/* * 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; 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) { 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; } 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; }