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authorLinus Torvalds <torvalds@linux-foundation.org>2011-05-25 18:35:03 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2011-05-25 18:35:03 -0400
commitad363e0916423b2e6cdfcdc30ae707ec709f0a65 (patch)
treec47cc9062f7adc0ceb27f634b63b8548b733f01c /drivers/mfd
parented0795aa12129df9f3d2cc81ee579a9e54e12885 (diff)
parent1032fbfd792f2b384ac16a63993b8fae5eea9083 (diff)
Merge branch 'for-torvalds' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-stericsson
* 'for-torvalds' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-stericsson: mach-ux500: voltage domain regulators for DB8500 cpufreq: make DB8500 cpufreq driver compile cpufreq: update DB8500 cpufreq driver mach-ux500: move CPUfreq driver to cpufreq subsystem mfd: add DB5500 PRCMU driver mfd: update DB8500 PRCMU driver mach-ux500: move the DB8500 PRCMU driver to MFD mach-ux500: make PRCMU base address dynamic mach-ux500: rename PRCMU driver per SoC mach-ux500: update ASIC version detection mach-ux500: update SoC and board IRQ handling mach-ux500: update the DB5500 register file mach-ux500: update the DB8500 register file
Diffstat (limited to 'drivers/mfd')
-rw-r--r--drivers/mfd/Kconfig22
-rw-r--r--drivers/mfd/Makefile5
-rw-r--r--drivers/mfd/ab8500-i2c.c3
-rw-r--r--drivers/mfd/db5500-prcmu-regs.h115
-rw-r--r--drivers/mfd/db5500-prcmu.c448
-rw-r--r--drivers/mfd/db8500-prcmu-regs.h166
-rw-r--r--drivers/mfd/db8500-prcmu.c2069
7 files changed, 2824 insertions, 4 deletions
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 3ed3ff06be5d..481770ab2716 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -538,7 +538,7 @@ config AB8500_CORE
538 538
539config AB8500_I2C_CORE 539config AB8500_I2C_CORE
540 bool "AB8500 register access via PRCMU I2C" 540 bool "AB8500 register access via PRCMU I2C"
541 depends on AB8500_CORE && UX500_SOC_DB8500 541 depends on AB8500_CORE && MFD_DB8500_PRCMU
542 default y 542 default y
543 help 543 help
544 This enables register access to the AB8500 chip via PRCMU I2C. 544 This enables register access to the AB8500 chip via PRCMU I2C.
@@ -575,6 +575,26 @@ config AB3550_CORE
575 LEDs, vibrator, system power and temperature, power management 575 LEDs, vibrator, system power and temperature, power management
576 and ALSA sound. 576 and ALSA sound.
577 577
578config MFD_DB8500_PRCMU
579 bool "ST-Ericsson DB8500 Power Reset Control Management Unit"
580 depends on UX500_SOC_DB8500
581 select MFD_CORE
582 help
583 Select this option to enable support for the DB8500 Power Reset
584 and Control Management Unit. This is basically an autonomous
585 system controller running an XP70 microprocessor, which is accessed
586 through a register map.
587
588config MFD_DB5500_PRCMU
589 bool "ST-Ericsson DB5500 Power Reset Control Management Unit"
590 depends on UX500_SOC_DB5500
591 select MFD_CORE
592 help
593 Select this option to enable support for the DB5500 Power Reset
594 and Control Management Unit. This is basically an autonomous
595 system controller running an XP70 microprocessor, which is accessed
596 through a register map.
597
578config MFD_CS5535 598config MFD_CS5535
579 tristate "Support for CS5535 and CS5536 southbridge core functions" 599 tristate "Support for CS5535 and CS5536 southbridge core functions"
580 select MFD_CORE 600 select MFD_CORE
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 419caa9d7dcf..24aa44448daf 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -74,9 +74,12 @@ obj-$(CONFIG_AB3100_CORE) += ab3100-core.o
74obj-$(CONFIG_AB3100_OTP) += ab3100-otp.o 74obj-$(CONFIG_AB3100_OTP) += ab3100-otp.o
75obj-$(CONFIG_AB3550_CORE) += ab3550-core.o 75obj-$(CONFIG_AB3550_CORE) += ab3550-core.o
76obj-$(CONFIG_AB8500_CORE) += ab8500-core.o ab8500-sysctrl.o 76obj-$(CONFIG_AB8500_CORE) += ab8500-core.o ab8500-sysctrl.o
77obj-$(CONFIG_AB8500_I2C_CORE) += ab8500-i2c.o
78obj-$(CONFIG_AB8500_DEBUG) += ab8500-debugfs.o 77obj-$(CONFIG_AB8500_DEBUG) += ab8500-debugfs.o
79obj-$(CONFIG_AB8500_GPADC) += ab8500-gpadc.o 78obj-$(CONFIG_AB8500_GPADC) += ab8500-gpadc.o
79obj-$(CONFIG_MFD_DB8500_PRCMU) += db8500-prcmu.o
80# ab8500-i2c need to come after db8500-prcmu (which provides the channel)
81obj-$(CONFIG_AB8500_I2C_CORE) += ab8500-i2c.o
82obj-$(CONFIG_MFD_DB5500_PRCMU) += db5500-prcmu.o
80obj-$(CONFIG_MFD_TIMBERDALE) += timberdale.o 83obj-$(CONFIG_MFD_TIMBERDALE) += timberdale.o
81obj-$(CONFIG_PMIC_ADP5520) += adp5520.o 84obj-$(CONFIG_PMIC_ADP5520) += adp5520.o
82obj-$(CONFIG_LPC_SCH) += lpc_sch.o 85obj-$(CONFIG_LPC_SCH) += lpc_sch.o
diff --git a/drivers/mfd/ab8500-i2c.c b/drivers/mfd/ab8500-i2c.c
index 821e6b86afd2..9be541c6b004 100644
--- a/drivers/mfd/ab8500-i2c.c
+++ b/drivers/mfd/ab8500-i2c.c
@@ -11,8 +11,7 @@
11#include <linux/module.h> 11#include <linux/module.h>
12#include <linux/platform_device.h> 12#include <linux/platform_device.h>
13#include <linux/mfd/ab8500.h> 13#include <linux/mfd/ab8500.h>
14 14#include <linux/mfd/db8500-prcmu.h>
15#include <mach/prcmu.h>
16 15
17static int ab8500_i2c_write(struct ab8500 *ab8500, u16 addr, u8 data) 16static int ab8500_i2c_write(struct ab8500 *ab8500, u16 addr, u8 data)
18{ 17{
diff --git a/drivers/mfd/db5500-prcmu-regs.h b/drivers/mfd/db5500-prcmu-regs.h
new file mode 100644
index 000000000000..9a8e9e4ddd33
--- /dev/null
+++ b/drivers/mfd/db5500-prcmu-regs.h
@@ -0,0 +1,115 @@
1/*
2 * Copyright (C) STMicroelectronics 2009
3 * Copyright (C) ST-Ericsson SA 2010
4 *
5 * Author: Kumar Sanghvi <kumar.sanghvi@stericsson.com>
6 * Author: Sundar Iyer <sundar.iyer@stericsson.com>
7 *
8 * License Terms: GNU General Public License v2
9 *
10 * PRCM Unit registers
11 */
12
13#ifndef __MACH_PRCMU_REGS_H
14#define __MACH_PRCMU_REGS_H
15
16#include <mach/hardware.h>
17
18#define PRCM_ARM_PLLDIVPS (_PRCMU_BASE + 0x118)
19#define PRCM_ARM_PLLDIVPS_ARM_BRM_RATE 0x3f
20#define PRCM_ARM_PLLDIVPS_MAX_MASK 0xf
21
22#define PRCM_PLLARM_LOCKP (_PRCMU_BASE + 0x0a8)
23#define PRCM_PLLARM_LOCKP_PRCM_PLLARM_LOCKP3 0x2
24
25#define PRCM_ARM_CHGCLKREQ (_PRCMU_BASE + 0x114)
26#define PRCM_ARM_CHGCLKREQ_PRCM_ARM_CHGCLKREQ 0x1
27
28#define PRCM_PLLARM_ENABLE (_PRCMU_BASE + 0x98)
29#define PRCM_PLLARM_ENABLE_PRCM_PLLARM_ENABLE 0x1
30#define PRCM_PLLARM_ENABLE_PRCM_PLLARM_COUNTON 0x100
31
32#define PRCM_ARMCLKFIX_MGT (_PRCMU_BASE + 0x0)
33#define PRCM_A9_RESETN_CLR (_PRCMU_BASE + 0x1f4)
34#define PRCM_A9_RESETN_SET (_PRCMU_BASE + 0x1f0)
35#define PRCM_ARM_LS_CLAMP (_PRCMU_BASE + 0x30c)
36#define PRCM_SRAM_A9 (_PRCMU_BASE + 0x308)
37
38/* ARM WFI Standby signal register */
39#define PRCM_ARM_WFI_STANDBY (_PRCMU_BASE + 0x130)
40#define PRCM_IOCR (_PRCMU_BASE + 0x310)
41#define PRCM_IOCR_IOFORCE 0x1
42
43/* CPU mailbox registers */
44#define PRCM_MBOX_CPU_VAL (_PRCMU_BASE + 0x0fc)
45#define PRCM_MBOX_CPU_SET (_PRCMU_BASE + 0x100)
46#define PRCM_MBOX_CPU_CLR (_PRCMU_BASE + 0x104)
47
48/* Dual A9 core interrupt management unit registers */
49#define PRCM_A9_MASK_REQ (_PRCMU_BASE + 0x328)
50#define PRCM_A9_MASK_REQ_PRCM_A9_MASK_REQ 0x1
51
52#define PRCM_A9_MASK_ACK (_PRCMU_BASE + 0x32c)
53#define PRCM_ARMITMSK31TO0 (_PRCMU_BASE + 0x11c)
54#define PRCM_ARMITMSK63TO32 (_PRCMU_BASE + 0x120)
55#define PRCM_ARMITMSK95TO64 (_PRCMU_BASE + 0x124)
56#define PRCM_ARMITMSK127TO96 (_PRCMU_BASE + 0x128)
57#define PRCM_POWER_STATE_VAL (_PRCMU_BASE + 0x25C)
58#define PRCM_ARMITVAL31TO0 (_PRCMU_BASE + 0x260)
59#define PRCM_ARMITVAL63TO32 (_PRCMU_BASE + 0x264)
60#define PRCM_ARMITVAL95TO64 (_PRCMU_BASE + 0x268)
61#define PRCM_ARMITVAL127TO96 (_PRCMU_BASE + 0x26C)
62
63#define PRCM_HOSTACCESS_REQ (_PRCMU_BASE + 0x334)
64#define ARM_WAKEUP_MODEM 0x1
65
66#define PRCM_ARM_IT1_CLEAR (_PRCMU_BASE + 0x48C)
67#define PRCM_ARM_IT1_VAL (_PRCMU_BASE + 0x494)
68#define PRCM_HOLD_EVT (_PRCMU_BASE + 0x174)
69
70#define PRCM_ITSTATUS0 (_PRCMU_BASE + 0x148)
71#define PRCM_ITSTATUS1 (_PRCMU_BASE + 0x150)
72#define PRCM_ITSTATUS2 (_PRCMU_BASE + 0x158)
73#define PRCM_ITSTATUS3 (_PRCMU_BASE + 0x160)
74#define PRCM_ITSTATUS4 (_PRCMU_BASE + 0x168)
75#define PRCM_ITSTATUS5 (_PRCMU_BASE + 0x484)
76#define PRCM_ITCLEAR5 (_PRCMU_BASE + 0x488)
77#define PRCM_ARMIT_MASKXP70_IT (_PRCMU_BASE + 0x1018)
78
79/* System reset register */
80#define PRCM_APE_SOFTRST (_PRCMU_BASE + 0x228)
81
82/* Level shifter and clamp control registers */
83#define PRCM_MMIP_LS_CLAMP_SET (_PRCMU_BASE + 0x420)
84#define PRCM_MMIP_LS_CLAMP_CLR (_PRCMU_BASE + 0x424)
85
86/* PRCMU clock/PLL/reset registers */
87#define PRCM_PLLDSI_FREQ (_PRCMU_BASE + 0x500)
88#define PRCM_PLLDSI_ENABLE (_PRCMU_BASE + 0x504)
89#define PRCM_PLLDSI_LOCKP (_PRCMU_BASE + 0x508)
90#define PRCM_LCDCLK_MGT (_PRCMU_BASE + 0x044)
91#define PRCM_MCDECLK_MGT (_PRCMU_BASE + 0x064)
92#define PRCM_HDMICLK_MGT (_PRCMU_BASE + 0x058)
93#define PRCM_TVCLK_MGT (_PRCMU_BASE + 0x07c)
94#define PRCM_DSI_PLLOUT_SEL (_PRCMU_BASE + 0x530)
95#define PRCM_DSITVCLK_DIV (_PRCMU_BASE + 0x52C)
96#define PRCM_PLLDSI_LOCKP (_PRCMU_BASE + 0x508)
97#define PRCM_APE_RESETN_SET (_PRCMU_BASE + 0x1E4)
98#define PRCM_APE_RESETN_CLR (_PRCMU_BASE + 0x1E8)
99#define PRCM_CLKOCR (_PRCMU_BASE + 0x1CC)
100
101/* ePOD and memory power signal control registers */
102#define PRCM_EPOD_C_SET (_PRCMU_BASE + 0x410)
103#define PRCM_SRAM_LS_SLEEP (_PRCMU_BASE + 0x304)
104
105/* Debug power control unit registers */
106#define PRCM_POWER_STATE_SET (_PRCMU_BASE + 0x254)
107
108/* Miscellaneous unit registers */
109#define PRCM_DSI_SW_RESET (_PRCMU_BASE + 0x324)
110#define PRCM_GPIOCR (_PRCMU_BASE + 0x138)
111#define PRCM_GPIOCR_DBG_STM_MOD_CMD1 0x800
112#define PRCM_GPIOCR_DBG_UARTMOD_CMD0 0x1
113
114
115#endif /* __MACH_PRCMU__REGS_H */
diff --git a/drivers/mfd/db5500-prcmu.c b/drivers/mfd/db5500-prcmu.c
new file mode 100644
index 000000000000..9dbb3cab4a6f
--- /dev/null
+++ b/drivers/mfd/db5500-prcmu.c
@@ -0,0 +1,448 @@
1/*
2 * Copyright (C) ST-Ericsson SA 2010
3 *
4 * License Terms: GNU General Public License v2
5 * Author: Mattias Nilsson <mattias.i.nilsson@stericsson.com>
6 *
7 * U5500 PRCM Unit interface driver
8 */
9#include <linux/module.h>
10#include <linux/kernel.h>
11#include <linux/delay.h>
12#include <linux/errno.h>
13#include <linux/err.h>
14#include <linux/spinlock.h>
15#include <linux/io.h>
16#include <linux/slab.h>
17#include <linux/mutex.h>
18#include <linux/completion.h>
19#include <linux/irq.h>
20#include <linux/jiffies.h>
21#include <linux/bitops.h>
22#include <linux/interrupt.h>
23#include <linux/mfd/db5500-prcmu.h>
24#include <mach/hardware.h>
25#include <mach/irqs.h>
26#include <mach/db5500-regs.h>
27#include "db5500-prcmu-regs.h"
28
29#define _PRCM_MB_HEADER (tcdm_base + 0xFE8)
30#define PRCM_REQ_MB0_HEADER (_PRCM_MB_HEADER + 0x0)
31#define PRCM_REQ_MB1_HEADER (_PRCM_MB_HEADER + 0x1)
32#define PRCM_REQ_MB2_HEADER (_PRCM_MB_HEADER + 0x2)
33#define PRCM_REQ_MB3_HEADER (_PRCM_MB_HEADER + 0x3)
34#define PRCM_REQ_MB4_HEADER (_PRCM_MB_HEADER + 0x4)
35#define PRCM_REQ_MB5_HEADER (_PRCM_MB_HEADER + 0x5)
36#define PRCM_REQ_MB6_HEADER (_PRCM_MB_HEADER + 0x6)
37#define PRCM_REQ_MB7_HEADER (_PRCM_MB_HEADER + 0x7)
38#define PRCM_ACK_MB0_HEADER (_PRCM_MB_HEADER + 0x8)
39#define PRCM_ACK_MB1_HEADER (_PRCM_MB_HEADER + 0x9)
40#define PRCM_ACK_MB2_HEADER (_PRCM_MB_HEADER + 0xa)
41#define PRCM_ACK_MB3_HEADER (_PRCM_MB_HEADER + 0xb)
42#define PRCM_ACK_MB4_HEADER (_PRCM_MB_HEADER + 0xc)
43#define PRCM_ACK_MB5_HEADER (_PRCM_MB_HEADER + 0xd)
44#define PRCM_ACK_MB6_HEADER (_PRCM_MB_HEADER + 0xe)
45#define PRCM_ACK_MB7_HEADER (_PRCM_MB_HEADER + 0xf)
46
47/* Req Mailboxes */
48#define PRCM_REQ_MB0 (tcdm_base + 0xFD8)
49#define PRCM_REQ_MB1 (tcdm_base + 0xFCC)
50#define PRCM_REQ_MB2 (tcdm_base + 0xFC4)
51#define PRCM_REQ_MB3 (tcdm_base + 0xFC0)
52#define PRCM_REQ_MB4 (tcdm_base + 0xF98)
53#define PRCM_REQ_MB5 (tcdm_base + 0xF90)
54#define PRCM_REQ_MB6 (tcdm_base + 0xF8C)
55#define PRCM_REQ_MB7 (tcdm_base + 0xF84)
56
57/* Ack Mailboxes */
58#define PRCM_ACK_MB0 (tcdm_base + 0xF38)
59#define PRCM_ACK_MB1 (tcdm_base + 0xF30)
60#define PRCM_ACK_MB2 (tcdm_base + 0xF24)
61#define PRCM_ACK_MB3 (tcdm_base + 0xF20)
62#define PRCM_ACK_MB4 (tcdm_base + 0xF1C)
63#define PRCM_ACK_MB5 (tcdm_base + 0xF14)
64#define PRCM_ACK_MB6 (tcdm_base + 0xF0C)
65#define PRCM_ACK_MB7 (tcdm_base + 0xF08)
66
67enum mb_return_code {
68 RC_SUCCESS,
69 RC_FAIL,
70};
71
72/* Mailbox 0 headers. */
73enum mb0_header {
74 /* request */
75 RMB0H_PWR_STATE_TRANS = 1,
76 RMB0H_WAKE_UP_CFG,
77 RMB0H_RD_WAKE_UP_ACK,
78 /* acknowledge */
79 AMB0H_WAKE_UP = 1,
80};
81
82/* Mailbox 5 headers. */
83enum mb5_header {
84 MB5H_I2C_WRITE = 1,
85 MB5H_I2C_READ,
86};
87
88/* Request mailbox 5 fields. */
89#define PRCM_REQ_MB5_I2C_SLAVE (PRCM_REQ_MB5 + 0)
90#define PRCM_REQ_MB5_I2C_REG (PRCM_REQ_MB5 + 1)
91#define PRCM_REQ_MB5_I2C_SIZE (PRCM_REQ_MB5 + 2)
92#define PRCM_REQ_MB5_I2C_DATA (PRCM_REQ_MB5 + 4)
93
94/* Acknowledge mailbox 5 fields. */
95#define PRCM_ACK_MB5_RETURN_CODE (PRCM_ACK_MB5 + 0)
96#define PRCM_ACK_MB5_I2C_DATA (PRCM_ACK_MB5 + 4)
97
98#define NUM_MB 8
99#define MBOX_BIT BIT
100#define ALL_MBOX_BITS (MBOX_BIT(NUM_MB) - 1)
101
102/*
103* Used by MCDE to setup all necessary PRCMU registers
104*/
105#define PRCMU_RESET_DSIPLL 0x00004000
106#define PRCMU_UNCLAMP_DSIPLL 0x00400800
107
108/* HDMI CLK MGT PLLSW=001 (PLLSOC0), PLLDIV=0x8, = 50 Mhz*/
109#define PRCMU_DSI_CLOCK_SETTING 0x00000128
110/* TVCLK_MGT PLLSW=001 (PLLSOC0) PLLDIV=0x13, = 19.05 MHZ */
111#define PRCMU_DSI_LP_CLOCK_SETTING 0x00000135
112#define PRCMU_PLLDSI_FREQ_SETTING 0x0004013C
113#define PRCMU_DSI_PLLOUT_SEL_SETTING 0x00000002
114#define PRCMU_ENABLE_ESCAPE_CLOCK_DIV 0x03000101
115#define PRCMU_DISABLE_ESCAPE_CLOCK_DIV 0x00000101
116
117#define PRCMU_ENABLE_PLLDSI 0x00000001
118#define PRCMU_DISABLE_PLLDSI 0x00000000
119
120#define PRCMU_DSI_RESET_SW 0x00000003
121
122#define PRCMU_PLLDSI_LOCKP_LOCKED 0x3
123
124/*
125 * mb0_transfer - state needed for mailbox 0 communication.
126 * @lock: The transaction lock.
127 */
128static struct {
129 spinlock_t lock;
130} mb0_transfer;
131
132/*
133 * mb5_transfer - state needed for mailbox 5 communication.
134 * @lock: The transaction lock.
135 * @work: The transaction completion structure.
136 * @ack: Reply ("acknowledge") data.
137 */
138static struct {
139 struct mutex lock;
140 struct completion work;
141 struct {
142 u8 header;
143 u8 status;
144 u8 value[4];
145 } ack;
146} mb5_transfer;
147
148/* PRCMU TCDM base IO address. */
149static __iomem void *tcdm_base;
150
151/**
152 * db5500_prcmu_abb_read() - Read register value(s) from the ABB.
153 * @slave: The I2C slave address.
154 * @reg: The (start) register address.
155 * @value: The read out value(s).
156 * @size: The number of registers to read.
157 *
158 * Reads register value(s) from the ABB.
159 * @size has to be <= 4.
160 */
161int db5500_prcmu_abb_read(u8 slave, u8 reg, u8 *value, u8 size)
162{
163 int r;
164
165 if ((size < 1) || (4 < size))
166 return -EINVAL;
167
168 mutex_lock(&mb5_transfer.lock);
169
170 while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(5))
171 cpu_relax();
172 writeb(slave, PRCM_REQ_MB5_I2C_SLAVE);
173 writeb(reg, PRCM_REQ_MB5_I2C_REG);
174 writeb(size, PRCM_REQ_MB5_I2C_SIZE);
175 writeb(MB5H_I2C_READ, PRCM_REQ_MB5_HEADER);
176
177 writel(MBOX_BIT(5), PRCM_MBOX_CPU_SET);
178 wait_for_completion(&mb5_transfer.work);
179
180 r = 0;
181 if ((mb5_transfer.ack.header == MB5H_I2C_READ) &&
182 (mb5_transfer.ack.status == RC_SUCCESS))
183 memcpy(value, mb5_transfer.ack.value, (size_t)size);
184 else
185 r = -EIO;
186
187 mutex_unlock(&mb5_transfer.lock);
188
189 return r;
190}
191
192/**
193 * db5500_prcmu_abb_write() - Write register value(s) to the ABB.
194 * @slave: The I2C slave address.
195 * @reg: The (start) register address.
196 * @value: The value(s) to write.
197 * @size: The number of registers to write.
198 *
199 * Writes register value(s) to the ABB.
200 * @size has to be <= 4.
201 */
202int db5500_prcmu_abb_write(u8 slave, u8 reg, u8 *value, u8 size)
203{
204 int r;
205
206 if ((size < 1) || (4 < size))
207 return -EINVAL;
208
209 mutex_lock(&mb5_transfer.lock);
210
211 while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(5))
212 cpu_relax();
213 writeb(slave, PRCM_REQ_MB5_I2C_SLAVE);
214 writeb(reg, PRCM_REQ_MB5_I2C_REG);
215 writeb(size, PRCM_REQ_MB5_I2C_SIZE);
216 memcpy_toio(PRCM_REQ_MB5_I2C_DATA, value, size);
217 writeb(MB5H_I2C_WRITE, PRCM_REQ_MB5_HEADER);
218
219 writel(MBOX_BIT(5), PRCM_MBOX_CPU_SET);
220 wait_for_completion(&mb5_transfer.work);
221
222 if ((mb5_transfer.ack.header == MB5H_I2C_WRITE) &&
223 (mb5_transfer.ack.status == RC_SUCCESS))
224 r = 0;
225 else
226 r = -EIO;
227
228 mutex_unlock(&mb5_transfer.lock);
229
230 return r;
231}
232
233int db5500_prcmu_enable_dsipll(void)
234{
235 int i;
236
237 /* Enable DSIPLL_RESETN resets */
238 writel(PRCMU_RESET_DSIPLL, PRCM_APE_RESETN_CLR);
239 /* Unclamp DSIPLL in/out */
240 writel(PRCMU_UNCLAMP_DSIPLL, PRCM_MMIP_LS_CLAMP_CLR);
241 /* Set DSI PLL FREQ */
242 writel(PRCMU_PLLDSI_FREQ_SETTING, PRCM_PLLDSI_FREQ);
243 writel(PRCMU_DSI_PLLOUT_SEL_SETTING,
244 PRCM_DSI_PLLOUT_SEL);
245 /* Enable Escape clocks */
246 writel(PRCMU_ENABLE_ESCAPE_CLOCK_DIV, PRCM_DSITVCLK_DIV);
247
248 /* Start DSI PLL */
249 writel(PRCMU_ENABLE_PLLDSI, PRCM_PLLDSI_ENABLE);
250 /* Reset DSI PLL */
251 writel(PRCMU_DSI_RESET_SW, PRCM_DSI_SW_RESET);
252 for (i = 0; i < 10; i++) {
253 if ((readl(PRCM_PLLDSI_LOCKP) &
254 PRCMU_PLLDSI_LOCKP_LOCKED) == PRCMU_PLLDSI_LOCKP_LOCKED)
255 break;
256 udelay(100);
257 }
258 /* Release DSIPLL_RESETN */
259 writel(PRCMU_RESET_DSIPLL, PRCM_APE_RESETN_SET);
260 return 0;
261}
262
263int db5500_prcmu_disable_dsipll(void)
264{
265 /* Disable dsi pll */
266 writel(PRCMU_DISABLE_PLLDSI, PRCM_PLLDSI_ENABLE);
267 /* Disable escapeclock */
268 writel(PRCMU_DISABLE_ESCAPE_CLOCK_DIV, PRCM_DSITVCLK_DIV);
269 return 0;
270}
271
272int db5500_prcmu_set_display_clocks(void)
273{
274 /* HDMI and TVCLK Should be handled somewhere else */
275 /* PLLDIV=8, PLLSW=2, CLKEN=1 */
276 writel(PRCMU_DSI_CLOCK_SETTING, PRCM_HDMICLK_MGT);
277 /* PLLDIV=14, PLLSW=2, CLKEN=1 */
278 writel(PRCMU_DSI_LP_CLOCK_SETTING, PRCM_TVCLK_MGT);
279 return 0;
280}
281
282static void ack_dbb_wakeup(void)
283{
284 unsigned long flags;
285
286 spin_lock_irqsave(&mb0_transfer.lock, flags);
287
288 while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(0))
289 cpu_relax();
290
291 writeb(RMB0H_RD_WAKE_UP_ACK, PRCM_REQ_MB0_HEADER);
292 writel(MBOX_BIT(0), PRCM_MBOX_CPU_SET);
293
294 spin_unlock_irqrestore(&mb0_transfer.lock, flags);
295}
296
297static inline void print_unknown_header_warning(u8 n, u8 header)
298{
299 pr_warning("prcmu: Unknown message header (%d) in mailbox %d.\n",
300 header, n);
301}
302
303static bool read_mailbox_0(void)
304{
305 bool r;
306 u8 header;
307
308 header = readb(PRCM_ACK_MB0_HEADER);
309 switch (header) {
310 case AMB0H_WAKE_UP:
311 r = true;
312 break;
313 default:
314 print_unknown_header_warning(0, header);
315 r = false;
316 break;
317 }
318 writel(MBOX_BIT(0), PRCM_ARM_IT1_CLEAR);
319 return r;
320}
321
322static bool read_mailbox_1(void)
323{
324 writel(MBOX_BIT(1), PRCM_ARM_IT1_CLEAR);
325 return false;
326}
327
328static bool read_mailbox_2(void)
329{
330 writel(MBOX_BIT(2), PRCM_ARM_IT1_CLEAR);
331 return false;
332}
333
334static bool read_mailbox_3(void)
335{
336 writel(MBOX_BIT(3), PRCM_ARM_IT1_CLEAR);
337 return false;
338}
339
340static bool read_mailbox_4(void)
341{
342 writel(MBOX_BIT(4), PRCM_ARM_IT1_CLEAR);
343 return false;
344}
345
346static bool read_mailbox_5(void)
347{
348 u8 header;
349
350 header = readb(PRCM_ACK_MB5_HEADER);
351 switch (header) {
352 case MB5H_I2C_READ:
353 memcpy_fromio(mb5_transfer.ack.value, PRCM_ACK_MB5_I2C_DATA, 4);
354 case MB5H_I2C_WRITE:
355 mb5_transfer.ack.header = header;
356 mb5_transfer.ack.status = readb(PRCM_ACK_MB5_RETURN_CODE);
357 complete(&mb5_transfer.work);
358 break;
359 default:
360 print_unknown_header_warning(5, header);
361 break;
362 }
363 writel(MBOX_BIT(5), PRCM_ARM_IT1_CLEAR);
364 return false;
365}
366
367static bool read_mailbox_6(void)
368{
369 writel(MBOX_BIT(6), PRCM_ARM_IT1_CLEAR);
370 return false;
371}
372
373static bool read_mailbox_7(void)
374{
375 writel(MBOX_BIT(7), PRCM_ARM_IT1_CLEAR);
376 return false;
377}
378
379static bool (* const read_mailbox[NUM_MB])(void) = {
380 read_mailbox_0,
381 read_mailbox_1,
382 read_mailbox_2,
383 read_mailbox_3,
384 read_mailbox_4,
385 read_mailbox_5,
386 read_mailbox_6,
387 read_mailbox_7
388};
389
390static irqreturn_t prcmu_irq_handler(int irq, void *data)
391{
392 u32 bits;
393 u8 n;
394 irqreturn_t r;
395
396 bits = (readl(PRCM_ARM_IT1_VAL) & ALL_MBOX_BITS);
397 if (unlikely(!bits))
398 return IRQ_NONE;
399
400 r = IRQ_HANDLED;
401 for (n = 0; bits; n++) {
402 if (bits & MBOX_BIT(n)) {
403 bits -= MBOX_BIT(n);
404 if (read_mailbox[n]())
405 r = IRQ_WAKE_THREAD;
406 }
407 }
408 return r;
409}
410
411static irqreturn_t prcmu_irq_thread_fn(int irq, void *data)
412{
413 ack_dbb_wakeup();
414 return IRQ_HANDLED;
415}
416
417void __init db5500_prcmu_early_init(void)
418{
419 tcdm_base = __io_address(U5500_PRCMU_TCDM_BASE);
420 spin_lock_init(&mb0_transfer.lock);
421 mutex_init(&mb5_transfer.lock);
422 init_completion(&mb5_transfer.work);
423}
424
425/**
426 * prcmu_fw_init - arch init call for the Linux PRCMU fw init logic
427 *
428 */
429int __init db5500_prcmu_init(void)
430{
431 int r = 0;
432
433 if (ux500_is_svp() || !cpu_is_u5500())
434 return -ENODEV;
435
436 /* Clean up the mailbox interrupts after pre-kernel code. */
437 writel(ALL_MBOX_BITS, PRCM_ARM_IT1_CLEAR);
438
439 r = request_threaded_irq(IRQ_DB5500_PRCMU1, prcmu_irq_handler,
440 prcmu_irq_thread_fn, 0, "prcmu", NULL);
441 if (r < 0) {
442 pr_err("prcmu: Failed to allocate IRQ_DB5500_PRCMU1.\n");
443 return -EBUSY;
444 }
445 return 0;
446}
447
448arch_initcall(db5500_prcmu_init);
diff --git a/drivers/mfd/db8500-prcmu-regs.h b/drivers/mfd/db8500-prcmu-regs.h
new file mode 100644
index 000000000000..3bbf04d58043
--- /dev/null
+++ b/drivers/mfd/db8500-prcmu-regs.h
@@ -0,0 +1,166 @@
1/*
2 * Copyright (C) STMicroelectronics 2009
3 * Copyright (C) ST-Ericsson SA 2010
4 *
5 * Author: Kumar Sanghvi <kumar.sanghvi@stericsson.com>
6 * Author: Sundar Iyer <sundar.iyer@stericsson.com>
7 *
8 * License Terms: GNU General Public License v2
9 *
10 * PRCM Unit registers
11 */
12#ifndef __DB8500_PRCMU_REGS_H
13#define __DB8500_PRCMU_REGS_H
14
15#include <linux/bitops.h>
16#include <mach/hardware.h>
17
18#define BITS(_start, _end) ((BIT(_end) - BIT(_start)) + BIT(_end))
19
20#define PRCM_ARM_PLLDIVPS 0x118
21#define PRCM_ARM_PLLDIVPS_ARM_BRM_RATE BITS(0, 5)
22#define PRCM_ARM_PLLDIVPS_MAX_MASK 0xF
23
24#define PRCM_PLLARM_LOCKP 0x0A8
25#define PRCM_PLLARM_LOCKP_PRCM_PLLARM_LOCKP3 BIT(1)
26
27#define PRCM_ARM_CHGCLKREQ 0x114
28#define PRCM_ARM_CHGCLKREQ_PRCM_ARM_CHGCLKREQ BIT(0)
29
30#define PRCM_PLLARM_ENABLE 0x98
31#define PRCM_PLLARM_ENABLE_PRCM_PLLARM_ENABLE BIT(0)
32#define PRCM_PLLARM_ENABLE_PRCM_PLLARM_COUNTON BIT(8)
33
34#define PRCM_ARMCLKFIX_MGT 0x0
35#define PRCM_A9_RESETN_CLR 0x1f4
36#define PRCM_A9_RESETN_SET 0x1f0
37#define PRCM_ARM_LS_CLAMP 0x30C
38#define PRCM_SRAM_A9 0x308
39
40/* ARM WFI Standby signal register */
41#define PRCM_ARM_WFI_STANDBY 0x130
42#define PRCM_IOCR 0x310
43#define PRCM_IOCR_IOFORCE BIT(0)
44
45/* CPU mailbox registers */
46#define PRCM_MBOX_CPU_VAL 0x0FC
47#define PRCM_MBOX_CPU_SET 0x100
48
49/* Dual A9 core interrupt management unit registers */
50#define PRCM_A9_MASK_REQ 0x328
51#define PRCM_A9_MASK_REQ_PRCM_A9_MASK_REQ BIT(0)
52
53#define PRCM_A9_MASK_ACK 0x32C
54#define PRCM_ARMITMSK31TO0 0x11C
55#define PRCM_ARMITMSK63TO32 0x120
56#define PRCM_ARMITMSK95TO64 0x124
57#define PRCM_ARMITMSK127TO96 0x128
58#define PRCM_POWER_STATE_VAL 0x25C
59#define PRCM_ARMITVAL31TO0 0x260
60#define PRCM_ARMITVAL63TO32 0x264
61#define PRCM_ARMITVAL95TO64 0x268
62#define PRCM_ARMITVAL127TO96 0x26C
63
64#define PRCM_HOSTACCESS_REQ 0x334
65#define PRCM_HOSTACCESS_REQ_HOSTACCESS_REQ BIT(0)
66
67#define PRCM_ARM_IT1_CLR 0x48C
68#define PRCM_ARM_IT1_VAL 0x494
69
70#define PRCM_ITSTATUS0 0x148
71#define PRCM_ITSTATUS1 0x150
72#define PRCM_ITSTATUS2 0x158
73#define PRCM_ITSTATUS3 0x160
74#define PRCM_ITSTATUS4 0x168
75#define PRCM_ITSTATUS5 0x484
76#define PRCM_ITCLEAR5 0x488
77#define PRCM_ARMIT_MASKXP70_IT 0x1018
78
79/* System reset register */
80#define PRCM_APE_SOFTRST 0x228
81
82/* Level shifter and clamp control registers */
83#define PRCM_MMIP_LS_CLAMP_SET 0x420
84#define PRCM_MMIP_LS_CLAMP_CLR 0x424
85
86/* PRCMU HW semaphore */
87#define PRCM_SEM 0x400
88#define PRCM_SEM_PRCM_SEM BIT(0)
89
90/* PRCMU clock/PLL/reset registers */
91#define PRCM_PLLDSI_FREQ 0x500
92#define PRCM_PLLDSI_ENABLE 0x504
93#define PRCM_PLLDSI_LOCKP 0x508
94#define PRCM_DSI_PLLOUT_SEL 0x530
95#define PRCM_DSITVCLK_DIV 0x52C
96#define PRCM_APE_RESETN_SET 0x1E4
97#define PRCM_APE_RESETN_CLR 0x1E8
98
99#define PRCM_TCR 0x1C8
100#define PRCM_TCR_TENSEL_MASK BITS(0, 7)
101#define PRCM_TCR_STOP_TIMERS BIT(16)
102#define PRCM_TCR_DOZE_MODE BIT(17)
103
104#define PRCM_CLKOCR 0x1CC
105#define PRCM_CLKOCR_CLKODIV0_SHIFT 0
106#define PRCM_CLKOCR_CLKODIV0_MASK BITS(0, 5)
107#define PRCM_CLKOCR_CLKOSEL0_SHIFT 6
108#define PRCM_CLKOCR_CLKOSEL0_MASK BITS(6, 8)
109#define PRCM_CLKOCR_CLKODIV1_SHIFT 16
110#define PRCM_CLKOCR_CLKODIV1_MASK BITS(16, 21)
111#define PRCM_CLKOCR_CLKOSEL1_SHIFT 22
112#define PRCM_CLKOCR_CLKOSEL1_MASK BITS(22, 24)
113#define PRCM_CLKOCR_CLK1TYPE BIT(28)
114
115#define PRCM_SGACLK_MGT 0x014
116#define PRCM_UARTCLK_MGT 0x018
117#define PRCM_MSP02CLK_MGT 0x01C
118#define PRCM_MSP1CLK_MGT 0x288
119#define PRCM_I2CCLK_MGT 0x020
120#define PRCM_SDMMCCLK_MGT 0x024
121#define PRCM_SLIMCLK_MGT 0x028
122#define PRCM_PER1CLK_MGT 0x02C
123#define PRCM_PER2CLK_MGT 0x030
124#define PRCM_PER3CLK_MGT 0x034
125#define PRCM_PER5CLK_MGT 0x038
126#define PRCM_PER6CLK_MGT 0x03C
127#define PRCM_PER7CLK_MGT 0x040
128#define PRCM_LCDCLK_MGT 0x044
129#define PRCM_BMLCLK_MGT 0x04C
130#define PRCM_HSITXCLK_MGT 0x050
131#define PRCM_HSIRXCLK_MGT 0x054
132#define PRCM_HDMICLK_MGT 0x058
133#define PRCM_APEATCLK_MGT 0x05C
134#define PRCM_APETRACECLK_MGT 0x060
135#define PRCM_MCDECLK_MGT 0x064
136#define PRCM_IPI2CCLK_MGT 0x068
137#define PRCM_DSIALTCLK_MGT 0x06C
138#define PRCM_DMACLK_MGT 0x074
139#define PRCM_B2R2CLK_MGT 0x078
140#define PRCM_TVCLK_MGT 0x07C
141#define PRCM_UNIPROCLK_MGT 0x278
142#define PRCM_SSPCLK_MGT 0x280
143#define PRCM_RNGCLK_MGT 0x284
144#define PRCM_UICCCLK_MGT 0x27C
145
146#define PRCM_CLK_MGT_CLKPLLDIV_MASK BITS(0, 4)
147#define PRCM_CLK_MGT_CLKPLLSW_MASK BITS(5, 7)
148#define PRCM_CLK_MGT_CLKEN BIT(8)
149
150/* ePOD and memory power signal control registers */
151#define PRCM_EPOD_C_SET 0x410
152#define PRCM_SRAM_LS_SLEEP 0x304
153
154/* Debug power control unit registers */
155#define PRCM_POWER_STATE_SET 0x254
156
157/* Miscellaneous unit registers */
158#define PRCM_DSI_SW_RESET 0x324
159#define PRCM_GPIOCR 0x138
160
161/* GPIOCR register */
162#define PRCM_GPIOCR_SPI2_SELECT BIT(23)
163
164#define PRCM_DDR_SUBSYS_APE_MINBW 0x438
165
166#endif /* __DB8500_PRCMU_REGS_H */
diff --git a/drivers/mfd/db8500-prcmu.c b/drivers/mfd/db8500-prcmu.c
new file mode 100644
index 000000000000..e63782107e2f
--- /dev/null
+++ b/drivers/mfd/db8500-prcmu.c
@@ -0,0 +1,2069 @@
1/*
2 * Copyright (C) STMicroelectronics 2009
3 * Copyright (C) ST-Ericsson SA 2010
4 *
5 * License Terms: GNU General Public License v2
6 * Author: Kumar Sanghvi <kumar.sanghvi@stericsson.com>
7 * Author: Sundar Iyer <sundar.iyer@stericsson.com>
8 * Author: Mattias Nilsson <mattias.i.nilsson@stericsson.com>
9 *
10 * U8500 PRCM Unit interface driver
11 *
12 */
13#include <linux/module.h>
14#include <linux/kernel.h>
15#include <linux/delay.h>
16#include <linux/errno.h>
17#include <linux/err.h>
18#include <linux/spinlock.h>
19#include <linux/io.h>
20#include <linux/slab.h>
21#include <linux/mutex.h>
22#include <linux/completion.h>
23#include <linux/irq.h>
24#include <linux/jiffies.h>
25#include <linux/bitops.h>
26#include <linux/fs.h>
27#include <linux/platform_device.h>
28#include <linux/uaccess.h>
29#include <linux/mfd/core.h>
30#include <linux/mfd/db8500-prcmu.h>
31#include <linux/regulator/db8500-prcmu.h>
32#include <linux/regulator/machine.h>
33#include <mach/hardware.h>
34#include <mach/irqs.h>
35#include <mach/db8500-regs.h>
36#include <mach/id.h>
37#include "db8500-prcmu-regs.h"
38
39/* Offset for the firmware version within the TCPM */
40#define PRCMU_FW_VERSION_OFFSET 0xA4
41
42/* PRCMU project numbers, defined by PRCMU FW */
43#define PRCMU_PROJECT_ID_8500V1_0 1
44#define PRCMU_PROJECT_ID_8500V2_0 2
45#define PRCMU_PROJECT_ID_8400V2_0 3
46
47/* Index of different voltages to be used when accessing AVSData */
48#define PRCM_AVS_BASE 0x2FC
49#define PRCM_AVS_VBB_RET (PRCM_AVS_BASE + 0x0)
50#define PRCM_AVS_VBB_MAX_OPP (PRCM_AVS_BASE + 0x1)
51#define PRCM_AVS_VBB_100_OPP (PRCM_AVS_BASE + 0x2)
52#define PRCM_AVS_VBB_50_OPP (PRCM_AVS_BASE + 0x3)
53#define PRCM_AVS_VARM_MAX_OPP (PRCM_AVS_BASE + 0x4)
54#define PRCM_AVS_VARM_100_OPP (PRCM_AVS_BASE + 0x5)
55#define PRCM_AVS_VARM_50_OPP (PRCM_AVS_BASE + 0x6)
56#define PRCM_AVS_VARM_RET (PRCM_AVS_BASE + 0x7)
57#define PRCM_AVS_VAPE_100_OPP (PRCM_AVS_BASE + 0x8)
58#define PRCM_AVS_VAPE_50_OPP (PRCM_AVS_BASE + 0x9)
59#define PRCM_AVS_VMOD_100_OPP (PRCM_AVS_BASE + 0xA)
60#define PRCM_AVS_VMOD_50_OPP (PRCM_AVS_BASE + 0xB)
61#define PRCM_AVS_VSAFE (PRCM_AVS_BASE + 0xC)
62
63#define PRCM_AVS_VOLTAGE 0
64#define PRCM_AVS_VOLTAGE_MASK 0x3f
65#define PRCM_AVS_ISSLOWSTARTUP 6
66#define PRCM_AVS_ISSLOWSTARTUP_MASK (1 << PRCM_AVS_ISSLOWSTARTUP)
67#define PRCM_AVS_ISMODEENABLE 7
68#define PRCM_AVS_ISMODEENABLE_MASK (1 << PRCM_AVS_ISMODEENABLE)
69
70#define PRCM_BOOT_STATUS 0xFFF
71#define PRCM_ROMCODE_A2P 0xFFE
72#define PRCM_ROMCODE_P2A 0xFFD
73#define PRCM_XP70_CUR_PWR_STATE 0xFFC /* 4 BYTES */
74
75#define PRCM_SW_RST_REASON 0xFF8 /* 2 bytes */
76
77#define _PRCM_MBOX_HEADER 0xFE8 /* 16 bytes */
78#define PRCM_MBOX_HEADER_REQ_MB0 (_PRCM_MBOX_HEADER + 0x0)
79#define PRCM_MBOX_HEADER_REQ_MB1 (_PRCM_MBOX_HEADER + 0x1)
80#define PRCM_MBOX_HEADER_REQ_MB2 (_PRCM_MBOX_HEADER + 0x2)
81#define PRCM_MBOX_HEADER_REQ_MB3 (_PRCM_MBOX_HEADER + 0x3)
82#define PRCM_MBOX_HEADER_REQ_MB4 (_PRCM_MBOX_HEADER + 0x4)
83#define PRCM_MBOX_HEADER_REQ_MB5 (_PRCM_MBOX_HEADER + 0x5)
84#define PRCM_MBOX_HEADER_ACK_MB0 (_PRCM_MBOX_HEADER + 0x8)
85
86/* Req Mailboxes */
87#define PRCM_REQ_MB0 0xFDC /* 12 bytes */
88#define PRCM_REQ_MB1 0xFD0 /* 12 bytes */
89#define PRCM_REQ_MB2 0xFC0 /* 16 bytes */
90#define PRCM_REQ_MB3 0xE4C /* 372 bytes */
91#define PRCM_REQ_MB4 0xE48 /* 4 bytes */
92#define PRCM_REQ_MB5 0xE44 /* 4 bytes */
93
94/* Ack Mailboxes */
95#define PRCM_ACK_MB0 0xE08 /* 52 bytes */
96#define PRCM_ACK_MB1 0xE04 /* 4 bytes */
97#define PRCM_ACK_MB2 0xE00 /* 4 bytes */
98#define PRCM_ACK_MB3 0xDFC /* 4 bytes */
99#define PRCM_ACK_MB4 0xDF8 /* 4 bytes */
100#define PRCM_ACK_MB5 0xDF4 /* 4 bytes */
101
102/* Mailbox 0 headers */
103#define MB0H_POWER_STATE_TRANS 0
104#define MB0H_CONFIG_WAKEUPS_EXE 1
105#define MB0H_READ_WAKEUP_ACK 3
106#define MB0H_CONFIG_WAKEUPS_SLEEP 4
107
108#define MB0H_WAKEUP_EXE 2
109#define MB0H_WAKEUP_SLEEP 5
110
111/* Mailbox 0 REQs */
112#define PRCM_REQ_MB0_AP_POWER_STATE (PRCM_REQ_MB0 + 0x0)
113#define PRCM_REQ_MB0_AP_PLL_STATE (PRCM_REQ_MB0 + 0x1)
114#define PRCM_REQ_MB0_ULP_CLOCK_STATE (PRCM_REQ_MB0 + 0x2)
115#define PRCM_REQ_MB0_DO_NOT_WFI (PRCM_REQ_MB0 + 0x3)
116#define PRCM_REQ_MB0_WAKEUP_8500 (PRCM_REQ_MB0 + 0x4)
117#define PRCM_REQ_MB0_WAKEUP_4500 (PRCM_REQ_MB0 + 0x8)
118
119/* Mailbox 0 ACKs */
120#define PRCM_ACK_MB0_AP_PWRSTTR_STATUS (PRCM_ACK_MB0 + 0x0)
121#define PRCM_ACK_MB0_READ_POINTER (PRCM_ACK_MB0 + 0x1)
122#define PRCM_ACK_MB0_WAKEUP_0_8500 (PRCM_ACK_MB0 + 0x4)
123#define PRCM_ACK_MB0_WAKEUP_0_4500 (PRCM_ACK_MB0 + 0x8)
124#define PRCM_ACK_MB0_WAKEUP_1_8500 (PRCM_ACK_MB0 + 0x1C)
125#define PRCM_ACK_MB0_WAKEUP_1_4500 (PRCM_ACK_MB0 + 0x20)
126#define PRCM_ACK_MB0_EVENT_4500_NUMBERS 20
127
128/* Mailbox 1 headers */
129#define MB1H_ARM_APE_OPP 0x0
130#define MB1H_RESET_MODEM 0x2
131#define MB1H_REQUEST_APE_OPP_100_VOLT 0x3
132#define MB1H_RELEASE_APE_OPP_100_VOLT 0x4
133#define MB1H_RELEASE_USB_WAKEUP 0x5
134
135/* Mailbox 1 Requests */
136#define PRCM_REQ_MB1_ARM_OPP (PRCM_REQ_MB1 + 0x0)
137#define PRCM_REQ_MB1_APE_OPP (PRCM_REQ_MB1 + 0x1)
138#define PRCM_REQ_MB1_APE_OPP_100_RESTORE (PRCM_REQ_MB1 + 0x4)
139#define PRCM_REQ_MB1_ARM_OPP_100_RESTORE (PRCM_REQ_MB1 + 0x8)
140
141/* Mailbox 1 ACKs */
142#define PRCM_ACK_MB1_CURRENT_ARM_OPP (PRCM_ACK_MB1 + 0x0)
143#define PRCM_ACK_MB1_CURRENT_APE_OPP (PRCM_ACK_MB1 + 0x1)
144#define PRCM_ACK_MB1_APE_VOLTAGE_STATUS (PRCM_ACK_MB1 + 0x2)
145#define PRCM_ACK_MB1_DVFS_STATUS (PRCM_ACK_MB1 + 0x3)
146
147/* Mailbox 2 headers */
148#define MB2H_DPS 0x0
149#define MB2H_AUTO_PWR 0x1
150
151/* Mailbox 2 REQs */
152#define PRCM_REQ_MB2_SVA_MMDSP (PRCM_REQ_MB2 + 0x0)
153#define PRCM_REQ_MB2_SVA_PIPE (PRCM_REQ_MB2 + 0x1)
154#define PRCM_REQ_MB2_SIA_MMDSP (PRCM_REQ_MB2 + 0x2)
155#define PRCM_REQ_MB2_SIA_PIPE (PRCM_REQ_MB2 + 0x3)
156#define PRCM_REQ_MB2_SGA (PRCM_REQ_MB2 + 0x4)
157#define PRCM_REQ_MB2_B2R2_MCDE (PRCM_REQ_MB2 + 0x5)
158#define PRCM_REQ_MB2_ESRAM12 (PRCM_REQ_MB2 + 0x6)
159#define PRCM_REQ_MB2_ESRAM34 (PRCM_REQ_MB2 + 0x7)
160#define PRCM_REQ_MB2_AUTO_PM_SLEEP (PRCM_REQ_MB2 + 0x8)
161#define PRCM_REQ_MB2_AUTO_PM_IDLE (PRCM_REQ_MB2 + 0xC)
162
163/* Mailbox 2 ACKs */
164#define PRCM_ACK_MB2_DPS_STATUS (PRCM_ACK_MB2 + 0x0)
165#define HWACC_PWR_ST_OK 0xFE
166
167/* Mailbox 3 headers */
168#define MB3H_ANC 0x0
169#define MB3H_SIDETONE 0x1
170#define MB3H_SYSCLK 0xE
171
172/* Mailbox 3 Requests */
173#define PRCM_REQ_MB3_ANC_FIR_COEFF (PRCM_REQ_MB3 + 0x0)
174#define PRCM_REQ_MB3_ANC_IIR_COEFF (PRCM_REQ_MB3 + 0x20)
175#define PRCM_REQ_MB3_ANC_SHIFTER (PRCM_REQ_MB3 + 0x60)
176#define PRCM_REQ_MB3_ANC_WARP (PRCM_REQ_MB3 + 0x64)
177#define PRCM_REQ_MB3_SIDETONE_FIR_GAIN (PRCM_REQ_MB3 + 0x68)
178#define PRCM_REQ_MB3_SIDETONE_FIR_COEFF (PRCM_REQ_MB3 + 0x6C)
179#define PRCM_REQ_MB3_SYSCLK_MGT (PRCM_REQ_MB3 + 0x16C)
180
181/* Mailbox 4 headers */
182#define MB4H_DDR_INIT 0x0
183#define MB4H_MEM_ST 0x1
184#define MB4H_HOTDOG 0x12
185#define MB4H_HOTMON 0x13
186#define MB4H_HOT_PERIOD 0x14
187
188/* Mailbox 4 Requests */
189#define PRCM_REQ_MB4_DDR_ST_AP_SLEEP_IDLE (PRCM_REQ_MB4 + 0x0)
190#define PRCM_REQ_MB4_DDR_ST_AP_DEEP_IDLE (PRCM_REQ_MB4 + 0x1)
191#define PRCM_REQ_MB4_ESRAM0_ST (PRCM_REQ_MB4 + 0x3)
192#define PRCM_REQ_MB4_HOTDOG_THRESHOLD (PRCM_REQ_MB4 + 0x0)
193#define PRCM_REQ_MB4_HOTMON_LOW (PRCM_REQ_MB4 + 0x0)
194#define PRCM_REQ_MB4_HOTMON_HIGH (PRCM_REQ_MB4 + 0x1)
195#define PRCM_REQ_MB4_HOTMON_CONFIG (PRCM_REQ_MB4 + 0x2)
196#define PRCM_REQ_MB4_HOT_PERIOD (PRCM_REQ_MB4 + 0x0)
197#define HOTMON_CONFIG_LOW BIT(0)
198#define HOTMON_CONFIG_HIGH BIT(1)
199
200/* Mailbox 5 Requests */
201#define PRCM_REQ_MB5_I2C_SLAVE_OP (PRCM_REQ_MB5 + 0x0)
202#define PRCM_REQ_MB5_I2C_HW_BITS (PRCM_REQ_MB5 + 0x1)
203#define PRCM_REQ_MB5_I2C_REG (PRCM_REQ_MB5 + 0x2)
204#define PRCM_REQ_MB5_I2C_VAL (PRCM_REQ_MB5 + 0x3)
205#define PRCMU_I2C_WRITE(slave) \
206 (((slave) << 1) | (cpu_is_u8500v2() ? BIT(6) : 0))
207#define PRCMU_I2C_READ(slave) \
208 (((slave) << 1) | BIT(0) | (cpu_is_u8500v2() ? BIT(6) : 0))
209#define PRCMU_I2C_STOP_EN BIT(3)
210
211/* Mailbox 5 ACKs */
212#define PRCM_ACK_MB5_I2C_STATUS (PRCM_ACK_MB5 + 0x1)
213#define PRCM_ACK_MB5_I2C_VAL (PRCM_ACK_MB5 + 0x3)
214#define I2C_WR_OK 0x1
215#define I2C_RD_OK 0x2
216
217#define NUM_MB 8
218#define MBOX_BIT BIT
219#define ALL_MBOX_BITS (MBOX_BIT(NUM_MB) - 1)
220
221/*
222 * Wakeups/IRQs
223 */
224
225#define WAKEUP_BIT_RTC BIT(0)
226#define WAKEUP_BIT_RTT0 BIT(1)
227#define WAKEUP_BIT_RTT1 BIT(2)
228#define WAKEUP_BIT_HSI0 BIT(3)
229#define WAKEUP_BIT_HSI1 BIT(4)
230#define WAKEUP_BIT_CA_WAKE BIT(5)
231#define WAKEUP_BIT_USB BIT(6)
232#define WAKEUP_BIT_ABB BIT(7)
233#define WAKEUP_BIT_ABB_FIFO BIT(8)
234#define WAKEUP_BIT_SYSCLK_OK BIT(9)
235#define WAKEUP_BIT_CA_SLEEP BIT(10)
236#define WAKEUP_BIT_AC_WAKE_ACK BIT(11)
237#define WAKEUP_BIT_SIDE_TONE_OK BIT(12)
238#define WAKEUP_BIT_ANC_OK BIT(13)
239#define WAKEUP_BIT_SW_ERROR BIT(14)
240#define WAKEUP_BIT_AC_SLEEP_ACK BIT(15)
241#define WAKEUP_BIT_ARM BIT(17)
242#define WAKEUP_BIT_HOTMON_LOW BIT(18)
243#define WAKEUP_BIT_HOTMON_HIGH BIT(19)
244#define WAKEUP_BIT_MODEM_SW_RESET_REQ BIT(20)
245#define WAKEUP_BIT_GPIO0 BIT(23)
246#define WAKEUP_BIT_GPIO1 BIT(24)
247#define WAKEUP_BIT_GPIO2 BIT(25)
248#define WAKEUP_BIT_GPIO3 BIT(26)
249#define WAKEUP_BIT_GPIO4 BIT(27)
250#define WAKEUP_BIT_GPIO5 BIT(28)
251#define WAKEUP_BIT_GPIO6 BIT(29)
252#define WAKEUP_BIT_GPIO7 BIT(30)
253#define WAKEUP_BIT_GPIO8 BIT(31)
254
255/*
256 * This vector maps irq numbers to the bits in the bit field used in
257 * communication with the PRCMU firmware.
258 *
259 * The reason for having this is to keep the irq numbers contiguous even though
260 * the bits in the bit field are not. (The bits also have a tendency to move
261 * around, to further complicate matters.)
262 */
263#define IRQ_INDEX(_name) ((IRQ_PRCMU_##_name) - IRQ_PRCMU_BASE)
264#define IRQ_ENTRY(_name)[IRQ_INDEX(_name)] = (WAKEUP_BIT_##_name)
265static u32 prcmu_irq_bit[NUM_PRCMU_WAKEUPS] = {
266 IRQ_ENTRY(RTC),
267 IRQ_ENTRY(RTT0),
268 IRQ_ENTRY(RTT1),
269 IRQ_ENTRY(HSI0),
270 IRQ_ENTRY(HSI1),
271 IRQ_ENTRY(CA_WAKE),
272 IRQ_ENTRY(USB),
273 IRQ_ENTRY(ABB),
274 IRQ_ENTRY(ABB_FIFO),
275 IRQ_ENTRY(CA_SLEEP),
276 IRQ_ENTRY(ARM),
277 IRQ_ENTRY(HOTMON_LOW),
278 IRQ_ENTRY(HOTMON_HIGH),
279 IRQ_ENTRY(MODEM_SW_RESET_REQ),
280 IRQ_ENTRY(GPIO0),
281 IRQ_ENTRY(GPIO1),
282 IRQ_ENTRY(GPIO2),
283 IRQ_ENTRY(GPIO3),
284 IRQ_ENTRY(GPIO4),
285 IRQ_ENTRY(GPIO5),
286 IRQ_ENTRY(GPIO6),
287 IRQ_ENTRY(GPIO7),
288 IRQ_ENTRY(GPIO8)
289};
290
291#define VALID_WAKEUPS (BIT(NUM_PRCMU_WAKEUP_INDICES) - 1)
292#define WAKEUP_ENTRY(_name)[PRCMU_WAKEUP_INDEX_##_name] = (WAKEUP_BIT_##_name)
293static u32 prcmu_wakeup_bit[NUM_PRCMU_WAKEUP_INDICES] = {
294 WAKEUP_ENTRY(RTC),
295 WAKEUP_ENTRY(RTT0),
296 WAKEUP_ENTRY(RTT1),
297 WAKEUP_ENTRY(HSI0),
298 WAKEUP_ENTRY(HSI1),
299 WAKEUP_ENTRY(USB),
300 WAKEUP_ENTRY(ABB),
301 WAKEUP_ENTRY(ABB_FIFO),
302 WAKEUP_ENTRY(ARM)
303};
304
305/*
306 * mb0_transfer - state needed for mailbox 0 communication.
307 * @lock: The transaction lock.
308 * @dbb_events_lock: A lock used to handle concurrent access to (parts of)
309 * the request data.
310 * @mask_work: Work structure used for (un)masking wakeup interrupts.
311 * @req: Request data that need to persist between requests.
312 */
313static struct {
314 spinlock_t lock;
315 spinlock_t dbb_irqs_lock;
316 struct work_struct mask_work;
317 struct mutex ac_wake_lock;
318 struct completion ac_wake_work;
319 struct {
320 u32 dbb_irqs;
321 u32 dbb_wakeups;
322 u32 abb_events;
323 } req;
324} mb0_transfer;
325
326/*
327 * mb1_transfer - state needed for mailbox 1 communication.
328 * @lock: The transaction lock.
329 * @work: The transaction completion structure.
330 * @ack: Reply ("acknowledge") data.
331 */
332static struct {
333 struct mutex lock;
334 struct completion work;
335 struct {
336 u8 header;
337 u8 arm_opp;
338 u8 ape_opp;
339 u8 ape_voltage_status;
340 } ack;
341} mb1_transfer;
342
343/*
344 * mb2_transfer - state needed for mailbox 2 communication.
345 * @lock: The transaction lock.
346 * @work: The transaction completion structure.
347 * @auto_pm_lock: The autonomous power management configuration lock.
348 * @auto_pm_enabled: A flag indicating whether autonomous PM is enabled.
349 * @req: Request data that need to persist between requests.
350 * @ack: Reply ("acknowledge") data.
351 */
352static struct {
353 struct mutex lock;
354 struct completion work;
355 spinlock_t auto_pm_lock;
356 bool auto_pm_enabled;
357 struct {
358 u8 status;
359 } ack;
360} mb2_transfer;
361
362/*
363 * mb3_transfer - state needed for mailbox 3 communication.
364 * @lock: The request lock.
365 * @sysclk_lock: A lock used to handle concurrent sysclk requests.
366 * @sysclk_work: Work structure used for sysclk requests.
367 */
368static struct {
369 spinlock_t lock;
370 struct mutex sysclk_lock;
371 struct completion sysclk_work;
372} mb3_transfer;
373
374/*
375 * mb4_transfer - state needed for mailbox 4 communication.
376 * @lock: The transaction lock.
377 * @work: The transaction completion structure.
378 */
379static struct {
380 struct mutex lock;
381 struct completion work;
382} mb4_transfer;
383
384/*
385 * mb5_transfer - state needed for mailbox 5 communication.
386 * @lock: The transaction lock.
387 * @work: The transaction completion structure.
388 * @ack: Reply ("acknowledge") data.
389 */
390static struct {
391 struct mutex lock;
392 struct completion work;
393 struct {
394 u8 status;
395 u8 value;
396 } ack;
397} mb5_transfer;
398
399static atomic_t ac_wake_req_state = ATOMIC_INIT(0);
400
401/* Spinlocks */
402static DEFINE_SPINLOCK(clkout_lock);
403static DEFINE_SPINLOCK(gpiocr_lock);
404
405/* Global var to runtime determine TCDM base for v2 or v1 */
406static __iomem void *tcdm_base;
407
408struct clk_mgt {
409 unsigned int offset;
410 u32 pllsw;
411};
412
413static DEFINE_SPINLOCK(clk_mgt_lock);
414
415#define CLK_MGT_ENTRY(_name)[PRCMU_##_name] = { (PRCM_##_name##_MGT), 0 }
416struct clk_mgt clk_mgt[PRCMU_NUM_REG_CLOCKS] = {
417 CLK_MGT_ENTRY(SGACLK),
418 CLK_MGT_ENTRY(UARTCLK),
419 CLK_MGT_ENTRY(MSP02CLK),
420 CLK_MGT_ENTRY(MSP1CLK),
421 CLK_MGT_ENTRY(I2CCLK),
422 CLK_MGT_ENTRY(SDMMCCLK),
423 CLK_MGT_ENTRY(SLIMCLK),
424 CLK_MGT_ENTRY(PER1CLK),
425 CLK_MGT_ENTRY(PER2CLK),
426 CLK_MGT_ENTRY(PER3CLK),
427 CLK_MGT_ENTRY(PER5CLK),
428 CLK_MGT_ENTRY(PER6CLK),
429 CLK_MGT_ENTRY(PER7CLK),
430 CLK_MGT_ENTRY(LCDCLK),
431 CLK_MGT_ENTRY(BMLCLK),
432 CLK_MGT_ENTRY(HSITXCLK),
433 CLK_MGT_ENTRY(HSIRXCLK),
434 CLK_MGT_ENTRY(HDMICLK),
435 CLK_MGT_ENTRY(APEATCLK),
436 CLK_MGT_ENTRY(APETRACECLK),
437 CLK_MGT_ENTRY(MCDECLK),
438 CLK_MGT_ENTRY(IPI2CCLK),
439 CLK_MGT_ENTRY(DSIALTCLK),
440 CLK_MGT_ENTRY(DMACLK),
441 CLK_MGT_ENTRY(B2R2CLK),
442 CLK_MGT_ENTRY(TVCLK),
443 CLK_MGT_ENTRY(SSPCLK),
444 CLK_MGT_ENTRY(RNGCLK),
445 CLK_MGT_ENTRY(UICCCLK),
446};
447
448/*
449* Used by MCDE to setup all necessary PRCMU registers
450*/
451#define PRCMU_RESET_DSIPLL 0x00004000
452#define PRCMU_UNCLAMP_DSIPLL 0x00400800
453
454#define PRCMU_CLK_PLL_DIV_SHIFT 0
455#define PRCMU_CLK_PLL_SW_SHIFT 5
456#define PRCMU_CLK_38 (1 << 9)
457#define PRCMU_CLK_38_SRC (1 << 10)
458#define PRCMU_CLK_38_DIV (1 << 11)
459
460/* PLLDIV=12, PLLSW=4 (PLLDDR) */
461#define PRCMU_DSI_CLOCK_SETTING 0x0000008C
462
463/* PLLDIV=8, PLLSW=4 (PLLDDR) */
464#define PRCMU_DSI_CLOCK_SETTING_U8400 0x00000088
465
466/* DPI 50000000 Hz */
467#define PRCMU_DPI_CLOCK_SETTING ((1 << PRCMU_CLK_PLL_SW_SHIFT) | \
468 (16 << PRCMU_CLK_PLL_DIV_SHIFT))
469#define PRCMU_DSI_LP_CLOCK_SETTING 0x00000E00
470
471/* D=101, N=1, R=4, SELDIV2=0 */
472#define PRCMU_PLLDSI_FREQ_SETTING 0x00040165
473
474/* D=70, N=1, R=3, SELDIV2=0 */
475#define PRCMU_PLLDSI_FREQ_SETTING_U8400 0x00030146
476
477#define PRCMU_ENABLE_PLLDSI 0x00000001
478#define PRCMU_DISABLE_PLLDSI 0x00000000
479#define PRCMU_RELEASE_RESET_DSS 0x0000400C
480#define PRCMU_DSI_PLLOUT_SEL_SETTING 0x00000202
481/* ESC clk, div0=1, div1=1, div2=3 */
482#define PRCMU_ENABLE_ESCAPE_CLOCK_DIV 0x07030101
483#define PRCMU_DISABLE_ESCAPE_CLOCK_DIV 0x00030101
484#define PRCMU_DSI_RESET_SW 0x00000007
485
486#define PRCMU_PLLDSI_LOCKP_LOCKED 0x3
487
488static struct {
489 u8 project_number;
490 u8 api_version;
491 u8 func_version;
492 u8 errata;
493} prcmu_version;
494
495
496int prcmu_enable_dsipll(void)
497{
498 int i;
499 unsigned int plldsifreq;
500
501 /* Clear DSIPLL_RESETN */
502 writel(PRCMU_RESET_DSIPLL, (_PRCMU_BASE + PRCM_APE_RESETN_CLR));
503 /* Unclamp DSIPLL in/out */
504 writel(PRCMU_UNCLAMP_DSIPLL, (_PRCMU_BASE + PRCM_MMIP_LS_CLAMP_CLR));
505
506 if (prcmu_is_u8400())
507 plldsifreq = PRCMU_PLLDSI_FREQ_SETTING_U8400;
508 else
509 plldsifreq = PRCMU_PLLDSI_FREQ_SETTING;
510 /* Set DSI PLL FREQ */
511 writel(plldsifreq, (_PRCMU_BASE + PRCM_PLLDSI_FREQ));
512 writel(PRCMU_DSI_PLLOUT_SEL_SETTING,
513 (_PRCMU_BASE + PRCM_DSI_PLLOUT_SEL));
514 /* Enable Escape clocks */
515 writel(PRCMU_ENABLE_ESCAPE_CLOCK_DIV,
516 (_PRCMU_BASE + PRCM_DSITVCLK_DIV));
517
518 /* Start DSI PLL */
519 writel(PRCMU_ENABLE_PLLDSI, (_PRCMU_BASE + PRCM_PLLDSI_ENABLE));
520 /* Reset DSI PLL */
521 writel(PRCMU_DSI_RESET_SW, (_PRCMU_BASE + PRCM_DSI_SW_RESET));
522 for (i = 0; i < 10; i++) {
523 if ((readl(_PRCMU_BASE + PRCM_PLLDSI_LOCKP) &
524 PRCMU_PLLDSI_LOCKP_LOCKED)
525 == PRCMU_PLLDSI_LOCKP_LOCKED)
526 break;
527 udelay(100);
528 }
529 /* Set DSIPLL_RESETN */
530 writel(PRCMU_RESET_DSIPLL, (_PRCMU_BASE + PRCM_APE_RESETN_SET));
531 return 0;
532}
533
534int prcmu_disable_dsipll(void)
535{
536 /* Disable dsi pll */
537 writel(PRCMU_DISABLE_PLLDSI, (_PRCMU_BASE + PRCM_PLLDSI_ENABLE));
538 /* Disable escapeclock */
539 writel(PRCMU_DISABLE_ESCAPE_CLOCK_DIV,
540 (_PRCMU_BASE + PRCM_DSITVCLK_DIV));
541 return 0;
542}
543
544int prcmu_set_display_clocks(void)
545{
546 unsigned long flags;
547 unsigned int dsiclk;
548
549 if (prcmu_is_u8400())
550 dsiclk = PRCMU_DSI_CLOCK_SETTING_U8400;
551 else
552 dsiclk = PRCMU_DSI_CLOCK_SETTING;
553
554 spin_lock_irqsave(&clk_mgt_lock, flags);
555
556 /* Grab the HW semaphore. */
557 while ((readl(_PRCMU_BASE + PRCM_SEM) & PRCM_SEM_PRCM_SEM) != 0)
558 cpu_relax();
559
560 writel(dsiclk, (_PRCMU_BASE + PRCM_HDMICLK_MGT));
561 writel(PRCMU_DSI_LP_CLOCK_SETTING, (_PRCMU_BASE + PRCM_TVCLK_MGT));
562 writel(PRCMU_DPI_CLOCK_SETTING, (_PRCMU_BASE + PRCM_LCDCLK_MGT));
563
564 /* Release the HW semaphore. */
565 writel(0, (_PRCMU_BASE + PRCM_SEM));
566
567 spin_unlock_irqrestore(&clk_mgt_lock, flags);
568
569 return 0;
570}
571
572/**
573 * prcmu_enable_spi2 - Enables pin muxing for SPI2 on OtherAlternateC1.
574 */
575void prcmu_enable_spi2(void)
576{
577 u32 reg;
578 unsigned long flags;
579
580 spin_lock_irqsave(&gpiocr_lock, flags);
581 reg = readl(_PRCMU_BASE + PRCM_GPIOCR);
582 writel(reg | PRCM_GPIOCR_SPI2_SELECT, _PRCMU_BASE + PRCM_GPIOCR);
583 spin_unlock_irqrestore(&gpiocr_lock, flags);
584}
585
586/**
587 * prcmu_disable_spi2 - Disables pin muxing for SPI2 on OtherAlternateC1.
588 */
589void prcmu_disable_spi2(void)
590{
591 u32 reg;
592 unsigned long flags;
593
594 spin_lock_irqsave(&gpiocr_lock, flags);
595 reg = readl(_PRCMU_BASE + PRCM_GPIOCR);
596 writel(reg & ~PRCM_GPIOCR_SPI2_SELECT, _PRCMU_BASE + PRCM_GPIOCR);
597 spin_unlock_irqrestore(&gpiocr_lock, flags);
598}
599
600bool prcmu_has_arm_maxopp(void)
601{
602 return (readb(tcdm_base + PRCM_AVS_VARM_MAX_OPP) &
603 PRCM_AVS_ISMODEENABLE_MASK) == PRCM_AVS_ISMODEENABLE_MASK;
604}
605
606bool prcmu_is_u8400(void)
607{
608 return prcmu_version.project_number == PRCMU_PROJECT_ID_8400V2_0;
609}
610
611/**
612 * prcmu_get_boot_status - PRCMU boot status checking
613 * Returns: the current PRCMU boot status
614 */
615int prcmu_get_boot_status(void)
616{
617 return readb(tcdm_base + PRCM_BOOT_STATUS);
618}
619
620/**
621 * prcmu_set_rc_a2p - This function is used to run few power state sequences
622 * @val: Value to be set, i.e. transition requested
623 * Returns: 0 on success, -EINVAL on invalid argument
624 *
625 * This function is used to run the following power state sequences -
626 * any state to ApReset, ApDeepSleep to ApExecute, ApExecute to ApDeepSleep
627 */
628int prcmu_set_rc_a2p(enum romcode_write val)
629{
630 if (val < RDY_2_DS || val > RDY_2_XP70_RST)
631 return -EINVAL;
632 writeb(val, (tcdm_base + PRCM_ROMCODE_A2P));
633 return 0;
634}
635
636/**
637 * prcmu_get_rc_p2a - This function is used to get power state sequences
638 * Returns: the power transition that has last happened
639 *
640 * This function can return the following transitions-
641 * any state to ApReset, ApDeepSleep to ApExecute, ApExecute to ApDeepSleep
642 */
643enum romcode_read prcmu_get_rc_p2a(void)
644{
645 return readb(tcdm_base + PRCM_ROMCODE_P2A);
646}
647
648/**
649 * prcmu_get_current_mode - Return the current XP70 power mode
650 * Returns: Returns the current AP(ARM) power mode: init,
651 * apBoot, apExecute, apDeepSleep, apSleep, apIdle, apReset
652 */
653enum ap_pwrst prcmu_get_xp70_current_state(void)
654{
655 return readb(tcdm_base + PRCM_XP70_CUR_PWR_STATE);
656}
657
658/**
659 * prcmu_config_clkout - Configure one of the programmable clock outputs.
660 * @clkout: The CLKOUT number (0 or 1).
661 * @source: The clock to be used (one of the PRCMU_CLKSRC_*).
662 * @div: The divider to be applied.
663 *
664 * Configures one of the programmable clock outputs (CLKOUTs).
665 * @div should be in the range [1,63] to request a configuration, or 0 to
666 * inform that the configuration is no longer requested.
667 */
668int prcmu_config_clkout(u8 clkout, u8 source, u8 div)
669{
670 static int requests[2];
671 int r = 0;
672 unsigned long flags;
673 u32 val;
674 u32 bits;
675 u32 mask;
676 u32 div_mask;
677
678 BUG_ON(clkout > 1);
679 BUG_ON(div > 63);
680 BUG_ON((clkout == 0) && (source > PRCMU_CLKSRC_CLK009));
681
682 if (!div && !requests[clkout])
683 return -EINVAL;
684
685 switch (clkout) {
686 case 0:
687 div_mask = PRCM_CLKOCR_CLKODIV0_MASK;
688 mask = (PRCM_CLKOCR_CLKODIV0_MASK | PRCM_CLKOCR_CLKOSEL0_MASK);
689 bits = ((source << PRCM_CLKOCR_CLKOSEL0_SHIFT) |
690 (div << PRCM_CLKOCR_CLKODIV0_SHIFT));
691 break;
692 case 1:
693 div_mask = PRCM_CLKOCR_CLKODIV1_MASK;
694 mask = (PRCM_CLKOCR_CLKODIV1_MASK | PRCM_CLKOCR_CLKOSEL1_MASK |
695 PRCM_CLKOCR_CLK1TYPE);
696 bits = ((source << PRCM_CLKOCR_CLKOSEL1_SHIFT) |
697 (div << PRCM_CLKOCR_CLKODIV1_SHIFT));
698 break;
699 }
700 bits &= mask;
701
702 spin_lock_irqsave(&clkout_lock, flags);
703
704 val = readl(_PRCMU_BASE + PRCM_CLKOCR);
705 if (val & div_mask) {
706 if (div) {
707 if ((val & mask) != bits) {
708 r = -EBUSY;
709 goto unlock_and_return;
710 }
711 } else {
712 if ((val & mask & ~div_mask) != bits) {
713 r = -EINVAL;
714 goto unlock_and_return;
715 }
716 }
717 }
718 writel((bits | (val & ~mask)), (_PRCMU_BASE + PRCM_CLKOCR));
719 requests[clkout] += (div ? 1 : -1);
720
721unlock_and_return:
722 spin_unlock_irqrestore(&clkout_lock, flags);
723
724 return r;
725}
726
727int prcmu_set_power_state(u8 state, bool keep_ulp_clk, bool keep_ap_pll)
728{
729 unsigned long flags;
730
731 BUG_ON((state < PRCMU_AP_SLEEP) || (PRCMU_AP_DEEP_IDLE < state));
732
733 spin_lock_irqsave(&mb0_transfer.lock, flags);
734
735 while (readl(_PRCMU_BASE + PRCM_MBOX_CPU_VAL) & MBOX_BIT(0))
736 cpu_relax();
737
738 writeb(MB0H_POWER_STATE_TRANS, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB0));
739 writeb(state, (tcdm_base + PRCM_REQ_MB0_AP_POWER_STATE));
740 writeb((keep_ap_pll ? 1 : 0), (tcdm_base + PRCM_REQ_MB0_AP_PLL_STATE));
741 writeb((keep_ulp_clk ? 1 : 0),
742 (tcdm_base + PRCM_REQ_MB0_ULP_CLOCK_STATE));
743 writeb(0, (tcdm_base + PRCM_REQ_MB0_DO_NOT_WFI));
744 writel(MBOX_BIT(0), (_PRCMU_BASE + PRCM_MBOX_CPU_SET));
745
746 spin_unlock_irqrestore(&mb0_transfer.lock, flags);
747
748 return 0;
749}
750
751/* This function should only be called while mb0_transfer.lock is held. */
752static void config_wakeups(void)
753{
754 const u8 header[2] = {
755 MB0H_CONFIG_WAKEUPS_EXE,
756 MB0H_CONFIG_WAKEUPS_SLEEP
757 };
758 static u32 last_dbb_events;
759 static u32 last_abb_events;
760 u32 dbb_events;
761 u32 abb_events;
762 unsigned int i;
763
764 dbb_events = mb0_transfer.req.dbb_irqs | mb0_transfer.req.dbb_wakeups;
765 dbb_events |= (WAKEUP_BIT_AC_WAKE_ACK | WAKEUP_BIT_AC_SLEEP_ACK);
766
767 abb_events = mb0_transfer.req.abb_events;
768
769 if ((dbb_events == last_dbb_events) && (abb_events == last_abb_events))
770 return;
771
772 for (i = 0; i < 2; i++) {
773 while (readl(_PRCMU_BASE + PRCM_MBOX_CPU_VAL) & MBOX_BIT(0))
774 cpu_relax();
775 writel(dbb_events, (tcdm_base + PRCM_REQ_MB0_WAKEUP_8500));
776 writel(abb_events, (tcdm_base + PRCM_REQ_MB0_WAKEUP_4500));
777 writeb(header[i], (tcdm_base + PRCM_MBOX_HEADER_REQ_MB0));
778 writel(MBOX_BIT(0), (_PRCMU_BASE + PRCM_MBOX_CPU_SET));
779 }
780 last_dbb_events = dbb_events;
781 last_abb_events = abb_events;
782}
783
784void prcmu_enable_wakeups(u32 wakeups)
785{
786 unsigned long flags;
787 u32 bits;
788 int i;
789
790 BUG_ON(wakeups != (wakeups & VALID_WAKEUPS));
791
792 for (i = 0, bits = 0; i < NUM_PRCMU_WAKEUP_INDICES; i++) {
793 if (wakeups & BIT(i))
794 bits |= prcmu_wakeup_bit[i];
795 }
796
797 spin_lock_irqsave(&mb0_transfer.lock, flags);
798
799 mb0_transfer.req.dbb_wakeups = bits;
800 config_wakeups();
801
802 spin_unlock_irqrestore(&mb0_transfer.lock, flags);
803}
804
805void prcmu_config_abb_event_readout(u32 abb_events)
806{
807 unsigned long flags;
808
809 spin_lock_irqsave(&mb0_transfer.lock, flags);
810
811 mb0_transfer.req.abb_events = abb_events;
812 config_wakeups();
813
814 spin_unlock_irqrestore(&mb0_transfer.lock, flags);
815}
816
817void prcmu_get_abb_event_buffer(void __iomem **buf)
818{
819 if (readb(tcdm_base + PRCM_ACK_MB0_READ_POINTER) & 1)
820 *buf = (tcdm_base + PRCM_ACK_MB0_WAKEUP_1_4500);
821 else
822 *buf = (tcdm_base + PRCM_ACK_MB0_WAKEUP_0_4500);
823}
824
825/**
826 * prcmu_set_arm_opp - set the appropriate ARM OPP
827 * @opp: The new ARM operating point to which transition is to be made
828 * Returns: 0 on success, non-zero on failure
829 *
830 * This function sets the the operating point of the ARM.
831 */
832int prcmu_set_arm_opp(u8 opp)
833{
834 int r;
835
836 if (opp < ARM_NO_CHANGE || opp > ARM_EXTCLK)
837 return -EINVAL;
838
839 r = 0;
840
841 mutex_lock(&mb1_transfer.lock);
842
843 while (readl(_PRCMU_BASE + PRCM_MBOX_CPU_VAL) & MBOX_BIT(1))
844 cpu_relax();
845
846 writeb(MB1H_ARM_APE_OPP, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB1));
847 writeb(opp, (tcdm_base + PRCM_REQ_MB1_ARM_OPP));
848 writeb(APE_NO_CHANGE, (tcdm_base + PRCM_REQ_MB1_APE_OPP));
849
850 writel(MBOX_BIT(1), (_PRCMU_BASE + PRCM_MBOX_CPU_SET));
851 wait_for_completion(&mb1_transfer.work);
852
853 if ((mb1_transfer.ack.header != MB1H_ARM_APE_OPP) ||
854 (mb1_transfer.ack.arm_opp != opp))
855 r = -EIO;
856
857 mutex_unlock(&mb1_transfer.lock);
858
859 return r;
860}
861
862/**
863 * prcmu_get_arm_opp - get the current ARM OPP
864 *
865 * Returns: the current ARM OPP
866 */
867int prcmu_get_arm_opp(void)
868{
869 return readb(tcdm_base + PRCM_ACK_MB1_CURRENT_ARM_OPP);
870}
871
872/**
873 * prcmu_get_ddr_opp - get the current DDR OPP
874 *
875 * Returns: the current DDR OPP
876 */
877int prcmu_get_ddr_opp(void)
878{
879 return readb(_PRCMU_BASE + PRCM_DDR_SUBSYS_APE_MINBW);
880}
881
882/**
883 * set_ddr_opp - set the appropriate DDR OPP
884 * @opp: The new DDR operating point to which transition is to be made
885 * Returns: 0 on success, non-zero on failure
886 *
887 * This function sets the operating point of the DDR.
888 */
889int prcmu_set_ddr_opp(u8 opp)
890{
891 if (opp < DDR_100_OPP || opp > DDR_25_OPP)
892 return -EINVAL;
893 /* Changing the DDR OPP can hang the hardware pre-v21 */
894 if (cpu_is_u8500v20_or_later() && !cpu_is_u8500v20())
895 writeb(opp, (_PRCMU_BASE + PRCM_DDR_SUBSYS_APE_MINBW));
896
897 return 0;
898}
899/**
900 * set_ape_opp - set the appropriate APE OPP
901 * @opp: The new APE operating point to which transition is to be made
902 * Returns: 0 on success, non-zero on failure
903 *
904 * This function sets the operating point of the APE.
905 */
906int prcmu_set_ape_opp(u8 opp)
907{
908 int r = 0;
909
910 mutex_lock(&mb1_transfer.lock);
911
912 while (readl(_PRCMU_BASE + PRCM_MBOX_CPU_VAL) & MBOX_BIT(1))
913 cpu_relax();
914
915 writeb(MB1H_ARM_APE_OPP, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB1));
916 writeb(ARM_NO_CHANGE, (tcdm_base + PRCM_REQ_MB1_ARM_OPP));
917 writeb(opp, (tcdm_base + PRCM_REQ_MB1_APE_OPP));
918
919 writel(MBOX_BIT(1), (_PRCMU_BASE + PRCM_MBOX_CPU_SET));
920 wait_for_completion(&mb1_transfer.work);
921
922 if ((mb1_transfer.ack.header != MB1H_ARM_APE_OPP) ||
923 (mb1_transfer.ack.ape_opp != opp))
924 r = -EIO;
925
926 mutex_unlock(&mb1_transfer.lock);
927
928 return r;
929}
930
931/**
932 * prcmu_get_ape_opp - get the current APE OPP
933 *
934 * Returns: the current APE OPP
935 */
936int prcmu_get_ape_opp(void)
937{
938 return readb(tcdm_base + PRCM_ACK_MB1_CURRENT_APE_OPP);
939}
940
941/**
942 * prcmu_request_ape_opp_100_voltage - Request APE OPP 100% voltage
943 * @enable: true to request the higher voltage, false to drop a request.
944 *
945 * Calls to this function to enable and disable requests must be balanced.
946 */
947int prcmu_request_ape_opp_100_voltage(bool enable)
948{
949 int r = 0;
950 u8 header;
951 static unsigned int requests;
952
953 mutex_lock(&mb1_transfer.lock);
954
955 if (enable) {
956 if (0 != requests++)
957 goto unlock_and_return;
958 header = MB1H_REQUEST_APE_OPP_100_VOLT;
959 } else {
960 if (requests == 0) {
961 r = -EIO;
962 goto unlock_and_return;
963 } else if (1 != requests--) {
964 goto unlock_and_return;
965 }
966 header = MB1H_RELEASE_APE_OPP_100_VOLT;
967 }
968
969 while (readl(_PRCMU_BASE + PRCM_MBOX_CPU_VAL) & MBOX_BIT(1))
970 cpu_relax();
971
972 writeb(header, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB1));
973
974 writel(MBOX_BIT(1), (_PRCMU_BASE + PRCM_MBOX_CPU_SET));
975 wait_for_completion(&mb1_transfer.work);
976
977 if ((mb1_transfer.ack.header != header) ||
978 ((mb1_transfer.ack.ape_voltage_status & BIT(0)) != 0))
979 r = -EIO;
980
981unlock_and_return:
982 mutex_unlock(&mb1_transfer.lock);
983
984 return r;
985}
986
987/**
988 * prcmu_release_usb_wakeup_state - release the state required by a USB wakeup
989 *
990 * This function releases the power state requirements of a USB wakeup.
991 */
992int prcmu_release_usb_wakeup_state(void)
993{
994 int r = 0;
995
996 mutex_lock(&mb1_transfer.lock);
997
998 while (readl(_PRCMU_BASE + PRCM_MBOX_CPU_VAL) & MBOX_BIT(1))
999 cpu_relax();
1000
1001 writeb(MB1H_RELEASE_USB_WAKEUP,
1002 (tcdm_base + PRCM_MBOX_HEADER_REQ_MB1));
1003
1004 writel(MBOX_BIT(1), (_PRCMU_BASE + PRCM_MBOX_CPU_SET));
1005 wait_for_completion(&mb1_transfer.work);
1006
1007 if ((mb1_transfer.ack.header != MB1H_RELEASE_USB_WAKEUP) ||
1008 ((mb1_transfer.ack.ape_voltage_status & BIT(0)) != 0))
1009 r = -EIO;
1010
1011 mutex_unlock(&mb1_transfer.lock);
1012
1013 return r;
1014}
1015
1016/**
1017 * prcmu_set_epod - set the state of a EPOD (power domain)
1018 * @epod_id: The EPOD to set
1019 * @epod_state: The new EPOD state
1020 *
1021 * This function sets the state of a EPOD (power domain). It may not be called
1022 * from interrupt context.
1023 */
1024int prcmu_set_epod(u16 epod_id, u8 epod_state)
1025{
1026 int r = 0;
1027 bool ram_retention = false;
1028 int i;
1029
1030 /* check argument */
1031 BUG_ON(epod_id >= NUM_EPOD_ID);
1032
1033 /* set flag if retention is possible */
1034 switch (epod_id) {
1035 case EPOD_ID_SVAMMDSP:
1036 case EPOD_ID_SIAMMDSP:
1037 case EPOD_ID_ESRAM12:
1038 case EPOD_ID_ESRAM34:
1039 ram_retention = true;
1040 break;
1041 }
1042
1043 /* check argument */
1044 BUG_ON(epod_state > EPOD_STATE_ON);
1045 BUG_ON(epod_state == EPOD_STATE_RAMRET && !ram_retention);
1046
1047 /* get lock */
1048 mutex_lock(&mb2_transfer.lock);
1049
1050 /* wait for mailbox */
1051 while (readl(_PRCMU_BASE + PRCM_MBOX_CPU_VAL) & MBOX_BIT(2))
1052 cpu_relax();
1053
1054 /* fill in mailbox */
1055 for (i = 0; i < NUM_EPOD_ID; i++)
1056 writeb(EPOD_STATE_NO_CHANGE, (tcdm_base + PRCM_REQ_MB2 + i));
1057 writeb(epod_state, (tcdm_base + PRCM_REQ_MB2 + epod_id));
1058
1059 writeb(MB2H_DPS, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB2));
1060
1061 writel(MBOX_BIT(2), (_PRCMU_BASE + PRCM_MBOX_CPU_SET));
1062
1063 /*
1064 * The current firmware version does not handle errors correctly,
1065 * and we cannot recover if there is an error.
1066 * This is expected to change when the firmware is updated.
1067 */
1068 if (!wait_for_completion_timeout(&mb2_transfer.work,
1069 msecs_to_jiffies(20000))) {
1070 pr_err("prcmu: %s timed out (20 s) waiting for a reply.\n",
1071 __func__);
1072 r = -EIO;
1073 goto unlock_and_return;
1074 }
1075
1076 if (mb2_transfer.ack.status != HWACC_PWR_ST_OK)
1077 r = -EIO;
1078
1079unlock_and_return:
1080 mutex_unlock(&mb2_transfer.lock);
1081 return r;
1082}
1083
1084/**
1085 * prcmu_configure_auto_pm - Configure autonomous power management.
1086 * @sleep: Configuration for ApSleep.
1087 * @idle: Configuration for ApIdle.
1088 */
1089void prcmu_configure_auto_pm(struct prcmu_auto_pm_config *sleep,
1090 struct prcmu_auto_pm_config *idle)
1091{
1092 u32 sleep_cfg;
1093 u32 idle_cfg;
1094 unsigned long flags;
1095
1096 BUG_ON((sleep == NULL) || (idle == NULL));
1097
1098 sleep_cfg = (sleep->sva_auto_pm_enable & 0xF);
1099 sleep_cfg = ((sleep_cfg << 4) | (sleep->sia_auto_pm_enable & 0xF));
1100 sleep_cfg = ((sleep_cfg << 8) | (sleep->sva_power_on & 0xFF));
1101 sleep_cfg = ((sleep_cfg << 8) | (sleep->sia_power_on & 0xFF));
1102 sleep_cfg = ((sleep_cfg << 4) | (sleep->sva_policy & 0xF));
1103 sleep_cfg = ((sleep_cfg << 4) | (sleep->sia_policy & 0xF));
1104
1105 idle_cfg = (idle->sva_auto_pm_enable & 0xF);
1106 idle_cfg = ((idle_cfg << 4) | (idle->sia_auto_pm_enable & 0xF));
1107 idle_cfg = ((idle_cfg << 8) | (idle->sva_power_on & 0xFF));
1108 idle_cfg = ((idle_cfg << 8) | (idle->sia_power_on & 0xFF));
1109 idle_cfg = ((idle_cfg << 4) | (idle->sva_policy & 0xF));
1110 idle_cfg = ((idle_cfg << 4) | (idle->sia_policy & 0xF));
1111
1112 spin_lock_irqsave(&mb2_transfer.auto_pm_lock, flags);
1113
1114 /*
1115 * The autonomous power management configuration is done through
1116 * fields in mailbox 2, but these fields are only used as shared
1117 * variables - i.e. there is no need to send a message.
1118 */
1119 writel(sleep_cfg, (tcdm_base + PRCM_REQ_MB2_AUTO_PM_SLEEP));
1120 writel(idle_cfg, (tcdm_base + PRCM_REQ_MB2_AUTO_PM_IDLE));
1121
1122 mb2_transfer.auto_pm_enabled =
1123 ((sleep->sva_auto_pm_enable == PRCMU_AUTO_PM_ON) ||
1124 (sleep->sia_auto_pm_enable == PRCMU_AUTO_PM_ON) ||
1125 (idle->sva_auto_pm_enable == PRCMU_AUTO_PM_ON) ||
1126 (idle->sia_auto_pm_enable == PRCMU_AUTO_PM_ON));
1127
1128 spin_unlock_irqrestore(&mb2_transfer.auto_pm_lock, flags);
1129}
1130EXPORT_SYMBOL(prcmu_configure_auto_pm);
1131
1132bool prcmu_is_auto_pm_enabled(void)
1133{
1134 return mb2_transfer.auto_pm_enabled;
1135}
1136
1137static int request_sysclk(bool enable)
1138{
1139 int r;
1140 unsigned long flags;
1141
1142 r = 0;
1143
1144 mutex_lock(&mb3_transfer.sysclk_lock);
1145
1146 spin_lock_irqsave(&mb3_transfer.lock, flags);
1147
1148 while (readl(_PRCMU_BASE + PRCM_MBOX_CPU_VAL) & MBOX_BIT(3))
1149 cpu_relax();
1150
1151 writeb((enable ? ON : OFF), (tcdm_base + PRCM_REQ_MB3_SYSCLK_MGT));
1152
1153 writeb(MB3H_SYSCLK, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB3));
1154 writel(MBOX_BIT(3), (_PRCMU_BASE + PRCM_MBOX_CPU_SET));
1155
1156 spin_unlock_irqrestore(&mb3_transfer.lock, flags);
1157
1158 /*
1159 * The firmware only sends an ACK if we want to enable the
1160 * SysClk, and it succeeds.
1161 */
1162 if (enable && !wait_for_completion_timeout(&mb3_transfer.sysclk_work,
1163 msecs_to_jiffies(20000))) {
1164 pr_err("prcmu: %s timed out (20 s) waiting for a reply.\n",
1165 __func__);
1166 r = -EIO;
1167 }
1168
1169 mutex_unlock(&mb3_transfer.sysclk_lock);
1170
1171 return r;
1172}
1173
1174static int request_timclk(bool enable)
1175{
1176 u32 val = (PRCM_TCR_DOZE_MODE | PRCM_TCR_TENSEL_MASK);
1177
1178 if (!enable)
1179 val |= PRCM_TCR_STOP_TIMERS;
1180 writel(val, (_PRCMU_BASE + PRCM_TCR));
1181
1182 return 0;
1183}
1184
1185static int request_reg_clock(u8 clock, bool enable)
1186{
1187 u32 val;
1188 unsigned long flags;
1189
1190 spin_lock_irqsave(&clk_mgt_lock, flags);
1191
1192 /* Grab the HW semaphore. */
1193 while ((readl(_PRCMU_BASE + PRCM_SEM) & PRCM_SEM_PRCM_SEM) != 0)
1194 cpu_relax();
1195
1196 val = readl(_PRCMU_BASE + clk_mgt[clock].offset);
1197 if (enable) {
1198 val |= (PRCM_CLK_MGT_CLKEN | clk_mgt[clock].pllsw);
1199 } else {
1200 clk_mgt[clock].pllsw = (val & PRCM_CLK_MGT_CLKPLLSW_MASK);
1201 val &= ~(PRCM_CLK_MGT_CLKEN | PRCM_CLK_MGT_CLKPLLSW_MASK);
1202 }
1203 writel(val, (_PRCMU_BASE + clk_mgt[clock].offset));
1204
1205 /* Release the HW semaphore. */
1206 writel(0, (_PRCMU_BASE + PRCM_SEM));
1207
1208 spin_unlock_irqrestore(&clk_mgt_lock, flags);
1209
1210 return 0;
1211}
1212
1213/**
1214 * prcmu_request_clock() - Request for a clock to be enabled or disabled.
1215 * @clock: The clock for which the request is made.
1216 * @enable: Whether the clock should be enabled (true) or disabled (false).
1217 *
1218 * This function should only be used by the clock implementation.
1219 * Do not use it from any other place!
1220 */
1221int prcmu_request_clock(u8 clock, bool enable)
1222{
1223 if (clock < PRCMU_NUM_REG_CLOCKS)
1224 return request_reg_clock(clock, enable);
1225 else if (clock == PRCMU_TIMCLK)
1226 return request_timclk(enable);
1227 else if (clock == PRCMU_SYSCLK)
1228 return request_sysclk(enable);
1229 else
1230 return -EINVAL;
1231}
1232
1233int prcmu_config_esram0_deep_sleep(u8 state)
1234{
1235 if ((state > ESRAM0_DEEP_SLEEP_STATE_RET) ||
1236 (state < ESRAM0_DEEP_SLEEP_STATE_OFF))
1237 return -EINVAL;
1238
1239 mutex_lock(&mb4_transfer.lock);
1240
1241 while (readl(_PRCMU_BASE + PRCM_MBOX_CPU_VAL) & MBOX_BIT(4))
1242 cpu_relax();
1243
1244 writeb(MB4H_MEM_ST, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB4));
1245 writeb(((DDR_PWR_STATE_OFFHIGHLAT << 4) | DDR_PWR_STATE_ON),
1246 (tcdm_base + PRCM_REQ_MB4_DDR_ST_AP_SLEEP_IDLE));
1247 writeb(DDR_PWR_STATE_ON,
1248 (tcdm_base + PRCM_REQ_MB4_DDR_ST_AP_DEEP_IDLE));
1249 writeb(state, (tcdm_base + PRCM_REQ_MB4_ESRAM0_ST));
1250
1251 writel(MBOX_BIT(4), (_PRCMU_BASE + PRCM_MBOX_CPU_SET));
1252 wait_for_completion(&mb4_transfer.work);
1253
1254 mutex_unlock(&mb4_transfer.lock);
1255
1256 return 0;
1257}
1258
1259int prcmu_config_hotdog(u8 threshold)
1260{
1261 mutex_lock(&mb4_transfer.lock);
1262
1263 while (readl(_PRCMU_BASE + PRCM_MBOX_CPU_VAL) & MBOX_BIT(4))
1264 cpu_relax();
1265
1266 writeb(threshold, (tcdm_base + PRCM_REQ_MB4_HOTDOG_THRESHOLD));
1267 writeb(MB4H_HOTDOG, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB4));
1268
1269 writel(MBOX_BIT(4), (_PRCMU_BASE + PRCM_MBOX_CPU_SET));
1270 wait_for_completion(&mb4_transfer.work);
1271
1272 mutex_unlock(&mb4_transfer.lock);
1273
1274 return 0;
1275}
1276
1277int prcmu_config_hotmon(u8 low, u8 high)
1278{
1279 mutex_lock(&mb4_transfer.lock);
1280
1281 while (readl(_PRCMU_BASE + PRCM_MBOX_CPU_VAL) & MBOX_BIT(4))
1282 cpu_relax();
1283
1284 writeb(low, (tcdm_base + PRCM_REQ_MB4_HOTMON_LOW));
1285 writeb(high, (tcdm_base + PRCM_REQ_MB4_HOTMON_HIGH));
1286 writeb((HOTMON_CONFIG_LOW | HOTMON_CONFIG_HIGH),
1287 (tcdm_base + PRCM_REQ_MB4_HOTMON_CONFIG));
1288 writeb(MB4H_HOTMON, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB4));
1289
1290 writel(MBOX_BIT(4), (_PRCMU_BASE + PRCM_MBOX_CPU_SET));
1291 wait_for_completion(&mb4_transfer.work);
1292
1293 mutex_unlock(&mb4_transfer.lock);
1294
1295 return 0;
1296}
1297
1298static int config_hot_period(u16 val)
1299{
1300 mutex_lock(&mb4_transfer.lock);
1301
1302 while (readl(_PRCMU_BASE + PRCM_MBOX_CPU_VAL) & MBOX_BIT(4))
1303 cpu_relax();
1304
1305 writew(val, (tcdm_base + PRCM_REQ_MB4_HOT_PERIOD));
1306 writeb(MB4H_HOT_PERIOD, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB4));
1307
1308 writel(MBOX_BIT(4), (_PRCMU_BASE + PRCM_MBOX_CPU_SET));
1309 wait_for_completion(&mb4_transfer.work);
1310
1311 mutex_unlock(&mb4_transfer.lock);
1312
1313 return 0;
1314}
1315
1316int prcmu_start_temp_sense(u16 cycles32k)
1317{
1318 if (cycles32k == 0xFFFF)
1319 return -EINVAL;
1320
1321 return config_hot_period(cycles32k);
1322}
1323
1324int prcmu_stop_temp_sense(void)
1325{
1326 return config_hot_period(0xFFFF);
1327}
1328
1329/**
1330 * prcmu_set_clock_divider() - Configure the clock divider.
1331 * @clock: The clock for which the request is made.
1332 * @divider: The clock divider. (< 32)
1333 *
1334 * This function should only be used by the clock implementation.
1335 * Do not use it from any other place!
1336 */
1337int prcmu_set_clock_divider(u8 clock, u8 divider)
1338{
1339 u32 val;
1340 unsigned long flags;
1341
1342 if ((clock >= PRCMU_NUM_REG_CLOCKS) || (divider < 1) || (31 < divider))
1343 return -EINVAL;
1344
1345 spin_lock_irqsave(&clk_mgt_lock, flags);
1346
1347 /* Grab the HW semaphore. */
1348 while ((readl(_PRCMU_BASE + PRCM_SEM) & PRCM_SEM_PRCM_SEM) != 0)
1349 cpu_relax();
1350
1351 val = readl(_PRCMU_BASE + clk_mgt[clock].offset);
1352 val &= ~(PRCM_CLK_MGT_CLKPLLDIV_MASK);
1353 val |= (u32)divider;
1354 writel(val, (_PRCMU_BASE + clk_mgt[clock].offset));
1355
1356 /* Release the HW semaphore. */
1357 writel(0, (_PRCMU_BASE + PRCM_SEM));
1358
1359 spin_unlock_irqrestore(&clk_mgt_lock, flags);
1360
1361 return 0;
1362}
1363
1364/**
1365 * prcmu_abb_read() - Read register value(s) from the ABB.
1366 * @slave: The I2C slave address.
1367 * @reg: The (start) register address.
1368 * @value: The read out value(s).
1369 * @size: The number of registers to read.
1370 *
1371 * Reads register value(s) from the ABB.
1372 * @size has to be 1 for the current firmware version.
1373 */
1374int prcmu_abb_read(u8 slave, u8 reg, u8 *value, u8 size)
1375{
1376 int r;
1377
1378 if (size != 1)
1379 return -EINVAL;
1380
1381 mutex_lock(&mb5_transfer.lock);
1382
1383 while (readl(_PRCMU_BASE + PRCM_MBOX_CPU_VAL) & MBOX_BIT(5))
1384 cpu_relax();
1385
1386 writeb(PRCMU_I2C_READ(slave), (tcdm_base + PRCM_REQ_MB5_I2C_SLAVE_OP));
1387 writeb(PRCMU_I2C_STOP_EN, (tcdm_base + PRCM_REQ_MB5_I2C_HW_BITS));
1388 writeb(reg, (tcdm_base + PRCM_REQ_MB5_I2C_REG));
1389 writeb(0, (tcdm_base + PRCM_REQ_MB5_I2C_VAL));
1390
1391 writel(MBOX_BIT(5), (_PRCMU_BASE + PRCM_MBOX_CPU_SET));
1392
1393 if (!wait_for_completion_timeout(&mb5_transfer.work,
1394 msecs_to_jiffies(20000))) {
1395 pr_err("prcmu: %s timed out (20 s) waiting for a reply.\n",
1396 __func__);
1397 r = -EIO;
1398 } else {
1399 r = ((mb5_transfer.ack.status == I2C_RD_OK) ? 0 : -EIO);
1400 }
1401
1402 if (!r)
1403 *value = mb5_transfer.ack.value;
1404
1405 mutex_unlock(&mb5_transfer.lock);
1406
1407 return r;
1408}
1409
1410/**
1411 * prcmu_abb_write() - Write register value(s) to the ABB.
1412 * @slave: The I2C slave address.
1413 * @reg: The (start) register address.
1414 * @value: The value(s) to write.
1415 * @size: The number of registers to write.
1416 *
1417 * Reads register value(s) from the ABB.
1418 * @size has to be 1 for the current firmware version.
1419 */
1420int prcmu_abb_write(u8 slave, u8 reg, u8 *value, u8 size)
1421{
1422 int r;
1423
1424 if (size != 1)
1425 return -EINVAL;
1426
1427 mutex_lock(&mb5_transfer.lock);
1428
1429 while (readl(_PRCMU_BASE + PRCM_MBOX_CPU_VAL) & MBOX_BIT(5))
1430 cpu_relax();
1431
1432 writeb(PRCMU_I2C_WRITE(slave), (tcdm_base + PRCM_REQ_MB5_I2C_SLAVE_OP));
1433 writeb(PRCMU_I2C_STOP_EN, (tcdm_base + PRCM_REQ_MB5_I2C_HW_BITS));
1434 writeb(reg, (tcdm_base + PRCM_REQ_MB5_I2C_REG));
1435 writeb(*value, (tcdm_base + PRCM_REQ_MB5_I2C_VAL));
1436
1437 writel(MBOX_BIT(5), (_PRCMU_BASE + PRCM_MBOX_CPU_SET));
1438
1439 if (!wait_for_completion_timeout(&mb5_transfer.work,
1440 msecs_to_jiffies(20000))) {
1441 pr_err("prcmu: %s timed out (20 s) waiting for a reply.\n",
1442 __func__);
1443 r = -EIO;
1444 } else {
1445 r = ((mb5_transfer.ack.status == I2C_WR_OK) ? 0 : -EIO);
1446 }
1447
1448 mutex_unlock(&mb5_transfer.lock);
1449
1450 return r;
1451}
1452
1453/**
1454 * prcmu_ac_wake_req - should be called whenever ARM wants to wakeup Modem
1455 */
1456void prcmu_ac_wake_req(void)
1457{
1458 u32 val;
1459
1460 mutex_lock(&mb0_transfer.ac_wake_lock);
1461
1462 val = readl(_PRCMU_BASE + PRCM_HOSTACCESS_REQ);
1463 if (val & PRCM_HOSTACCESS_REQ_HOSTACCESS_REQ)
1464 goto unlock_and_return;
1465
1466 atomic_set(&ac_wake_req_state, 1);
1467
1468 writel((val | PRCM_HOSTACCESS_REQ_HOSTACCESS_REQ),
1469 (_PRCMU_BASE + PRCM_HOSTACCESS_REQ));
1470
1471 if (!wait_for_completion_timeout(&mb0_transfer.ac_wake_work,
1472 msecs_to_jiffies(20000))) {
1473 pr_err("prcmu: %s timed out (20 s) waiting for a reply.\n",
1474 __func__);
1475 }
1476
1477unlock_and_return:
1478 mutex_unlock(&mb0_transfer.ac_wake_lock);
1479}
1480
1481/**
1482 * prcmu_ac_sleep_req - called when ARM no longer needs to talk to modem
1483 */
1484void prcmu_ac_sleep_req()
1485{
1486 u32 val;
1487
1488 mutex_lock(&mb0_transfer.ac_wake_lock);
1489
1490 val = readl(_PRCMU_BASE + PRCM_HOSTACCESS_REQ);
1491 if (!(val & PRCM_HOSTACCESS_REQ_HOSTACCESS_REQ))
1492 goto unlock_and_return;
1493
1494 writel((val & ~PRCM_HOSTACCESS_REQ_HOSTACCESS_REQ),
1495 (_PRCMU_BASE + PRCM_HOSTACCESS_REQ));
1496
1497 if (!wait_for_completion_timeout(&mb0_transfer.ac_wake_work,
1498 msecs_to_jiffies(20000))) {
1499 pr_err("prcmu: %s timed out (20 s) waiting for a reply.\n",
1500 __func__);
1501 }
1502
1503 atomic_set(&ac_wake_req_state, 0);
1504
1505unlock_and_return:
1506 mutex_unlock(&mb0_transfer.ac_wake_lock);
1507}
1508
1509bool prcmu_is_ac_wake_requested(void)
1510{
1511 return (atomic_read(&ac_wake_req_state) != 0);
1512}
1513
1514/**
1515 * prcmu_system_reset - System reset
1516 *
1517 * Saves the reset reason code and then sets the APE_SOFRST register which
1518 * fires interrupt to fw
1519 */
1520void prcmu_system_reset(u16 reset_code)
1521{
1522 writew(reset_code, (tcdm_base + PRCM_SW_RST_REASON));
1523 writel(1, (_PRCMU_BASE + PRCM_APE_SOFTRST));
1524}
1525
1526/**
1527 * prcmu_reset_modem - ask the PRCMU to reset modem
1528 */
1529void prcmu_modem_reset(void)
1530{
1531 mutex_lock(&mb1_transfer.lock);
1532
1533 while (readl(_PRCMU_BASE + PRCM_MBOX_CPU_VAL) & MBOX_BIT(1))
1534 cpu_relax();
1535
1536 writeb(MB1H_RESET_MODEM, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB1));
1537 writel(MBOX_BIT(1), (_PRCMU_BASE + PRCM_MBOX_CPU_SET));
1538 wait_for_completion(&mb1_transfer.work);
1539
1540 /*
1541 * No need to check return from PRCMU as modem should go in reset state
1542 * This state is already managed by upper layer
1543 */
1544
1545 mutex_unlock(&mb1_transfer.lock);
1546}
1547
1548static void ack_dbb_wakeup(void)
1549{
1550 unsigned long flags;
1551
1552 spin_lock_irqsave(&mb0_transfer.lock, flags);
1553
1554 while (readl(_PRCMU_BASE + PRCM_MBOX_CPU_VAL) & MBOX_BIT(0))
1555 cpu_relax();
1556
1557 writeb(MB0H_READ_WAKEUP_ACK, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB0));
1558 writel(MBOX_BIT(0), (_PRCMU_BASE + PRCM_MBOX_CPU_SET));
1559
1560 spin_unlock_irqrestore(&mb0_transfer.lock, flags);
1561}
1562
1563static inline void print_unknown_header_warning(u8 n, u8 header)
1564{
1565 pr_warning("prcmu: Unknown message header (%d) in mailbox %d.\n",
1566 header, n);
1567}
1568
1569static bool read_mailbox_0(void)
1570{
1571 bool r;
1572 u32 ev;
1573 unsigned int n;
1574 u8 header;
1575
1576 header = readb(tcdm_base + PRCM_MBOX_HEADER_ACK_MB0);
1577 switch (header) {
1578 case MB0H_WAKEUP_EXE:
1579 case MB0H_WAKEUP_SLEEP:
1580 if (readb(tcdm_base + PRCM_ACK_MB0_READ_POINTER) & 1)
1581 ev = readl(tcdm_base + PRCM_ACK_MB0_WAKEUP_1_8500);
1582 else
1583 ev = readl(tcdm_base + PRCM_ACK_MB0_WAKEUP_0_8500);
1584
1585 if (ev & (WAKEUP_BIT_AC_WAKE_ACK | WAKEUP_BIT_AC_SLEEP_ACK))
1586 complete(&mb0_transfer.ac_wake_work);
1587 if (ev & WAKEUP_BIT_SYSCLK_OK)
1588 complete(&mb3_transfer.sysclk_work);
1589
1590 ev &= mb0_transfer.req.dbb_irqs;
1591
1592 for (n = 0; n < NUM_PRCMU_WAKEUPS; n++) {
1593 if (ev & prcmu_irq_bit[n])
1594 generic_handle_irq(IRQ_PRCMU_BASE + n);
1595 }
1596 r = true;
1597 break;
1598 default:
1599 print_unknown_header_warning(0, header);
1600 r = false;
1601 break;
1602 }
1603 writel(MBOX_BIT(0), (_PRCMU_BASE + PRCM_ARM_IT1_CLR));
1604 return r;
1605}
1606
1607static bool read_mailbox_1(void)
1608{
1609 mb1_transfer.ack.header = readb(tcdm_base + PRCM_MBOX_HEADER_REQ_MB1);
1610 mb1_transfer.ack.arm_opp = readb(tcdm_base +
1611 PRCM_ACK_MB1_CURRENT_ARM_OPP);
1612 mb1_transfer.ack.ape_opp = readb(tcdm_base +
1613 PRCM_ACK_MB1_CURRENT_APE_OPP);
1614 mb1_transfer.ack.ape_voltage_status = readb(tcdm_base +
1615 PRCM_ACK_MB1_APE_VOLTAGE_STATUS);
1616 writel(MBOX_BIT(1), (_PRCMU_BASE + PRCM_ARM_IT1_CLR));
1617 complete(&mb1_transfer.work);
1618 return false;
1619}
1620
1621static bool read_mailbox_2(void)
1622{
1623 mb2_transfer.ack.status = readb(tcdm_base + PRCM_ACK_MB2_DPS_STATUS);
1624 writel(MBOX_BIT(2), (_PRCMU_BASE + PRCM_ARM_IT1_CLR));
1625 complete(&mb2_transfer.work);
1626 return false;
1627}
1628
1629static bool read_mailbox_3(void)
1630{
1631 writel(MBOX_BIT(3), (_PRCMU_BASE + PRCM_ARM_IT1_CLR));
1632 return false;
1633}
1634
1635static bool read_mailbox_4(void)
1636{
1637 u8 header;
1638 bool do_complete = true;
1639
1640 header = readb(tcdm_base + PRCM_MBOX_HEADER_REQ_MB4);
1641 switch (header) {
1642 case MB4H_MEM_ST:
1643 case MB4H_HOTDOG:
1644 case MB4H_HOTMON:
1645 case MB4H_HOT_PERIOD:
1646 break;
1647 default:
1648 print_unknown_header_warning(4, header);
1649 do_complete = false;
1650 break;
1651 }
1652
1653 writel(MBOX_BIT(4), (_PRCMU_BASE + PRCM_ARM_IT1_CLR));
1654
1655 if (do_complete)
1656 complete(&mb4_transfer.work);
1657
1658 return false;
1659}
1660
1661static bool read_mailbox_5(void)
1662{
1663 mb5_transfer.ack.status = readb(tcdm_base + PRCM_ACK_MB5_I2C_STATUS);
1664 mb5_transfer.ack.value = readb(tcdm_base + PRCM_ACK_MB5_I2C_VAL);
1665 writel(MBOX_BIT(5), (_PRCMU_BASE + PRCM_ARM_IT1_CLR));
1666 complete(&mb5_transfer.work);
1667 return false;
1668}
1669
1670static bool read_mailbox_6(void)
1671{
1672 writel(MBOX_BIT(6), (_PRCMU_BASE + PRCM_ARM_IT1_CLR));
1673 return false;
1674}
1675
1676static bool read_mailbox_7(void)
1677{
1678 writel(MBOX_BIT(7), (_PRCMU_BASE + PRCM_ARM_IT1_CLR));
1679 return false;
1680}
1681
1682static bool (* const read_mailbox[NUM_MB])(void) = {
1683 read_mailbox_0,
1684 read_mailbox_1,
1685 read_mailbox_2,
1686 read_mailbox_3,
1687 read_mailbox_4,
1688 read_mailbox_5,
1689 read_mailbox_6,
1690 read_mailbox_7
1691};
1692
1693static irqreturn_t prcmu_irq_handler(int irq, void *data)
1694{
1695 u32 bits;
1696 u8 n;
1697 irqreturn_t r;
1698
1699 bits = (readl(_PRCMU_BASE + PRCM_ARM_IT1_VAL) & ALL_MBOX_BITS);
1700 if (unlikely(!bits))
1701 return IRQ_NONE;
1702
1703 r = IRQ_HANDLED;
1704 for (n = 0; bits; n++) {
1705 if (bits & MBOX_BIT(n)) {
1706 bits -= MBOX_BIT(n);
1707 if (read_mailbox[n]())
1708 r = IRQ_WAKE_THREAD;
1709 }
1710 }
1711 return r;
1712}
1713
1714static irqreturn_t prcmu_irq_thread_fn(int irq, void *data)
1715{
1716 ack_dbb_wakeup();
1717 return IRQ_HANDLED;
1718}
1719
1720static void prcmu_mask_work(struct work_struct *work)
1721{
1722 unsigned long flags;
1723
1724 spin_lock_irqsave(&mb0_transfer.lock, flags);
1725
1726 config_wakeups();
1727
1728 spin_unlock_irqrestore(&mb0_transfer.lock, flags);
1729}
1730
1731static void prcmu_irq_mask(struct irq_data *d)
1732{
1733 unsigned long flags;
1734
1735 spin_lock_irqsave(&mb0_transfer.dbb_irqs_lock, flags);
1736
1737 mb0_transfer.req.dbb_irqs &= ~prcmu_irq_bit[d->irq - IRQ_PRCMU_BASE];
1738
1739 spin_unlock_irqrestore(&mb0_transfer.dbb_irqs_lock, flags);
1740
1741 if (d->irq != IRQ_PRCMU_CA_SLEEP)
1742 schedule_work(&mb0_transfer.mask_work);
1743}
1744
1745static void prcmu_irq_unmask(struct irq_data *d)
1746{
1747 unsigned long flags;
1748
1749 spin_lock_irqsave(&mb0_transfer.dbb_irqs_lock, flags);
1750
1751 mb0_transfer.req.dbb_irqs |= prcmu_irq_bit[d->irq - IRQ_PRCMU_BASE];
1752
1753 spin_unlock_irqrestore(&mb0_transfer.dbb_irqs_lock, flags);
1754
1755 if (d->irq != IRQ_PRCMU_CA_SLEEP)
1756 schedule_work(&mb0_transfer.mask_work);
1757}
1758
1759static void noop(struct irq_data *d)
1760{
1761}
1762
1763static struct irq_chip prcmu_irq_chip = {
1764 .name = "prcmu",
1765 .irq_disable = prcmu_irq_mask,
1766 .irq_ack = noop,
1767 .irq_mask = prcmu_irq_mask,
1768 .irq_unmask = prcmu_irq_unmask,
1769};
1770
1771void __init prcmu_early_init(void)
1772{
1773 unsigned int i;
1774
1775 if (cpu_is_u8500v1()) {
1776 tcdm_base = __io_address(U8500_PRCMU_TCDM_BASE_V1);
1777 } else if (cpu_is_u8500v2()) {
1778 void *tcpm_base = ioremap_nocache(U8500_PRCMU_TCPM_BASE, SZ_4K);
1779
1780 if (tcpm_base != NULL) {
1781 int version;
1782 version = readl(tcpm_base + PRCMU_FW_VERSION_OFFSET);
1783 prcmu_version.project_number = version & 0xFF;
1784 prcmu_version.api_version = (version >> 8) & 0xFF;
1785 prcmu_version.func_version = (version >> 16) & 0xFF;
1786 prcmu_version.errata = (version >> 24) & 0xFF;
1787 pr_info("PRCMU firmware version %d.%d.%d\n",
1788 (version >> 8) & 0xFF, (version >> 16) & 0xFF,
1789 (version >> 24) & 0xFF);
1790 iounmap(tcpm_base);
1791 }
1792
1793 tcdm_base = __io_address(U8500_PRCMU_TCDM_BASE);
1794 } else {
1795 pr_err("prcmu: Unsupported chip version\n");
1796 BUG();
1797 }
1798
1799 spin_lock_init(&mb0_transfer.lock);
1800 spin_lock_init(&mb0_transfer.dbb_irqs_lock);
1801 mutex_init(&mb0_transfer.ac_wake_lock);
1802 init_completion(&mb0_transfer.ac_wake_work);
1803 mutex_init(&mb1_transfer.lock);
1804 init_completion(&mb1_transfer.work);
1805 mutex_init(&mb2_transfer.lock);
1806 init_completion(&mb2_transfer.work);
1807 spin_lock_init(&mb2_transfer.auto_pm_lock);
1808 spin_lock_init(&mb3_transfer.lock);
1809 mutex_init(&mb3_transfer.sysclk_lock);
1810 init_completion(&mb3_transfer.sysclk_work);
1811 mutex_init(&mb4_transfer.lock);
1812 init_completion(&mb4_transfer.work);
1813 mutex_init(&mb5_transfer.lock);
1814 init_completion(&mb5_transfer.work);
1815
1816 INIT_WORK(&mb0_transfer.mask_work, prcmu_mask_work);
1817
1818 /* Initalize irqs. */
1819 for (i = 0; i < NUM_PRCMU_WAKEUPS; i++) {
1820 unsigned int irq;
1821
1822 irq = IRQ_PRCMU_BASE + i;
1823 irq_set_chip_and_handler(irq, &prcmu_irq_chip,
1824 handle_simple_irq);
1825 set_irq_flags(irq, IRQF_VALID);
1826 }
1827}
1828
1829/*
1830 * Power domain switches (ePODs) modeled as regulators for the DB8500 SoC
1831 */
1832static struct regulator_consumer_supply db8500_vape_consumers[] = {
1833 REGULATOR_SUPPLY("v-ape", NULL),
1834 REGULATOR_SUPPLY("v-i2c", "nmk-i2c.0"),
1835 REGULATOR_SUPPLY("v-i2c", "nmk-i2c.1"),
1836 REGULATOR_SUPPLY("v-i2c", "nmk-i2c.2"),
1837 REGULATOR_SUPPLY("v-i2c", "nmk-i2c.3"),
1838 /* "v-mmc" changed to "vcore" in the mainline kernel */
1839 REGULATOR_SUPPLY("vcore", "sdi0"),
1840 REGULATOR_SUPPLY("vcore", "sdi1"),
1841 REGULATOR_SUPPLY("vcore", "sdi2"),
1842 REGULATOR_SUPPLY("vcore", "sdi3"),
1843 REGULATOR_SUPPLY("vcore", "sdi4"),
1844 REGULATOR_SUPPLY("v-dma", "dma40.0"),
1845 REGULATOR_SUPPLY("v-ape", "ab8500-usb.0"),
1846 /* "v-uart" changed to "vcore" in the mainline kernel */
1847 REGULATOR_SUPPLY("vcore", "uart0"),
1848 REGULATOR_SUPPLY("vcore", "uart1"),
1849 REGULATOR_SUPPLY("vcore", "uart2"),
1850 REGULATOR_SUPPLY("v-ape", "nmk-ske-keypad.0"),
1851};
1852
1853static struct regulator_consumer_supply db8500_vsmps2_consumers[] = {
1854 /* CG2900 and CW1200 power to off-chip peripherals */
1855 REGULATOR_SUPPLY("gbf_1v8", "cg2900-uart.0"),
1856 REGULATOR_SUPPLY("wlan_1v8", "cw1200.0"),
1857 REGULATOR_SUPPLY("musb_1v8", "ab8500-usb.0"),
1858 /* AV8100 regulator */
1859 REGULATOR_SUPPLY("hdmi_1v8", "0-0070"),
1860};
1861
1862static struct regulator_consumer_supply db8500_b2r2_mcde_consumers[] = {
1863 REGULATOR_SUPPLY("vsupply", "b2r2.0"),
1864 REGULATOR_SUPPLY("vsupply", "mcde.0"),
1865};
1866
1867static struct regulator_init_data db8500_regulators[DB8500_NUM_REGULATORS] = {
1868 [DB8500_REGULATOR_VAPE] = {
1869 .constraints = {
1870 .name = "db8500-vape",
1871 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
1872 },
1873 .consumer_supplies = db8500_vape_consumers,
1874 .num_consumer_supplies = ARRAY_SIZE(db8500_vape_consumers),
1875 },
1876 [DB8500_REGULATOR_VARM] = {
1877 .constraints = {
1878 .name = "db8500-varm",
1879 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
1880 },
1881 },
1882 [DB8500_REGULATOR_VMODEM] = {
1883 .constraints = {
1884 .name = "db8500-vmodem",
1885 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
1886 },
1887 },
1888 [DB8500_REGULATOR_VPLL] = {
1889 .constraints = {
1890 .name = "db8500-vpll",
1891 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
1892 },
1893 },
1894 [DB8500_REGULATOR_VSMPS1] = {
1895 .constraints = {
1896 .name = "db8500-vsmps1",
1897 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
1898 },
1899 },
1900 [DB8500_REGULATOR_VSMPS2] = {
1901 .constraints = {
1902 .name = "db8500-vsmps2",
1903 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
1904 },
1905 .consumer_supplies = db8500_vsmps2_consumers,
1906 .num_consumer_supplies = ARRAY_SIZE(db8500_vsmps2_consumers),
1907 },
1908 [DB8500_REGULATOR_VSMPS3] = {
1909 .constraints = {
1910 .name = "db8500-vsmps3",
1911 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
1912 },
1913 },
1914 [DB8500_REGULATOR_VRF1] = {
1915 .constraints = {
1916 .name = "db8500-vrf1",
1917 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
1918 },
1919 },
1920 [DB8500_REGULATOR_SWITCH_SVAMMDSP] = {
1921 .supply_regulator = "db8500-vape",
1922 .constraints = {
1923 .name = "db8500-sva-mmdsp",
1924 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
1925 },
1926 },
1927 [DB8500_REGULATOR_SWITCH_SVAMMDSPRET] = {
1928 .constraints = {
1929 /* "ret" means "retention" */
1930 .name = "db8500-sva-mmdsp-ret",
1931 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
1932 },
1933 },
1934 [DB8500_REGULATOR_SWITCH_SVAPIPE] = {
1935 .supply_regulator = "db8500-vape",
1936 .constraints = {
1937 .name = "db8500-sva-pipe",
1938 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
1939 },
1940 },
1941 [DB8500_REGULATOR_SWITCH_SIAMMDSP] = {
1942 .supply_regulator = "db8500-vape",
1943 .constraints = {
1944 .name = "db8500-sia-mmdsp",
1945 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
1946 },
1947 },
1948 [DB8500_REGULATOR_SWITCH_SIAMMDSPRET] = {
1949 .constraints = {
1950 .name = "db8500-sia-mmdsp-ret",
1951 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
1952 },
1953 },
1954 [DB8500_REGULATOR_SWITCH_SIAPIPE] = {
1955 .supply_regulator = "db8500-vape",
1956 .constraints = {
1957 .name = "db8500-sia-pipe",
1958 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
1959 },
1960 },
1961 [DB8500_REGULATOR_SWITCH_SGA] = {
1962 .supply_regulator = "db8500-vape",
1963 .constraints = {
1964 .name = "db8500-sga",
1965 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
1966 },
1967 },
1968 [DB8500_REGULATOR_SWITCH_B2R2_MCDE] = {
1969 .supply_regulator = "db8500-vape",
1970 .constraints = {
1971 .name = "db8500-b2r2-mcde",
1972 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
1973 },
1974 .consumer_supplies = db8500_b2r2_mcde_consumers,
1975 .num_consumer_supplies = ARRAY_SIZE(db8500_b2r2_mcde_consumers),
1976 },
1977 [DB8500_REGULATOR_SWITCH_ESRAM12] = {
1978 .supply_regulator = "db8500-vape",
1979 .constraints = {
1980 .name = "db8500-esram12",
1981 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
1982 },
1983 },
1984 [DB8500_REGULATOR_SWITCH_ESRAM12RET] = {
1985 .constraints = {
1986 .name = "db8500-esram12-ret",
1987 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
1988 },
1989 },
1990 [DB8500_REGULATOR_SWITCH_ESRAM34] = {
1991 .supply_regulator = "db8500-vape",
1992 .constraints = {
1993 .name = "db8500-esram34",
1994 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
1995 },
1996 },
1997 [DB8500_REGULATOR_SWITCH_ESRAM34RET] = {
1998 .constraints = {
1999 .name = "db8500-esram34-ret",
2000 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
2001 },
2002 },
2003};
2004
2005static struct mfd_cell db8500_prcmu_devs[] = {
2006 {
2007 .name = "db8500-prcmu-regulators",
2008 .mfd_data = &db8500_regulators,
2009 },
2010 {
2011 .name = "cpufreq-u8500",
2012 },
2013};
2014
2015/**
2016 * prcmu_fw_init - arch init call for the Linux PRCMU fw init logic
2017 *
2018 */
2019static int __init db8500_prcmu_probe(struct platform_device *pdev)
2020{
2021 int err = 0;
2022
2023 if (ux500_is_svp())
2024 return -ENODEV;
2025
2026 /* Clean up the mailbox interrupts after pre-kernel code. */
2027 writel(ALL_MBOX_BITS, (_PRCMU_BASE + PRCM_ARM_IT1_CLR));
2028
2029 err = request_threaded_irq(IRQ_DB8500_PRCMU1, prcmu_irq_handler,
2030 prcmu_irq_thread_fn, IRQF_NO_SUSPEND, "prcmu", NULL);
2031 if (err < 0) {
2032 pr_err("prcmu: Failed to allocate IRQ_DB8500_PRCMU1.\n");
2033 err = -EBUSY;
2034 goto no_irq_return;
2035 }
2036
2037 if (cpu_is_u8500v20_or_later())
2038 prcmu_config_esram0_deep_sleep(ESRAM0_DEEP_SLEEP_STATE_RET);
2039
2040 err = mfd_add_devices(&pdev->dev, 0, db8500_prcmu_devs,
2041 ARRAY_SIZE(db8500_prcmu_devs), NULL,
2042 0);
2043
2044 if (err)
2045 pr_err("prcmu: Failed to add subdevices\n");
2046 else
2047 pr_info("DB8500 PRCMU initialized\n");
2048
2049no_irq_return:
2050 return err;
2051}
2052
2053static struct platform_driver db8500_prcmu_driver = {
2054 .driver = {
2055 .name = "db8500-prcmu",
2056 .owner = THIS_MODULE,
2057 },
2058};
2059
2060static int __init db8500_prcmu_init(void)
2061{
2062 return platform_driver_probe(&db8500_prcmu_driver, db8500_prcmu_probe);
2063}
2064
2065arch_initcall(db8500_prcmu_init);
2066
2067MODULE_AUTHOR("Mattias Nilsson <mattias.i.nilsson@stericsson.com>");
2068MODULE_DESCRIPTION("DB8500 PRCM Unit driver");
2069MODULE_LICENSE("GPL v2");
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-20 22:16:47 -0500