1 files changed, 68 insertions, 250 deletions

diff --git a/drivers/cpuidle/cpuidle-qcom-spm.c b/drivers/cpuidle/cpuidle-qcom-spm.c
index c0e7971da2da..01e77913a414 100644
--- a/drivers/cpuidle/cpuidle-qcom-spm.c
+++ b/drivers/cpuidle/cpuidle-qcom-spm.c
@@ -18,158 +18,18 @@
 #include <linux/cpuidle.h>
 #include <linux/cpu_pm.h>
 #include <linux/qcom_scm.h>
+#include <soc/qcom/spm.h>
 
 #include <asm/proc-fns.h>
 #include <asm/suspend.h>
 
 #include "dt_idle_states.h"
 
-#define MAX_PMIC_DATA		2
-#define MAX_SEQ_DATA		64
-#define SPM_CTL_INDEX		0x7f
-#define SPM_CTL_INDEX_SHIFT	4
-#define SPM_CTL_EN		BIT(0)
-
-enum pm_sleep_mode {
-	PM_SLEEP_MODE_STBY,
-	PM_SLEEP_MODE_RET,
-	PM_SLEEP_MODE_SPC,
-	PM_SLEEP_MODE_PC,
-	PM_SLEEP_MODE_NR,
-};
-
-enum spm_reg {
-	SPM_REG_CFG,
-	SPM_REG_SPM_CTL,
-	SPM_REG_DLY,
-	SPM_REG_PMIC_DLY,
-	SPM_REG_PMIC_DATA_0,
-	SPM_REG_PMIC_DATA_1,
-	SPM_REG_VCTL,
-	SPM_REG_SEQ_ENTRY,
-	SPM_REG_SPM_STS,
-	SPM_REG_PMIC_STS,
-	SPM_REG_NR,
-};
-
-struct spm_reg_data {
-	const u8 *reg_offset;
-	u32 spm_cfg;
-	u32 spm_dly;
-	u32 pmic_dly;
-	u32 pmic_data[MAX_PMIC_DATA];
-	u8 seq[MAX_SEQ_DATA];
-	u8 start_index[PM_SLEEP_MODE_NR];
-};
-
-struct spm_driver_data {
+struct cpuidle_qcom_spm_data {
 	struct cpuidle_driver cpuidle_driver;
-	void __iomem *reg_base;
-	const struct spm_reg_data *reg_data;
-};
-
-static const u8 spm_reg_offset_v2_1[SPM_REG_NR] = {
-	[SPM_REG_CFG]		= 0x08,
-	[SPM_REG_SPM_CTL]	= 0x30,
-	[SPM_REG_DLY]		= 0x34,
-	[SPM_REG_SEQ_ENTRY]	= 0x80,
-};
-
-/* SPM register data for 8974, 8084 */
-static const struct spm_reg_data spm_reg_8974_8084_cpu  = {
-	.reg_offset = spm_reg_offset_v2_1,
-	.spm_cfg = 0x1,
-	.spm_dly = 0x3C102800,
-	.seq = { 0x03, 0x0B, 0x0F, 0x00, 0x20, 0x80, 0x10, 0xE8, 0x5B, 0x03,
-		0x3B, 0xE8, 0x5B, 0x82, 0x10, 0x0B, 0x30, 0x06, 0x26, 0x30,
-		0x0F },
-	.start_index[PM_SLEEP_MODE_STBY] = 0,
-	.start_index[PM_SLEEP_MODE_SPC] = 3,
+	struct spm_driver_data *spm;
 };
 
-/* SPM register data for 8226 */
-static const struct spm_reg_data spm_reg_8226_cpu  = {
-	.reg_offset = spm_reg_offset_v2_1,
-	.spm_cfg = 0x0,
-	.spm_dly = 0x3C102800,
-	.seq = { 0x60, 0x03, 0x60, 0x0B, 0x0F, 0x20, 0x10, 0x80, 0x30, 0x90,
-		0x5B, 0x60, 0x03, 0x60, 0x3B, 0x76, 0x76, 0x0B, 0x94, 0x5B,
-		0x80, 0x10, 0x26, 0x30, 0x0F },
-	.start_index[PM_SLEEP_MODE_STBY] = 0,
-	.start_index[PM_SLEEP_MODE_SPC] = 5,
-};
-
-static const u8 spm_reg_offset_v1_1[SPM_REG_NR] = {
-	[SPM_REG_CFG]		= 0x08,
-	[SPM_REG_SPM_CTL]	= 0x20,
-	[SPM_REG_PMIC_DLY]	= 0x24,
-	[SPM_REG_PMIC_DATA_0]	= 0x28,
-	[SPM_REG_PMIC_DATA_1]	= 0x2C,
-	[SPM_REG_SEQ_ENTRY]	= 0x80,
-};
-
-/* SPM register data for 8064 */
-static const struct spm_reg_data spm_reg_8064_cpu = {
-	.reg_offset = spm_reg_offset_v1_1,
-	.spm_cfg = 0x1F,
-	.pmic_dly = 0x02020004,
-	.pmic_data[0] = 0x0084009C,
-	.pmic_data[1] = 0x00A4001C,
-	.seq = { 0x03, 0x0F, 0x00, 0x24, 0x54, 0x10, 0x09, 0x03, 0x01,
-		0x10, 0x54, 0x30, 0x0C, 0x24, 0x30, 0x0F },
-	.start_index[PM_SLEEP_MODE_STBY] = 0,
-	.start_index[PM_SLEEP_MODE_SPC] = 2,
-};
-
-static inline void spm_register_write(struct spm_driver_data *drv,
-					enum spm_reg reg, u32 val)
-{
-	if (drv->reg_data->reg_offset[reg])
-		writel_relaxed(val, drv->reg_base +
-				drv->reg_data->reg_offset[reg]);
-}
-
-/* Ensure a guaranteed write, before return */
-static inline void spm_register_write_sync(struct spm_driver_data *drv,
-					enum spm_reg reg, u32 val)
-{
-	u32 ret;
-
-	if (!drv->reg_data->reg_offset[reg])
-		return;
-
-	do {
-		writel_relaxed(val, drv->reg_base +
-				drv->reg_data->reg_offset[reg]);
-		ret = readl_relaxed(drv->reg_base +
-				drv->reg_data->reg_offset[reg]);
-		if (ret == val)
-			break;
-		cpu_relax();
-	} while (1);
-}
-
-static inline u32 spm_register_read(struct spm_driver_data *drv,
-					enum spm_reg reg)
-{
-	return readl_relaxed(drv->reg_base + drv->reg_data->reg_offset[reg]);
-}
-
-static void spm_set_low_power_mode(struct spm_driver_data *drv,
-					enum pm_sleep_mode mode)
-{
-	u32 start_index;
-	u32 ctl_val;
-
-	start_index = drv->reg_data->start_index[mode];
-
-	ctl_val = spm_register_read(drv, SPM_REG_SPM_CTL);
-	ctl_val &= ~(SPM_CTL_INDEX << SPM_CTL_INDEX_SHIFT);
-	ctl_val |= start_index << SPM_CTL_INDEX_SHIFT;
-	ctl_val |= SPM_CTL_EN;
-	spm_register_write_sync(drv, SPM_REG_SPM_CTL, ctl_val);
-}
-
 static int qcom_pm_collapse(unsigned long int unused)
 {
 	qcom_scm_cpu_power_down(QCOM_SCM_CPU_PWR_DOWN_L2_ON);
@@ -201,10 +61,10 @@ static int qcom_cpu_spc(struct spm_driver_data *drv)
 static int spm_enter_idle_state(struct cpuidle_device *dev,
 				struct cpuidle_driver *drv, int idx)
 {
-	struct spm_driver_data *data = container_of(drv, struct spm_driver_data,
-						    cpuidle_driver);
+	struct cpuidle_qcom_spm_data *data = container_of(drv, struct cpuidle_qcom_spm_data,
+							  cpuidle_driver);
 
-	return CPU_PM_CPU_IDLE_ENTER_PARAM(qcom_cpu_spc, idx, data);
+	return CPU_PM_CPU_IDLE_ENTER_PARAM(qcom_cpu_spc, idx, data->spm);
 }
 
 static struct cpuidle_driver qcom_spm_idle_driver = {
@@ -225,134 +85,92 @@ static const struct of_device_id qcom_idle_state_match[] = {
 	{ },
 };
 
-static int spm_cpuidle_init(struct cpuidle_driver *drv, int cpu)
+static int spm_cpuidle_register(struct device *cpuidle_dev, int cpu)
 {
+	struct platform_device *pdev = NULL;
+	struct device_node *cpu_node, *saw_node;
+	struct cpuidle_qcom_spm_data *data = NULL;
 	int ret;
 
-	memcpy(drv, &qcom_spm_idle_driver, sizeof(*drv));
-	drv->cpumask = (struct cpumask *)cpumask_of(cpu);
+	cpu_node = of_cpu_device_node_get(cpu);
+	if (!cpu_node)
+		return -ENODEV;
 
-	/* Parse idle states from device tree */
-	ret = dt_init_idle_driver(drv, qcom_idle_state_match, 1);
-	if (ret <= 0)
-		return ret ? : -ENODEV;
+	saw_node = of_parse_phandle(cpu_node, "qcom,saw", 0);
+	if (!saw_node)
+		return -ENODEV;
 
-	/* We have atleast one power down mode */
-	return qcom_scm_set_warm_boot_addr(cpu_resume_arm, drv->cpumask);
-}
+	pdev = of_find_device_by_node(saw_node);
+	of_node_put(saw_node);
+	of_node_put(cpu_node);
+	if (!pdev)
+		return -ENODEV;
 
-static struct spm_driver_data *spm_get_drv(struct platform_device *pdev,
-		int *spm_cpu)
-{
-	struct spm_driver_data *drv = NULL;
-	struct device_node *cpu_node, *saw_node;
-	int cpu;
-	bool found = 0;
+	data = devm_kzalloc(cpuidle_dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
 
-	for_each_possible_cpu(cpu) {
-		cpu_node = of_cpu_device_node_get(cpu);
-		if (!cpu_node)
-			continue;
-		saw_node = of_parse_phandle(cpu_node, "qcom,saw", 0);
-		found = (saw_node == pdev->dev.of_node);
-		of_node_put(saw_node);
-		of_node_put(cpu_node);
-		if (found)
-			break;
-	}
+	data->spm = dev_get_drvdata(&pdev->dev);
+	if (!data->spm)
+		return -EINVAL;
 
-	if (found) {
-		drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
-		if (drv)
-			*spm_cpu = cpu;
-	}
+	data->cpuidle_driver = qcom_spm_idle_driver;
+	data->cpuidle_driver.cpumask = (struct cpumask *)cpumask_of(cpu);
 
-	return drv;
-}
+	ret = dt_init_idle_driver(&data->cpuidle_driver,
+				  qcom_idle_state_match, 1);
+	if (ret <= 0)
+		return ret ? : -ENODEV;
 
-static const struct of_device_id spm_match_table[] = {
-	{ .compatible = "qcom,msm8226-saw2-v2.1-cpu",
-	  .data = &spm_reg_8226_cpu },
-	{ .compatible = "qcom,msm8974-saw2-v2.1-cpu",
-	  .data = &spm_reg_8974_8084_cpu },
-	{ .compatible = "qcom,apq8084-saw2-v2.1-cpu",
-	  .data = &spm_reg_8974_8084_cpu },
-	{ .compatible = "qcom,apq8064-saw2-v1.1-cpu",
-	  .data = &spm_reg_8064_cpu },
-	{ },
-};
+	ret = qcom_scm_set_warm_boot_addr(cpu_resume_arm, cpumask_of(cpu));
+	if (ret)
+		return ret;
+
+	return cpuidle_register(&data->cpuidle_driver, NULL);
+}
 
-static int spm_dev_probe(struct platform_device *pdev)
+static int spm_cpuidle_drv_probe(struct platform_device *pdev)
 {
-	struct spm_driver_data *drv;
-	struct resource *res;
-	const struct of_device_id *match_id;
-	void __iomem *addr;
 	int cpu, ret;
 
 	if (!qcom_scm_is_available())
 		return -EPROBE_DEFER;
 
-	drv = spm_get_drv(pdev, &cpu);
-	if (!drv)
-		return -EINVAL;
-	platform_set_drvdata(pdev, drv);
+	for_each_possible_cpu(cpu) {
+		ret = spm_cpuidle_register(&pdev->dev, cpu);
+		if (ret && ret != -ENODEV) {
+			dev_err(&pdev->dev,
+				"Cannot register for CPU%d: %d\n", cpu, ret);
+		}
+	}
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	drv->reg_base = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(drv->reg_base))
-		return PTR_ERR(drv->reg_base);
+	return 0;
+}
 
-	match_id = of_match_node(spm_match_table, pdev->dev.of_node);
-	if (!match_id)
-		return -ENODEV;
+static struct platform_driver spm_cpuidle_driver = {
+	.probe = spm_cpuidle_drv_probe,
+	.driver = {
+		.name = "qcom-spm-cpuidle",
+		.suppress_bind_attrs = true,
+	},
+};
 
-	drv->reg_data = match_id->data;
+static int __init qcom_spm_cpuidle_init(void)
+{
+	struct platform_device *pdev;
+	int ret;
 
-	ret = spm_cpuidle_init(&drv->cpuidle_driver, cpu);
+	ret = platform_driver_register(&spm_cpuidle_driver);
 	if (ret)
 		return ret;
 
-	/* Write the SPM sequences first.. */
-	addr = drv->reg_base + drv->reg_data->reg_offset[SPM_REG_SEQ_ENTRY];
-	__iowrite32_copy(addr, drv->reg_data->seq,
-			ARRAY_SIZE(drv->reg_data->seq) / 4);
-
-	/*
-	 * ..and then the control registers.
-	 * On some SoC if the control registers are written first and if the
-	 * CPU was held in reset, the reset signal could trigger the SPM state
-	 * machine, before the sequences are completely written.
-	 */
-	spm_register_write(drv, SPM_REG_CFG, drv->reg_data->spm_cfg);
-	spm_register_write(drv, SPM_REG_DLY, drv->reg_data->spm_dly);
-	spm_register_write(drv, SPM_REG_PMIC_DLY, drv->reg_data->pmic_dly);
-	spm_register_write(drv, SPM_REG_PMIC_DATA_0,
-				drv->reg_data->pmic_data[0]);
-	spm_register_write(drv, SPM_REG_PMIC_DATA_1,
-				drv->reg_data->pmic_data[1]);
-
-	/* Set up Standby as the default low power mode */
-	spm_set_low_power_mode(drv, PM_SLEEP_MODE_STBY);
-
-	return cpuidle_register(&drv->cpuidle_driver, NULL);
-}
-
-static int spm_dev_remove(struct platform_device *pdev)
-{
-	struct spm_driver_data *drv = platform_get_drvdata(pdev);
+	pdev = platform_device_register_simple("qcom-spm-cpuidle",
+					       -1, NULL, 0);
+	if (IS_ERR(pdev)) {
+		platform_driver_unregister(&spm_cpuidle_driver);
+		return PTR_ERR(pdev);
+	}
 
-	cpuidle_unregister(&drv->cpuidle_driver);
 	return 0;
 }
-
-static struct platform_driver spm_driver = {
-	.probe = spm_dev_probe,
-	.remove = spm_dev_remove,
-	.driver = {
-		.name = "saw",
-		.of_match_table = spm_match_table,
-	},
-};
-
-builtin_platform_driver(spm_driver);
+device_initcall(qcom_spm_cpuidle_init);