hisilicon: hi6220: Add a hi6220 pinmux driver.

This patch adds basic pinmux support for the hi6220 SoC,
which is found on the hikey board.

Signed-off-by: Peter Griffin <peter.griffin@linaro.org>

arch/arm/cpu/armv8/Makefile

@@ -17,3 +17,4 @@ obj-y	+= transition.o
 
 obj-$(CONFIG_FSL_LSCH3) += fsl-lsch3/
 obj-$(CONFIG_ARCH_ZYNQMP) += zynqmp/
+obj-$(CONFIG_TARGET_HIKEY) += hisilicon/

arch/arm/cpu/armv8/hisilicon/Makefile

+#
+# (C) Copyright 2015 Linaro
+# Peter Griffin <peter.griffin@linaro.org>
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y	+= pinmux.o

arch/arm/cpu/armv8/hisilicon/pinmux.c

+/*
+ * Copyright (C) 2015 Linaro.
+ * Peter Griffin <peter.griffin@linaro.org>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <fdtdec.h>
+#include <asm/gpio.h>
+#include <asm/io.h>
+#include <asm/arch/pinmux.h>
+
+struct hi6220_pinmux0_regs *pmx0 =
+	(struct hi6220_pinmux0_regs *)HI6220_PINMUX0_BASE;
+
+struct hi6220_pinmux1_regs *pmx1 =
+	(struct hi6220_pinmux1_regs *)HI6220_PINMUX1_BASE;
+
+static void hi6220_uart_config(int peripheral)
+{
+	switch (peripheral) {
+	case PERIPH_ID_UART0:
+		writel(MUX_M0, &pmx0->iomg[48]); /* UART0_RXD */
+		writel(MUX_M0, &pmx0->iomg[49]); /* UART0_TXD */
+
+		writel(DRIVE1_02MA | PULL_UP, &pmx1->iocfg[49]); /* UART0_RXD */
+		writel(DRIVE1_02MA | PULL_UP, &pmx1->iocfg[50]); /* UART0_TXD */
+		break;
+
+	case PERIPH_ID_UART1:
+		writel(MUX_M0, &pmx0->iomg[50]); /* UART1_CTS_N */
+		writel(MUX_M0, &pmx0->iomg[51]); /* UART1_RTS_N */
+		writel(MUX_M0, &pmx0->iomg[52]); /* UART1_RXD */
+		writel(MUX_M0, &pmx0->iomg[53]); /* UART1_TXD */
+
+		writel(DRIVE1_02MA | PULL_UP, &pmx1->iocfg[51]); /*UART1_CTS_N*/
+		writel(DRIVE1_02MA | PULL_UP, &pmx1->iocfg[53]); /* UART1_RXD */
+		writel(DRIVE1_02MA, &pmx1->iocfg[52]); /* UART1_RTS_N */
+		writel(DRIVE1_02MA, &pmx1->iocfg[54]); /* UART1_TXD */
+		break;
+
+	case PERIPH_ID_UART2:
+		writel(MUX_M0, &pmx0->iomg[54]); /* UART2_CTS_N */
+		writel(MUX_M0, &pmx0->iomg[55]); /* UART2_RTS_N */
+		writel(MUX_M0, &pmx0->iomg[56]); /* UART2_RXD */
+		writel(MUX_M0, &pmx0->iomg[57]); /* UART2_TXD */
+
+		writel(DRIVE1_02MA, &pmx1->iocfg[55]); /* UART2_CTS_N */
+		writel(DRIVE1_02MA, &pmx1->iocfg[56]); /* UART2_RTS_N */
+		writel(DRIVE1_02MA, &pmx1->iocfg[57]); /* UART2_RXD */
+		writel(DRIVE1_02MA, &pmx1->iocfg[58]); /* UART2_TXD */
+		break;
+
+	case PERIPH_ID_UART3:
+		writel(MUX_M1, &pmx0->iomg[96]); /* UART3_CTS_N */
+		writel(MUX_M1, &pmx0->iomg[97]); /* UART3_RTS_N */
+		writel(MUX_M1, &pmx0->iomg[98]); /* UART3_RXD */
+		writel(MUX_M1, &pmx0->iomg[99]); /* UART3_TXD */
+
+		/* UART3_TXD */
+		writel(DRIVE1_02MA | PULL_DOWN, &pmx1->iocfg[100]);
+		/* UART3_RTS_N */
+		writel(DRIVE1_02MA | PULL_DOWN, &pmx1->iocfg[101]);
+		/* UART3_RXD */
+		writel(DRIVE1_02MA | PULL_DOWN, &pmx1->iocfg[102]);
+		/* UART3_TXD */
+		writel(DRIVE1_02MA | PULL_DOWN, &pmx1->iocfg[103]);
+		break;
+
+	case PERIPH_ID_UART4:
+		writel(MUX_M1, &pmx0->iomg[116]); /* UART4_CTS_N */
+		writel(MUX_M1, &pmx0->iomg[117]); /* UART4_RTS_N */
+		writel(MUX_M1, &pmx0->iomg[118]); /* UART4_RXD */
+		writel(MUX_M1, &pmx0->iomg[119]); /* UART4_TXD */
+
+		/* UART4_CTS_N */
+		writel(DRIVE1_02MA | PULL_DOWN, &pmx1->iocfg[120]);
+		/* UART4_RTS_N */
+		writel(DRIVE1_02MA | PULL_DOWN, &pmx1->iocfg[121]);
+		/* UART4_RXD */
+		writel(DRIVE1_02MA | PULL_DOWN, &pmx1->iocfg[122]);
+		/* UART4_TXD */
+		writel(DRIVE1_02MA | PULL_DOWN, &pmx1->iocfg[123]);
+		break;
+	case PERIPH_ID_UART5:
+		writel(MUX_M1, &pmx0->iomg[114]); /* UART5_RXD */
+		writel(MUX_M1, &pmx0->iomg[115]); /* UART5_TXD */
+
+		/* UART5_RXD */
+		writel(DRIVE1_02MA | PULL_DOWN, &pmx1->iocfg[118]);
+		/* UART5_TXD */
+		writel(DRIVE1_02MA | PULL_DOWN, &pmx1->iocfg[119]);
+
+		break;
+
+	default:
+		debug("%s: invalid peripheral %d", __func__, peripheral);
+		return;
+	}
+}
+
+static int hi6220_mmc_config(int peripheral)
+{
+	u32 tmp;
+
+	switch (peripheral) {
+	case PERIPH_ID_SDMMC0:
+
+		/* eMMC pinmux config */
+		writel(MUX_M0, &pmx0->iomg[64]); /* EMMC_CLK */
+		writel(MUX_M0, &pmx0->iomg[65]); /* EMMC_CMD */
+		writel(MUX_M0, &pmx0->iomg[66]); /* EMMC_DATA0 */
+		writel(MUX_M0, &pmx0->iomg[67]); /* EMMC_DATA1 */
+		writel(MUX_M0, &pmx0->iomg[68]); /* EMMC_DATA2 */
+		writel(MUX_M0, &pmx0->iomg[69]); /* EMMC_DATA3 */
+		writel(MUX_M0, &pmx0->iomg[70]); /* EMMC_DATA4 */
+		writel(MUX_M0, &pmx0->iomg[71]); /* EMMC_DATA5 */
+		writel(MUX_M0, &pmx0->iomg[72]); /* EMMC_DATA6 */
+		writel(MUX_M0, &pmx0->iomg[73]); /* EMMC_DATA7 */
+
+		/*eMMC configure up/down/drive */
+		writel(DRIVE1_08MA, &pmx1->iocfg[65]); /* EMMC_CLK */
+
+		tmp = DRIVE1_04MA | PULL_UP;
+		writel(tmp, &pmx1->iocfg[65]); /* EMMC_CMD */
+		writel(tmp, &pmx1->iocfg[66]); /* EMMC_DATA0 */
+		writel(tmp, &pmx1->iocfg[67]); /* EMMC_DATA1 */
+		writel(tmp, &pmx1->iocfg[68]); /* EMMC_DATA2 */
+		writel(tmp, &pmx1->iocfg[69]); /* EMMC_DATA3 */
+		writel(tmp, &pmx1->iocfg[70]); /* EMMC_DATA4 */
+		writel(tmp, &pmx1->iocfg[71]); /* EMMC_DATA5 */
+		writel(tmp, &pmx1->iocfg[72]); /* EMMC_DATA6 */
+		writel(tmp, &pmx1->iocfg[73]); /* EMMC_DATA7 */
+
+		writel(DRIVE1_04MA, &pmx1->iocfg[73]); /* EMMC_RST_N */
+		break;
+
+	case PERIPH_ID_SDMMC1:
+
+		writel(MUX_M0, &pmx0->iomg[3]); /* SD_CLK */
+		writel(MUX_M0, &pmx0->iomg[4]); /* SD_CMD */
+		writel(MUX_M0, &pmx0->iomg[5]); /* SD_DATA0 */
+		writel(MUX_M0, &pmx0->iomg[6]); /* SD_DATA1 */
+		writel(MUX_M0, &pmx0->iomg[7]); /* SD_DATA2 */
+		writel(MUX_M0, &pmx0->iomg[8]); /* SD_DATA3 */
+
+		writel(DRIVE1_10MA | BIT(2), &pmx1->iocfg[3]); /*SD_CLK*/
+		writel(DRIVE1_08MA | BIT(2), &pmx1->iocfg[4]); /*SD_CMD*/
+		writel(DRIVE1_08MA | BIT(2), &pmx1->iocfg[5]); /*SD_DATA0*/
+		writel(DRIVE1_08MA | BIT(2), &pmx1->iocfg[6]); /*SD_DATA1*/
+		writel(DRIVE1_08MA | BIT(2), &pmx1->iocfg[7]); /*SD_DATA2*/
+		writel(DRIVE1_08MA | BIT(2), &pmx1->iocfg[8]); /*SD_DATA3*/
+		break;
+
+	default:
+		debug("%s: invalid peripheral %d", __func__, peripheral);
+		return -1;
+	}
+
+	return 0;
+}
+
+int hi6220_pinmux_config(int peripheral)
+{
+	switch (peripheral) {
+	case PERIPH_ID_UART0:
+	case PERIPH_ID_UART1:
+	case PERIPH_ID_UART2:
+	case PERIPH_ID_UART3:
+		hi6220_uart_config(peripheral);
+		break;
+	case PERIPH_ID_SDMMC0:
+	case PERIPH_ID_SDMMC1:
+		return hi6220_mmc_config(peripheral);
+	default:
+		debug("%s: invalid peripheral %d", __func__, peripheral);
+		return -1;
+	}
+
+	return 0;
+}
+
+

arch/arm/include/asm/arch-hi6220/periph.h

+/*
+ * Copyright (C) 2015 Linaro
+ * Peter Griffin <peter.griffin@linaro.org>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __ASM_ARM_ARCH_PERIPH_H
+#define __ASM_ARM_ARCH_PERIPH_H
+
+/*
+ * Peripherals required for pinmux configuration. List will
+ * grow with support for more devices getting added.
+ * Numbering based on interrupt table.
+ *
+ */
+enum periph_id {
+	PERIPH_ID_UART0 = 36,
+	PERIPH_ID_UART1,
+	PERIPH_ID_UART2,
+	PERIPH_ID_UART3,
+	PERIPH_ID_UART4,
+	PERIPH_ID_UART5,
+	PERIPH_ID_SDMMC0 = 72,
+	PERIPH_ID_SDMMC1,
+
+	PERIPH_ID_NONE = -1,
+};
+
+#endif /* __ASM_ARM_ARCH_PERIPH_H */

arch/arm/include/asm/arch-hi6220/pinmux.h

+/*
+ * Copyright (C) 2015 Linaro
+ * Peter Griffin <peter.griffin@linaro.org>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __ASM_ARM_ARCH_PINMUX_H
+#define __ASM_ARM_ARCH_PINMUX_H
+
+#include "periph.h"
+
+
+/* iomg bit definition */
+#define MUX_M0          0
+#define MUX_M1          1
+#define MUX_M2          2
+#define MUX_M3          3
+#define MUX_M4          4
+#define MUX_M5          5
+#define MUX_M6          6
+#define MUX_M7          7
+
+/* iocg bit definition */
+#define PULL_MASK       (3)
+#define PULL_DIS        (0)
+#define PULL_UP         (1 << 0)
+#define PULL_DOWN       (1 << 1)
+
+/* drive strength definition */
+#define DRIVE_MASK      (7 << 4)
+#define DRIVE1_02MA     (0 << 4)
+#define DRIVE1_04MA     (1 << 4)
+#define DRIVE1_08MA     (2 << 4)
+#define DRIVE1_10MA     (3 << 4)
+#define DRIVE2_02MA     (0 << 4)
+#define DRIVE2_04MA     (1 << 4)
+#define DRIVE2_08MA     (2 << 4)
+#define DRIVE2_10MA     (3 << 4)
+#define DRIVE3_04MA     (0 << 4)
+#define DRIVE3_08MA     (1 << 4)
+#define DRIVE3_12MA     (2 << 4)
+#define DRIVE3_16MA     (3 << 4)
+#define DRIVE3_20MA     (4 << 4)
+#define DRIVE3_24MA     (5 << 4)
+#define DRIVE3_32MA     (6 << 4)
+#define DRIVE3_40MA     (7 << 4)
+#define DRIVE4_02MA     (0 << 4)
+#define DRIVE4_04MA     (2 << 4)
+#define DRIVE4_08MA     (4 << 4)
+#define DRIVE4_10MA     (6 << 4)
+
+#define HI6220_PINMUX0_BASE 0xf7010000
+#define HI6220_PINMUX1_BASE 0xf7010800
+
+#ifndef	__ASSEMBLY__
+
+/* maybe more registers, but highest used is 123 */
+#define REG_NUM 123
+
+struct hi6220_pinmux0_regs {
+	uint32_t	iomg[REG_NUM];
+};
+
+struct hi6220_pinmux1_regs {
+	uint32_t	iocfg[REG_NUM];
+};
+
+#endif
+
+/**
+ * Configures the pinmux for a particular peripheral.
+ *
+ * This function will configure the peripheral pinmux along with
+ * pull-up/down and drive strength.
+ *
+ * @param peripheral	peripheral to be configured
+ * @return 0 if ok, -1 on error (e.g. unsupported peripheral)
+ */
+int hi6220_pinmux_config(int peripheral);
+
+#endif