Merge remote-tracking branch 'shesselba/for-mvebu/pinctrl-dove' into mvebu/pinctrl

2 files changed, 175 insertions, 112 deletions

diff --git a/drivers/pinctrl/mvebu/Kconfig b/drivers/pinctrl/mvebu/Kconfig
index 366fa54..8dc4948 100644
--- a/drivers/pinctrl/mvebu/Kconfig
+++ b/drivers/pinctrl/mvebu/Kconfig
@@ -8,6 +8,7 @@ config PINCTRL_MVEBU
 config PINCTRL_DOVE
 	bool
 	select PINCTRL_MVEBU
+	select MFD_SYSCON
 
 config PINCTRL_KIRKWOOD
 	bool
diff --git a/drivers/pinctrl/mvebu/pinctrl-dove.c b/drivers/pinctrl/mvebu/pinctrl-dove.c
index da9ca26..9e7ff65 100644
--- a/drivers/pinctrl/mvebu/pinctrl-dove.c
+++ b/drivers/pinctrl/mvebu/pinctrl-dove.c
@@ -18,40 +18,53 @@
 #include <linux/clk.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
+#include <linux/mfd/syscon.h>
 #include <linux/pinctrl/pinctrl.h>
+#include <linux/regmap.h>
 
 #include "pinctrl-mvebu.h"
 
-#define DOVE_SB_REGS_VIRT_BASE		IOMEM(0xfde00000)
-#define DOVE_MPP_VIRT_BASE		(DOVE_SB_REGS_VIRT_BASE + 0xd0200)
-#define DOVE_PMU_MPP_GENERAL_CTRL	(DOVE_MPP_VIRT_BASE + 0x10)
-#define  DOVE_AU0_AC97_SEL		BIT(16)
-#define DOVE_PMU_SIGNAL_SELECT_0	(DOVE_SB_REGS_VIRT_BASE + 0xd802C)
-#define DOVE_PMU_SIGNAL_SELECT_1	(DOVE_SB_REGS_VIRT_BASE + 0xd8030)
-#define DOVE_GLOBAL_CONFIG_1		(DOVE_SB_REGS_VIRT_BASE + 0xe802C)
-#define DOVE_GLOBAL_CONFIG_1		(DOVE_SB_REGS_VIRT_BASE + 0xe802C)
-#define  DOVE_TWSI_ENABLE_OPTION1	BIT(7)
-#define DOVE_GLOBAL_CONFIG_2		(DOVE_SB_REGS_VIRT_BASE + 0xe8030)
-#define  DOVE_TWSI_ENABLE_OPTION2	BIT(20)
-#define  DOVE_TWSI_ENABLE_OPTION3	BIT(21)
-#define  DOVE_TWSI_OPTION3_GPIO		BIT(22)
-#define DOVE_SSP_CTRL_STATUS_1		(DOVE_SB_REGS_VIRT_BASE + 0xe8034)
-#define  DOVE_SSP_ON_AU1		BIT(0)
-#define DOVE_MPP_GENERAL_VIRT_BASE	(DOVE_SB_REGS_VIRT_BASE + 0xe803c)
-#define  DOVE_AU1_SPDIFO_GPIO_EN	BIT(1)
-#define  DOVE_NAND_GPIO_EN		BIT(0)
-#define DOVE_GPIO_LO_VIRT_BASE		(DOVE_SB_REGS_VIRT_BASE + 0xd0400)
-#define DOVE_MPP_CTRL4_VIRT_BASE	(DOVE_GPIO_LO_VIRT_BASE + 0x40)
-#define  DOVE_SPI_GPIO_SEL		BIT(5)
-#define  DOVE_UART1_GPIO_SEL		BIT(4)
-#define  DOVE_AU1_GPIO_SEL		BIT(3)
-#define  DOVE_CAM_GPIO_SEL		BIT(2)
-#define  DOVE_SD1_GPIO_SEL		BIT(1)
-#define  DOVE_SD0_GPIO_SEL		BIT(0)
+/* Internal registers can be configured at any 1 MiB aligned address */
+#define INT_REGS_MASK		~(SZ_1M - 1)
+#define MPP4_REGS_OFFS		0xd0440
+#define PMU_REGS_OFFS		0xd802c
+#define GC_REGS_OFFS		0xe802c
+
+/* MPP Base registers */
+#define PMU_MPP_GENERAL_CTRL	0x10
+#define  AU0_AC97_SEL		BIT(16)
+
+/* MPP Control 4 register */
+#define SPI_GPIO_SEL		BIT(5)
+#define UART1_GPIO_SEL		BIT(4)
+#define AU1_GPIO_SEL		BIT(3)
+#define CAM_GPIO_SEL		BIT(2)
+#define SD1_GPIO_SEL		BIT(1)
+#define SD0_GPIO_SEL		BIT(0)
+
+/* PMU Signal Select registers */
+#define PMU_SIGNAL_SELECT_0	0x00
+#define PMU_SIGNAL_SELECT_1	0x04
+
+/* Global Config regmap registers */
+#define GLOBAL_CONFIG_1		0x00
+#define  TWSI_ENABLE_OPTION1	BIT(7)
+#define GLOBAL_CONFIG_2		0x04
+#define  TWSI_ENABLE_OPTION2	BIT(20)
+#define  TWSI_ENABLE_OPTION3	BIT(21)
+#define  TWSI_OPTION3_GPIO	BIT(22)
+#define SSP_CTRL_STATUS_1	0x08
+#define  SSP_ON_AU1		BIT(0)
+#define MPP_GENERAL_CONFIG	0x10
+#define  AU1_SPDIFO_GPIO_EN	BIT(1)
+#define  NAND_GPIO_EN		BIT(0)
 
 #define CONFIG_PMU	BIT(4)
 
 static void __iomem *mpp_base;
+static void __iomem *mpp4_base;
+static void __iomem *pmu_base;
+static struct regmap *gconfmap;
 
 static int dove_mpp_ctrl_get(unsigned pid, unsigned long *config)
 {
@@ -67,13 +80,13 @@ static int dove_pmu_mpp_ctrl_get(unsigned pid, unsigned long *config)
 {
 	unsigned off = (pid / MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
 	unsigned shift = (pid % MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
-	unsigned long pmu = readl(DOVE_PMU_MPP_GENERAL_CTRL);
+	unsigned long pmu = readl(mpp_base + PMU_MPP_GENERAL_CTRL);
 	unsigned long func;
 
 	if ((pmu & BIT(pid)) == 0)
 		return default_mpp_ctrl_get(mpp_base, pid, config);
 
-	func = readl(DOVE_PMU_SIGNAL_SELECT_0 + off);
+	func = readl(pmu_base + PMU_SIGNAL_SELECT_0 + off);
 	*config = (func >> shift) & MVEBU_MPP_MASK;
 	*config |= CONFIG_PMU;
 
@@ -84,43 +97,43 @@ static int dove_pmu_mpp_ctrl_set(unsigned pid, unsigned long config)
 {
 	unsigned off = (pid / MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
 	unsigned shift = (pid % MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
-	unsigned long pmu = readl(DOVE_PMU_MPP_GENERAL_CTRL);
+	unsigned long pmu = readl(mpp_base + PMU_MPP_GENERAL_CTRL);
 	unsigned long func;
 
 	if ((config & CONFIG_PMU) == 0) {
-		writel(pmu & ~BIT(pid), DOVE_PMU_MPP_GENERAL_CTRL);
+		writel(pmu & ~BIT(pid), mpp_base + PMU_MPP_GENERAL_CTRL);
 		return default_mpp_ctrl_set(mpp_base, pid, config);
 	}
 
-	writel(pmu | BIT(pid), DOVE_PMU_MPP_GENERAL_CTRL);
-	func = readl(DOVE_PMU_SIGNAL_SELECT_0 + off);
+	writel(pmu | BIT(pid), mpp_base + PMU_MPP_GENERAL_CTRL);
+	func = readl(pmu_base + PMU_SIGNAL_SELECT_0 + off);
 	func &= ~(MVEBU_MPP_MASK << shift);
 	func |= (config & MVEBU_MPP_MASK) << shift;
-	writel(func, DOVE_PMU_SIGNAL_SELECT_0 + off);
+	writel(func, pmu_base + PMU_SIGNAL_SELECT_0 + off);
 
 	return 0;
 }
 
 static int dove_mpp4_ctrl_get(unsigned pid, unsigned long *config)
 {
-	unsigned long mpp4 = readl(DOVE_MPP_CTRL4_VIRT_BASE);
+	unsigned long mpp4 = readl(mpp4_base);
 	unsigned long mask;
 
 	switch (pid) {
 	case 24: /* mpp_camera */
-		mask = DOVE_CAM_GPIO_SEL;
+		mask = CAM_GPIO_SEL;
 		break;
 	case 40: /* mpp_sdio0 */
-		mask = DOVE_SD0_GPIO_SEL;
+		mask = SD0_GPIO_SEL;
 		break;
 	case 46: /* mpp_sdio1 */
-		mask = DOVE_SD1_GPIO_SEL;
+		mask = SD1_GPIO_SEL;
 		break;
 	case 58: /* mpp_spi0 */
-		mask = DOVE_SPI_GPIO_SEL;
+		mask = SPI_GPIO_SEL;
 		break;
 	case 62: /* mpp_uart1 */
-		mask = DOVE_UART1_GPIO_SEL;
+		mask = UART1_GPIO_SEL;
 		break;
 	default:
 		return -EINVAL;
@@ -133,24 +146,24 @@ static int dove_mpp4_ctrl_get(unsigned pid, unsigned long *config)
 
 static int dove_mpp4_ctrl_set(unsigned pid, unsigned long config)
 {
-	unsigned long mpp4 = readl(DOVE_MPP_CTRL4_VIRT_BASE);
+	unsigned long mpp4 = readl(mpp4_base);
 	unsigned long mask;
 
 	switch (pid) {
 	case 24: /* mpp_camera */
-		mask = DOVE_CAM_GPIO_SEL;
+		mask = CAM_GPIO_SEL;
 		break;
 	case 40: /* mpp_sdio0 */
-		mask = DOVE_SD0_GPIO_SEL;
+		mask = SD0_GPIO_SEL;
 		break;
 	case 46: /* mpp_sdio1 */
-		mask = DOVE_SD1_GPIO_SEL;
+		mask = SD1_GPIO_SEL;
 		break;
 	case 58: /* mpp_spi0 */
-		mask = DOVE_SPI_GPIO_SEL;
+		mask = SPI_GPIO_SEL;
 		break;
 	case 62: /* mpp_uart1 */
-		mask = DOVE_UART1_GPIO_SEL;
+		mask = UART1_GPIO_SEL;
 		break;
 	default:
 		return -EINVAL;
@@ -160,69 +173,69 @@ static int dove_mpp4_ctrl_set(unsigned pid, unsigned long config)
 	if (config)
 		mpp4 |= mask;
 
-	writel(mpp4, DOVE_MPP_CTRL4_VIRT_BASE);
+	writel(mpp4, mpp4_base);
 
 	return 0;
 }
 
 static int dove_nand_ctrl_get(unsigned pid, unsigned long *config)
 {
-	unsigned long gmpp = readl(DOVE_MPP_GENERAL_VIRT_BASE);
+	unsigned int gmpp;
 
-	*config = ((gmpp & DOVE_NAND_GPIO_EN) != 0);
+	regmap_read(gconfmap, MPP_GENERAL_CONFIG, &gmpp);
+	*config = ((gmpp & NAND_GPIO_EN) != 0);
 
 	return 0;
 }
 
 static int dove_nand_ctrl_set(unsigned pid, unsigned long config)
 {
-	unsigned long gmpp = readl(DOVE_MPP_GENERAL_VIRT_BASE);
-
-	gmpp &= ~DOVE_NAND_GPIO_EN;
-	if (config)
-		gmpp |= DOVE_NAND_GPIO_EN;
-
-	writel(gmpp, DOVE_MPP_GENERAL_VIRT_BASE);
-
+	regmap_update_bits(gconfmap, MPP_GENERAL_CONFIG,
+			   NAND_GPIO_EN,
+			   (config) ? NAND_GPIO_EN : 0);
 	return 0;
 }
 
 static int dove_audio0_ctrl_get(unsigned pid, unsigned long *config)
 {
-	unsigned long pmu = readl(DOVE_PMU_MPP_GENERAL_CTRL);
+	unsigned long pmu = readl(mpp_base + PMU_MPP_GENERAL_CTRL);
 
-	*config = ((pmu & DOVE_AU0_AC97_SEL) != 0);
+	*config = ((pmu & AU0_AC97_SEL) != 0);
 
 	return 0;
 }
 
 static int dove_audio0_ctrl_set(unsigned pid, unsigned long config)
 {
-	unsigned long pmu = readl(DOVE_PMU_MPP_GENERAL_CTRL);
+	unsigned long pmu = readl(mpp_base + PMU_MPP_GENERAL_CTRL);
 
-	pmu &= ~DOVE_AU0_AC97_SEL;
+	pmu &= ~AU0_AC97_SEL;
 	if (config)
-		pmu |= DOVE_AU0_AC97_SEL;
-	writel(pmu, DOVE_PMU_MPP_GENERAL_CTRL);
+		pmu |= AU0_AC97_SEL;
+	writel(pmu, mpp_base + PMU_MPP_GENERAL_CTRL);
 
 	return 0;
 }
 
 static int dove_audio1_ctrl_get(unsigned pid, unsigned long *config)
 {
-	unsigned long mpp4 = readl(DOVE_MPP_CTRL4_VIRT_BASE);
-	unsigned long sspc1 = readl(DOVE_SSP_CTRL_STATUS_1);
-	unsigned long gmpp = readl(DOVE_MPP_GENERAL_VIRT_BASE);
-	unsigned long gcfg2 = readl(DOVE_GLOBAL_CONFIG_2);
+	unsigned int mpp4 = readl(mpp4_base);
+	unsigned int sspc1;
+	unsigned int gmpp;
+	unsigned int gcfg2;
+
+	regmap_read(gconfmap, SSP_CTRL_STATUS_1, &sspc1);
+	regmap_read(gconfmap, MPP_GENERAL_CONFIG, &gmpp);
+	regmap_read(gconfmap, GLOBAL_CONFIG_2, &gcfg2);
 
 	*config = 0;
-	if (mpp4 & DOVE_AU1_GPIO_SEL)
+	if (mpp4 & AU1_GPIO_SEL)
 		*config |= BIT(3);
-	if (sspc1 & DOVE_SSP_ON_AU1)
+	if (sspc1 & SSP_ON_AU1)
 		*config |= BIT(2);
-	if (gmpp & DOVE_AU1_SPDIFO_GPIO_EN)
+	if (gmpp & AU1_SPDIFO_GPIO_EN)
 		*config |= BIT(1);
-	if (gcfg2 & DOVE_TWSI_OPTION3_GPIO)
+	if (gcfg2 & TWSI_OPTION3_GPIO)
 		*config |= BIT(0);
 
 	/* SSP/TWSI only if I2S1 not set*/
@@ -236,32 +249,22 @@ static int dove_audio1_ctrl_get(unsigned pid, unsigned long *config)
 
 static int dove_audio1_ctrl_set(unsigned pid, unsigned long config)
 {
-	unsigned long mpp4 = readl(DOVE_MPP_CTRL4_VIRT_BASE);
-	unsigned long sspc1 = readl(DOVE_SSP_CTRL_STATUS_1);
-	unsigned long gmpp = readl(DOVE_MPP_GENERAL_VIRT_BASE);
-	unsigned long gcfg2 = readl(DOVE_GLOBAL_CONFIG_2);
+	unsigned int mpp4 = readl(mpp4_base);
 
-	/*
-	 * clear all audio1 related bits before configure
-	 */
-	gcfg2 &= ~DOVE_TWSI_OPTION3_GPIO;
-	gmpp &= ~DOVE_AU1_SPDIFO_GPIO_EN;
-	sspc1 &= ~DOVE_SSP_ON_AU1;
-	mpp4 &= ~DOVE_AU1_GPIO_SEL;
-
-	if (config & BIT(0))
-		gcfg2 |= DOVE_TWSI_OPTION3_GPIO;
-	if (config & BIT(1))
-		gmpp |= DOVE_AU1_SPDIFO_GPIO_EN;
-	if (config & BIT(2))
-		sspc1 |= DOVE_SSP_ON_AU1;
+	mpp4 &= ~AU1_GPIO_SEL;
 	if (config & BIT(3))
-		mpp4 |= DOVE_AU1_GPIO_SEL;
-
-	writel(mpp4, DOVE_MPP_CTRL4_VIRT_BASE);
-	writel(sspc1, DOVE_SSP_CTRL_STATUS_1);
-	writel(gmpp, DOVE_MPP_GENERAL_VIRT_BASE);
-	writel(gcfg2, DOVE_GLOBAL_CONFIG_2);
+		mpp4 |= AU1_GPIO_SEL;
+	writel(mpp4, mpp4_base);
+
+	regmap_update_bits(gconfmap, SSP_CTRL_STATUS_1,
+			   SSP_ON_AU1,
+			   (config & BIT(2)) ? SSP_ON_AU1 : 0);
+	regmap_update_bits(gconfmap, MPP_GENERAL_CONFIG,
+			   AU1_SPDIFO_GPIO_EN,
+			   (config & BIT(1)) ? AU1_SPDIFO_GPIO_EN : 0);
+	regmap_update_bits(gconfmap, GLOBAL_CONFIG_2,
+			   TWSI_OPTION3_GPIO,
+			   (config & BIT(0)) ? TWSI_OPTION3_GPIO : 0);
 
 	return 0;
 }
@@ -307,15 +310,18 @@ static int dove_audio1_ctrl_gpio_dir(unsigned pid, bool input)
 
 static int dove_twsi_ctrl_get(unsigned pid, unsigned long *config)
 {
-	unsigned long gcfg1 = readl(DOVE_GLOBAL_CONFIG_1);
-	unsigned long gcfg2 = readl(DOVE_GLOBAL_CONFIG_2);
+	unsigned int gcfg1;
+	unsigned int gcfg2;
+
+	regmap_read(gconfmap, GLOBAL_CONFIG_1, &gcfg1);
+	regmap_read(gconfmap, GLOBAL_CONFIG_2, &gcfg2);
 
 	*config = 0;
-	if (gcfg1 & DOVE_TWSI_ENABLE_OPTION1)
+	if (gcfg1 & TWSI_ENABLE_OPTION1)
 		*config = 1;
-	else if (gcfg2 & DOVE_TWSI_ENABLE_OPTION2)
+	else if (gcfg2 & TWSI_ENABLE_OPTION2)
 		*config = 2;
-	else if (gcfg2 & DOVE_TWSI_ENABLE_OPTION3)
+	else if (gcfg2 & TWSI_ENABLE_OPTION3)
 		*config = 3;
 
 	return 0;
@@ -323,26 +329,27 @@ static int dove_twsi_ctrl_get(unsigned pid, unsigned long *config)
 
 static int dove_twsi_ctrl_set(unsigned pid, unsigned long config)
 {
-	unsigned long gcfg1 = readl(DOVE_GLOBAL_CONFIG_1);
-	unsigned long gcfg2 = readl(DOVE_GLOBAL_CONFIG_2);
-
-	gcfg1 &= ~DOVE_TWSI_ENABLE_OPTION1;
-	gcfg2 &= ~(DOVE_TWSI_ENABLE_OPTION2 | DOVE_TWSI_ENABLE_OPTION3);
+	unsigned int gcfg1 = 0;
+	unsigned int gcfg2 = 0;
 
 	switch (config) {
 	case 1:
-		gcfg1 |= DOVE_TWSI_ENABLE_OPTION1;
+		gcfg1 = TWSI_ENABLE_OPTION1;
 		break;
 	case 2:
-		gcfg2 |= DOVE_TWSI_ENABLE_OPTION2;
+		gcfg2 = TWSI_ENABLE_OPTION2;
 		break;
 	case 3:
-		gcfg2 |= DOVE_TWSI_ENABLE_OPTION3;
+		gcfg2 = TWSI_ENABLE_OPTION3;
 		break;
 	}
 
-	writel(gcfg1, DOVE_GLOBAL_CONFIG_1);
-	writel(gcfg2, DOVE_GLOBAL_CONFIG_2);
+	regmap_update_bits(gconfmap, GLOBAL_CONFIG_1,
+			   TWSI_ENABLE_OPTION1,
+			   gcfg1);
+	regmap_update_bits(gconfmap, GLOBAL_CONFIG_2,
+			   TWSI_ENABLE_OPTION2 | TWSI_ENABLE_OPTION3,
+			   gcfg2);
 
 	return 0;
 }
@@ -749,9 +756,17 @@ static struct of_device_id dove_pinctrl_of_match[] = {
 	{ }
 };
 
+static struct regmap_config gc_regmap_config = {
+	.reg_bits = 32,
+	.val_bits = 32,
+	.reg_stride = 4,
+	.max_register = 5,
+};
+
 static int dove_pinctrl_probe(struct platform_device *pdev)
 {
-	struct resource *res;
+	struct resource *res, *mpp_res;
+	struct resource fb_res;
 	const struct of_device_id *match =
 		of_match_device(dove_pinctrl_of_match, &pdev->dev);
 	pdev->dev.platform_data = (void *)match->data;
@@ -767,11 +782,58 @@ static int dove_pinctrl_probe(struct platform_device *pdev)
 	}
 	clk_prepare_enable(clk);
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	mpp_base = devm_ioremap_resource(&pdev->dev, res);
+	mpp_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	mpp_base = devm_ioremap_resource(&pdev->dev, mpp_res);
 	if (IS_ERR(mpp_base))
 		return PTR_ERR(mpp_base);
 
+	/* prepare fallback resource */
+	memcpy(&fb_res, mpp_res, sizeof(struct resource));
+	fb_res.start = 0;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	if (!res) {
+		dev_warn(&pdev->dev, "falling back to hardcoded MPP4 resource\n");
+		adjust_resource(&fb_res,
+			(mpp_res->start & INT_REGS_MASK) + MPP4_REGS_OFFS, 0x4);
+		res = &fb_res;
+	}
+
+	mpp4_base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(mpp4_base))
+		return PTR_ERR(mpp4_base);
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
+	if (!res) {
+		dev_warn(&pdev->dev, "falling back to hardcoded PMU resource\n");
+		adjust_resource(&fb_res,
+			(mpp_res->start & INT_REGS_MASK) + PMU_REGS_OFFS, 0x8);
+		res = &fb_res;
+	}
+
+	pmu_base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(pmu_base))
+		return PTR_ERR(pmu_base);
+
+	gconfmap = syscon_regmap_lookup_by_compatible("marvell,dove-global-config");
+	if (IS_ERR(gconfmap)) {
+		void __iomem *gc_base;
+
+		dev_warn(&pdev->dev, "falling back to hardcoded global registers\n");
+		adjust_resource(&fb_res,
+			(mpp_res->start & INT_REGS_MASK) + GC_REGS_OFFS, 0x14);
+		gc_base = devm_ioremap_resource(&pdev->dev, &fb_res);
+		if (IS_ERR(gc_base))
+			return PTR_ERR(gc_base);
+		gconfmap = devm_regmap_init_mmio(&pdev->dev,
+						 gc_base, &gc_regmap_config);
+		if (IS_ERR(gconfmap))
+			return PTR_ERR(gconfmap);
+	}
+
+	/* Warn on any missing DT resource */
+	WARN(fb_res.start, FW_BUG "Missing pinctrl regs in DTB. Please update your firmware.\n");
+
 	return mvebu_pinctrl_probe(pdev);
 }