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-rw-r--r--arch/arm/mach-omap2/smartreflex.c1165
1 files changed, 0 insertions, 1165 deletions
diff --git a/arch/arm/mach-omap2/smartreflex.c b/arch/arm/mach-omap2/smartreflex.c
deleted file mode 100644
index 008fbd7..0000000
--- a/arch/arm/mach-omap2/smartreflex.c
+++ /dev/null
@@ -1,1165 +0,0 @@
-/*
- * OMAP SmartReflex Voltage Control
- *
- * Author: Thara Gopinath <thara@ti.com>
- *
- * Copyright (C) 2010 Texas Instruments, Inc.
- * Thara Gopinath <thara@ti.com>
- *
- * Copyright (C) 2008 Nokia Corporation
- * Kalle Jokiniemi
- *
- * Copyright (C) 2007 Texas Instruments, Inc.
- * Lesly A M <x0080970@ti.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/module.h>
-#include <linux/interrupt.h>
-#include <linux/clk.h>
-#include <linux/io.h>
-#include <linux/debugfs.h>
-#include <linux/delay.h>
-#include <linux/slab.h>
-#include <linux/pm_runtime.h>
-
-#include "common.h"
-
-#include "pm.h"
-#include "smartreflex.h"
-
-#define SMARTREFLEX_NAME_LEN 16
-#define NVALUE_NAME_LEN 40
-#define SR_DISABLE_TIMEOUT 200
-
-struct omap_sr {
- struct list_head node;
- struct platform_device *pdev;
- struct omap_sr_nvalue_table *nvalue_table;
- struct voltagedomain *voltdm;
- struct dentry *dbg_dir;
- unsigned int irq;
- int srid;
- int ip_type;
- int nvalue_count;
- bool autocomp_active;
- u32 clk_length;
- u32 err_weight;
- u32 err_minlimit;
- u32 err_maxlimit;
- u32 accum_data;
- u32 senn_avgweight;
- u32 senp_avgweight;
- u32 senp_mod;
- u32 senn_mod;
- void __iomem *base;
-};
-
-/* sr_list contains all the instances of smartreflex module */
-static LIST_HEAD(sr_list);
-
-static struct omap_sr_class_data *sr_class;
-static struct omap_sr_pmic_data *sr_pmic_data;
-static struct dentry *sr_dbg_dir;
-
-static inline void sr_write_reg(struct omap_sr *sr, unsigned offset, u32 value)
-{
- __raw_writel(value, (sr->base + offset));
-}
-
-static inline void sr_modify_reg(struct omap_sr *sr, unsigned offset, u32 mask,
- u32 value)
-{
- u32 reg_val;
-
- /*
- * Smartreflex error config register is special as it contains
- * certain status bits which if written a 1 into means a clear
- * of those bits. So in order to make sure no accidental write of
- * 1 happens to those status bits, do a clear of them in the read
- * value. This mean this API doesn't rewrite values in these bits
- * if they are currently set, but does allow the caller to write
- * those bits.
- */
- if (sr->ip_type == SR_TYPE_V1 && offset == ERRCONFIG_V1)
- mask |= ERRCONFIG_STATUS_V1_MASK;
- else if (sr->ip_type == SR_TYPE_V2 && offset == ERRCONFIG_V2)
- mask |= ERRCONFIG_VPBOUNDINTST_V2;
-
- reg_val = __raw_readl(sr->base + offset);
- reg_val &= ~mask;
-
- value &= mask;
-
- reg_val |= value;
-
- __raw_writel(reg_val, (sr->base + offset));
-}
-
-static inline u32 sr_read_reg(struct omap_sr *sr, unsigned offset)
-{
- return __raw_readl(sr->base + offset);
-}
-
-static struct omap_sr *_sr_lookup(struct voltagedomain *voltdm)
-{
- struct omap_sr *sr_info;
-
- if (!voltdm) {
- pr_err("%s: Null voltage domain passed!\n", __func__);
- return ERR_PTR(-EINVAL);
- }
-
- list_for_each_entry(sr_info, &sr_list, node) {
- if (voltdm == sr_info->voltdm)
- return sr_info;
- }
-
- return ERR_PTR(-ENODATA);
-}
-
-static irqreturn_t sr_interrupt(int irq, void *data)
-{
- struct omap_sr *sr_info = data;
- u32 status = 0;
-
- switch (sr_info->ip_type) {
- case SR_TYPE_V1:
- /* Read the status bits */
- status = sr_read_reg(sr_info, ERRCONFIG_V1);
-
- /* Clear them by writing back */
- sr_write_reg(sr_info, ERRCONFIG_V1, status);
- break;
- case SR_TYPE_V2:
- /* Read the status bits */
- status = sr_read_reg(sr_info, IRQSTATUS);
-
- /* Clear them by writing back */
- sr_write_reg(sr_info, IRQSTATUS, status);
- break;
- default:
- dev_err(&sr_info->pdev->dev, "UNKNOWN IP type %d\n",
- sr_info->ip_type);
- return IRQ_NONE;
- }
-
- if (sr_class->notify)
- sr_class->notify(sr_info->voltdm, status);
-
- return IRQ_HANDLED;
-}
-
-static void sr_set_clk_length(struct omap_sr *sr)
-{
- struct clk *sys_ck;
- u32 sys_clk_speed;
-
- if (cpu_is_omap34xx())
- sys_ck = clk_get(NULL, "sys_ck");
- else
- sys_ck = clk_get(NULL, "sys_clkin_ck");
-
- if (IS_ERR(sys_ck)) {
- dev_err(&sr->pdev->dev, "%s: unable to get sys clk\n",
- __func__);
- return;
- }
-
- sys_clk_speed = clk_get_rate(sys_ck);
- clk_put(sys_ck);
-
- switch (sys_clk_speed) {
- case 12000000:
- sr->clk_length = SRCLKLENGTH_12MHZ_SYSCLK;
- break;
- case 13000000:
- sr->clk_length = SRCLKLENGTH_13MHZ_SYSCLK;
- break;
- case 19200000:
- sr->clk_length = SRCLKLENGTH_19MHZ_SYSCLK;
- break;
- case 26000000:
- sr->clk_length = SRCLKLENGTH_26MHZ_SYSCLK;
- break;
- case 38400000:
- sr->clk_length = SRCLKLENGTH_38MHZ_SYSCLK;
- break;
- default:
- dev_err(&sr->pdev->dev, "%s: Invalid sysclk value: %d\n",
- __func__, sys_clk_speed);
- break;
- }
-}
-
-static void sr_set_regfields(struct omap_sr *sr)
-{
- /*
- * For time being these values are defined in smartreflex.h
- * and populated during init. May be they can be moved to board
- * file or pmic specific data structure. In that case these structure
- * fields will have to be populated using the pdata or pmic structure.
- */
- if (cpu_is_omap34xx() || cpu_is_omap44xx()) {
- sr->err_weight = OMAP3430_SR_ERRWEIGHT;
- sr->err_maxlimit = OMAP3430_SR_ERRMAXLIMIT;
- sr->accum_data = OMAP3430_SR_ACCUMDATA;
- if (!(strcmp(sr->voltdm->name, "mpu"))) {
- sr->senn_avgweight = OMAP3430_SR1_SENNAVGWEIGHT;
- sr->senp_avgweight = OMAP3430_SR1_SENPAVGWEIGHT;
- } else {
- sr->senn_avgweight = OMAP3430_SR2_SENNAVGWEIGHT;
- sr->senp_avgweight = OMAP3430_SR2_SENPAVGWEIGHT;
- }
- }
-}
-
-static void sr_start_vddautocomp(struct omap_sr *sr)
-{
- if (!sr_class || !(sr_class->enable) || !(sr_class->configure)) {
- dev_warn(&sr->pdev->dev,
- "%s: smartreflex class driver not registered\n",
- __func__);
- return;
- }
-
- if (!sr_class->enable(sr->voltdm))
- sr->autocomp_active = true;
-}
-
-static void sr_stop_vddautocomp(struct omap_sr *sr)
-{
- if (!sr_class || !(sr_class->disable)) {
- dev_warn(&sr->pdev->dev,
- "%s: smartreflex class driver not registered\n",
- __func__);
- return;
- }
-
- if (sr->autocomp_active) {
- sr_class->disable(sr->voltdm, 1);
- sr->autocomp_active = false;
- }
-}
-
-/*
- * This function handles the intializations which have to be done
- * only when both sr device and class driver regiter has
- * completed. This will be attempted to be called from both sr class
- * driver register and sr device intializtion API's. Only one call
- * will ultimately succeed.
- *
- * Currently this function registers interrupt handler for a particular SR
- * if smartreflex class driver is already registered and has
- * requested for interrupts and the SR interrupt line in present.
- */
-static int sr_late_init(struct omap_sr *sr_info)
-{
- char *name;
- struct omap_sr_data *pdata = sr_info->pdev->dev.platform_data;
- struct resource *mem;
- int ret = 0;
-
- if (sr_class->notify && sr_class->notify_flags && sr_info->irq) {
- name = kasprintf(GFP_KERNEL, "sr_%s", sr_info->voltdm->name);
- if (name == NULL) {
- ret = -ENOMEM;
- goto error;
- }
- ret = request_irq(sr_info->irq, sr_interrupt,
- 0, name, sr_info);
- if (ret)
- goto error;
- disable_irq(sr_info->irq);
- }
-
- if (pdata && pdata->enable_on_init)
- sr_start_vddautocomp(sr_info);
-
- return ret;
-
-error:
- iounmap(sr_info->base);
- mem = platform_get_resource(sr_info->pdev, IORESOURCE_MEM, 0);
- release_mem_region(mem->start, resource_size(mem));
- list_del(&sr_info->node);
- dev_err(&sr_info->pdev->dev, "%s: ERROR in registering"
- "interrupt handler. Smartreflex will"
- "not function as desired\n", __func__);
- kfree(name);
- kfree(sr_info);
-
- return ret;
-}
-
-static void sr_v1_disable(struct omap_sr *sr)
-{
- int timeout = 0;
- int errconf_val = ERRCONFIG_MCUACCUMINTST | ERRCONFIG_MCUVALIDINTST |
- ERRCONFIG_MCUBOUNDINTST;
-
- /* Enable MCUDisableAcknowledge interrupt */
- sr_modify_reg(sr, ERRCONFIG_V1,
- ERRCONFIG_MCUDISACKINTEN, ERRCONFIG_MCUDISACKINTEN);
-
- /* SRCONFIG - disable SR */
- sr_modify_reg(sr, SRCONFIG, SRCONFIG_SRENABLE, 0x0);
-
- /* Disable all other SR interrupts and clear the status as needed */
- if (sr_read_reg(sr, ERRCONFIG_V1) & ERRCONFIG_VPBOUNDINTST_V1)
- errconf_val |= ERRCONFIG_VPBOUNDINTST_V1;
- sr_modify_reg(sr, ERRCONFIG_V1,
- (ERRCONFIG_MCUACCUMINTEN | ERRCONFIG_MCUVALIDINTEN |
- ERRCONFIG_MCUBOUNDINTEN | ERRCONFIG_VPBOUNDINTEN_V1),
- errconf_val);
-
- /*
- * Wait for SR to be disabled.
- * wait until ERRCONFIG.MCUDISACKINTST = 1. Typical latency is 1us.
- */
- omap_test_timeout((sr_read_reg(sr, ERRCONFIG_V1) &
- ERRCONFIG_MCUDISACKINTST), SR_DISABLE_TIMEOUT,
- timeout);
-
- if (timeout >= SR_DISABLE_TIMEOUT)
- dev_warn(&sr->pdev->dev, "%s: Smartreflex disable timedout\n",
- __func__);
-
- /* Disable MCUDisableAcknowledge interrupt & clear pending interrupt */
- sr_modify_reg(sr, ERRCONFIG_V1, ERRCONFIG_MCUDISACKINTEN,
- ERRCONFIG_MCUDISACKINTST);
-}
-
-static void sr_v2_disable(struct omap_sr *sr)
-{
- int timeout = 0;
-
- /* Enable MCUDisableAcknowledge interrupt */
- sr_write_reg(sr, IRQENABLE_SET, IRQENABLE_MCUDISABLEACKINT);
-
- /* SRCONFIG - disable SR */
- sr_modify_reg(sr, SRCONFIG, SRCONFIG_SRENABLE, 0x0);
-
- /*
- * Disable all other SR interrupts and clear the status
- * write to status register ONLY on need basis - only if status
- * is set.
- */
- if (sr_read_reg(sr, ERRCONFIG_V2) & ERRCONFIG_VPBOUNDINTST_V2)
- sr_modify_reg(sr, ERRCONFIG_V2, ERRCONFIG_VPBOUNDINTEN_V2,
- ERRCONFIG_VPBOUNDINTST_V2);
- else
- sr_modify_reg(sr, ERRCONFIG_V2, ERRCONFIG_VPBOUNDINTEN_V2,
- 0x0);
- sr_write_reg(sr, IRQENABLE_CLR, (IRQENABLE_MCUACCUMINT |
- IRQENABLE_MCUVALIDINT |
- IRQENABLE_MCUBOUNDSINT));
- sr_write_reg(sr, IRQSTATUS, (IRQSTATUS_MCUACCUMINT |
- IRQSTATUS_MCVALIDINT |
- IRQSTATUS_MCBOUNDSINT));
-
- /*
- * Wait for SR to be disabled.
- * wait until IRQSTATUS.MCUDISACKINTST = 1. Typical latency is 1us.
- */
- omap_test_timeout((sr_read_reg(sr, IRQSTATUS) &
- IRQSTATUS_MCUDISABLEACKINT), SR_DISABLE_TIMEOUT,
- timeout);
-
- if (timeout >= SR_DISABLE_TIMEOUT)
- dev_warn(&sr->pdev->dev, "%s: Smartreflex disable timedout\n",
- __func__);
-
- /* Disable MCUDisableAcknowledge interrupt & clear pending interrupt */
- sr_write_reg(sr, IRQENABLE_CLR, IRQENABLE_MCUDISABLEACKINT);
- sr_write_reg(sr, IRQSTATUS, IRQSTATUS_MCUDISABLEACKINT);
-}
-
-static u32 sr_retrieve_nvalue(struct omap_sr *sr, u32 efuse_offs)
-{
- int i;
-
- if (!sr->nvalue_table) {
- dev_warn(&sr->pdev->dev, "%s: Missing ntarget value table\n",
- __func__);
- return 0;
- }
-
- for (i = 0; i < sr->nvalue_count; i++) {
- if (sr->nvalue_table[i].efuse_offs == efuse_offs)
- return sr->nvalue_table[i].nvalue;
- }
-
- return 0;
-}
-
-/* Public Functions */
-
-/**
- * sr_configure_errgen() - Configures the smrtreflex to perform AVS using the
- * error generator module.
- * @voltdm: VDD pointer to which the SR module to be configured belongs to.
- *
- * This API is to be called from the smartreflex class driver to
- * configure the error generator module inside the smartreflex module.
- * SR settings if using the ERROR module inside Smartreflex.
- * SR CLASS 3 by default uses only the ERROR module where as
- * SR CLASS 2 can choose between ERROR module and MINMAXAVG
- * module. Returns 0 on success and error value in case of failure.
- */
-int sr_configure_errgen(struct voltagedomain *voltdm)
-{
- u32 sr_config, sr_errconfig, errconfig_offs;
- u32 vpboundint_en, vpboundint_st;
- u32 senp_en = 0, senn_en = 0;
- u8 senp_shift, senn_shift;
- struct omap_sr *sr = _sr_lookup(voltdm);
-
- if (IS_ERR(sr)) {
- pr_warning("%s: omap_sr struct for sr_%s not found\n",
- __func__, voltdm->name);
- return PTR_ERR(sr);
- }
-
- if (!sr->clk_length)
- sr_set_clk_length(sr);
-
- senp_en = sr->senp_mod;
- senn_en = sr->senn_mod;
-
- sr_config = (sr->clk_length << SRCONFIG_SRCLKLENGTH_SHIFT) |
- SRCONFIG_SENENABLE | SRCONFIG_ERRGEN_EN;
-
- switch (sr->ip_type) {
- case SR_TYPE_V1:
- sr_config |= SRCONFIG_DELAYCTRL;
- senn_shift = SRCONFIG_SENNENABLE_V1_SHIFT;
- senp_shift = SRCONFIG_SENPENABLE_V1_SHIFT;
- errconfig_offs = ERRCONFIG_V1;
- vpboundint_en = ERRCONFIG_VPBOUNDINTEN_V1;
- vpboundint_st = ERRCONFIG_VPBOUNDINTST_V1;
- break;
- case SR_TYPE_V2:
- senn_shift = SRCONFIG_SENNENABLE_V2_SHIFT;
- senp_shift = SRCONFIG_SENPENABLE_V2_SHIFT;
- errconfig_offs = ERRCONFIG_V2;
- vpboundint_en = ERRCONFIG_VPBOUNDINTEN_V2;
- vpboundint_st = ERRCONFIG_VPBOUNDINTST_V2;
- break;
- default:
- dev_err(&sr->pdev->dev, "%s: Trying to Configure smartreflex"
- "module without specifying the ip\n", __func__);
- return -EINVAL;
- }
-
- sr_config |= ((senn_en << senn_shift) | (senp_en << senp_shift));
- sr_write_reg(sr, SRCONFIG, sr_config);
- sr_errconfig = (sr->err_weight << ERRCONFIG_ERRWEIGHT_SHIFT) |
- (sr->err_maxlimit << ERRCONFIG_ERRMAXLIMIT_SHIFT) |
- (sr->err_minlimit << ERRCONFIG_ERRMINLIMIT_SHIFT);
- sr_modify_reg(sr, errconfig_offs, (SR_ERRWEIGHT_MASK |
- SR_ERRMAXLIMIT_MASK | SR_ERRMINLIMIT_MASK),
- sr_errconfig);
-
- /* Enabling the interrupts if the ERROR module is used */
- sr_modify_reg(sr, errconfig_offs, (vpboundint_en | vpboundint_st),
- vpboundint_en);
-
- return 0;
-}
-
-/**
- * sr_disable_errgen() - Disables SmartReflex AVS module's errgen component
- * @voltdm: VDD pointer to which the SR module to be configured belongs to.
- *
- * This API is to be called from the smartreflex class driver to
- * disable the error generator module inside the smartreflex module.
- *
- * Returns 0 on success and error value in case of failure.
- */
-int sr_disable_errgen(struct voltagedomain *voltdm)
-{
- u32 errconfig_offs;
- u32 vpboundint_en, vpboundint_st;
- struct omap_sr *sr = _sr_lookup(voltdm);
-
- if (IS_ERR(sr)) {
- pr_warning("%s: omap_sr struct for sr_%s not found\n",
- __func__, voltdm->name);
- return PTR_ERR(sr);
- }
-
- switch (sr->ip_type) {
- case SR_TYPE_V1:
- errconfig_offs = ERRCONFIG_V1;
- vpboundint_en = ERRCONFIG_VPBOUNDINTEN_V1;
- vpboundint_st = ERRCONFIG_VPBOUNDINTST_V1;
- break;
- case SR_TYPE_V2:
- errconfig_offs = ERRCONFIG_V2;
- vpboundint_en = ERRCONFIG_VPBOUNDINTEN_V2;
- vpboundint_st = ERRCONFIG_VPBOUNDINTST_V2;
- break;
- default:
- dev_err(&sr->pdev->dev, "%s: Trying to Configure smartreflex"
- "module without specifying the ip\n", __func__);
- return -EINVAL;
- }
-
- /* Disable the interrupts of ERROR module */
- sr_modify_reg(sr, errconfig_offs, vpboundint_en | vpboundint_st, 0);
-
- /* Disable the Sensor and errorgen */
- sr_modify_reg(sr, SRCONFIG, SRCONFIG_SENENABLE | SRCONFIG_ERRGEN_EN, 0);
-
- return 0;
-}
-
-/**
- * sr_configure_minmax() - Configures the smrtreflex to perform AVS using the
- * minmaxavg module.
- * @voltdm: VDD pointer to which the SR module to be configured belongs to.
- *
- * This API is to be called from the smartreflex class driver to
- * configure the minmaxavg module inside the smartreflex module.
- * SR settings if using the ERROR module inside Smartreflex.
- * SR CLASS 3 by default uses only the ERROR module where as
- * SR CLASS 2 can choose between ERROR module and MINMAXAVG
- * module. Returns 0 on success and error value in case of failure.
- */
-int sr_configure_minmax(struct voltagedomain *voltdm)
-{
- u32 sr_config, sr_avgwt;
- u32 senp_en = 0, senn_en = 0;
- u8 senp_shift, senn_shift;
- struct omap_sr *sr = _sr_lookup(voltdm);
-
- if (IS_ERR(sr)) {
- pr_warning("%s: omap_sr struct for sr_%s not found\n",
- __func__, voltdm->name);
- return PTR_ERR(sr);
- }
-
- if (!sr->clk_length)
- sr_set_clk_length(sr);
-
- senp_en = sr->senp_mod;
- senn_en = sr->senn_mod;
-
- sr_config = (sr->clk_length << SRCONFIG_SRCLKLENGTH_SHIFT) |
- SRCONFIG_SENENABLE |
- (sr->accum_data << SRCONFIG_ACCUMDATA_SHIFT);
-
- switch (sr->ip_type) {
- case SR_TYPE_V1:
- sr_config |= SRCONFIG_DELAYCTRL;
- senn_shift = SRCONFIG_SENNENABLE_V1_SHIFT;
- senp_shift = SRCONFIG_SENPENABLE_V1_SHIFT;
- break;
- case SR_TYPE_V2:
- senn_shift = SRCONFIG_SENNENABLE_V2_SHIFT;
- senp_shift = SRCONFIG_SENPENABLE_V2_SHIFT;
- break;
- default:
- dev_err(&sr->pdev->dev, "%s: Trying to Configure smartreflex"
- "module without specifying the ip\n", __func__);
- return -EINVAL;
- }
-
- sr_config |= ((senn_en << senn_shift) | (senp_en << senp_shift));
- sr_write_reg(sr, SRCONFIG, sr_config);
- sr_avgwt = (sr->senp_avgweight << AVGWEIGHT_SENPAVGWEIGHT_SHIFT) |
- (sr->senn_avgweight << AVGWEIGHT_SENNAVGWEIGHT_SHIFT);
- sr_write_reg(sr, AVGWEIGHT, sr_avgwt);
-
- /*
- * Enabling the interrupts if MINMAXAVG module is used.
- * TODO: check if all the interrupts are mandatory
- */
- switch (sr->ip_type) {
- case SR_TYPE_V1:
- sr_modify_reg(sr, ERRCONFIG_V1,
- (ERRCONFIG_MCUACCUMINTEN | ERRCONFIG_MCUVALIDINTEN |
- ERRCONFIG_MCUBOUNDINTEN),
- (ERRCONFIG_MCUACCUMINTEN | ERRCONFIG_MCUACCUMINTST |
- ERRCONFIG_MCUVALIDINTEN | ERRCONFIG_MCUVALIDINTST |
- ERRCONFIG_MCUBOUNDINTEN | ERRCONFIG_MCUBOUNDINTST));
- break;
- case SR_TYPE_V2:
- sr_write_reg(sr, IRQSTATUS,
- IRQSTATUS_MCUACCUMINT | IRQSTATUS_MCVALIDINT |
- IRQSTATUS_MCBOUNDSINT | IRQSTATUS_MCUDISABLEACKINT);
- sr_write_reg(sr, IRQENABLE_SET,
- IRQENABLE_MCUACCUMINT | IRQENABLE_MCUVALIDINT |
- IRQENABLE_MCUBOUNDSINT | IRQENABLE_MCUDISABLEACKINT);
- break;
- default:
- dev_err(&sr->pdev->dev, "%s: Trying to Configure smartreflex"
- "module without specifying the ip\n", __func__);
- return -EINVAL;
- }
-
- return 0;
-}
-
-/**
- * sr_enable() - Enables the smartreflex module.
- * @voltdm: VDD pointer to which the SR module to be configured belongs to.
- * @volt: The voltage at which the Voltage domain associated with
- * the smartreflex module is operating at.
- * This is required only to program the correct Ntarget value.
- *
- * This API is to be called from the smartreflex class driver to
- * enable a smartreflex module. Returns 0 on success. Returns error
- * value if the voltage passed is wrong or if ntarget value is wrong.
- */
-int sr_enable(struct voltagedomain *voltdm, unsigned long volt)
-{
- struct omap_volt_data *volt_data;
- struct omap_sr *sr = _sr_lookup(voltdm);
- u32 nvalue_reciprocal;
- int ret;
-
- if (IS_ERR(sr)) {
- pr_warning("%s: omap_sr struct for sr_%s not found\n",
- __func__, voltdm->name);
- return PTR_ERR(sr);
- }
-
- volt_data = omap_voltage_get_voltdata(sr->voltdm, volt);
-
- if (IS_ERR(volt_data)) {
- dev_warn(&sr->pdev->dev, "%s: Unable to get voltage table"
- "for nominal voltage %ld\n", __func__, volt);
- return PTR_ERR(volt_data);
- }
-
- nvalue_reciprocal = sr_retrieve_nvalue(sr, volt_data->sr_efuse_offs);
-
- if (!nvalue_reciprocal) {
- dev_warn(&sr->pdev->dev, "%s: NVALUE = 0 at voltage %ld\n",
- __func__, volt);
- return -ENODATA;
- }
-
- /* errminlimit is opp dependent and hence linked to voltage */
- sr->err_minlimit = volt_data->sr_errminlimit;
-
- pm_runtime_get_sync(&sr->pdev->dev);
-
- /* Check if SR is already enabled. If yes do nothing */
- if (sr_read_reg(sr, SRCONFIG) & SRCONFIG_SRENABLE)
- return 0;
-
- /* Configure SR */
- ret = sr_class->configure(voltdm);
- if (ret)
- return ret;
-
- sr_write_reg(sr, NVALUERECIPROCAL, nvalue_reciprocal);
-
- /* SRCONFIG - enable SR */
- sr_modify_reg(sr, SRCONFIG, SRCONFIG_SRENABLE, SRCONFIG_SRENABLE);
- return 0;
-}
-
-/**
- * sr_disable() - Disables the smartreflex module.
- * @voltdm: VDD pointer to which the SR module to be configured belongs to.
- *
- * This API is to be called from the smartreflex class driver to
- * disable a smartreflex module.
- */
-void sr_disable(struct voltagedomain *voltdm)
-{
- struct omap_sr *sr = _sr_lookup(voltdm);
-
- if (IS_ERR(sr)) {
- pr_warning("%s: omap_sr struct for sr_%s not found\n",
- __func__, voltdm->name);
- return;
- }
-
- /* Check if SR clocks are already disabled. If yes do nothing */
- if (pm_runtime_suspended(&sr->pdev->dev))
- return;
-
- /*
- * Disable SR if only it is indeed enabled. Else just
- * disable the clocks.
- */
- if (sr_read_reg(sr, SRCONFIG) & SRCONFIG_SRENABLE) {
- switch (sr->ip_type) {
- case SR_TYPE_V1:
- sr_v1_disable(sr);
- break;
- case SR_TYPE_V2:
- sr_v2_disable(sr);
- break;
- default:
- dev_err(&sr->pdev->dev, "UNKNOWN IP type %d\n",
- sr->ip_type);
- }
- }
-
- pm_runtime_put_sync_suspend(&sr->pdev->dev);
-}
-
-/**
- * sr_register_class() - API to register a smartreflex class parameters.
- * @class_data: The structure containing various sr class specific data.
- *
- * This API is to be called by the smartreflex class driver to register itself
- * with the smartreflex driver during init. Returns 0 on success else the
- * error value.
- */
-int sr_register_class(struct omap_sr_class_data *class_data)
-{
- struct omap_sr *sr_info;
-
- if (!class_data) {
- pr_warning("%s:, Smartreflex class data passed is NULL\n",
- __func__);
- return -EINVAL;
- }
-
- if (sr_class) {
- pr_warning("%s: Smartreflex class driver already registered\n",
- __func__);
- return -EBUSY;
- }
-
- sr_class = class_data;
-
- /*
- * Call into late init to do intializations that require
- * both sr driver and sr class driver to be initiallized.
- */
- list_for_each_entry(sr_info, &sr_list, node)
- sr_late_init(sr_info);
-
- return 0;
-}
-
-/**
- * omap_sr_enable() - API to enable SR clocks and to call into the
- * registered smartreflex class enable API.
- * @voltdm: VDD pointer to which the SR module to be configured belongs to.
- *
- * This API is to be called from the kernel in order to enable
- * a particular smartreflex module. This API will do the initial
- * configurations to turn on the smartreflex module and in turn call
- * into the registered smartreflex class enable API.
- */
-void omap_sr_enable(struct voltagedomain *voltdm)
-{
- struct omap_sr *sr = _sr_lookup(voltdm);
-
- if (IS_ERR(sr)) {
- pr_warning("%s: omap_sr struct for sr_%s not found\n",
- __func__, voltdm->name);
- return;
- }
-
- if (!sr->autocomp_active)
- return;
-
- if (!sr_class || !(sr_class->enable) || !(sr_class->configure)) {
- dev_warn(&sr->pdev->dev, "%s: smartreflex class driver not"
- "registered\n", __func__);
- return;
- }
-
- sr_class->enable(voltdm);
-}
-
-/**
- * omap_sr_disable() - API to disable SR without resetting the voltage
- * processor voltage
- * @voltdm: VDD pointer to which the SR module to be configured belongs to.
- *
- * This API is to be called from the kernel in order to disable
- * a particular smartreflex module. This API will in turn call
- * into the registered smartreflex class disable API. This API will tell
- * the smartreflex class disable not to reset the VP voltage after
- * disabling smartreflex.
- */
-void omap_sr_disable(struct voltagedomain *voltdm)
-{
- struct omap_sr *sr = _sr_lookup(voltdm);
-
- if (IS_ERR(sr)) {
- pr_warning("%s: omap_sr struct for sr_%s not found\n",
- __func__, voltdm->name);
- return;
- }
-
- if (!sr->autocomp_active)
- return;
-
- if (!sr_class || !(sr_class->disable)) {
- dev_warn(&sr->pdev->dev, "%s: smartreflex class driver not"
- "registered\n", __func__);
- return;
- }
-
- sr_class->disable(voltdm, 0);
-}
-
-/**
- * omap_sr_disable_reset_volt() - API to disable SR and reset the
- * voltage processor voltage
- * @voltdm: VDD pointer to which the SR module to be configured belongs to.
- *
- * This API is to be called from the kernel in order to disable
- * a particular smartreflex module. This API will in turn call
- * into the registered smartreflex class disable API. This API will tell
- * the smartreflex class disable to reset the VP voltage after
- * disabling smartreflex.
- */
-void omap_sr_disable_reset_volt(struct voltagedomain *voltdm)
-{
- struct omap_sr *sr = _sr_lookup(voltdm);
-
- if (IS_ERR(sr)) {
- pr_warning("%s: omap_sr struct for sr_%s not found\n",
- __func__, voltdm->name);
- return;
- }
-
- if (!sr->autocomp_active)
- return;
-
- if (!sr_class || !(sr_class->disable)) {
- dev_warn(&sr->pdev->dev, "%s: smartreflex class driver not"
- "registered\n", __func__);
- return;
- }
-
- sr_class->disable(voltdm, 1);
-}
-
-/**
- * omap_sr_register_pmic() - API to register pmic specific info.
- * @pmic_data: The structure containing pmic specific data.
- *
- * This API is to be called from the PMIC specific code to register with
- * smartreflex driver pmic specific info. Currently the only info required
- * is the smartreflex init on the PMIC side.
- */
-void omap_sr_register_pmic(struct omap_sr_pmic_data *pmic_data)
-{
- if (!pmic_data) {
- pr_warning("%s: Trying to register NULL PMIC data structure"
- "with smartreflex\n", __func__);
- return;
- }
-
- sr_pmic_data = pmic_data;
-}
-
-/* PM Debug FS entries to enable and disable smartreflex. */
-static int omap_sr_autocomp_show(void *data, u64 *val)
-{
- struct omap_sr *sr_info = data;
-
- if (!sr_info) {
- pr_warning("%s: omap_sr struct not found\n", __func__);
- return -EINVAL;
- }
-
- *val = sr_info->autocomp_active;
-
- return 0;
-}
-
-static int omap_sr_autocomp_store(void *data, u64 val)
-{
- struct omap_sr *sr_info = data;
-
- if (!sr_info) {
- pr_warning("%s: omap_sr struct not found\n", __func__);
- return -EINVAL;
- }
-
- /* Sanity check */
- if (val > 1) {
- pr_warning("%s: Invalid argument %lld\n", __func__, val);
- return -EINVAL;
- }
-
- /* control enable/disable only if there is a delta in value */
- if (sr_info->autocomp_active != val) {
- if (!val)
- sr_stop_vddautocomp(sr_info);
- else
- sr_start_vddautocomp(sr_info);
- }
-
- return 0;
-}
-
-DEFINE_SIMPLE_ATTRIBUTE(pm_sr_fops, omap_sr_autocomp_show,
- omap_sr_autocomp_store, "%llu\n");
-
-static int __init omap_sr_probe(struct platform_device *pdev)
-{
- struct omap_sr *sr_info;
- struct omap_sr_data *pdata = pdev->dev.platform_data;
- struct resource *mem, *irq;
- struct dentry *nvalue_dir;
- struct omap_volt_data *volt_data;
- int i, ret = 0;
- char *name;
-
- sr_info = kzalloc(sizeof(struct omap_sr), GFP_KERNEL);
- if (!sr_info) {
- dev_err(&pdev->dev, "%s: unable to allocate sr_info\n",
- __func__);
- return -ENOMEM;
- }
-
- platform_set_drvdata(pdev, sr_info);
-
- if (!pdata) {
- dev_err(&pdev->dev, "%s: platform data missing\n", __func__);
- ret = -EINVAL;
- goto err_free_devinfo;
- }
-
- mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!mem) {
- dev_err(&pdev->dev, "%s: no mem resource\n", __func__);
- ret = -ENODEV;
- goto err_free_devinfo;
- }
-
- mem = request_mem_region(mem->start, resource_size(mem),
- dev_name(&pdev->dev));
- if (!mem) {
- dev_err(&pdev->dev, "%s: no mem region\n", __func__);
- ret = -EBUSY;
- goto err_free_devinfo;
- }
-
- irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-
- pm_runtime_enable(&pdev->dev);
- pm_runtime_irq_safe(&pdev->dev);
-
- sr_info->pdev = pdev;
- sr_info->srid = pdev->id;
- sr_info->voltdm = pdata->voltdm;
- sr_info->nvalue_table = pdata->nvalue_table;
- sr_info->nvalue_count = pdata->nvalue_count;
- sr_info->senn_mod = pdata->senn_mod;
- sr_info->senp_mod = pdata->senp_mod;
- sr_info->autocomp_active = false;
- sr_info->ip_type = pdata->ip_type;
- sr_info->base = ioremap(mem->start, resource_size(mem));
- if (!sr_info->base) {
- dev_err(&pdev->dev, "%s: ioremap fail\n", __func__);
- ret = -ENOMEM;
- goto err_release_region;
- }
-
- if (irq)
- sr_info->irq = irq->start;
-
- sr_set_clk_length(sr_info);
- sr_set_regfields(sr_info);
-
- list_add(&sr_info->node, &sr_list);
-
- /*
- * Call into late init to do intializations that require
- * both sr driver and sr class driver to be initiallized.
- */
- if (sr_class) {
- ret = sr_late_init(sr_info);
- if (ret) {
- pr_warning("%s: Error in SR late init\n", __func__);
- goto err_iounmap;
- }
- }
-
- dev_info(&pdev->dev, "%s: SmartReflex driver initialized\n", __func__);
- if (!sr_dbg_dir) {
- sr_dbg_dir = debugfs_create_dir("smartreflex", NULL);
- if (IS_ERR_OR_NULL(sr_dbg_dir)) {
- ret = PTR_ERR(sr_dbg_dir);
- pr_err("%s:sr debugfs dir creation failed(%d)\n",
- __func__, ret);
- goto err_iounmap;
- }
- }
-
- name = kasprintf(GFP_KERNEL, "sr_%s", sr_info->voltdm->name);
- if (!name) {
- dev_err(&pdev->dev, "%s: Unable to alloc debugfs name\n",
- __func__);
- ret = -ENOMEM;
- goto err_iounmap;
- }
- sr_info->dbg_dir = debugfs_create_dir(name, sr_dbg_dir);
- kfree(name);
- if (IS_ERR_OR_NULL(sr_info->dbg_dir)) {
- dev_err(&pdev->dev, "%s: Unable to create debugfs directory\n",
- __func__);
- ret = PTR_ERR(sr_info->dbg_dir);
- goto err_iounmap;
- }
-
- (void) debugfs_create_file("autocomp", S_IRUGO | S_IWUSR,
- sr_info->dbg_dir, (void *)sr_info, &pm_sr_fops);
- (void) debugfs_create_x32("errweight", S_IRUGO, sr_info->dbg_dir,
- &sr_info->err_weight);
- (void) debugfs_create_x32("errmaxlimit", S_IRUGO, sr_info->dbg_dir,
- &sr_info->err_maxlimit);
- (void) debugfs_create_x32("errminlimit", S_IRUGO, sr_info->dbg_dir,
- &sr_info->err_minlimit);
-
- nvalue_dir = debugfs_create_dir("nvalue", sr_info->dbg_dir);
- if (IS_ERR_OR_NULL(nvalue_dir)) {
- dev_err(&pdev->dev, "%s: Unable to create debugfs directory"
- "for n-values\n", __func__);
- ret = PTR_ERR(nvalue_dir);
- goto err_debugfs;
- }
-
- omap_voltage_get_volttable(sr_info->voltdm, &volt_data);
- if (!volt_data) {
- dev_warn(&pdev->dev, "%s: No Voltage table for the"
- " corresponding vdd vdd_%s. Cannot create debugfs"
- "entries for n-values\n",
- __func__, sr_info->voltdm->name);
- ret = -ENODATA;
- goto err_debugfs;
- }
-
- for (i = 0; i < sr_info->nvalue_count; i++) {
- char name[NVALUE_NAME_LEN + 1];
-
- snprintf(name, sizeof(name), "volt_%d",
- volt_data[i].volt_nominal);
- (void) debugfs_create_x32(name, S_IRUGO | S_IWUSR, nvalue_dir,
- &(sr_info->nvalue_table[i].nvalue));
- }
-
- return ret;
-
-err_debugfs:
- debugfs_remove_recursive(sr_info->dbg_dir);
-err_iounmap:
- list_del(&sr_info->node);
- iounmap(sr_info->base);
-err_release_region:
- release_mem_region(mem->start, resource_size(mem));
-err_free_devinfo:
- kfree(sr_info);
-
- return ret;
-}
-
-static int __devexit omap_sr_remove(struct platform_device *pdev)
-{
- struct omap_sr_data *pdata = pdev->dev.platform_data;
- struct omap_sr *sr_info;
- struct resource *mem;
-
- if (!pdata) {
- dev_err(&pdev->dev, "%s: platform data missing\n", __func__);
- return -EINVAL;
- }
-
- sr_info = _sr_lookup(pdata->voltdm);
- if (IS_ERR(sr_info)) {
- dev_warn(&pdev->dev, "%s: omap_sr struct not found\n",
- __func__);
- return PTR_ERR(sr_info);
- }
-
- if (sr_info->autocomp_active)
- sr_stop_vddautocomp(sr_info);
- if (sr_info->dbg_dir)
- debugfs_remove_recursive(sr_info->dbg_dir);
-
- list_del(&sr_info->node);
- iounmap(sr_info->base);
- kfree(sr_info);
- mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- release_mem_region(mem->start, resource_size(mem));
-
- return 0;
-}
-
-static void __devexit omap_sr_shutdown(struct platform_device *pdev)
-{
- struct omap_sr_data *pdata = pdev->dev.platform_data;
- struct omap_sr *sr_info;
-
- if (!pdata) {
- dev_err(&pdev->dev, "%s: platform data missing\n", __func__);
- return;
- }
-
- sr_info = _sr_lookup(pdata->voltdm);
- if (IS_ERR(sr_info)) {
- dev_warn(&pdev->dev, "%s: omap_sr struct not found\n",
- __func__);
- return;
- }
-
- if (sr_info->autocomp_active)
- sr_stop_vddautocomp(sr_info);
-
- return;
-}
-
-static struct platform_driver smartreflex_driver = {
- .remove = __devexit_p(omap_sr_remove),
- .shutdown = __devexit_p(omap_sr_shutdown),
- .driver = {
- .name = "smartreflex",
- },
-};
-
-static int __init sr_init(void)
-{
- int ret = 0;
-
- /*
- * sr_init is a late init. If by then a pmic specific API is not
- * registered either there is no need for anything to be done on
- * the PMIC side or somebody has forgotten to register a PMIC
- * handler. Warn for the second condition.
- */
- if (sr_pmic_data && sr_pmic_data->sr_pmic_init)
- sr_pmic_data->sr_pmic_init();
- else
- pr_warning("%s: No PMIC hook to init smartreflex\n", __func__);
-
- ret = platform_driver_probe(&smartreflex_driver, omap_sr_probe);
- if (ret) {
- pr_err("%s: platform driver register failed for SR\n",
- __func__);
- return ret;
- }
-
- return 0;
-}
-late_initcall(sr_init);
-
-static void __exit sr_exit(void)
-{
- platform_driver_unregister(&smartreflex_driver);
-}
-module_exit(sr_exit);
-
-MODULE_DESCRIPTION("OMAP Smartreflex Driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:" DRIVER_NAME);
-MODULE_AUTHOR("Texas Instruments Inc");