1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * OMAP3/4 Voltage Controller (VC) structure and macro definitions
4  *
5  * Copyright (C) 2007, 2010 Texas Instruments, Inc.
6  * Rajendra Nayak <rnayak@ti.com>
7  * Lesly A M <x0080970@ti.com>
8  * Thara Gopinath <thara@ti.com>
9  *
10  * Copyright (C) 2008, 2011 Nokia Corporation
11  * Kalle Jokiniemi
12  * Paul Walmsley
13  */
14 #ifndef __ARCH_ARM_MACH_OMAP2_VC_H
15 #define __ARCH_ARM_MACH_OMAP2_VC_H
16 
17 #include <linux/kernel.h>
18 
19 struct voltagedomain;
20 
21 /**
22  * struct omap_vc_common - per-VC register/bitfield data
23  * @cmd_on_mask: ON bitmask in PRM_VC_CMD_VAL* register
24  * @valid: VALID bitmask in PRM_VC_BYPASS_VAL register
25  * @bypass_val_reg: Offset of PRM_VC_BYPASS_VAL reg from PRM start
26  * @data_shift: DATA field shift in PRM_VC_BYPASS_VAL register
27  * @slaveaddr_shift: SLAVEADDR field shift in PRM_VC_BYPASS_VAL register
28  * @regaddr_shift: REGADDR field shift in PRM_VC_BYPASS_VAL register
29  * @cmd_on_shift: ON field shift in PRM_VC_CMD_VAL_* register
30  * @cmd_onlp_shift: ONLP field shift in PRM_VC_CMD_VAL_* register
31  * @cmd_ret_shift: RET field shift in PRM_VC_CMD_VAL_* register
32  * @cmd_off_shift: OFF field shift in PRM_VC_CMD_VAL_* register
33  * @i2c_cfg_reg: I2C configuration register offset
34  * @i2c_cfg_clear_mask: high-speed mode bit clear mask in I2C config register
35  * @i2c_cfg_hsen_mask: high-speed mode bit field mask in I2C config register
36  * @i2c_mcode_mask: MCODE field mask for I2C config register
37  *
38  * XXX One of cmd_on_mask and cmd_on_shift are not needed
39  * XXX VALID should probably be a shift, not a mask
40  */
41 struct omap_vc_common {
42 	u32 cmd_on_mask;
43 	u32 valid;
44 	u8 bypass_val_reg;
45 	u8 data_shift;
46 	u8 slaveaddr_shift;
47 	u8 regaddr_shift;
48 	u8 cmd_on_shift;
49 	u8 cmd_onlp_shift;
50 	u8 cmd_ret_shift;
51 	u8 cmd_off_shift;
52 	u8 i2c_cfg_reg;
53 	u8 i2c_cfg_clear_mask;
54 	u8 i2c_cfg_hsen_mask;
55 	u8 i2c_mcode_mask;
56 };
57 
58 /* omap_vc_channel.flags values */
59 #define OMAP_VC_CHANNEL_DEFAULT BIT(0)
60 #define OMAP_VC_CHANNEL_CFG_MUTANT BIT(1)
61 
62 /**
63  * struct omap_vc_channel - VC per-instance data
64  * @i2c_slave_addr: I2C slave address of PMIC for this VC channel
65  * @volt_reg_addr: voltage configuration register address
66  * @cmd_reg_addr: command configuration register address
67  * @setup_time: setup time (in sys_clk cycles) of regulator for this channel
68  * @cfg_channel: current value of VC channel configuration register
69  * @i2c_high_speed: whether or not to use I2C high-speed mode
70  *
71  * @common: pointer to VC common data for this platform
72  * @smps_sa_mask: i2c slave address bitmask in the PRM_VC_SMPS_SA register
73  * @smps_volra_mask: VOLRA* bitmask in the PRM_VC_VOL_RA register
74  * @smps_cmdra_mask: CMDRA* bitmask in the PRM_VC_CMD_RA register
75  * @cmdval_reg: register for on/ret/off voltage level values for this channel
76  * @smps_sa_reg: Offset of PRM_VC_SMPS_SA reg from PRM start
77  * @smps_volra_reg: Offset of PRM_VC_SMPS_VOL_RA reg from PRM start
78  * @smps_cmdra_reg: Offset of PRM_VC_SMPS_CMD_RA reg from PRM start
79  * @cfg_channel_reg: VC channel configuration register
80  * @cfg_channel_sa_shift: bit shift for slave address cfg_channel register
81  * @flags: VC channel-specific flags (optional)
82  */
83 struct omap_vc_channel {
84 	/* channel state */
85 	u16 i2c_slave_addr;
86 	u16 volt_reg_addr;
87 	u16 cmd_reg_addr;
88 	u8 cfg_channel;
89 	bool i2c_high_speed;
90 
91 	/* register access data */
92 	const struct omap_vc_common *common;
93 	u32 smps_sa_mask;
94 	u32 smps_volra_mask;
95 	u32 smps_cmdra_mask;
96 	u8 cmdval_reg;
97 	u8 smps_sa_reg;
98 	u8 smps_volra_reg;
99 	u8 smps_cmdra_reg;
100 	u8 cfg_channel_reg;
101 	u8 cfg_channel_sa_shift;
102 	u8 flags;
103 };
104 
105 extern struct omap_vc_channel omap3_vc_mpu;
106 extern struct omap_vc_channel omap3_vc_core;
107 
108 extern struct omap_vc_channel omap4_vc_mpu;
109 extern struct omap_vc_channel omap4_vc_iva;
110 extern struct omap_vc_channel omap4_vc_core;
111 
112 extern struct omap_vc_param omap3_mpu_vc_data;
113 extern struct omap_vc_param omap3_core_vc_data;
114 
115 extern struct omap_vc_param omap4_mpu_vc_data;
116 extern struct omap_vc_param omap4_iva_vc_data;
117 extern struct omap_vc_param omap4_core_vc_data;
118 
119 void omap3_vc_set_pmic_signaling(int core_next_state);
120 void omap4_vc_set_pmic_signaling(int core_next_state);
121 
122 void omap_vc_init_channel(struct voltagedomain *voltdm);
123 int omap_vc_pre_scale(struct voltagedomain *voltdm,
124 		      unsigned long target_volt,
125 		      u8 *target_vsel, u8 *current_vsel);
126 void omap_vc_post_scale(struct voltagedomain *voltdm,
127 			unsigned long target_volt,
128 			u8 target_vsel, u8 current_vsel);
129 int omap_vc_bypass_scale(struct voltagedomain *voltdm,
130 			 unsigned long target_volt);
131 
132 #endif
133 
134