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