ /* RTC */
+ I2C_BOARD_INFO("isl1208", 0x6f),
+ },
+};
+
+static void __init snapper9260_add_device_nand(void)
+{
+ at91_set_A_periph(AT91_PIN_PC14, 0);
+ sam9_smc_configure(3, &snapper9260_nand_smc_config);
+ at91_add_device_nand(&snapper9260_nand_data);
+}
+
+static void __init snapper9260_board_init(void)
+{
+ at91_add_device_i2c(snapper9260_i2c_devices,
+ ARRAY_SIZE(snapper9260_i2c_devices));
+ at91_add_device_serial();
+ at91_add_device_usbh(&snapper9260_usbh_data);
+ at91_add_device_udc(&snapper9260_udc_data);
+ at91_add_device_eth(&snapper9260_macb_data);
+ at91_add_device_ssc(AT91SAM9260_ID_SSC, (ATMEL_SSC_TF | ATMEL_SSC_TK |
+ ATMEL_SSC_TD | ATMEL_SSC_RD));
+ snapper9260_add_device_nand();
+}
+
+MACHINE_START(SNAPPER_9260, "Bluewater Systems Snapper 9260/9G20 module")
+ .phys_io = AT91_BASE_SYS,
+ .io_pg_offst = (AT91_VA_BASE_SYS >> 18) & 0xfffc,
+ .boot_params = AT91_SDRAM_BASE + 0x100,
+ .timer = &at91sam926x_timer,
+ .map_io = snapper9260_map_io,
+ .init_irq = snapper9260_init_irq,
+ .init_machine = snapper9260_board_init,
+MACHINE_END
+
+
--
1.5.5.1
^ permalink raw reply related [flat|nested] 5+ messages in thread