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Message-Id: <201112200324.22057.jkrzyszt@tis.icnet.pl>
Date: Tue, 20 Dec 2011 03:24:21 +0100
From: Janusz Krzysztofik <jkrzyszt@....icnet.pl>
To: Tony Lindgren <tony@...mide.com>
Cc: linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org,
Grant Likely <grant.likely@...retlab.ca>
Subject: [PATCH v2 2/7 v2] ARM: OMAP1: ams-delta: convert latches to basic_mmio_gpio
Resubmitting with the changelog extended.
8<-------------------------
Once ready, ams-delta specific device drivers currently calling custom
ams_delta_latch[12]_write() functions can be updated to call generic
gpio_set_value() instead, which will make them less platform dependent.
Even more, some custom ams-delta only drivers can perhaps be dropped
from the tree after converting selected ams-delta platform devices to
follow generic GPIO based device models.
The latch_gpios[] table is initially filled with all latch1 and latch2
GPIO pins in order to register and initialize them from the board file
until those are handled by respective existing device drivers (leds,
nand, lcd, serio, asoc, serial). That table will get almost empty after
the transision process is completed, holding only pins not used by any
drivers / connected to unused devices, in order to initialize them from
the board file for power saving purposes.
The new ams_delta_latch_write() function is a unified replacement for
those removed ams_delta_latch[12]_write(), and serves as a temporary
wrapper over gpio_set_value(), providing the old API for those not yet
updated device drivers, and will be removed after all custom drivers are
converted or replaced.
Depends on patch 1/7, "ARM: OMAP1: ams-delta: register latch dependent
devices later".
Signed-off-by: Janusz Krzysztofik <jkrzyszt@....icnet.pl>
---
Changes against initial version:
* refreshed on top of patch 1/7, which is the old 1/10 replacement,
* no need to BUG_ON() if GPIO request fails inside late_init(), can
return with error from there instead,
* dropped leading underscores from local symbols, variable and function
names (no namespace conflicts expected).
arch/arm/mach-omap1/Kconfig | 1 +
arch/arm/mach-omap1/board-ams-delta.c | 237 ++++++++++++++++++---
arch/arm/plat-omap/include/plat/board-ams-delta.h | 43 +++-
3 files changed, 242 insertions(+), 39 deletions(-)
diff --git a/arch/arm/mach-omap1/Kconfig b/arch/arm/mach-omap1/Kconfig
index 73f287d..d2606b1 100644
--- a/arch/arm/mach-omap1/Kconfig
+++ b/arch/arm/mach-omap1/Kconfig
@@ -155,6 +155,7 @@ config MACH_AMS_DELTA
bool "Amstrad E3 (Delta)"
depends on ARCH_OMAP1 && ARCH_OMAP15XX
select FIQ
+ select GPIO_GENERIC_PLATFORM
help
Support for the Amstrad E3 (codename Delta) videophone. Say Y here
if you have such a device.
diff --git a/arch/arm/mach-omap1/board-ams-delta.c b/arch/arm/mach-omap1/board-ams-delta.c
index 50987c9..cff2711 100644
--- a/arch/arm/mach-omap1/board-ams-delta.c
+++ b/arch/arm/mach-omap1/board-ams-delta.c
@@ -11,6 +11,7 @@
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
+#include <linux/basic_mmio_gpio.h>
#include <linux/gpio.h>
#include <linux/kernel.h>
#include <linux/init.h>
@@ -40,9 +41,6 @@
#include <mach/ams-delta-fiq.h>
-static u8 ams_delta_latch1_reg;
-static u16 ams_delta_latch2_reg;
-
static const unsigned int ams_delta_keymap[] = {
KEY(0, 0, KEY_F1), /* Advert */
@@ -121,39 +119,32 @@ static const unsigned int ams_delta_keymap[] = {
KEY(7, 3, KEY_LEFTCTRL), /* Vol down */
};
-void ams_delta_latch1_write(u8 mask, u8 value)
-{
- ams_delta_latch1_reg &= ~mask;
- ams_delta_latch1_reg |= value;
- *(volatile __u8 *) AMS_DELTA_LATCH1_VIRT = ams_delta_latch1_reg;
-}
-
-void ams_delta_latch2_write(u16 mask, u16 value)
-{
- ams_delta_latch2_reg &= ~mask;
- ams_delta_latch2_reg |= value;
- *(volatile __u16 *) AMS_DELTA_LATCH2_VIRT = ams_delta_latch2_reg;
-}
+#define LATCH1_PHYS 0x01000000
+#define LATCH1_VIRT 0xEA000000
+#define MODEM_PHYS 0x04000000
+#define MODEM_VIRT 0xEB000000
+#define LATCH2_PHYS 0x08000000
+#define LATCH2_VIRT 0xEC000000
static struct map_desc ams_delta_io_desc[] __initdata = {
/* AMS_DELTA_LATCH1 */
{
- .virtual = AMS_DELTA_LATCH1_VIRT,
- .pfn = __phys_to_pfn(AMS_DELTA_LATCH1_PHYS),
+ .virtual = LATCH1_VIRT,
+ .pfn = __phys_to_pfn(LATCH1_PHYS),
.length = 0x01000000,
.type = MT_DEVICE
},
/* AMS_DELTA_LATCH2 */
{
- .virtual = AMS_DELTA_LATCH2_VIRT,
- .pfn = __phys_to_pfn(AMS_DELTA_LATCH2_PHYS),
+ .virtual = LATCH2_VIRT,
+ .pfn = __phys_to_pfn(LATCH2_PHYS),
.length = 0x01000000,
.type = MT_DEVICE
},
/* AMS_DELTA_MODEM */
{
- .virtual = AMS_DELTA_MODEM_VIRT,
- .pfn = __phys_to_pfn(AMS_DELTA_MODEM_PHYS),
+ .virtual = MODEM_VIRT,
+ .pfn = __phys_to_pfn(MODEM_PHYS),
.length = 0x01000000,
.type = MT_DEVICE
}
@@ -173,6 +164,190 @@ static struct omap_board_config_kernel ams_delta_config[] __initdata = {
{ OMAP_TAG_LCD, &ams_delta_lcd_config },
};
+static struct resource latch1_resources[] __initconst = {
+ [0] = {
+ .name = "dat",
+ .start = LATCH1_PHYS,
+ .end = LATCH1_PHYS + (AMS_DELTA_LATCH1_NGPIO - 1) / 8,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+static struct bgpio_pdata latch1_pdata __initconst = {
+ .base = AMS_DELTA_LATCH1_GPIO_BASE,
+ .ngpio = AMS_DELTA_LATCH1_NGPIO,
+};
+
+static struct platform_device latch1_gpio_device = {
+ .name = "basic-mmio-gpio",
+ .id = 0,
+ .resource = latch1_resources,
+ .num_resources = ARRAY_SIZE(latch1_resources),
+ .dev = {
+ .platform_data = &latch1_pdata,
+ },
+};
+
+static struct resource latch2_resources[] __initconst = {
+ [0] = {
+ .name = "dat",
+ .start = LATCH2_PHYS,
+ .end = LATCH2_PHYS + (AMS_DELTA_LATCH2_NGPIO - 1) / 8,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+static struct bgpio_pdata latch2_pdata __initconst = {
+ .base = AMS_DELTA_LATCH2_GPIO_BASE,
+ .ngpio = AMS_DELTA_LATCH2_NGPIO,
+};
+
+static struct platform_device latch2_gpio_device = {
+ .name = "basic-mmio-gpio",
+ .id = 1,
+ .resource = latch2_resources,
+ .num_resources = ARRAY_SIZE(latch2_resources),
+ .dev = {
+ .platform_data = &latch2_pdata,
+ },
+};
+
+static struct gpio latch_gpios[] __initconst = {
+ {
+ .gpio = AMS_DELTA_GPIO_PIN_LED_CAMERA,
+ .flags = GPIOF_OUT_INIT_LOW,
+ .label = "led_camera",
+ },
+ {
+ .gpio = AMS_DELTA_GPIO_PIN_LED_ADVERT,
+ .flags = GPIOF_OUT_INIT_LOW,
+ .label = "led_advert",
+ },
+ {
+ .gpio = AMS_DELTA_GPIO_PIN_LED_EMAIL,
+ .flags = GPIOF_OUT_INIT_LOW,
+ .label = "led_email",
+ },
+ {
+ .gpio = AMS_DELTA_GPIO_PIN_LED_HANDSFREE,
+ .flags = GPIOF_OUT_INIT_LOW,
+ .label = "led_handsfree",
+ },
+ {
+ .gpio = AMS_DELTA_GPIO_PIN_LED_VOICEMAIL,
+ .flags = GPIOF_OUT_INIT_LOW,
+ .label = "led_voicemail",
+ },
+ {
+ .gpio = AMS_DELTA_GPIO_PIN_LED_VOICE,
+ .flags = GPIOF_OUT_INIT_LOW,
+ .label = "led_voice",
+ },
+ {
+ .gpio = AMS_DELTA_LATCH1_GPIO_BASE + 6,
+ .flags = GPIOF_OUT_INIT_LOW,
+ .label = "dockit1",
+ },
+ {
+ .gpio = AMS_DELTA_LATCH1_GPIO_BASE + 7,
+ .flags = GPIOF_OUT_INIT_LOW,
+ .label = "dockit2",
+ },
+ {
+ .gpio = AMS_DELTA_GPIO_PIN_LCD_VBLEN,
+ .flags = GPIOF_OUT_INIT_LOW,
+ .label = "lcd_vblen",
+ },
+ {
+ .gpio = AMS_DELTA_GPIO_PIN_LCD_NDISP,
+ .flags = GPIOF_OUT_INIT_LOW,
+ .label = "lcd_ndisp",
+ },
+ {
+ .gpio = AMS_DELTA_GPIO_PIN_NAND_NCE,
+ .flags = GPIOF_OUT_INIT_LOW,
+ .label = "nand_nce",
+ },
+ {
+ .gpio = AMS_DELTA_GPIO_PIN_NAND_NRE,
+ .flags = GPIOF_OUT_INIT_LOW,
+ .label = "nand_nre",
+ },
+ {
+ .gpio = AMS_DELTA_GPIO_PIN_NAND_NWP,
+ .flags = GPIOF_OUT_INIT_LOW,
+ .label = "nand_nwp",
+ },
+ {
+ .gpio = AMS_DELTA_GPIO_PIN_NAND_NWE,
+ .flags = GPIOF_OUT_INIT_LOW,
+ .label = "nand_nwe",
+ },
+ {
+ .gpio = AMS_DELTA_GPIO_PIN_NAND_ALE,
+ .flags = GPIOF_OUT_INIT_LOW,
+ .label = "nand_ale",
+ },
+ {
+ .gpio = AMS_DELTA_GPIO_PIN_NAND_CLE,
+ .flags = GPIOF_OUT_INIT_LOW,
+ .label = "nand_cle",
+ },
+ {
+ .gpio = AMS_DELTA_GPIO_PIN_KEYBRD_PWR,
+ .flags = GPIOF_OUT_INIT_LOW,
+ .label = "keybrd_pwr",
+ },
+ {
+ .gpio = AMS_DELTA_GPIO_PIN_KEYBRD_DATAOUT,
+ .flags = GPIOF_OUT_INIT_LOW,
+ .label = "keybrd_dataout",
+ },
+ {
+ .gpio = AMS_DELTA_GPIO_PIN_SCARD_RSTIN,
+ .flags = GPIOF_OUT_INIT_LOW,
+ .label = "scard_rstin",
+ },
+ {
+ .gpio = AMS_DELTA_GPIO_PIN_SCARD_CMDVCC,
+ .flags = GPIOF_OUT_INIT_LOW,
+ .label = "scard_cmdvcc",
+ },
+ {
+ .gpio = AMS_DELTA_GPIO_PIN_MODEM_NRESET,
+ .flags = GPIOF_OUT_INIT_LOW,
+ .label = "modem_nreset",
+ },
+ {
+ .gpio = AMS_DELTA_GPIO_PIN_MODEM_CODEC,
+ .flags = GPIOF_OUT_INIT_LOW,
+ .label = "modem_codec",
+ },
+ {
+ .gpio = AMS_DELTA_LATCH2_GPIO_BASE + 14,
+ .flags = GPIOF_OUT_INIT_LOW,
+ .label = "hookflash1",
+ },
+ {
+ .gpio = AMS_DELTA_LATCH2_GPIO_BASE + 15,
+ .flags = GPIOF_OUT_INIT_LOW,
+ .label = "hookflash2",
+ },
+};
+
+void ams_delta_latch_write(int base, int ngpio, u16 mask, u16 value)
+{
+ int bit = 0;
+ u16 bitpos = 1 << bit;
+
+ for (; bit < ngpio; bit++, bitpos = bitpos << 1) {
+ if (!(mask & bitpos))
+ continue;
+ gpio_set_value(base + bit, (value & bitpos) != 0);
+ }
+}
+EXPORT_SYMBOL(ams_delta_latch_write);
+
static struct resource ams_delta_nand_resources[] = {
[0] = {
.start = OMAP1_MPUIO_BASE,
@@ -275,11 +450,13 @@ static struct omap1_cam_platform_data ams_delta_camera_platform_data = {
};
static struct platform_device *ams_delta_devices[] __initdata = {
+ &latch1_gpio_device,
+ &latch2_gpio_device,
&ams_delta_kp_device,
&ams_delta_camera_device,
};
-static struct platform_device *late_devices[] __initdata = {
+static struct platform_device *late_devices[] __initconst = {
&ams_delta_nand_device,
&ams_delta_lcd_device,
&ams_delta_led_device,
@@ -325,8 +502,8 @@ static void __init ams_delta_init(void)
static struct plat_serial8250_port ams_delta_modem_ports[] = {
{
- .membase = IOMEM(AMS_DELTA_MODEM_VIRT),
- .mapbase = AMS_DELTA_MODEM_PHYS,
+ .membase = IOMEM(MODEM_VIRT),
+ .mapbase = MODEM_PHYS,
.irq = -EINVAL, /* changed later */
.flags = UPF_BOOT_AUTOCONF,
.irqflags = IRQF_TRIGGER_RISING,
@@ -352,8 +529,11 @@ static int __init late_init(void)
if (!machine_is_ams_delta())
return -ENODEV;
- /* Clear latch2 (NAND, LCD, modem enable) */
- ams_delta_latch2_write(~0, 0);
+ err = gpio_request_array(latch_gpios, ARRAY_SIZE(latch_gpios));
+ if (err) {
+ pr_err("Couldn't take over latch1/latch2 GPIO pins\n");
+ return err;
+ }
platform_add_devices(late_devices, ARRAY_SIZE(late_devices));
@@ -399,6 +579,3 @@ MACHINE_START(AMS_DELTA, "Amstrad E3 (Delta)")
.init_machine = ams_delta_init,
.timer = &omap1_timer,
MACHINE_END
-
-EXPORT_SYMBOL(ams_delta_latch1_write);
-EXPORT_SYMBOL(ams_delta_latch2_write);
diff --git a/arch/arm/plat-omap/include/plat/board-ams-delta.h b/arch/arm/plat-omap/include/plat/board-ams-delta.h
index 51b102d..68ffe32 100644
--- a/arch/arm/plat-omap/include/plat/board-ams-delta.h
+++ b/arch/arm/plat-omap/include/plat/board-ams-delta.h
@@ -28,13 +28,6 @@
#if defined (CONFIG_MACH_AMS_DELTA)
-#define AMS_DELTA_LATCH1_PHYS 0x01000000
-#define AMS_DELTA_LATCH1_VIRT 0xEA000000
-#define AMS_DELTA_MODEM_PHYS 0x04000000
-#define AMS_DELTA_MODEM_VIRT 0xEB000000
-#define AMS_DELTA_LATCH2_PHYS 0x08000000
-#define AMS_DELTA_LATCH2_VIRT 0xEC000000
-
#define AMS_DELTA_LATCH1_LED_CAMERA 0x01
#define AMS_DELTA_LATCH1_LED_ADVERT 0x02
#define AMS_DELTA_LATCH1_LED_EMAIL 0x04
@@ -66,9 +59,41 @@
#define AMS_DELTA_GPIO_PIN_CONFIG 11
#define AMS_DELTA_GPIO_PIN_NAND_RB 12
+#define AMS_DELTA_GPIO_PIN_LED_CAMERA 232
+#define AMS_DELTA_GPIO_PIN_LED_ADVERT 233
+#define AMS_DELTA_GPIO_PIN_LED_EMAIL 234
+#define AMS_DELTA_GPIO_PIN_LED_HANDSFREE 235
+#define AMS_DELTA_GPIO_PIN_LED_VOICEMAIL 236
+#define AMS_DELTA_GPIO_PIN_LED_VOICE 237
+
+#define AMS_DELTA_GPIO_PIN_LCD_VBLEN 240
+#define AMS_DELTA_GPIO_PIN_LCD_NDISP 241
+#define AMS_DELTA_GPIO_PIN_NAND_NCE 242
+#define AMS_DELTA_GPIO_PIN_NAND_NRE 243
+#define AMS_DELTA_GPIO_PIN_NAND_NWP 244
+#define AMS_DELTA_GPIO_PIN_NAND_NWE 245
+#define AMS_DELTA_GPIO_PIN_NAND_ALE 246
+#define AMS_DELTA_GPIO_PIN_NAND_CLE 247
+#define AMS_DELTA_GPIO_PIN_KEYBRD_PWR 248
+#define AMS_DELTA_GPIO_PIN_KEYBRD_DATAOUT 249
+#define AMS_DELTA_GPIO_PIN_SCARD_RSTIN 250
+#define AMS_DELTA_GPIO_PIN_SCARD_CMDVCC 251
+#define AMS_DELTA_GPIO_PIN_MODEM_NRESET 252
+#define AMS_DELTA_GPIO_PIN_MODEM_CODEC 253
+
+#define AMS_DELTA_LATCH1_GPIO_BASE AMS_DELTA_GPIO_PIN_LED_CAMERA
+#define AMS_DELTA_LATCH1_NGPIO 8
+#define AMS_DELTA_LATCH2_GPIO_BASE AMS_DELTA_GPIO_PIN_LCD_VBLEN
+#define AMS_DELTA_LATCH2_NGPIO 16
+
#ifndef __ASSEMBLY__
-void ams_delta_latch1_write(u8 mask, u8 value);
-void ams_delta_latch2_write(u16 mask, u16 value);
+void ams_delta_latch_write(int base, int ngpio, u16 mask, u16 value);
+#define ams_delta_latch1_write(mask, value) \
+ ams_delta_latch_write(AMS_DELTA_LATCH1_GPIO_BASE, \
+ AMS_DELTA_LATCH1_NGPIO, (mask), (value))
+#define ams_delta_latch2_write(mask, value) \
+ ams_delta_latch_write(AMS_DELTA_LATCH2_GPIO_BASE, \
+ AMS_DELTA_LATCH2_NGPIO, (mask), (value))
#endif
#endif /* CONFIG_MACH_AMS_DELTA */
--
1.7.3.4
--
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