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mfd: Add support for TWL4030/5030 dynamic power switching

Browse source 
The TWL4030/5030 family of multifunction devices allows board-specific
control of the the various regulators, clock and reset lines through
'scripts' that are loaded into its memory. This allows for Dynamic Power
Switching (DPS).

Implement board-independent core support for DPS that is then used by
board-specific code to load custom DPS scripts.

Signed-off-by: Amit Kucheria <amit.kucheria@verdurent.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Amit Kucheria 2009-08-31 18:32:18 +02:00 committed by Samuel Ortiz
parent 12992dd89c
commit ebf0bd366e
5 changed files with 574 additions and 10 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

13
drivers/mfd/Kconfig
View file

@ -108,6 +108,19 @@ config TWL4030_CORE
high speed USB OTG transceiver, an audio codec (on most
versions) and many other features.
config TWL4030_POWER
bool "Support power resources on TWL4030 family chips"
depends on TWL4030_CORE && ARM
help
Say yes here if you want to use the power resources on the
TWL4030 family chips. Most of these resources are regulators,
which have a separate driver; some are control signals, such
as clock request handshaking.
This driver uses board-specific data to initialize the resources
and load scripts controling which resources are switched off/on
or reset when a sleep, wakeup or warm reset event occurs.
config MFD_TMIO
bool
default n

1
drivers/mfd/Makefile
View file

@ -25,6 +25,7 @@ obj-$(CONFIG_TPS65010) += tps65010.o
obj-$(CONFIG_MENELAUS) += menelaus.o
obj-$(CONFIG_TWL4030_CORE) += twl4030-core.o twl4030-irq.o
obj-$(CONFIG_TWL4030_POWER) += twl4030-power.o
obj-$(CONFIG_MFD_MC13783) += mc13783-core.o

10
drivers/mfd/twl4030-core.c
View file

@ -89,6 +89,12 @@
#define twl_has_madc() false
#endif
#ifdef CONFIG_TWL4030_POWER
#define twl_has_power() true
#else
#define twl_has_power() false
#endif
#if defined(CONFIG_RTC_DRV_TWL4030) || defined(CONFIG_RTC_DRV_TWL4030_MODULE)
#define twl_has_rtc() true
#else
@ -801,6 +807,10 @@ twl4030_probe(struct i2c_client *client, const struct i2c_device_id *id)
/* setup clock framework */
clocks_init(&client->dev);
/* load power event scripts */
if (twl_has_power() && pdata->power)
twl4030_power_init(pdata->power);
/* Maybe init the T2 Interrupt subsystem */
if (client->irq
&& pdata->irq_base

466
drivers/mfd/twl4030-power.c Normal file
View file

@ -0,0 +1,466 @@
/*
* linux/drivers/i2c/chips/twl4030-power.c
*
* Handle TWL4030 Power initialization
*
* Copyright (C) 2008 Nokia Corporation
* Copyright (C) 2006 Texas Instruments, Inc
*
* Written by Kalle Jokiniemi
* Peter De Schrijver <peter.de-schrijver@nokia.com>
* Several fixes by Amit Kucheria <amit.kucheria@verdurent.com>
*
* This file is subject to the terms and conditions of the GNU General
* Public License. See the file "COPYING" in the main directory of this
* archive for more details.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/module.h>
#include <linux/pm.h>
#include <linux/i2c/twl4030.h>
#include <linux/platform_device.h>
#include <asm/mach-types.h>
static u8 twl4030_start_script_address = 0x2b;
#define PWR_P1_SW_EVENTS 0x10
#define PWR_DEVOFF (1<<0)
#define PHY_TO_OFF_PM_MASTER(p) (p - 0x36)
#define PHY_TO_OFF_PM_RECEIVER(p) (p - 0x5b)
/* resource - hfclk */
#define R_HFCLKOUT_DEV_GRP PHY_TO_OFF_PM_RECEIVER(0xe6)
/* PM events */
#define R_P1_SW_EVENTS PHY_TO_OFF_PM_MASTER(0x46)
#define R_P2_SW_EVENTS PHY_TO_OFF_PM_MASTER(0x47)
#define R_P3_SW_EVENTS PHY_TO_OFF_PM_MASTER(0x48)
#define R_CFG_P1_TRANSITION PHY_TO_OFF_PM_MASTER(0x36)
#define R_CFG_P2_TRANSITION PHY_TO_OFF_PM_MASTER(0x37)
#define R_CFG_P3_TRANSITION PHY_TO_OFF_PM_MASTER(0x38)
#define LVL_WAKEUP 0x08
#define ENABLE_WARMRESET (1<<4)
#define END_OF_SCRIPT 0x3f
#define R_SEQ_ADD_A2S PHY_TO_OFF_PM_MASTER(0x55)
#define R_SEQ_ADD_S2A12 PHY_TO_OFF_PM_MASTER(0x56)
#define R_SEQ_ADD_S2A3 PHY_TO_OFF_PM_MASTER(0x57)
#define R_SEQ_ADD_WARM PHY_TO_OFF_PM_MASTER(0x58)
#define R_MEMORY_ADDRESS PHY_TO_OFF_PM_MASTER(0x59)
#define R_MEMORY_DATA PHY_TO_OFF_PM_MASTER(0x5a)
#define R_PROTECT_KEY 0x0E
#define KEY_1 0xC0
#define KEY_2 0x0C
/* resource configuration registers */
#define DEVGROUP_OFFSET 0
#define TYPE_OFFSET 1
/* Bit positions */
#define DEVGROUP_SHIFT 5
#define DEVGROUP_MASK (7 << DEVGROUP_SHIFT)
#define TYPE_SHIFT 0
#define TYPE_MASK (7 << TYPE_SHIFT)
#define TYPE2_SHIFT 3
#define TYPE2_MASK (3 << TYPE2_SHIFT)
static u8 res_config_addrs[] = {
[RES_VAUX1] = 0x17,
[RES_VAUX2] = 0x1b,
[RES_VAUX3] = 0x1f,
[RES_VAUX4] = 0x23,
[RES_VMMC1] = 0x27,
[RES_VMMC2] = 0x2b,
[RES_VPLL1] = 0x2f,
[RES_VPLL2] = 0x33,
[RES_VSIM] = 0x37,
[RES_VDAC] = 0x3b,
[RES_VINTANA1] = 0x3f,
[RES_VINTANA2] = 0x43,
[RES_VINTDIG] = 0x47,
[RES_VIO] = 0x4b,
[RES_VDD1] = 0x55,
[RES_VDD2] = 0x63,
[RES_VUSB_1V5] = 0x71,
[RES_VUSB_1V8] = 0x74,
[RES_VUSB_3V1] = 0x77,
[RES_VUSBCP] = 0x7a,
[RES_REGEN] = 0x7f,
[RES_NRES_PWRON] = 0x82,
[RES_CLKEN] = 0x85,
[RES_SYSEN] = 0x88,
[RES_HFCLKOUT] = 0x8b,
[RES_32KCLKOUT] = 0x8e,
[RES_RESET] = 0x91,
[RES_Main_Ref] = 0x94,
};
static int __init twl4030_write_script_byte(u8 address, u8 byte)
{
int err;
err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address,
R_MEMORY_ADDRESS);
if (err)
goto out;
err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, byte,
R_MEMORY_DATA);
out:
return err;
}
static int __init twl4030_write_script_ins(u8 address, u16 pmb_message,
u8 delay, u8 next)
{
int err;
address *= 4;
err = twl4030_write_script_byte(address++, pmb_message >> 8);
if (err)
goto out;
err = twl4030_write_script_byte(address++, pmb_message & 0xff);
if (err)
goto out;
err = twl4030_write_script_byte(address++, delay);
if (err)
goto out;
err = twl4030_write_script_byte(address++, next);
out:
return err;
}
static int __init twl4030_write_script(u8 address, struct twl4030_ins *script,
int len)
{
int err;
for (; len; len--, address++, script++) {
if (len == 1) {
err = twl4030_write_script_ins(address,
script->pmb_message,
script->delay,
END_OF_SCRIPT);
if (err)
break;
} else {
err = twl4030_write_script_ins(address,
script->pmb_message,
script->delay,
address + 1);
if (err)
break;
}
}
return err;
}
static int __init twl4030_config_wakeup3_sequence(u8 address)
{
int err;
u8 data;
/* Set SLEEP to ACTIVE SEQ address for P3 */
err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address,
R_SEQ_ADD_S2A3);
if (err)
goto out;
/* P3 LVL_WAKEUP should be on LEVEL */
err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &data,
R_P3_SW_EVENTS);
if (err)
goto out;
data |= LVL_WAKEUP;
err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, data,
R_P3_SW_EVENTS);
out:
if (err)
pr_err("TWL4030 wakeup sequence for P3 config error\n");
return err;
}
static int __init twl4030_config_wakeup12_sequence(u8 address)
{
int err = 0;
u8 data;
/* Set SLEEP to ACTIVE SEQ address for P1 and P2 */
err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address,
R_SEQ_ADD_S2A12);
if (err)
goto out;
/* P1/P2 LVL_WAKEUP should be on LEVEL */
err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &data,
R_P1_SW_EVENTS);
if (err)
goto out;
data |= LVL_WAKEUP;
err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, data,
R_P1_SW_EVENTS);
if (err)
goto out;
err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &data,
R_P2_SW_EVENTS);
if (err)
goto out;
data |= LVL_WAKEUP;
err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, data,
R_P2_SW_EVENTS);
if (err)
goto out;
if (machine_is_omap_3430sdp() || machine_is_omap_ldp()) {
/* Disabling AC charger effect on sleep-active transitions */
err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &data,
R_CFG_P1_TRANSITION);
if (err)
goto out;
data &= ~(1<<1);
err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, data ,
R_CFG_P1_TRANSITION);
if (err)
goto out;
}
out:
if (err)
pr_err("TWL4030 wakeup sequence for P1 and P2" \
"config error\n");
return err;
}
static int __init twl4030_config_sleep_sequence(u8 address)
{
int err;
/* Set ACTIVE to SLEEP SEQ address in T2 memory*/
err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address,
R_SEQ_ADD_A2S);
if (err)
pr_err("TWL4030 sleep sequence config error\n");
return err;
}
static int __init twl4030_config_warmreset_sequence(u8 address)
{
int err;
u8 rd_data;
/* Set WARM RESET SEQ address for P1 */
err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address,
R_SEQ_ADD_WARM);
if (err)
goto out;
/* P1/P2/P3 enable WARMRESET */
err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &rd_data,
R_P1_SW_EVENTS);
if (err)
goto out;
rd_data |= ENABLE_WARMRESET;
err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, rd_data,
R_P1_SW_EVENTS);
if (err)
goto out;
err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &rd_data,
R_P2_SW_EVENTS);
if (err)
goto out;
rd_data |= ENABLE_WARMRESET;
err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, rd_data,
R_P2_SW_EVENTS);
if (err)
goto out;
err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &rd_data,
R_P3_SW_EVENTS);
if (err)
goto out;
rd_data |= ENABLE_WARMRESET;
err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, rd_data,
R_P3_SW_EVENTS);
out:
if (err)
pr_err("TWL4030 warmreset seq config error\n");
return err;
}
static int __init twl4030_configure_resource(struct twl4030_resconfig *rconfig)
{
int rconfig_addr;
int err;
u8 type;
u8 grp;
if (rconfig->resource > TOTAL_RESOURCES) {
pr_err("TWL4030 Resource %d does not exist\n",
rconfig->resource);
return -EINVAL;
}
rconfig_addr = res_config_addrs[rconfig->resource];
/* Set resource group */
err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_RECEIVER, &grp,
rconfig_addr + DEVGROUP_OFFSET);
if (err) {
pr_err("TWL4030 Resource %d group could not be read\n",
rconfig->resource);
return err;
}
if (rconfig->devgroup >= 0) {
grp &= ~DEVGROUP_MASK;
grp |= rconfig->devgroup << DEVGROUP_SHIFT;
err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
grp, rconfig_addr + DEVGROUP_OFFSET);
if (err < 0) {
pr_err("TWL4030 failed to program devgroup\n");
return err;
}
}
/* Set resource types */
err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_RECEIVER, &type,
rconfig_addr + TYPE_OFFSET);
if (err < 0) {
pr_err("TWL4030 Resource %d type could not be read\n",
rconfig->resource);
return err;
}
if (rconfig->type >= 0) {
type &= ~TYPE_MASK;
type |= rconfig->type << TYPE_SHIFT;
}
if (rconfig->type2 >= 0) {
type &= ~TYPE2_MASK;
type |= rconfig->type2 << TYPE2_SHIFT;
}
err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
type, rconfig_addr + TYPE_OFFSET);
if (err < 0) {
pr_err("TWL4030 failed to program resource type\n");
return err;
}
return 0;
}
static int __init load_twl4030_script(struct twl4030_script *tscript,
u8 address)
{
int err;
/* Make sure the script isn't going beyond last valid address (0x3f) */
if ((address + tscript->size) > END_OF_SCRIPT) {
pr_err("TWL4030 scripts too big error\n");
return -EINVAL;
}
err = twl4030_write_script(address, tscript->script, tscript->size);
if (err)
goto out;
if (tscript->flags & TWL4030_WRST_SCRIPT) {
err = twl4030_config_warmreset_sequence(address);
if (err)
goto out;
}
if (tscript->flags & TWL4030_WAKEUP12_SCRIPT) {
err = twl4030_config_wakeup12_sequence(address);
if (err)
goto out;
}
if (tscript->flags & TWL4030_WAKEUP3_SCRIPT) {
err = twl4030_config_wakeup3_sequence(address);
if (err)
goto out;
}
if (tscript->flags & TWL4030_SLEEP_SCRIPT)
err = twl4030_config_sleep_sequence(address);
out:
return err;
}
void __init twl4030_power_init(struct twl4030_power_data *twl4030_scripts)
{
int err = 0;
int i;
struct twl4030_resconfig *resconfig;
u8 address = twl4030_start_script_address;
err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_1,
R_PROTECT_KEY);
if (err)
goto unlock;
err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_2,
R_PROTECT_KEY);
if (err)
goto unlock;
for (i = 0; i < twl4030_scripts->num; i++) {
err = load_twl4030_script(twl4030_scripts->scripts[i], address);
if (err)
goto load;
address += twl4030_scripts->scripts[i]->size;
}
resconfig = twl4030_scripts->resource_config;
if (resconfig) {
while (resconfig->resource) {
err = twl4030_configure_resource(resconfig);
if (err)
goto resource;
resconfig++;
}
}
err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0, R_PROTECT_KEY);
if (err)
pr_err("TWL4030 Unable to relock registers\n");
return;
unlock:
if (err)
pr_err("TWL4030 Unable to unlock registers\n");
return;
load:
if (err)
pr_err("TWL4030 failed to load scripts\n");
return;
resource:
if (err)
pr_err("TWL4030 failed to configure resource\n");
return;
}

94
include/linux/i2c/twl4030.h
View file

@ -223,19 +223,28 @@ int twl4030_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes);
/* Power bus message definitions */
#define DEV_GRP_NULL 0x0
#define DEV_GRP_P1 0x1
#define DEV_GRP_P2 0x2
#define DEV_GRP_P3 0x4
/* The TWL4030/5030 splits its power-management resources (the various
* regulators, clock and reset lines) into 3 processor groups - P1, P2 and
* P3. These groups can then be configured to transition between sleep, wait-on
* and active states by sending messages to the power bus. See Section 5.4.2
* Power Resources of TWL4030 TRM
*/
#define RES_GRP_RES 0x0
#define RES_GRP_PP 0x1
#define RES_GRP_RC 0x2
/* Processor groups */
#define DEV_GRP_NULL 0x0
#define DEV_GRP_P1 0x1 /* P1: all OMAP devices */
#define DEV_GRP_P2 0x2 /* P2: all Modem devices */
#define DEV_GRP_P3 0x4 /* P3: all peripheral devices */
/* Resource groups */
#define RES_GRP_RES 0x0 /* Reserved */
#define RES_GRP_PP 0x1 /* Power providers */
#define RES_GRP_RC 0x2 /* Reset and control */
#define RES_GRP_PP_RC 0x3
#define RES_GRP_PR 0x4
#define RES_GRP_PR 0x4 /* Power references */
#define RES_GRP_PP_PR 0x5
#define RES_GRP_RC_PR 0x6
#define RES_GRP_ALL 0x7
#define RES_GRP_ALL 0x7 /* All resource groups */
#define RES_TYPE2_R0 0x0
@ -246,6 +255,41 @@ int twl4030_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes);
#define RES_STATE_SLEEP 0x8
#define RES_STATE_OFF 0x0
/* Power resources */
/* Power providers */
#define RES_VAUX1 1
#define RES_VAUX2 2
#define RES_VAUX3 3
#define RES_VAUX4 4
#define RES_VMMC1 5
#define RES_VMMC2 6
#define RES_VPLL1 7
#define RES_VPLL2 8
#define RES_VSIM 9
#define RES_VDAC 10
#define RES_VINTANA1 11
#define RES_VINTANA2 12
#define RES_VINTDIG 13
#define RES_VIO 14
#define RES_VDD1 15
#define RES_VDD2 16
#define RES_VUSB_1V5 17
#define RES_VUSB_1V8 18
#define RES_VUSB_3V1 19
#define RES_VUSBCP 20
#define RES_REGEN 21
/* Reset and control */
#define RES_NRES_PWRON 22
#define RES_CLKEN 23
#define RES_SYSEN 24
#define RES_HFCLKOUT 25
#define RES_32KCLKOUT 26
#define RES_RESET 27
/* Power Reference */
#define RES_Main_Ref 28
#define TOTAL_RESOURCES 28
/*
* Power Bus Message Format ... these can be sent individually by Linux,
* but are usually part of downloaded scripts that are run when various
@ -327,6 +371,36 @@ struct twl4030_usb_data {
enum twl4030_usb_mode usb_mode;
};
struct twl4030_ins {
u16 pmb_message;
u8 delay;
};
struct twl4030_script {
struct twl4030_ins *script;
unsigned size;
u8 flags;
#define TWL4030_WRST_SCRIPT (1<<0)
#define TWL4030_WAKEUP12_SCRIPT (1<<1)
#define TWL4030_WAKEUP3_SCRIPT (1<<2)
#define TWL4030_SLEEP_SCRIPT (1<<3)
};
struct twl4030_resconfig {
u8 resource;
u8 devgroup; /* Processor group that Power resource belongs to */
u8 type; /* Power resource addressed, 6 / broadcast message */
u8 type2; /* Power resource addressed, 3 / broadcast message */
};
struct twl4030_power_data {
struct twl4030_script **scripts;
unsigned num;
struct twl4030_resconfig *resource_config;
};
extern void twl4030_power_init(struct twl4030_power_data *triton2_scripts);
struct twl4030_platform_data {
unsigned irq_base, irq_end;
struct twl4030_bci_platform_data *bci;
@ -334,6 +408,7 @@ struct twl4030_platform_data {
struct twl4030_madc_platform_data *madc;
struct twl4030_keypad_data *keypad;
struct twl4030_usb_data *usb;
struct twl4030_power_data *power;
/* LDO regulators */
struct regulator_init_data *vdac;
@ -364,7 +439,6 @@ int twl4030_sih_setup(int module);
#define TWL4030_VAUX3_DEV_GRP 0x1F
#define TWL4030_VAUX3_DEDICATED 0x22
#if defined(CONFIG_TWL4030_BCI_BATTERY) || \
defined(CONFIG_TWL4030_BCI_BATTERY_MODULE)
extern int twl4030charger_usb_en(int enable);