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linux/drivers/mfd/twl4030-power.c
Linus Torvalds e6b5be2be4 Driver core patches for 3.19-rc1 
Here's the set of driver core patches for 3.19-rc1.
 
 They are dominated by the removal of the .owner field in platform
 drivers.  They touch a lot of files, but they are "simple" changes, just
 removing a line in a structure.
 
 Other than that, a few minor driver core and debugfs changes.  There are
 some ath9k patches coming in through this tree that have been acked by
 the wireless maintainers as they relied on the debugfs changes.
 
 Everything has been in linux-next for a while.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core update from Greg KH:
 "Here's the set of driver core patches for 3.19-rc1.

  They are dominated by the removal of the .owner field in platform
  drivers.  They touch a lot of files, but they are "simple" changes,
  just removing a line in a structure.

  Other than that, a few minor driver core and debugfs changes.  There
  are some ath9k patches coming in through this tree that have been
  acked by the wireless maintainers as they relied on the debugfs
  changes.

  Everything has been in linux-next for a while"

* tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (324 commits)
  Revert "ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries"
  fs: debugfs: add forward declaration for struct device type
  firmware class: Deletion of an unnecessary check before the function call "vunmap"
  firmware loader: fix hung task warning dump
  devcoredump: provide a one-way disable function
  device: Add dev_<level>_once variants
  ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries
  ath: use seq_file api for ath9k debugfs files
  debugfs: add helper function to create device related seq_file
  drivers/base: cacheinfo: remove noisy error boot message
  Revert "core: platform: add warning if driver has no owner"
  drivers: base: support cpu cache information interface to userspace via sysfs
  drivers: base: add cpu_device_create to support per-cpu devices
  topology: replace custom attribute macros with standard DEVICE_ATTR*
  cpumask: factor out show_cpumap into separate helper function
  driver core: Fix unbalanced device reference in drivers_probe
  driver core: fix race with userland in device_add()
  sysfs/kernfs: make read requests on pre-alloc files use the buffer.
  sysfs/kernfs: allow attributes to request write buffer be pre-allocated.
  fs: sysfs: return EGBIG on write if offset is larger than file size
  ...
2014-12-14 16:10:09 -08:00

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/*
* 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/twl.h>
#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <asm/mach-types.h>
static u8 twl4030_start_script_address = 0x2b;
/* Register bits for P1, P2 and P3_SW_EVENTS */
#define PWR_STOPON_PRWON BIT(6)
#define PWR_STOPON_SYSEN BIT(5)
#define PWR_ENABLE_WARMRESET BIT(4)
#define PWR_LVL_WAKEUP BIT(3)
#define PWR_DEVACT BIT(2)
#define PWR_DEVSLP BIT(1)
#define PWR_DEVOFF BIT(0)
/* Register bits for CFG_P1_TRANSITION (also for P2 and P3) */
#define STARTON_SWBUG BIT(7) /* Start on watchdog */
#define STARTON_VBUS BIT(5) /* Start on VBUS */
#define STARTON_VBAT BIT(4) /* Start on battery insert */
#define STARTON_RTC BIT(3) /* Start on RTC */
#define STARTON_USB BIT(2) /* Start on USB host */
#define STARTON_CHG BIT(1) /* Start on charger */
#define STARTON_PWON BIT(0) /* Start on PWRON button */
#define SEQ_OFFSYNC (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 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)
/* resource configuration registers
<RESOURCE>_DEV_GRP at address 'n+0'
<RESOURCE>_TYPE at address 'n+1'
<RESOURCE>_REMAP at address 'n+2'
<RESOURCE>_DEDICATED at address 'n+3'
*/
#define DEV_GRP_OFFSET 0
#define TYPE_OFFSET 1
#define REMAP_OFFSET 2
#define DEDICATED_OFFSET 3
/* Bit positions in the registers */
/* <RESOURCE>_DEV_GRP */
#define DEV_GRP_SHIFT 5
#define DEV_GRP_MASK (7 << DEV_GRP_SHIFT)
/* <RESOURCE>_TYPE */
#define TYPE_SHIFT 0
#define TYPE_MASK (7 << TYPE_SHIFT)
#define TYPE2_SHIFT 3
#define TYPE2_MASK (3 << TYPE2_SHIFT)
/* <RESOURCE>_REMAP */
#define SLEEP_STATE_SHIFT 0
#define SLEEP_STATE_MASK (0xf << SLEEP_STATE_SHIFT)
#define OFF_STATE_SHIFT 4
#define OFF_STATE_MASK (0xf << OFF_STATE_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,
};
/*
* Usable values for .remap_sleep and .remap_off
* Based on table "5.3.3 Resource Operating modes"
*/
enum {
TWL_REMAP_OFF = 0,
TWL_REMAP_SLEEP = 8,
TWL_REMAP_ACTIVE = 9,
};
/*
* Macros to configure the PM register states for various resources.
* Note that we can make MSG_SINGULAR etc private to this driver once
* omap3 has been made DT only.
*/
#define TWL_DFLT_DELAY 2 /* typically 2 32 KiHz cycles */
#define TWL_DEV_GRP_P123 (DEV_GRP_P1 | DEV_GRP_P2 | DEV_GRP_P3)
#define TWL_RESOURCE_SET(res, state) \
{ MSG_SINGULAR(DEV_GRP_NULL, (res), (state)), TWL_DFLT_DELAY }
#define TWL_RESOURCE_ON(res) TWL_RESOURCE_SET(res, RES_STATE_ACTIVE)
#define TWL_RESOURCE_OFF(res) TWL_RESOURCE_SET(res, RES_STATE_OFF)
#define TWL_RESOURCE_RESET(res) TWL_RESOURCE_SET(res, RES_STATE_WRST)
/*
* It seems that type1 and type2 is just the resource init order
* number for the type1 and type2 group.
*/
#define TWL_RESOURCE_SET_ACTIVE(res, state) \
{ MSG_SINGULAR(DEV_GRP_NULL, (res), RES_STATE_ACTIVE), (state) }
#define TWL_RESOURCE_GROUP_RESET(group, type1, type2) \
{ MSG_BROADCAST(DEV_GRP_NULL, (group), (type1), (type2), \
RES_STATE_WRST), TWL_DFLT_DELAY }
#define TWL_RESOURCE_GROUP_SLEEP(group, type, type2) \
{ MSG_BROADCAST(DEV_GRP_NULL, (group), (type), (type2), \
RES_STATE_SLEEP), TWL_DFLT_DELAY }
#define TWL_RESOURCE_GROUP_ACTIVE(group, type, type2) \
{ MSG_BROADCAST(DEV_GRP_NULL, (group), (type), (type2), \
RES_STATE_ACTIVE), TWL_DFLT_DELAY }
#define TWL_REMAP_SLEEP(res, devgrp, typ, typ2) \
{ .resource = (res), .devgroup = (devgrp), \
.type = (typ), .type2 = (typ2), \
.remap_off = TWL_REMAP_OFF, \
.remap_sleep = TWL_REMAP_SLEEP, }
#define TWL_REMAP_OFF(res, devgrp, typ, typ2) \
{ .resource = (res), .devgroup = (devgrp), \
.type = (typ), .type2 = (typ2), \
.remap_off = TWL_REMAP_OFF, .remap_sleep = TWL_REMAP_OFF, }
static int twl4030_write_script_byte(u8 address, u8 byte)
{
int err;
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, address, R_MEMORY_ADDRESS);
if (err)
goto out;
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, byte, R_MEMORY_DATA);
out:
return err;
}
static int 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 twl4030_write_script(u8 address, struct twl4030_ins *script,
int len)
{
int err = -EINVAL;
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 twl4030_config_wakeup3_sequence(u8 address)
{
int err;
u8 data;
/* Set SLEEP to ACTIVE SEQ address for P3 */
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, address, R_SEQ_ADD_S2A3);
if (err)
goto out;
/* P3 LVL_WAKEUP should be on LEVEL */
err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &data, R_P3_SW_EVENTS);
if (err)
goto out;
data |= PWR_LVL_WAKEUP;
err = twl_i2c_write_u8(TWL_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 twl4030_config_wakeup12_sequence(u8 address)
{
int err = 0;
u8 data;
/* Set SLEEP to ACTIVE SEQ address for P1 and P2 */
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, address, R_SEQ_ADD_S2A12);
if (err)
goto out;
/* P1/P2 LVL_WAKEUP should be on LEVEL */
err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &data, R_P1_SW_EVENTS);
if (err)
goto out;
data |= PWR_LVL_WAKEUP;
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, data, R_P1_SW_EVENTS);
if (err)
goto out;
err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &data, R_P2_SW_EVENTS);
if (err)
goto out;
data |= PWR_LVL_WAKEUP;
err = twl_i2c_write_u8(TWL_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 = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &data,
R_CFG_P1_TRANSITION);
if (err)
goto out;
data &= ~(1<<1);
err = twl_i2c_write_u8(TWL_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 twl4030_config_sleep_sequence(u8 address)
{
int err;
/* Set ACTIVE to SLEEP SEQ address in T2 memory*/
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, address, R_SEQ_ADD_A2S);
if (err)
pr_err("TWL4030 sleep sequence config error\n");
return err;
}
static int twl4030_config_warmreset_sequence(u8 address)
{
int err;
u8 rd_data;
/* Set WARM RESET SEQ address for P1 */
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, address, R_SEQ_ADD_WARM);
if (err)
goto out;
/* P1/P2/P3 enable WARMRESET */
err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &rd_data, R_P1_SW_EVENTS);
if (err)
goto out;
rd_data |= PWR_ENABLE_WARMRESET;
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, rd_data, R_P1_SW_EVENTS);
if (err)
goto out;
err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &rd_data, R_P2_SW_EVENTS);
if (err)
goto out;
rd_data |= PWR_ENABLE_WARMRESET;
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, rd_data, R_P2_SW_EVENTS);
if (err)
goto out;
err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &rd_data, R_P3_SW_EVENTS);
if (err)
goto out;
rd_data |= PWR_ENABLE_WARMRESET;
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, rd_data, R_P3_SW_EVENTS);
out:
if (err)
pr_err("TWL4030 warmreset seq config error\n");
return err;
}
static int twl4030_configure_resource(struct twl4030_resconfig *rconfig)
{
int rconfig_addr;
int err;
u8 type;
u8 grp;
u8 remap;
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 = twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &grp,
rconfig_addr + DEV_GRP_OFFSET);
if (err) {
pr_err("TWL4030 Resource %d group could not be read\n",
rconfig->resource);
return err;
}
if (rconfig->devgroup != TWL4030_RESCONFIG_UNDEF) {
grp &= ~DEV_GRP_MASK;
grp |= rconfig->devgroup << DEV_GRP_SHIFT;
err = twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER,
grp, rconfig_addr + DEV_GRP_OFFSET);
if (err < 0) {
pr_err("TWL4030 failed to program devgroup\n");
return err;
}
}
/* Set resource types */
err = twl_i2c_read_u8(TWL_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 != TWL4030_RESCONFIG_UNDEF) {
type &= ~TYPE_MASK;
type |= rconfig->type << TYPE_SHIFT;
}
if (rconfig->type2 != TWL4030_RESCONFIG_UNDEF) {
type &= ~TYPE2_MASK;
type |= rconfig->type2 << TYPE2_SHIFT;
}
err = twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER,
type, rconfig_addr + TYPE_OFFSET);
if (err < 0) {
pr_err("TWL4030 failed to program resource type\n");
return err;
}
/* Set remap states */
err = twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &remap,
rconfig_addr + REMAP_OFFSET);
if (err < 0) {
pr_err("TWL4030 Resource %d remap could not be read\n",
rconfig->resource);
return err;
}
if (rconfig->remap_off != TWL4030_RESCONFIG_UNDEF) {
remap &= ~OFF_STATE_MASK;
remap |= rconfig->remap_off << OFF_STATE_SHIFT;
}
if (rconfig->remap_sleep != TWL4030_RESCONFIG_UNDEF) {
remap &= ~SLEEP_STATE_MASK;
remap |= rconfig->remap_sleep << SLEEP_STATE_SHIFT;
}
err = twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER,
remap,
rconfig_addr + REMAP_OFFSET);
if (err < 0) {
pr_err("TWL4030 failed to program remap\n");
return err;
}
return 0;
}
static int load_twl4030_script(struct twl4030_script *tscript,
u8 address)
{
int err;
static int order;
/* 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) {
/* Reset any existing sleep script to avoid hangs on reboot */
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, END_OF_SCRIPT,
R_SEQ_ADD_A2S);
if (err)
goto out;
err = twl4030_config_wakeup12_sequence(address);
if (err)
goto out;
order = 1;
}
if (tscript->flags & TWL4030_WAKEUP3_SCRIPT) {
err = twl4030_config_wakeup3_sequence(address);
if (err)
goto out;
}
if (tscript->flags & TWL4030_SLEEP_SCRIPT) {
if (!order)
pr_warning("TWL4030: Bad order of scripts (sleep "\
"script before wakeup) Leads to boot"\
"failure on some boards\n");
err = twl4030_config_sleep_sequence(address);
}
out:
return err;
}
int twl4030_remove_script(u8 flags)
{
int err = 0;
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1,
TWL4030_PM_MASTER_PROTECT_KEY);
if (err) {
pr_err("twl4030: unable to unlock PROTECT_KEY\n");
return err;
}
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG2,
TWL4030_PM_MASTER_PROTECT_KEY);
if (err) {
pr_err("twl4030: unable to unlock PROTECT_KEY\n");
return err;
}
if (flags & TWL4030_WRST_SCRIPT) {
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, END_OF_SCRIPT,
R_SEQ_ADD_WARM);
if (err)
return err;
}
if (flags & TWL4030_WAKEUP12_SCRIPT) {
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, END_OF_SCRIPT,
R_SEQ_ADD_S2A12);
if (err)
return err;
}
if (flags & TWL4030_WAKEUP3_SCRIPT) {
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, END_OF_SCRIPT,
R_SEQ_ADD_S2A3);
if (err)
return err;
}
if (flags & TWL4030_SLEEP_SCRIPT) {
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, END_OF_SCRIPT,
R_SEQ_ADD_A2S);
if (err)
return err;
}
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 0,
TWL4030_PM_MASTER_PROTECT_KEY);
if (err)
pr_err("TWL4030 Unable to relock registers\n");
return err;
}
static int
twl4030_power_configure_scripts(const struct twl4030_power_data *pdata)
{
int err;
int i;
u8 address = twl4030_start_script_address;
for (i = 0; i < pdata->num; i++) {
err = load_twl4030_script(pdata->scripts[i], address);
if (err)
return err;
address += pdata->scripts[i]->size;
}
return 0;
}
static void twl4030_patch_rconfig(struct twl4030_resconfig *common,
struct twl4030_resconfig *board)
{
while (common->resource) {
struct twl4030_resconfig *b = board;
while (b->resource) {
if (b->resource == common->resource) {
*common = *b;
break;
}
b++;
}
common++;
}
}
static int
twl4030_power_configure_resources(const struct twl4030_power_data *pdata)
{
struct twl4030_resconfig *resconfig = pdata->resource_config;
struct twl4030_resconfig *boardconf = pdata->board_config;
int err;
if (resconfig) {
if (boardconf)
twl4030_patch_rconfig(resconfig, boardconf);
while (resconfig->resource) {
err = twl4030_configure_resource(resconfig);
if (err)
return err;
resconfig++;
}
}
return 0;
}
static int twl4030_starton_mask_and_set(u8 bitmask, u8 bitvalues)
{
u8 regs[3] = { TWL4030_PM_MASTER_CFG_P1_TRANSITION,
TWL4030_PM_MASTER_CFG_P2_TRANSITION,
TWL4030_PM_MASTER_CFG_P3_TRANSITION, };
u8 val;
int i, err;
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1,
TWL4030_PM_MASTER_PROTECT_KEY);
if (err)
goto relock;
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER,
TWL4030_PM_MASTER_KEY_CFG2,
TWL4030_PM_MASTER_PROTECT_KEY);
if (err)
goto relock;
for (i = 0; i < sizeof(regs); i++) {
err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER,
&val, regs[i]);
if (err)
break;
val = (~bitmask & val) | (bitmask & bitvalues);
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER,
val, regs[i]);
if (err)
break;
}
if (err)
pr_err("TWL4030 Register access failed: %i\n", err);
relock:
return twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 0,
TWL4030_PM_MASTER_PROTECT_KEY);
}
/*
* In master mode, start the power off sequence.
* After a successful execution, TWL shuts down the power to the SoC
* and all peripherals connected to it.
*/
void twl4030_power_off(void)
{
int err;
/* Disable start on charger or VBUS as it can break poweroff */
err = twl4030_starton_mask_and_set(STARTON_VBUS | STARTON_CHG, 0);
if (err)
pr_err("TWL4030 Unable to configure start-up\n");
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, PWR_DEVOFF,
TWL4030_PM_MASTER_P1_SW_EVENTS);
if (err)
pr_err("TWL4030 Unable to power off\n");
}
static bool twl4030_power_use_poweroff(const struct twl4030_power_data *pdata,
struct device_node *node)
{
if (pdata && pdata->use_poweroff)
return true;
if (of_property_read_bool(node, "ti,system-power-controller"))
return true;
if (of_property_read_bool(node, "ti,use_poweroff"))
return true;
return false;
}
#ifdef CONFIG_OF
/* Generic warm reset configuration for omap3 */
static struct twl4030_ins omap3_wrst_seq[] = {
TWL_RESOURCE_OFF(RES_NRES_PWRON),
TWL_RESOURCE_OFF(RES_RESET),
TWL_RESOURCE_RESET(RES_MAIN_REF),
TWL_RESOURCE_GROUP_RESET(RES_GRP_ALL, RES_TYPE_R0, RES_TYPE2_R2),
TWL_RESOURCE_RESET(RES_VUSB_3V1),
TWL_RESOURCE_GROUP_RESET(RES_GRP_ALL, RES_TYPE_R0, RES_TYPE2_R1),
TWL_RESOURCE_GROUP_RESET(RES_GRP_RC, RES_TYPE_ALL, RES_TYPE2_R0),
TWL_RESOURCE_ON(RES_RESET),
TWL_RESOURCE_ON(RES_NRES_PWRON),
};
static struct twl4030_script omap3_wrst_script = {
.script = omap3_wrst_seq,
.size = ARRAY_SIZE(omap3_wrst_seq),
.flags = TWL4030_WRST_SCRIPT,
};
static struct twl4030_script *omap3_reset_scripts[] = {
&omap3_wrst_script,
};
static struct twl4030_resconfig omap3_rconfig[] = {
TWL_REMAP_SLEEP(RES_HFCLKOUT, DEV_GRP_P3, -1, -1),
TWL_REMAP_SLEEP(RES_VDD1, DEV_GRP_P1, -1, -1),
TWL_REMAP_SLEEP(RES_VDD2, DEV_GRP_P1, -1, -1),
{ 0, 0 },
};
static struct twl4030_power_data omap3_reset = {
.scripts = omap3_reset_scripts,
.num = ARRAY_SIZE(omap3_reset_scripts),
.resource_config = omap3_rconfig,
};
/* Recommended generic default idle configuration for off-idle */
/* Broadcast message to put res to sleep */
static struct twl4030_ins omap3_idle_sleep_on_seq[] = {
TWL_RESOURCE_GROUP_SLEEP(RES_GRP_ALL, RES_TYPE_ALL, 0),
};
static struct twl4030_script omap3_idle_sleep_on_script = {
.script = omap3_idle_sleep_on_seq,
.size = ARRAY_SIZE(omap3_idle_sleep_on_seq),
.flags = TWL4030_SLEEP_SCRIPT,
};
/* Broadcast message to put res to active */
static struct twl4030_ins omap3_idle_wakeup_p12_seq[] = {
TWL_RESOURCE_GROUP_ACTIVE(RES_GRP_ALL, RES_TYPE_ALL, 0),
};
static struct twl4030_script omap3_idle_wakeup_p12_script = {
.script = omap3_idle_wakeup_p12_seq,
.size = ARRAY_SIZE(omap3_idle_wakeup_p12_seq),
.flags = TWL4030_WAKEUP12_SCRIPT,
};
/* Broadcast message to put res to active */
static struct twl4030_ins omap3_idle_wakeup_p3_seq[] = {
TWL_RESOURCE_SET_ACTIVE(RES_CLKEN, 0x37),
TWL_RESOURCE_GROUP_ACTIVE(RES_GRP_ALL, RES_TYPE_ALL, 0),
};
static struct twl4030_script omap3_idle_wakeup_p3_script = {
.script = omap3_idle_wakeup_p3_seq,
.size = ARRAY_SIZE(omap3_idle_wakeup_p3_seq),
.flags = TWL4030_WAKEUP3_SCRIPT,
};
static struct twl4030_script *omap3_idle_scripts[] = {
&omap3_idle_wakeup_p12_script,
&omap3_idle_wakeup_p3_script,
&omap3_wrst_script,
&omap3_idle_sleep_on_script,
};
/*
* Recommended configuration based on "Recommended Sleep
* Sequences for the Zoom Platform":
* http://omappedia.com/wiki/File:Recommended_Sleep_Sequences_Zoom.pdf
* Note that the type1 and type2 seem to be just the init order number
* for type1 and type2 groups as specified in the document mentioned
* above.
*/
static struct twl4030_resconfig omap3_idle_rconfig[] = {
TWL_REMAP_SLEEP(RES_VAUX1, TWL4030_RESCONFIG_UNDEF, 0, 0),
TWL_REMAP_SLEEP(RES_VAUX2, TWL4030_RESCONFIG_UNDEF, 0, 0),
TWL_REMAP_SLEEP(RES_VAUX3, TWL4030_RESCONFIG_UNDEF, 0, 0),
TWL_REMAP_SLEEP(RES_VAUX4, TWL4030_RESCONFIG_UNDEF, 0, 0),
TWL_REMAP_SLEEP(RES_VMMC1, TWL4030_RESCONFIG_UNDEF, 0, 0),
TWL_REMAP_SLEEP(RES_VMMC2, TWL4030_RESCONFIG_UNDEF, 0, 0),
TWL_REMAP_OFF(RES_VPLL1, DEV_GRP_P1, 3, 1),
TWL_REMAP_SLEEP(RES_VPLL2, DEV_GRP_P1, 0, 0),
TWL_REMAP_SLEEP(RES_VSIM, TWL4030_RESCONFIG_UNDEF, 0, 0),
TWL_REMAP_SLEEP(RES_VDAC, TWL4030_RESCONFIG_UNDEF, 0, 0),
TWL_REMAP_SLEEP(RES_VINTANA1, TWL_DEV_GRP_P123, 1, 2),
TWL_REMAP_SLEEP(RES_VINTANA2, TWL_DEV_GRP_P123, 0, 2),
TWL_REMAP_SLEEP(RES_VINTDIG, TWL_DEV_GRP_P123, 1, 2),
TWL_REMAP_SLEEP(RES_VIO, TWL_DEV_GRP_P123, 2, 2),
TWL_REMAP_OFF(RES_VDD1, DEV_GRP_P1, 4, 1),
TWL_REMAP_OFF(RES_VDD2, DEV_GRP_P1, 3, 1),
TWL_REMAP_SLEEP(RES_VUSB_1V5, TWL4030_RESCONFIG_UNDEF, 0, 0),
TWL_REMAP_SLEEP(RES_VUSB_1V8, TWL4030_RESCONFIG_UNDEF, 0, 0),
TWL_REMAP_SLEEP(RES_VUSB_3V1, TWL_DEV_GRP_P123, 0, 0),
/* Resource #20 USB charge pump skipped */
TWL_REMAP_SLEEP(RES_REGEN, TWL_DEV_GRP_P123, 2, 1),
TWL_REMAP_SLEEP(RES_NRES_PWRON, TWL_DEV_GRP_P123, 0, 1),
TWL_REMAP_SLEEP(RES_CLKEN, TWL_DEV_GRP_P123, 3, 2),
TWL_REMAP_SLEEP(RES_SYSEN, TWL_DEV_GRP_P123, 6, 1),
TWL_REMAP_SLEEP(RES_HFCLKOUT, DEV_GRP_P3, 0, 2),
TWL_REMAP_SLEEP(RES_32KCLKOUT, TWL_DEV_GRP_P123, 0, 0),
TWL_REMAP_SLEEP(RES_RESET, TWL_DEV_GRP_P123, 6, 0),
TWL_REMAP_SLEEP(RES_MAIN_REF, TWL_DEV_GRP_P123, 0, 0),
{ /* Terminator */ },
};
static struct twl4030_power_data omap3_idle = {
.scripts = omap3_idle_scripts,
.num = ARRAY_SIZE(omap3_idle_scripts),
.resource_config = omap3_idle_rconfig,
};
/* Disable 32 KiHz oscillator during idle */
static struct twl4030_resconfig osc_off_rconfig[] = {
TWL_REMAP_OFF(RES_CLKEN, DEV_GRP_P1 | DEV_GRP_P3, 3, 2),
{ /* Terminator */ },
};
static struct twl4030_power_data osc_off_idle = {
.scripts = omap3_idle_scripts,
.num = ARRAY_SIZE(omap3_idle_scripts),
.resource_config = omap3_idle_rconfig,
.board_config = osc_off_rconfig,
};
static struct of_device_id twl4030_power_of_match[] = {
{
.compatible = "ti,twl4030-power",
},
{
.compatible = "ti,twl4030-power-reset",
.data = &omap3_reset,
},
{
.compatible = "ti,twl4030-power-idle",
.data = &omap3_idle,
},
{
.compatible = "ti,twl4030-power-idle-osc-off",
.data = &osc_off_idle,
},
{ },
};
MODULE_DEVICE_TABLE(of, twl4030_power_of_match);
#endif /* CONFIG_OF */
static int twl4030_power_probe(struct platform_device *pdev)
{
const struct twl4030_power_data *pdata = dev_get_platdata(&pdev->dev);
struct device_node *node = pdev->dev.of_node;
const struct of_device_id *match;
int err = 0;
int err2 = 0;
u8 val;
if (!pdata && !node) {
dev_err(&pdev->dev, "Platform data is missing\n");
return -EINVAL;
}
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1,
TWL4030_PM_MASTER_PROTECT_KEY);
err |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER,
TWL4030_PM_MASTER_KEY_CFG2,
TWL4030_PM_MASTER_PROTECT_KEY);
if (err) {
pr_err("TWL4030 Unable to unlock registers\n");
return err;
}
match = of_match_device(of_match_ptr(twl4030_power_of_match),
&pdev->dev);
if (match && match->data)
pdata = match->data;
if (pdata) {
err = twl4030_power_configure_scripts(pdata);
if (err) {
pr_err("TWL4030 failed to load scripts\n");
goto relock;
}
err = twl4030_power_configure_resources(pdata);
if (err) {
pr_err("TWL4030 failed to configure resource\n");
goto relock;
}
}
/* Board has to be wired properly to use this feature */
if (twl4030_power_use_poweroff(pdata, node) && !pm_power_off) {
/* Default for SEQ_OFFSYNC is set, lets ensure this */
err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &val,
TWL4030_PM_MASTER_CFG_P123_TRANSITION);
if (err) {
pr_warning("TWL4030 Unable to read registers\n");
} else if (!(val & SEQ_OFFSYNC)) {
val |= SEQ_OFFSYNC;
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, val,
TWL4030_PM_MASTER_CFG_P123_TRANSITION);
if (err) {
pr_err("TWL4030 Unable to setup SEQ_OFFSYNC\n");
goto relock;
}
}
pm_power_off = twl4030_power_off;
}
relock:
err2 = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 0,
TWL4030_PM_MASTER_PROTECT_KEY);
if (err2) {
pr_err("TWL4030 Unable to relock registers\n");
return err2;
}
return err;
}
static int twl4030_power_remove(struct platform_device *pdev)
{
return 0;
}
static struct platform_driver twl4030_power_driver = {
.driver = {
.name = "twl4030_power",
.of_match_table = of_match_ptr(twl4030_power_of_match),
},
.probe = twl4030_power_probe,
.remove = twl4030_power_remove,
};
module_platform_driver(twl4030_power_driver);
MODULE_AUTHOR("Nokia Corporation");
MODULE_AUTHOR("Texas Instruments, Inc.");
MODULE_DESCRIPTION("Power management for TWL4030");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:twl4030_power");
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