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authorLinus Walleij <linus.walleij@linaro.org>2011-05-15 16:53:56 -0400
committerLinus Walleij <linus.walleij@linaro.org>2011-05-24 16:14:31 -0400
commit650c2a2145981696c414be1d540a32447d0e353e (patch)
treef05aadb054bffb88fee3056b78310b148ceed9bf /arch
parent118718905de6e32c11e09a8f41c7abff6155ba19 (diff)
mach-ux500: move the DB8500 PRCMU driver to MFD
We have decided that this function arbiter fits better in the MFD subsystem. Since we need to concatenate the split header files we move it basically like this: mv mach-ux500/prcmu-db8500.c drivers/mfd/db8500-prcmu.c mv mach-ux500/include/mach/prcmu-defs.h include/linux/mfd/db8500-prcmu.h mv mach-ux500/include/mach/prcmu-regs.h drivers/mfd/db8500-prcmu-regs.h mach-ux500/include/mach/prcmu.h >> include/linux/mfd/db8500-prcmu.h rm arch/arm/mach-ux500/include/mach/prcmu.h Then we update different #include statements and Makefile orders etc to make the PRCMU driver compile, link and boot in the new place without really changing any code. Acked-by: Samuel Ortiz <sameo@linux.intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mach-ux500/Kconfig1
-rw-r--r--arch/arm/mach-ux500/Makefile2
-rw-r--r--arch/arm/mach-ux500/cpu.c2
-rw-r--r--arch/arm/mach-ux500/cpufreq.c3
-rw-r--r--arch/arm/mach-ux500/include/mach/prcmu-defs.h30
-rw-r--r--arch/arm/mach-ux500/include/mach/prcmu-regs.h94
-rw-r--r--arch/arm/mach-ux500/include/mach/prcmu.h28
-rw-r--r--arch/arm/mach-ux500/prcmu-db8500.c394
8 files changed, 4 insertions, 550 deletions
diff --git a/arch/arm/mach-ux500/Kconfig b/arch/arm/mach-ux500/Kconfig
index 58626013aa32..8071d2746f70 100644
--- a/arch/arm/mach-ux500/Kconfig
+++ b/arch/arm/mach-ux500/Kconfig
@@ -15,6 +15,7 @@ config UX500_SOC_DB5500
15 15
16config UX500_SOC_DB8500 16config UX500_SOC_DB8500
17 bool "DB8500" 17 bool "DB8500"
18 select MFD_DB8500_PRCMU
18 19
19endmenu 20endmenu
20 21
diff --git a/arch/arm/mach-ux500/Makefile b/arch/arm/mach-ux500/Makefile
index 2a08a10e09da..7a1d43e04f97 100644
--- a/arch/arm/mach-ux500/Makefile
+++ b/arch/arm/mach-ux500/Makefile
@@ -5,7 +5,7 @@
5obj-y := clock.o cpu.o devices.o devices-common.o \ 5obj-y := clock.o cpu.o devices.o devices-common.o \
6 id.o usb.o 6 id.o usb.o
7obj-$(CONFIG_UX500_SOC_DB5500) += cpu-db5500.o dma-db5500.o 7obj-$(CONFIG_UX500_SOC_DB5500) += cpu-db5500.o dma-db5500.o
8obj-$(CONFIG_UX500_SOC_DB8500) += cpu-db8500.o devices-db8500.o prcmu-db8500.o 8obj-$(CONFIG_UX500_SOC_DB8500) += cpu-db8500.o devices-db8500.o
9obj-$(CONFIG_MACH_U8500) += board-mop500.o board-mop500-sdi.o \ 9obj-$(CONFIG_MACH_U8500) += board-mop500.o board-mop500-sdi.o \
10 board-mop500-regulators.o \ 10 board-mop500-regulators.o \
11 board-mop500-uib.o board-mop500-stuib.o \ 11 board-mop500-uib.o board-mop500-stuib.o \
diff --git a/arch/arm/mach-ux500/cpu.c b/arch/arm/mach-ux500/cpu.c
index 0190e0e68b4d..11360f734cec 100644
--- a/arch/arm/mach-ux500/cpu.c
+++ b/arch/arm/mach-ux500/cpu.c
@@ -8,6 +8,7 @@
8#include <linux/platform_device.h> 8#include <linux/platform_device.h>
9#include <linux/io.h> 9#include <linux/io.h>
10#include <linux/clk.h> 10#include <linux/clk.h>
11#include <linux/mfd/db8500-prcmu.h>
11 12
12#include <asm/cacheflush.h> 13#include <asm/cacheflush.h>
13#include <asm/hardware/cache-l2x0.h> 14#include <asm/hardware/cache-l2x0.h>
@@ -19,7 +20,6 @@
19#include <mach/hardware.h> 20#include <mach/hardware.h>
20#include <mach/setup.h> 21#include <mach/setup.h>
21#include <mach/devices.h> 22#include <mach/devices.h>
22#include <mach/prcmu.h>
23 23
24#include "clock.h" 24#include "clock.h"
25 25
diff --git a/arch/arm/mach-ux500/cpufreq.c b/arch/arm/mach-ux500/cpufreq.c
index 5c5b747f134d..d196939fcdb9 100644
--- a/arch/arm/mach-ux500/cpufreq.c
+++ b/arch/arm/mach-ux500/cpufreq.c
@@ -17,10 +17,9 @@
17#include <linux/kernel.h> 17#include <linux/kernel.h>
18#include <linux/cpufreq.h> 18#include <linux/cpufreq.h>
19#include <linux/delay.h> 19#include <linux/delay.h>
20#include <linux/mfd/db8500-prcmu.h>
20 21
21#include <mach/hardware.h> 22#include <mach/hardware.h>
22#include <mach/prcmu.h>
23#include <mach/prcmu-defs.h>
24 23
25#define DRIVER_NAME "cpufreq-u8500" 24#define DRIVER_NAME "cpufreq-u8500"
26#define CPUFREQ_NAME "u8500" 25#define CPUFREQ_NAME "u8500"
diff --git a/arch/arm/mach-ux500/include/mach/prcmu-defs.h b/arch/arm/mach-ux500/include/mach/prcmu-defs.h
deleted file mode 100644
index 848ba64b561f..000000000000
--- a/arch/arm/mach-ux500/include/mach/prcmu-defs.h
+++ /dev/null
@@ -1,30 +0,0 @@
1/*
2 * Copyright (C) STMicroelectronics 2009
3 * Copyright (C) ST-Ericsson SA 2010
4 *
5 * Author: Sundar Iyer <sundar.iyer@stericsson.com>
6 * Author: Martin Persson <martin.persson@stericsson.com>
7 *
8 * License Terms: GNU General Public License v2
9 *
10 * PRCM Unit definitions
11 */
12
13#ifndef __MACH_PRCMU_DEFS_H
14#define __MACH_PRCMU_DEFS_H
15
16enum prcmu_cpu_opp {
17 CPU_OPP_INIT = 0x00,
18 CPU_OPP_NO_CHANGE = 0x01,
19 CPU_OPP_100 = 0x02,
20 CPU_OPP_50 = 0x03,
21 CPU_OPP_MAX = 0x04,
22 CPU_OPP_EXT_CLK = 0x07
23};
24enum prcmu_ape_opp {
25 APE_OPP_NO_CHANGE = 0x00,
26 APE_OPP_100 = 0x02,
27 APE_OPP_50 = 0x03,
28};
29
30#endif /* __MACH_PRCMU_DEFS_H */
diff --git a/arch/arm/mach-ux500/include/mach/prcmu-regs.h b/arch/arm/mach-ux500/include/mach/prcmu-regs.h
deleted file mode 100644
index c1226da19bfb..000000000000
--- a/arch/arm/mach-ux500/include/mach/prcmu-regs.h
+++ /dev/null
@@ -1,94 +0,0 @@
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_CHGCLKREQ (_PRCMU_BASE + 0x114)
20#define PRCM_PLLARM_ENABLE (_PRCMU_BASE + 0x98)
21#define PRCM_ARMCLKFIX_MGT (_PRCMU_BASE + 0x0)
22#define PRCM_A9_RESETN_CLR (_PRCMU_BASE + 0x1f4)
23#define PRCM_A9_RESETN_SET (_PRCMU_BASE + 0x1f0)
24#define PRCM_ARM_LS_CLAMP (_PRCMU_BASE + 0x30c)
25#define PRCM_SRAM_A9 (_PRCMU_BASE + 0x308)
26
27/* ARM WFI Standby signal register */
28#define PRCM_ARM_WFI_STANDBY (_PRCMU_BASE + 0x130)
29#define PRCMU_IOCR (_PRCMU_BASE + 0x310)
30
31/* CPU mailbox registers */
32#define PRCM_MBOX_CPU_VAL (_PRCMU_BASE + 0x0fc)
33#define PRCM_MBOX_CPU_SET (_PRCMU_BASE + 0x100)
34#define PRCM_MBOX_CPU_CLR (_PRCMU_BASE + 0x104)
35
36/* Dual A9 core interrupt management unit registers */
37#define PRCM_A9_MASK_REQ (_PRCMU_BASE + 0x328)
38#define PRCM_A9_MASK_ACK (_PRCMU_BASE + 0x32c)
39#define PRCM_ARMITMSK31TO0 (_PRCMU_BASE + 0x11c)
40#define PRCM_ARMITMSK63TO32 (_PRCMU_BASE + 0x120)
41#define PRCM_ARMITMSK95TO64 (_PRCMU_BASE + 0x124)
42#define PRCM_ARMITMSK127TO96 (_PRCMU_BASE + 0x128)
43#define PRCM_POWER_STATE_VAL (_PRCMU_BASE + 0x25C)
44#define PRCM_ARMITVAL31TO0 (_PRCMU_BASE + 0x260)
45#define PRCM_ARMITVAL63TO32 (_PRCMU_BASE + 0x264)
46#define PRCM_ARMITVAL95TO64 (_PRCMU_BASE + 0x268)
47#define PRCM_ARMITVAL127TO96 (_PRCMU_BASE + 0x26C)
48
49#define PRCM_HOSTACCESS_REQ (_PRCMU_BASE + 0x334)
50#define ARM_WAKEUP_MODEM 0x1
51
52#define PRCM_ARM_IT1_CLEAR (_PRCMU_BASE + 0x48C)
53#define PRCM_ARM_IT1_VAL (_PRCMU_BASE + 0x494)
54#define PRCM_HOLD_EVT (_PRCMU_BASE + 0x174)
55
56#define PRCM_ITSTATUS0 (_PRCMU_BASE + 0x148)
57#define PRCM_ITSTATUS1 (_PRCMU_BASE + 0x150)
58#define PRCM_ITSTATUS2 (_PRCMU_BASE + 0x158)
59#define PRCM_ITSTATUS3 (_PRCMU_BASE + 0x160)
60#define PRCM_ITSTATUS4 (_PRCMU_BASE + 0x168)
61#define PRCM_ITSTATUS5 (_PRCMU_BASE + 0x484)
62#define PRCM_ITCLEAR5 (_PRCMU_BASE + 0x488)
63#define PRCM_ARMIT_MASKXP70_IT (_PRCMU_BASE + 0x1018)
64
65/* System reset register */
66#define PRCM_APE_SOFTRST (_PRCMU_BASE + 0x228)
67
68/* Level shifter and clamp control registers */
69#define PRCM_MMIP_LS_CLAMP_SET (_PRCMU_BASE + 0x420)
70#define PRCM_MMIP_LS_CLAMP_CLR (_PRCMU_BASE + 0x424)
71
72/* PRCMU clock/PLL/reset registers */
73#define PRCM_PLLDSI_FREQ (_PRCMU_BASE + 0x500)
74#define PRCM_PLLDSI_ENABLE (_PRCMU_BASE + 0x504)
75#define PRCM_LCDCLK_MGT (_PRCMU_BASE + 0x044)
76#define PRCM_MCDECLK_MGT (_PRCMU_BASE + 0x064)
77#define PRCM_HDMICLK_MGT (_PRCMU_BASE + 0x058)
78#define PRCM_TVCLK_MGT (_PRCMU_BASE + 0x07c)
79#define PRCM_DSI_PLLOUT_SEL (_PRCMU_BASE + 0x530)
80#define PRCM_DSITVCLK_DIV (_PRCMU_BASE + 0x52C)
81#define PRCM_APE_RESETN_SET (_PRCMU_BASE + 0x1E4)
82#define PRCM_APE_RESETN_CLR (_PRCMU_BASE + 0x1E8)
83
84/* ePOD and memory power signal control registers */
85#define PRCM_EPOD_C_SET (_PRCMU_BASE + 0x410)
86#define PRCM_SRAM_LS_SLEEP (_PRCMU_BASE + 0x304)
87
88/* Debug power control unit registers */
89#define PRCM_POWER_STATE_SET (_PRCMU_BASE + 0x254)
90
91/* Miscellaneous unit registers */
92#define PRCM_DSI_SW_RESET (_PRCMU_BASE + 0x324)
93
94#endif /* __MACH_PRCMU_REGS_H */
diff --git a/arch/arm/mach-ux500/include/mach/prcmu.h b/arch/arm/mach-ux500/include/mach/prcmu.h
deleted file mode 100644
index c49e456162ef..000000000000
--- a/arch/arm/mach-ux500/include/mach/prcmu.h
+++ /dev/null
@@ -1,28 +0,0 @@
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 * Author: Mattias Nilsson <mattias.i.nilsson@stericsson.com>
8 *
9 * License Terms: GNU General Public License v2
10 *
11 * PRCM Unit f/w API
12 */
13#ifndef __MACH_PRCMU_H
14#define __MACH_PRCMU_H
15#include <mach/prcmu-defs.h>
16
17void __init prcmu_early_init(void);
18int prcmu_abb_read(u8 slave, u8 reg, u8 *value, u8 size);
19int prcmu_abb_write(u8 slave, u8 reg, u8 *value, u8 size);
20int prcmu_set_ape_opp(enum prcmu_ape_opp opp);
21int prcmu_set_cpu_opp(enum prcmu_cpu_opp opp);
22int prcmu_set_ape_cpu_opps(enum prcmu_ape_opp ape_opp,
23 enum prcmu_cpu_opp cpu_opp);
24int prcmu_get_ape_opp(void);
25int prcmu_get_cpu_opp(void);
26bool prcmu_has_arm_maxopp(void);
27
28#endif /* __MACH_PRCMU_H */
diff --git a/arch/arm/mach-ux500/prcmu-db8500.c b/arch/arm/mach-ux500/prcmu-db8500.c
deleted file mode 100644
index c522d26ef348..000000000000
--- a/arch/arm/mach-ux500/prcmu-db8500.c
+++ /dev/null
@@ -1,394 +0,0 @@
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/kernel.h>
14#include <linux/module.h>
15#include <linux/errno.h>
16#include <linux/err.h>
17#include <linux/io.h>
18#include <linux/mutex.h>
19#include <linux/completion.h>
20#include <linux/jiffies.h>
21#include <linux/bitops.h>
22#include <linux/interrupt.h>
23
24#include <mach/hardware.h>
25#include <mach/prcmu-regs.h>
26#include <mach/prcmu-defs.h>
27
28/* Global var to runtime determine TCDM base for v2 or v1 */
29static __iomem void *tcdm_base;
30
31#define _MBOX_HEADER (tcdm_base + 0xFE8)
32#define MBOX_HEADER_REQ_MB0 (_MBOX_HEADER + 0x0)
33
34#define REQ_MB1 (tcdm_base + 0xFD0)
35#define REQ_MB5 (tcdm_base + 0xE44)
36
37#define REQ_MB1_ARMOPP (REQ_MB1 + 0x0)
38#define REQ_MB1_APEOPP (REQ_MB1 + 0x1)
39#define REQ_MB1_BOOSTOPP (REQ_MB1 + 0x2)
40
41#define ACK_MB1 (tcdm_base + 0xE04)
42#define ACK_MB5 (tcdm_base + 0xDF4)
43
44#define ACK_MB1_CURR_ARMOPP (ACK_MB1 + 0x0)
45#define ACK_MB1_CURR_APEOPP (ACK_MB1 + 0x1)
46
47#define REQ_MB5_I2C_SLAVE_OP (REQ_MB5)
48#define REQ_MB5_I2C_HW_BITS (REQ_MB5 + 1)
49#define REQ_MB5_I2C_REG (REQ_MB5 + 2)
50#define REQ_MB5_I2C_VAL (REQ_MB5 + 3)
51
52#define ACK_MB5_I2C_STATUS (ACK_MB5 + 1)
53#define ACK_MB5_I2C_VAL (ACK_MB5 + 3)
54
55#define PRCM_AVS_VARM_MAX_OPP (tcdm_base + 0x2E4)
56#define PRCM_AVS_ISMODEENABLE 7
57#define PRCM_AVS_ISMODEENABLE_MASK (1 << PRCM_AVS_ISMODEENABLE)
58
59#define I2C_WRITE(slave) \
60 (((slave) << 1) | (cpu_is_u8500v2() ? BIT(6) : 0))
61#define I2C_READ(slave) \
62 (((slave) << 1) | (cpu_is_u8500v2() ? BIT(6) : 0) | BIT(0))
63#define I2C_STOP_EN BIT(3)
64
65enum mb1_h {
66 MB1H_ARM_OPP = 1,
67 MB1H_APE_OPP,
68 MB1H_ARM_APE_OPP,
69};
70
71static struct {
72 struct mutex lock;
73 struct completion work;
74 struct {
75 u8 arm_opp;
76 u8 ape_opp;
77 u8 arm_status;
78 u8 ape_status;
79 } ack;
80} mb1_transfer;
81
82enum ack_mb5_status {
83 I2C_WR_OK = 0x01,
84 I2C_RD_OK = 0x02,
85};
86
87#define MBOX_BIT BIT
88#define NUM_MBOX 8
89
90static struct {
91 struct mutex lock;
92 struct completion work;
93 bool failed;
94 struct {
95 u8 status;
96 u8 value;
97 } ack;
98} mb5_transfer;
99
100/**
101 * prcmu_abb_read() - Read register value(s) from the ABB.
102 * @slave: The I2C slave address.
103 * @reg: The (start) register address.
104 * @value: The read out value(s).
105 * @size: The number of registers to read.
106 *
107 * Reads register value(s) from the ABB.
108 * @size has to be 1 for the current firmware version.
109 */
110int prcmu_abb_read(u8 slave, u8 reg, u8 *value, u8 size)
111{
112 int r;
113
114 if (size != 1)
115 return -EINVAL;
116
117 r = mutex_lock_interruptible(&mb5_transfer.lock);
118 if (r)
119 return r;
120
121 while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(5))
122 cpu_relax();
123
124 writeb(I2C_READ(slave), REQ_MB5_I2C_SLAVE_OP);
125 writeb(I2C_STOP_EN, REQ_MB5_I2C_HW_BITS);
126 writeb(reg, REQ_MB5_I2C_REG);
127
128 writel(MBOX_BIT(5), PRCM_MBOX_CPU_SET);
129 if (!wait_for_completion_timeout(&mb5_transfer.work,
130 msecs_to_jiffies(500))) {
131 pr_err("prcmu: prcmu_abb_read timed out.\n");
132 r = -EIO;
133 goto unlock_and_return;
134 }
135 r = ((mb5_transfer.ack.status == I2C_RD_OK) ? 0 : -EIO);
136 if (!r)
137 *value = mb5_transfer.ack.value;
138
139unlock_and_return:
140 mutex_unlock(&mb5_transfer.lock);
141 return r;
142}
143EXPORT_SYMBOL(prcmu_abb_read);
144
145/**
146 * prcmu_abb_write() - Write register value(s) to the ABB.
147 * @slave: The I2C slave address.
148 * @reg: The (start) register address.
149 * @value: The value(s) to write.
150 * @size: The number of registers to write.
151 *
152 * Reads register value(s) from the ABB.
153 * @size has to be 1 for the current firmware version.
154 */
155int prcmu_abb_write(u8 slave, u8 reg, u8 *value, u8 size)
156{
157 int r;
158
159 if (size != 1)
160 return -EINVAL;
161
162 r = mutex_lock_interruptible(&mb5_transfer.lock);
163 if (r)
164 return r;
165
166
167 while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(5))
168 cpu_relax();
169
170 writeb(I2C_WRITE(slave), REQ_MB5_I2C_SLAVE_OP);
171 writeb(I2C_STOP_EN, REQ_MB5_I2C_HW_BITS);
172 writeb(reg, REQ_MB5_I2C_REG);
173 writeb(*value, REQ_MB5_I2C_VAL);
174
175 writel(MBOX_BIT(5), PRCM_MBOX_CPU_SET);
176 if (!wait_for_completion_timeout(&mb5_transfer.work,
177 msecs_to_jiffies(500))) {
178 pr_err("prcmu: prcmu_abb_write timed out.\n");
179 r = -EIO;
180 goto unlock_and_return;
181 }
182 r = ((mb5_transfer.ack.status == I2C_WR_OK) ? 0 : -EIO);
183
184unlock_and_return:
185 mutex_unlock(&mb5_transfer.lock);
186 return r;
187}
188EXPORT_SYMBOL(prcmu_abb_write);
189
190static int set_ape_cpu_opps(u8 header, enum prcmu_ape_opp ape_opp,
191 enum prcmu_cpu_opp cpu_opp)
192{
193 bool do_ape;
194 bool do_arm;
195 int err = 0;
196
197 do_ape = ((header == MB1H_APE_OPP) || (header == MB1H_ARM_APE_OPP));
198 do_arm = ((header == MB1H_ARM_OPP) || (header == MB1H_ARM_APE_OPP));
199
200 mutex_lock(&mb1_transfer.lock);
201
202 while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(1))
203 cpu_relax();
204
205 writeb(0, MBOX_HEADER_REQ_MB0);
206 writeb(cpu_opp, REQ_MB1_ARMOPP);
207 writeb(ape_opp, REQ_MB1_APEOPP);
208 writeb(0, REQ_MB1_BOOSTOPP);
209 writel(MBOX_BIT(1), PRCM_MBOX_CPU_SET);
210 wait_for_completion(&mb1_transfer.work);
211 if ((do_ape) && (mb1_transfer.ack.ape_status != 0))
212 err = -EIO;
213 if ((do_arm) && (mb1_transfer.ack.arm_status != 0))
214 err = -EIO;
215
216 mutex_unlock(&mb1_transfer.lock);
217
218 return err;
219}
220
221/**
222 * prcmu_set_ape_opp() - Set the OPP of the APE.
223 * @opp: The OPP to set.
224 *
225 * This function sets the OPP of the APE.
226 */
227int prcmu_set_ape_opp(enum prcmu_ape_opp opp)
228{
229 return set_ape_cpu_opps(MB1H_APE_OPP, opp, APE_OPP_NO_CHANGE);
230}
231EXPORT_SYMBOL(prcmu_set_ape_opp);
232
233/**
234 * prcmu_set_cpu_opp() - Set the OPP of the CPU.
235 * @opp: The OPP to set.
236 *
237 * This function sets the OPP of the CPU.
238 */
239int prcmu_set_cpu_opp(enum prcmu_cpu_opp opp)
240{
241 return set_ape_cpu_opps(MB1H_ARM_OPP, CPU_OPP_NO_CHANGE, opp);
242}
243EXPORT_SYMBOL(prcmu_set_cpu_opp);
244
245/**
246 * prcmu_set_ape_cpu_opps() - Set the OPPs of the APE and the CPU.
247 * @ape_opp: The APE OPP to set.
248 * @cpu_opp: The CPU OPP to set.
249 *
250 * This function sets the OPPs of the APE and the CPU.
251 */
252int prcmu_set_ape_cpu_opps(enum prcmu_ape_opp ape_opp,
253 enum prcmu_cpu_opp cpu_opp)
254{
255 return set_ape_cpu_opps(MB1H_ARM_APE_OPP, ape_opp, cpu_opp);
256}
257EXPORT_SYMBOL(prcmu_set_ape_cpu_opps);
258
259/**
260 * prcmu_get_ape_opp() - Get the OPP of the APE.
261 *
262 * This function gets the OPP of the APE.
263 */
264enum prcmu_ape_opp prcmu_get_ape_opp(void)
265{
266 return readb(ACK_MB1_CURR_APEOPP);
267}
268EXPORT_SYMBOL(prcmu_get_ape_opp);
269
270/**
271 * prcmu_get_cpu_opp() - Get the OPP of the CPU.
272 *
273 * This function gets the OPP of the CPU. The OPP is specified in %%.
274 * PRCMU_OPP_EXT is a special OPP value, not specified in %%.
275 */
276int prcmu_get_cpu_opp(void)
277{
278 return readb(ACK_MB1_CURR_ARMOPP);
279}
280EXPORT_SYMBOL(prcmu_get_cpu_opp);
281
282bool prcmu_has_arm_maxopp(void)
283{
284 return (readb(PRCM_AVS_VARM_MAX_OPP) & PRCM_AVS_ISMODEENABLE_MASK)
285 == PRCM_AVS_ISMODEENABLE_MASK;
286}
287
288static void read_mailbox_0(void)
289{
290 writel(MBOX_BIT(0), PRCM_ARM_IT1_CLEAR);
291}
292
293static void read_mailbox_1(void)
294{
295 mb1_transfer.ack.arm_opp = readb(ACK_MB1_CURR_ARMOPP);
296 mb1_transfer.ack.ape_opp = readb(ACK_MB1_CURR_APEOPP);
297 complete(&mb1_transfer.work);
298 writel(MBOX_BIT(1), PRCM_ARM_IT1_CLEAR);
299}
300
301static void read_mailbox_2(void)
302{
303 writel(MBOX_BIT(2), PRCM_ARM_IT1_CLEAR);
304}
305
306static void read_mailbox_3(void)
307{
308 writel(MBOX_BIT(3), PRCM_ARM_IT1_CLEAR);
309}
310
311static void read_mailbox_4(void)
312{
313 writel(MBOX_BIT(4), PRCM_ARM_IT1_CLEAR);
314}
315
316static void read_mailbox_5(void)
317{
318 mb5_transfer.ack.status = readb(ACK_MB5_I2C_STATUS);
319 mb5_transfer.ack.value = readb(ACK_MB5_I2C_VAL);
320 complete(&mb5_transfer.work);
321 writel(MBOX_BIT(5), PRCM_ARM_IT1_CLEAR);
322}
323
324static void read_mailbox_6(void)
325{
326 writel(MBOX_BIT(6), PRCM_ARM_IT1_CLEAR);
327}
328
329static void read_mailbox_7(void)
330{
331 writel(MBOX_BIT(7), PRCM_ARM_IT1_CLEAR);
332}
333
334static void (* const read_mailbox[NUM_MBOX])(void) = {
335 read_mailbox_0,
336 read_mailbox_1,
337 read_mailbox_2,
338 read_mailbox_3,
339 read_mailbox_4,
340 read_mailbox_5,
341 read_mailbox_6,
342 read_mailbox_7
343};
344
345static irqreturn_t prcmu_irq_handler(int irq, void *data)
346{
347 u32 bits;
348 u8 n;
349
350 bits = (readl(PRCM_ARM_IT1_VAL) & (MBOX_BIT(NUM_MBOX) - 1));
351 if (unlikely(!bits))
352 return IRQ_NONE;
353
354 for (n = 0; bits; n++) {
355 if (bits & MBOX_BIT(n)) {
356 bits -= MBOX_BIT(n);
357 read_mailbox[n]();
358 }
359 }
360 return IRQ_HANDLED;
361}
362
363void __init prcmu_early_init(void)
364{
365 if (cpu_is_u8500v11() || cpu_is_u8500ed()) {
366 tcdm_base = __io_address(U8500_PRCMU_TCDM_BASE_V1);
367 } else if (cpu_is_u8500v2()) {
368 tcdm_base = __io_address(U8500_PRCMU_TCDM_BASE);
369 } else {
370 pr_err("prcmu: Unsupported chip version\n");
371 BUG();
372 }
373}
374
375static int __init prcmu_init(void)
376{
377 if (cpu_is_u8500ed()) {
378 pr_err("prcmu: Unsupported chip version\n");
379 return 0;
380 }
381
382 mutex_init(&mb1_transfer.lock);
383 init_completion(&mb1_transfer.work);
384 mutex_init(&mb5_transfer.lock);
385 init_completion(&mb5_transfer.work);
386
387 /* Clean up the mailbox interrupts after pre-kernel code. */
388 writel((MBOX_BIT(NUM_MBOX) - 1), PRCM_ARM_IT1_CLEAR);
389
390 return request_irq(IRQ_DB8500_PRCMU1, prcmu_irq_handler, 0,
391 "prcmu", NULL);
392}
393
394arch_initcall(prcmu_init);
generated by cgit v1.2.2 (git 2.25.0) at 2024-09-21 10:20:10 -0400