[U-Boot] [PATCH v3 2/9] sunxi: add sun7i pinmux and gpio support

Ian Campbell
2014-04-18T18:05:43Z

This patch adds the basic pinmux and gpio support for the Allwinner A20 (sun7i)
processor. This code will not been compiled until the build is hooked up in a
later patch. It has been split out to keep the patches manageable.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Ma Haijun <mahaijuns@gmail.com>
Signed-off-by: Oliver Schinagl <oliver@schinagl.nl>
Signed-off-by: Henrik Nordstr?m <henrik@henriknordstrom.net>
Signed-off-by: Ian Campbell <ijc@hellion.org.uk>
Reviewed-by: Tom Rini <trini@ti.com>
Cc: Stefan Roese <sr@denx.de>
Cc: Tom Cubie <Mr.hipboi@gmail.com>
---
v3: Based on c89867dca2e9 "sunxi: clocks: clock_get_pll5
prototype and coding style".

v2: Based on u-boot-sunxi.git#sunxi d9aa5dd3d15c "sunxi: mmc:
checkpatch whitespace fixes" with v2014.04-rc2 merged in:
- Additional pin definitions

v1: Based on u-boot-sunxi.git#sunxi commit d854c4de2f57 "arm: Handle .gnu.hash
section in ldscripts" vs v2014.01.
---
arch/arm/cpu/armv7/sunxi/Makefile | 1 +
arch/arm/cpu/armv7/sunxi/pinmux.c | 61 ++++++++++++++
arch/arm/include/asm/arch-sunxi/gpio.h | 147 +++++++++++++++++++++++++++++++++
3 files changed, 209 insertions(+)
create mode 100644 arch/arm/cpu/armv7/sunxi/pinmux.c
create mode 100644 arch/arm/include/asm/arch-sunxi/gpio.h

diff --git a/arch/arm/cpu/armv7/sunxi/Makefile b/arch/arm/cpu/armv7/sunxi/Makefile
index 440d266..529e7ec 100644
--- a/arch/arm/cpu/armv7/sunxi/Makefile
+++ b/arch/arm/cpu/armv7/sunxi/Makefile
@@ -9,4 +9,5 @@
#
obj-y += timer.o
obj-y += clock.o
+obj-y += pinmux.o
obj-$(CONFIG_SUN7I) += clock_sun4i.o
diff --git a/arch/arm/cpu/armv7/sunxi/pinmux.c b/arch/arm/cpu/armv7/sunxi/pinmux.c
new file mode 100644
index 0000000..1f2843f
--- /dev/null
+++ b/arch/arm/cpu/armv7/sunxi/pinmux.c
@@ -0,0 +1,61 @@
+/*
+ * (C) Copyright 2007-2011
+ * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
+ * Tom Cubie <tangliang@allwinnertech.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/gpio.h>
+
+int sunxi_gpio_set_cfgpin(u32 pin, u32 val)
+{
+ u32 bank = GPIO_BANK(pin);
+ u32 index = GPIO_CFG_INDEX(pin);
+ u32 offset = GPIO_CFG_OFFSET(pin);
+ struct sunxi_gpio *pio = BANK_TO_GPIO(bank);
+
+ clrsetbits_le32(&pio->cfg[0] + index, 0xf << offset, val << offset);
+
+ return 0;
+}
+
+int sunxi_gpio_get_cfgpin(u32 pin)
+{
+ u32 cfg;
+ u32 bank = GPIO_BANK(pin);
+ u32 index = GPIO_CFG_INDEX(pin);
+ u32 offset = GPIO_CFG_OFFSET(pin);
+ struct sunxi_gpio *pio = BANK_TO_GPIO(bank);
+
+ cfg = readl(&pio->cfg[0] + index);
+ cfg >>= offset;
+
+ return cfg & 0xf;
+}
+
+int sunxi_gpio_set_drv(u32 pin, u32 val)
+{
+ u32 bank = GPIO_BANK(pin);
+ u32 index = GPIO_DRV_INDEX(pin);
+ u32 offset = GPIO_DRV_OFFSET(pin);
+ struct sunxi_gpio *pio = BANK_TO_GPIO(bank);
+
+ clrsetbits_le32(&pio->drv[0] + index, 0x3 << offset, val << offset);
+
+ return 0;
+}
+
+int sunxi_gpio_set_pull(u32 pin, u32 val)
+{
+ u32 bank = GPIO_BANK(pin);
+ u32 index = GPIO_PULL_INDEX(pin);
+ u32 offset = GPIO_PULL_OFFSET(pin);
+ struct sunxi_gpio *pio = BANK_TO_GPIO(bank);
+
+ clrsetbits_le32(&pio->pull[0] + index, 0x3 << offset, val << offset);
+
+ return 0;
+}
diff --git a/arch/arm/include/asm/arch-sunxi/gpio.h b/arch/arm/include/asm/arch-sunxi/gpio.h
new file mode 100644
index 0000000..892479c
--- /dev/null
+++ b/arch/arm/include/asm/arch-sunxi/gpio.h
@@ -0,0 +1,147 @@
+/*
+ * (C) Copyright 2007-2012
+ * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
+ * Tom Cubie <tangliang@allwinnertech.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef _SUNXI_GPIO_H
+#define _SUNXI_GPIO_H
+
+#include <linux/types.h>
+
+/*
+ * sunxi has 9 banks of gpio, they are:
+ * PA0 - PA17 | PB0 - PB23 | PC0 - PC24
+ * PD0 - PD27 | PE0 - PE31 | PF0 - PF5
+ * PG0 - PG9 | PH0 - PH27 | PI0 - PI12
+ */
+
+#define SUNXI_GPIO_A 0
+#define SUNXI_GPIO_B 1
+#define SUNXI_GPIO_C 2
+#define SUNXI_GPIO_D 3
+#define SUNXI_GPIO_E 4
+#define SUNXI_GPIO_F 5
+#define SUNXI_GPIO_G 6
+#define SUNXI_GPIO_H 7
+#define SUNXI_GPIO_I 8
+#define SUNXI_GPIO_BANKS 9
+
+struct sunxi_gpio {
+ u32 cfg[4];
+ u32 dat;
+ u32 drv[2];
+ u32 pull[2];
+};
+
+/* gpio interrupt control */
+struct sunxi_gpio_int {
+ u32 cfg[3];
+ u32 ctl;
+ u32 sta;
+ u32 deb; /* interrupt debounce */
+};
+
+struct sunxi_gpio_reg {
+ struct sunxi_gpio gpio_bank[SUNXI_GPIO_BANKS];
+ u8 res[0xbc];
+ struct sunxi_gpio_int gpio_int;
+};
+
+#define BANK_TO_GPIO(bank) \
+ &((struct sunxi_gpio_reg *)SUNXI_PIO_BASE)->gpio_bank[bank]
+
+#define GPIO_BANK(pin) ((pin) >> 5)
+#define GPIO_NUM(pin) ((pin) & 0x1f)
+
+#define GPIO_CFG_INDEX(pin) (((pin) & 0x1f) >> 3)
+#define GPIO_CFG_OFFSET(pin) ((((pin) & 0x1f) & 0x7) << 2)
+
+#define GPIO_DRV_INDEX(pin) (((pin) & 0x1f) >> 4)
+#define GPIO_DRV_OFFSET(pin) ((((pin) & 0x1f) & 0xf) << 1)
+
+#define GPIO_PULL_INDEX(pin) (((pin) & 0x1f) >> 4)
+#define GPIO_PULL_OFFSET(pin) ((((pin) & 0x1f) & 0xf) << 1)
+
+/* GPIO bank sizes */
+#define SUNXI_GPIO_A_NR 32
+#define SUNXI_GPIO_B_NR 32
+#define SUNXI_GPIO_C_NR 32
+#define SUNXI_GPIO_D_NR 32
+#define SUNXI_GPIO_E_NR 32
+#define SUNXI_GPIO_F_NR 32
+#define SUNXI_GPIO_G_NR 32
+#define SUNXI_GPIO_H_NR 32
+#define SUNXI_GPIO_I_NR 32
+
+#define SUNXI_GPIO_NEXT(__gpio) \
+ ((__gpio##_START) + (__gpio##_NR) + 0)
+
+enum sunxi_gpio_number {
+ SUNXI_GPIO_A_START = 0,
+ SUNXI_GPIO_B_START = SUNXI_GPIO_NEXT(SUNXI_GPIO_A),
+ SUNXI_GPIO_C_START = SUNXI_GPIO_NEXT(SUNXI_GPIO_B),
+ SUNXI_GPIO_D_START = SUNXI_GPIO_NEXT(SUNXI_GPIO_C),
+ SUNXI_GPIO_E_START = SUNXI_GPIO_NEXT(SUNXI_GPIO_D),
+ SUNXI_GPIO_F_START = SUNXI_GPIO_NEXT(SUNXI_GPIO_E),
+ SUNXI_GPIO_G_START = SUNXI_GPIO_NEXT(SUNXI_GPIO_F),
+ SUNXI_GPIO_H_START = SUNXI_GPIO_NEXT(SUNXI_GPIO_G),
+ SUNXI_GPIO_I_START = SUNXI_GPIO_NEXT(SUNXI_GPIO_H),
+};
+
+/* SUNXI GPIO number definitions */
+#define SUNXI_GPA(_nr) (SUNXI_GPIO_A_START + (_nr))
+#define SUNXI_GPB(_nr) (SUNXI_GPIO_B_START + (_nr))
+#define SUNXI_GPC(_nr) (SUNXI_GPIO_C_START + (_nr))
+#define SUNXI_GPD(_nr) (SUNXI_GPIO_D_START + (_nr))
+#define SUNXI_GPE(_nr) (SUNXI_GPIO_E_START + (_nr))
+#define SUNXI_GPF(_nr) (SUNXI_GPIO_F_START + (_nr))
+#define SUNXI_GPG(_nr) (SUNXI_GPIO_G_START + (_nr))
+#define SUNXI_GPH(_nr) (SUNXI_GPIO_H_START + (_nr))
+#define SUNXI_GPI(_nr) (SUNXI_GPIO_I_START + (_nr))
+
+/* GPIO pin function config */
+#define SUNXI_GPIO_INPUT 0
+#define SUNXI_GPIO_OUTPUT 1
+
+#define SUNXI_GPA0_EMAC 2
+#define SUN7I_GPA0_GMAC 5
+
+#define SUNXI_GPB0_TWI0 2
+
+#define SUN4I_GPB22_UART0_TX 2
+#define SUN4I_GPB23_UART0_RX 2
+
+#define SUN5I_GPB19_UART0_TX 2
+#define SUN5I_GPB20_UART0_RX 2
+
+#define SUN5I_GPG3_UART1_TX 4
+#define SUN5I_GPG4_UART1_RX 4
+
+#define SUNXI_GPC6_SDC2 3
+
+#define SUNXI_GPF0_SDC0 2
+
+#define SUNXI_GPF2_SDC0 2
+#define SUNXI_GPF2_UART0_TX 4
+#define SUNXI_GPF4_UART0_RX 4
+
+#define SUN4I_GPG0_SDC1 4
+
+#define SUN4I_GPH22_SDC1 5
+
+#define SUN4I_GPI4_SDC3 2
+
+/* GPIO pin pull-up/down config */
+#define SUNXI_GPIO_PULL_DISABLE 0
+#define SUNXI_GPIO_PULL_UP 1
+#define SUNXI_GPIO_PULL_DOWN 2
+
+int sunxi_gpio_set_cfgpin(u32 pin, u32 val);
+int sunxi_gpio_get_cfgpin(u32 pin);
+int sunxi_gpio_set_drv(u32 pin, u32 val);
+int sunxi_gpio_set_pull(u32 pin, u32 val);
+
+#endif /* _SUNXI_GPIO_H */
--
1.9.0