22 #include "prm-regbits-34xx.h"
23 #include "prm-regbits-44xx.h"
55  * struct omap_vc_channel_cfg - describe the cfg_channel bitfield
104  * omap_vc_config_channel - configure VC channel to PMIC mappings
107  * Configures the VC channel to PMIC mappings for the following
108  * PMIC settings
109  * - i2c slave address (SA)
110  * - voltage configuration address (RAV)
111  * - command configuration address (RAC) and enable bit (RACEN)
112  * - command values for ON, ONLP, RET and OFF (CMD)
115  * non-default channel.  Starting with OMAP4, there are more than 2
117  * Only the non-default channel can be configured.
121 	struct omap_vc_channel *vc = voltdm->vc;  in omap_vc_config_channel()
127 	if (vc->flags & OMAP_VC_CHANNEL_DEFAULT)  in omap_vc_config_channel()
128 		vc->cfg_channel &= vc_cfg_bits->racen;  in omap_vc_config_channel()
130 	voltdm->rmw(CFG_CHANNEL_MASK << vc->cfg_channel_sa_shift,  in omap_vc_config_channel()
131 		    vc->cfg_channel << vc->cfg_channel_sa_shift,  in omap_vc_config_channel()
132 		    vc->cfg_channel_reg);  in omap_vc_config_channel()
142 	struct omap_vc_channel *vc = voltdm->vc;  in omap_vc_pre_scale()
145 	/* Check if sufficient pmic info is available for this vdd */  in omap_vc_pre_scale()
146 	if (!voltdm->pmic) {  in omap_vc_pre_scale()
147 		pr_err("%s: Insufficient pmic info to scale the vdd_%s\n",  in omap_vc_pre_scale()
148 			__func__, voltdm->name);  in omap_vc_pre_scale()
149 		return -EINVAL;  in omap_vc_pre_scale()
152 	if (!voltdm->pmic->uv_to_vsel) {  in omap_vc_pre_scale()
153 …pr_err("%s: PMIC function to convert voltage in uV to vsel not registered. Hence unable to scale v…  in omap_vc_pre_scale()
154 		       __func__, voltdm->name);  in omap_vc_pre_scale()
155 		return -ENODATA;  in omap_vc_pre_scale()
158 	if (!voltdm->read || !voltdm->write) {  in omap_vc_pre_scale()
160 			__func__, voltdm->name);  in omap_vc_pre_scale()
161 		return -EINVAL;  in omap_vc_pre_scale()
164 	*target_vsel = voltdm->pmic->uv_to_vsel(target_volt);  in omap_vc_pre_scale()
165 	*current_vsel = voltdm->pmic->uv_to_vsel(voltdm->nominal_volt);  in omap_vc_pre_scale()
168 	vc_cmdval = voltdm->read(vc->cmdval_reg);  in omap_vc_pre_scale()
169 	vc_cmdval &= ~vc->common->cmd_on_mask;  in omap_vc_pre_scale()
170 	vc_cmdval |= (*target_vsel << vc->common->cmd_on_shift);  in omap_vc_pre_scale()
171 	voltdm->write(vc_cmdval, vc->cmdval_reg);  in omap_vc_pre_scale()
173 	voltdm->vc_param->on = target_volt;  in omap_vc_pre_scale()
186 	smps_steps = abs(target_vsel - current_vsel);  in omap_vc_post_scale()
188 	smps_delay = ((smps_steps * voltdm->pmic->step_size) /  in omap_vc_post_scale()
189 			voltdm->pmic->slew_rate) + 2;  in omap_vc_post_scale()
193 /* vc_bypass_scale - VC bypass method of voltage scaling */
197 	struct omap_vc_channel *vc = voltdm->vc;  in omap_vc_bypass_scale()
207 	vc_valid = vc->common->valid;  in omap_vc_bypass_scale()
208 	vc_bypass_val_reg = vc->common->bypass_val_reg;  in omap_vc_bypass_scale()
209 	vc_bypass_value = (target_vsel << vc->common->data_shift) |  in omap_vc_bypass_scale()
210 		(vc->volt_reg_addr << vc->common->regaddr_shift) |  in omap_vc_bypass_scale()
211 		(vc->i2c_slave_addr << vc->common->slaveaddr_shift);  in omap_vc_bypass_scale()
213 	voltdm->write(vc_bypass_value, vc_bypass_val_reg);  in omap_vc_bypass_scale()
214 	voltdm->write(vc_bypass_value | vc_valid, vc_bypass_val_reg);  in omap_vc_bypass_scale()
216 	vc_bypass_value = voltdm->read(vc_bypass_val_reg);  in omap_vc_bypass_scale()
227 			return -ETIMEDOUT;  in omap_vc_bypass_scale()
235 		vc_bypass_value = voltdm->read(vc_bypass_val_reg);  in omap_vc_bypass_scale()
278 			voltsetup2 = c->voltsetup2;  in omap3_vc_set_pmic_signaling()
280 			voltsetup1 = c->voltsetup1;  in omap3_vc_set_pmic_signaling()
288 		voltsetup1 = c->voltsetup1;  in omap3_vc_set_pmic_signaling()
293 		vd->write(voltctrl, OMAP3_PRM_VOLTCTRL_OFFSET);  in omap3_vc_set_pmic_signaling()
297 		vd->write(c->voltsetup1,  in omap3_vc_set_pmic_signaling()
302 		vd->write(c->voltsetup2,  in omap3_vc_set_pmic_signaling()
325 	vd->write(val, OMAP4_PRM_VOLTCTRL_OFFSET);  in omap4_vc_set_pmic_signaling()
342 	val = voltdm->read(OMAP3_PRM_POLCTRL_OFFSET);  in omap3_vc_init_pmic_signaling()
349 		voltdm->write(val, OMAP3_PRM_POLCTRL_OFFSET);  in omap3_vc_init_pmic_signaling()
357 	 * idle. And we can also scale voltages to zero for off-idle.  in omap3_vc_init_pmic_signaling()
358 	 * Note that no actual voltage scaling during off-idle will  in omap3_vc_init_pmic_signaling()
359 	 * happen unless the board specific twl4030 PMIC scripts are  in omap3_vc_init_pmic_signaling()
363 	val = voltdm->read(OMAP3_PRM_VOLTCTRL_OFFSET);  in omap3_vc_init_pmic_signaling()
368 		voltdm->write(val, OMAP3_PRM_VOLTCTRL_OFFSET);  in omap3_vc_init_pmic_signaling()
380 	val = (voltdm->vc_param->on - idle) / voltdm->pmic->slew_rate;  in omap3_init_voltsetup1()
381 	val *= voltdm->sys_clk.rate / 8 / 1000000 + 1;  in omap3_init_voltsetup1()
382 	val <<= __ffs(voltdm->vfsm->voltsetup_mask);  in omap3_init_voltsetup1()
383 	c->voltsetup1 &= ~voltdm->vfsm->voltsetup_mask;  in omap3_init_voltsetup1()
384 	c->voltsetup1 |= val;  in omap3_init_voltsetup1()
388  * omap3_set_i2c_timings - sets i2c sleep timings for a channel
396  * off-mode.
398  * Note that pmic is not controlling the voltage scaling during
408 	omap3_init_voltsetup1(voltdm, c, voltdm->vc_param->off);  in omap3_set_i2c_timings()
411 	omap3_init_voltsetup1(voltdm, c, voltdm->vc_param->ret);  in omap3_set_i2c_timings()
415  * omap3_set_off_timings - sets off-mode timings for a channel
418  * Calculates and sets up off-mode timings for a channel. Off-mode
434 	if (c->voltsetup2)  in omap3_set_off_timings()
439 		pr_debug("PM: oscillator start-up time not initialized, using 10ms\n");  in omap3_set_off_timings()
450 	 * start-up time since voltoffset2 = clksetup - voltoffset.  in omap3_set_off_timings()
453 	c->voltsetup2 = clksetup - voltoffset;  in omap3_set_off_timings()
454 	voltdm->write(clksetup, OMAP3_PRM_CLKSETUP_OFFSET);  in omap3_set_off_timings()
455 	voltdm->write(voltoffset, OMAP3_PRM_VOLTOFFSET_OFFSET);  in omap3_set_off_timings()
466  * omap4_calc_volt_ramp - calculates voltage ramping delays on omap4
481 	time = voltage_diff / voltdm->pmic->slew_rate;  in omap4_calc_volt_ramp()
483 	cycles = voltdm->sys_clk.rate / 1000 * time / 1000;  in omap4_calc_volt_ramp()
511 			voltdm->name);  in omap4_calc_volt_ramp()
522  * omap4_usec_to_val_scrm - convert microsecond value to SCRM module bitfield
546  * omap4_set_timings - set voltage ramp timings for a channel
548  * @off_mode: whether off-mode values are used
561 			voltdm->vc_param->on - voltdm->vc_param->off);  in omap4_set_timings()
562 		offset = voltdm->vfsm->voltsetup_off_reg;  in omap4_set_timings()
565 			voltdm->vc_param->on - voltdm->vc_param->ret);  in omap4_set_timings()
566 		offset = voltdm->vfsm->voltsetup_reg;  in omap4_set_timings()
572 	val = voltdm->read(offset);  in omap4_set_timings()
578 	voltdm->write(val, offset);  in omap4_set_timings()
596 	voltdm->write(OMAP4_VDD_DEFAULT_VAL, OMAP4_PRM_VOLTCTRL_OFFSET);  in omap4_vc_init_pmic_signaling()
599 /* OMAP4 specific voltage init functions */
657  * omap4_vc_i2c_timing_init - sets up board I2C timing parameters
660  * Use PMIC + board supplied settings for calculating the total I2C
662  * Pre-calculated values are provided in data tables, as it is not
672 	if (!voltdm->pmic->i2c_high_speed) {  in omap4_vc_i2c_timing_init()
673 		pr_info("%s: using bootloader low-speed timings\n", __func__);  in omap4_vc_i2c_timing_init()
683 	/* PMIC pad capacitance */  in omap4_vc_i2c_timing_init()
684 	capacitance += voltdm->pmic->i2c_pad_load;  in omap4_vc_i2c_timing_init()
689 	while (i2c_data->load > capacitance)  in omap4_vc_i2c_timing_init()
693 	switch (voltdm->sys_clk.rate) {  in omap4_vc_i2c_timing_init()
695 		hsscll = i2c_data->hsscll_38_4;  in omap4_vc_i2c_timing_init()
698 		hsscll = i2c_data->hsscll_26;  in omap4_vc_i2c_timing_init()
701 		hsscll = i2c_data->hsscll_19_2;  in omap4_vc_i2c_timing_init()
704 		hsscll = i2c_data->hsscll_16_8;  in omap4_vc_i2c_timing_init()
707 		hsscll = i2c_data->hsscll_12;  in omap4_vc_i2c_timing_init()
711 			voltdm->sys_clk.rate);  in omap4_vc_i2c_timing_init()
716 	val = i2c_data->loadbits << 25 | i2c_data->loadbits << 29;  in omap4_vc_i2c_timing_init()
727 	voltdm->write(val, OMAP4_PRM_VC_CFG_I2C_CLK_OFFSET);  in omap4_vc_i2c_timing_init()
733  * omap_vc_i2c_init - initialize I2C interface to PMIC
736  * Use PMIC supplied settings for I2C high-speed mode and
747 	struct omap_vc_channel *vc = voltdm->vc;  in omap_vc_i2c_init()
753 		if (voltdm->pmic->i2c_high_speed != i2c_high_speed)  in omap_vc_i2c_init()
755 				__func__, voltdm->name, i2c_high_speed);  in omap_vc_i2c_init()
766 	i2c_high_speed = voltdm->pmic->i2c_high_speed;  in omap_vc_i2c_init()
768 		voltdm->rmw(vc->common->i2c_cfg_clear_mask,  in omap_vc_i2c_init()
769 			    vc->common->i2c_cfg_hsen_mask,  in omap_vc_i2c_init()
770 			    vc->common->i2c_cfg_reg);  in omap_vc_i2c_init()
772 	mcode = voltdm->pmic->i2c_mcode;  in omap_vc_i2c_init()
774 		voltdm->rmw(vc->common->i2c_mcode_mask,  in omap_vc_i2c_init()
775 			    mcode << __ffs(vc->common->i2c_mcode_mask),  in omap_vc_i2c_init()
776 			    vc->common->i2c_cfg_reg);  in omap_vc_i2c_init()
785  * omap_vc_calc_vsel - calculate vsel value for a channel
789  * Converts a microvolt value to vsel value for the used PMIC.
796 	if (voltdm->pmic->vddmin > uvolt)  in omap_vc_calc_vsel()
797 		uvolt = voltdm->pmic->vddmin;  in omap_vc_calc_vsel()
798 	if (voltdm->pmic->vddmax < uvolt) {  in omap_vc_calc_vsel()
799 		WARN(1, "%s: voltage not supported by pmic: %u vs max %u\n",  in omap_vc_calc_vsel()
800 			__func__, uvolt, voltdm->pmic->vddmax);  in omap_vc_calc_vsel()
802 		uvolt = voltdm->pmic->vddmax;  in omap_vc_calc_vsel()
805 	return voltdm->pmic->uv_to_vsel(uvolt);  in omap_vc_calc_vsel()
810  * omap_pm_setup_sr_i2c_pcb_length - set length of SR I2C traces on PCB
825 	struct omap_vc_channel *vc = voltdm->vc;  in omap_vc_init_channel()
829 	if (!voltdm->pmic || !voltdm->pmic->uv_to_vsel) {  in omap_vc_init_channel()
830 		pr_err("%s: No PMIC info for vdd_%s\n", __func__, voltdm->name);  in omap_vc_init_channel()
834 	if (!voltdm->read || !voltdm->write) {  in omap_vc_init_channel()
836 			__func__, voltdm->name);  in omap_vc_init_channel()
840 	vc->cfg_channel = 0;  in omap_vc_init_channel()
841 	if (vc->flags & OMAP_VC_CHANNEL_CFG_MUTANT)  in omap_vc_init_channel()
846 	/* get PMIC/board specific settings */  in omap_vc_init_channel()
847 	vc->i2c_slave_addr = voltdm->pmic->i2c_slave_addr;  in omap_vc_init_channel()
848 	vc->volt_reg_addr = voltdm->pmic->volt_reg_addr;  in omap_vc_init_channel()
849 	vc->cmd_reg_addr = voltdm->pmic->cmd_reg_addr;  in omap_vc_init_channel()
852 	voltdm->rmw(vc->smps_sa_mask,  in omap_vc_init_channel()
853 		    vc->i2c_slave_addr << __ffs(vc->smps_sa_mask),  in omap_vc_init_channel()
854 		    vc->smps_sa_reg);  in omap_vc_init_channel()
855 	vc->cfg_channel |= vc_cfg_bits->sa;  in omap_vc_init_channel()
858 	 * Configure the PMIC register addresses.  in omap_vc_init_channel()
860 	voltdm->rmw(vc->smps_volra_mask,  in omap_vc_init_channel()
861 		    vc->volt_reg_addr << __ffs(vc->smps_volra_mask),  in omap_vc_init_channel()
862 		    vc->smps_volra_reg);  in omap_vc_init_channel()
863 	vc->cfg_channel |= vc_cfg_bits->rav;  in omap_vc_init_channel()
865 	if (vc->cmd_reg_addr) {  in omap_vc_init_channel()
866 		voltdm->rmw(vc->smps_cmdra_mask,  in omap_vc_init_channel()
867 			    vc->cmd_reg_addr << __ffs(vc->smps_cmdra_mask),  in omap_vc_init_channel()
868 			    vc->smps_cmdra_reg);  in omap_vc_init_channel()
869 		vc->cfg_channel |= vc_cfg_bits->rac;  in omap_vc_init_channel()
872 	if (vc->cmd_reg_addr == vc->volt_reg_addr)  in omap_vc_init_channel()
873 		vc->cfg_channel |= vc_cfg_bits->racen;  in omap_vc_init_channel()
876 	on_vsel = omap_vc_calc_vsel(voltdm, voltdm->vc_param->on);  in omap_vc_init_channel()
877 	onlp_vsel = omap_vc_calc_vsel(voltdm, voltdm->vc_param->onlp);  in omap_vc_init_channel()
878 	ret_vsel = omap_vc_calc_vsel(voltdm, voltdm->vc_param->ret);  in omap_vc_init_channel()
879 	off_vsel = omap_vc_calc_vsel(voltdm, voltdm->vc_param->off);  in omap_vc_init_channel()
881 	val = ((on_vsel << vc->common->cmd_on_shift) |  in omap_vc_init_channel()
882 	       (onlp_vsel << vc->common->cmd_onlp_shift) |  in omap_vc_init_channel()
883 	       (ret_vsel << vc->common->cmd_ret_shift) |  in omap_vc_init_channel()
884 	       (off_vsel << vc->common->cmd_off_shift));  in omap_vc_init_channel()
885 	voltdm->write(val, vc->cmdval_reg);  in omap_vc_init_channel()
886 	vc->cfg_channel |= vc_cfg_bits->cmd;  in omap_vc_init_channel()