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linux/drivers/mfd/qcom_rpm.c
Linus Walleij 9835f1b70b mfd: qcom_rpm: Fix offset error for msm8660 
The RPM in MSM8660/APQ8060 has different offsets to the selector
ACK and request context ACK registers. Make all these register
offsets part of the per-SoC data and assign the right values.

The bug was found by verifying backwards to the vendor tree in
the out-of-tree files <mach/rpm-[8660|8064|8960]>: all were using
offsets 3,11,15,23 and a select size of 4, except the MSM8660/APQ8060
which was using offsets 3,11,19,27 and a select size of 7.

All other platforms apart from msm8660 were affected by reading
excess registers, since 7 was hardcoded as the number of select
words, this patch makes also this part dynamic so we only write/read
as many select words as the platform actually use.

Symptoms of this bug when using msm8660: the first RPM transaction
would work, but the next would stall or raise an error since the
previous transaction was not properly ACKed as the ACK words were
read at the wrong offset.

Cc: stable@vger.kernel.org
Fixes: 58e214382b ("mfd: qcom-rpm: Driver for the Qualcomm RPM")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Björn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2016-06-29 10:14:39 +01:00

648 lines
22 KiB
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/*
* Copyright (c) 2014, Sony Mobile Communications AB.
* Copyright (c) 2013, The Linux Foundation. All rights reserved.
* Author: Bjorn Andersson <bjorn.andersson@sonymobile.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/of_platform.h>
#include <linux/io.h>
#include <linux/interrupt.h>
#include <linux/mfd/qcom_rpm.h>
#include <linux/mfd/syscon.h>
#include <linux/regmap.h>
#include <dt-bindings/mfd/qcom-rpm.h>
struct qcom_rpm_resource {
unsigned target_id;
unsigned status_id;
unsigned select_id;
unsigned size;
};
struct qcom_rpm_data {
u32 version;
const struct qcom_rpm_resource *resource_table;
unsigned int n_resources;
unsigned int req_ctx_off;
unsigned int req_sel_off;
unsigned int ack_ctx_off;
unsigned int ack_sel_off;
unsigned int sel_size;
};
struct qcom_rpm {
struct device *dev;
struct regmap *ipc_regmap;
unsigned ipc_offset;
unsigned ipc_bit;
struct completion ack;
struct mutex lock;
void __iomem *status_regs;
void __iomem *ctrl_regs;
void __iomem *req_regs;
u32 ack_status;
const struct qcom_rpm_data *data;
};
#define RPM_STATUS_REG(rpm, i) ((rpm)->status_regs + (i) * 4)
#define RPM_CTRL_REG(rpm, i) ((rpm)->ctrl_regs + (i) * 4)
#define RPM_REQ_REG(rpm, i) ((rpm)->req_regs + (i) * 4)
#define RPM_REQUEST_TIMEOUT (5 * HZ)
#define RPM_MAX_SEL_SIZE 7
#define RPM_NOTIFICATION BIT(30)
#define RPM_REJECTED BIT(31)
#define RPM_SIGNAL BIT(2)
static const struct qcom_rpm_resource apq8064_rpm_resource_table[] = {
[QCOM_RPM_CXO_CLK] = { 25, 9, 5, 1 },
[QCOM_RPM_PXO_CLK] = { 26, 10, 6, 1 },
[QCOM_RPM_APPS_FABRIC_CLK] = { 27, 11, 8, 1 },
[QCOM_RPM_SYS_FABRIC_CLK] = { 28, 12, 9, 1 },
[QCOM_RPM_MM_FABRIC_CLK] = { 29, 13, 10, 1 },
[QCOM_RPM_DAYTONA_FABRIC_CLK] = { 30, 14, 11, 1 },
[QCOM_RPM_SFPB_CLK] = { 31, 15, 12, 1 },
[QCOM_RPM_CFPB_CLK] = { 32, 16, 13, 1 },
[QCOM_RPM_MMFPB_CLK] = { 33, 17, 14, 1 },
[QCOM_RPM_EBI1_CLK] = { 34, 18, 16, 1 },
[QCOM_RPM_APPS_FABRIC_HALT] = { 35, 19, 18, 1 },
[QCOM_RPM_APPS_FABRIC_MODE] = { 37, 20, 19, 1 },
[QCOM_RPM_APPS_FABRIC_IOCTL] = { 40, 21, 20, 1 },
[QCOM_RPM_APPS_FABRIC_ARB] = { 41, 22, 21, 12 },
[QCOM_RPM_SYS_FABRIC_HALT] = { 53, 23, 22, 1 },
[QCOM_RPM_SYS_FABRIC_MODE] = { 55, 24, 23, 1 },
[QCOM_RPM_SYS_FABRIC_IOCTL] = { 58, 25, 24, 1 },
[QCOM_RPM_SYS_FABRIC_ARB] = { 59, 26, 25, 30 },
[QCOM_RPM_MM_FABRIC_HALT] = { 89, 27, 26, 1 },
[QCOM_RPM_MM_FABRIC_MODE] = { 91, 28, 27, 1 },
[QCOM_RPM_MM_FABRIC_IOCTL] = { 94, 29, 28, 1 },
[QCOM_RPM_MM_FABRIC_ARB] = { 95, 30, 29, 21 },
[QCOM_RPM_PM8921_SMPS1] = { 116, 31, 30, 2 },
[QCOM_RPM_PM8921_SMPS2] = { 118, 33, 31, 2 },
[QCOM_RPM_PM8921_SMPS3] = { 120, 35, 32, 2 },
[QCOM_RPM_PM8921_SMPS4] = { 122, 37, 33, 2 },
[QCOM_RPM_PM8921_SMPS5] = { 124, 39, 34, 2 },
[QCOM_RPM_PM8921_SMPS6] = { 126, 41, 35, 2 },
[QCOM_RPM_PM8921_SMPS7] = { 128, 43, 36, 2 },
[QCOM_RPM_PM8921_SMPS8] = { 130, 45, 37, 2 },
[QCOM_RPM_PM8921_LDO1] = { 132, 47, 38, 2 },
[QCOM_RPM_PM8921_LDO2] = { 134, 49, 39, 2 },
[QCOM_RPM_PM8921_LDO3] = { 136, 51, 40, 2 },
[QCOM_RPM_PM8921_LDO4] = { 138, 53, 41, 2 },
[QCOM_RPM_PM8921_LDO5] = { 140, 55, 42, 2 },
[QCOM_RPM_PM8921_LDO6] = { 142, 57, 43, 2 },
[QCOM_RPM_PM8921_LDO7] = { 144, 59, 44, 2 },
[QCOM_RPM_PM8921_LDO8] = { 146, 61, 45, 2 },
[QCOM_RPM_PM8921_LDO9] = { 148, 63, 46, 2 },
[QCOM_RPM_PM8921_LDO10] = { 150, 65, 47, 2 },
[QCOM_RPM_PM8921_LDO11] = { 152, 67, 48, 2 },
[QCOM_RPM_PM8921_LDO12] = { 154, 69, 49, 2 },
[QCOM_RPM_PM8921_LDO13] = { 156, 71, 50, 2 },
[QCOM_RPM_PM8921_LDO14] = { 158, 73, 51, 2 },
[QCOM_RPM_PM8921_LDO15] = { 160, 75, 52, 2 },
[QCOM_RPM_PM8921_LDO16] = { 162, 77, 53, 2 },
[QCOM_RPM_PM8921_LDO17] = { 164, 79, 54, 2 },
[QCOM_RPM_PM8921_LDO18] = { 166, 81, 55, 2 },
[QCOM_RPM_PM8921_LDO19] = { 168, 83, 56, 2 },
[QCOM_RPM_PM8921_LDO20] = { 170, 85, 57, 2 },
[QCOM_RPM_PM8921_LDO21] = { 172, 87, 58, 2 },
[QCOM_RPM_PM8921_LDO22] = { 174, 89, 59, 2 },
[QCOM_RPM_PM8921_LDO23] = { 176, 91, 60, 2 },
[QCOM_RPM_PM8921_LDO24] = { 178, 93, 61, 2 },
[QCOM_RPM_PM8921_LDO25] = { 180, 95, 62, 2 },
[QCOM_RPM_PM8921_LDO26] = { 182, 97, 63, 2 },
[QCOM_RPM_PM8921_LDO27] = { 184, 99, 64, 2 },
[QCOM_RPM_PM8921_LDO28] = { 186, 101, 65, 2 },
[QCOM_RPM_PM8921_LDO29] = { 188, 103, 66, 2 },
[QCOM_RPM_PM8921_CLK1] = { 190, 105, 67, 2 },
[QCOM_RPM_PM8921_CLK2] = { 192, 107, 68, 2 },
[QCOM_RPM_PM8921_LVS1] = { 194, 109, 69, 1 },
[QCOM_RPM_PM8921_LVS2] = { 195, 110, 70, 1 },
[QCOM_RPM_PM8921_LVS3] = { 196, 111, 71, 1 },
[QCOM_RPM_PM8921_LVS4] = { 197, 112, 72, 1 },
[QCOM_RPM_PM8921_LVS5] = { 198, 113, 73, 1 },
[QCOM_RPM_PM8921_LVS6] = { 199, 114, 74, 1 },
[QCOM_RPM_PM8921_LVS7] = { 200, 115, 75, 1 },
[QCOM_RPM_PM8821_SMPS1] = { 201, 116, 76, 2 },
[QCOM_RPM_PM8821_SMPS2] = { 203, 118, 77, 2 },
[QCOM_RPM_PM8821_LDO1] = { 205, 120, 78, 2 },
[QCOM_RPM_PM8921_NCP] = { 207, 122, 80, 2 },
[QCOM_RPM_CXO_BUFFERS] = { 209, 124, 81, 1 },
[QCOM_RPM_USB_OTG_SWITCH] = { 210, 125, 82, 1 },
[QCOM_RPM_HDMI_SWITCH] = { 211, 126, 83, 1 },
[QCOM_RPM_DDR_DMM] = { 212, 127, 84, 2 },
[QCOM_RPM_QDSS_CLK] = { 214, ~0, 7, 1 },
[QCOM_RPM_VDDMIN_GPIO] = { 215, 131, 89, 1 },
};
static const struct qcom_rpm_data apq8064_template = {
.version = 3,
.resource_table = apq8064_rpm_resource_table,
.n_resources = ARRAY_SIZE(apq8064_rpm_resource_table),
.req_ctx_off = 3,
.req_sel_off = 11,
.ack_ctx_off = 15,
.ack_sel_off = 23,
.sel_size = 4,
};
static const struct qcom_rpm_resource msm8660_rpm_resource_table[] = {
[QCOM_RPM_CXO_CLK] = { 32, 12, 5, 1 },
[QCOM_RPM_PXO_CLK] = { 33, 13, 6, 1 },
[QCOM_RPM_PLL_4] = { 34, 14, 7, 1 },
[QCOM_RPM_APPS_FABRIC_CLK] = { 35, 15, 8, 1 },
[QCOM_RPM_SYS_FABRIC_CLK] = { 36, 16, 9, 1 },
[QCOM_RPM_MM_FABRIC_CLK] = { 37, 17, 10, 1 },
[QCOM_RPM_DAYTONA_FABRIC_CLK] = { 38, 18, 11, 1 },
[QCOM_RPM_SFPB_CLK] = { 39, 19, 12, 1 },
[QCOM_RPM_CFPB_CLK] = { 40, 20, 13, 1 },
[QCOM_RPM_MMFPB_CLK] = { 41, 21, 14, 1 },
[QCOM_RPM_SMI_CLK] = { 42, 22, 15, 1 },
[QCOM_RPM_EBI1_CLK] = { 43, 23, 16, 1 },
[QCOM_RPM_APPS_L2_CACHE_CTL] = { 44, 24, 17, 1 },
[QCOM_RPM_APPS_FABRIC_HALT] = { 45, 25, 18, 2 },
[QCOM_RPM_APPS_FABRIC_MODE] = { 47, 26, 19, 3 },
[QCOM_RPM_APPS_FABRIC_ARB] = { 51, 28, 21, 6 },
[QCOM_RPM_SYS_FABRIC_HALT] = { 63, 29, 22, 2 },
[QCOM_RPM_SYS_FABRIC_MODE] = { 65, 30, 23, 3 },
[QCOM_RPM_SYS_FABRIC_ARB] = { 69, 32, 25, 22 },
[QCOM_RPM_MM_FABRIC_HALT] = { 105, 33, 26, 2 },
[QCOM_RPM_MM_FABRIC_MODE] = { 107, 34, 27, 3 },
[QCOM_RPM_MM_FABRIC_ARB] = { 111, 36, 29, 23 },
[QCOM_RPM_PM8901_SMPS0] = { 134, 37, 30, 2 },
[QCOM_RPM_PM8901_SMPS1] = { 136, 39, 31, 2 },
[QCOM_RPM_PM8901_SMPS2] = { 138, 41, 32, 2 },
[QCOM_RPM_PM8901_SMPS3] = { 140, 43, 33, 2 },
[QCOM_RPM_PM8901_SMPS4] = { 142, 45, 34, 2 },
[QCOM_RPM_PM8901_LDO0] = { 144, 47, 35, 2 },
[QCOM_RPM_PM8901_LDO1] = { 146, 49, 36, 2 },
[QCOM_RPM_PM8901_LDO2] = { 148, 51, 37, 2 },
[QCOM_RPM_PM8901_LDO3] = { 150, 53, 38, 2 },
[QCOM_RPM_PM8901_LDO4] = { 152, 55, 39, 2 },
[QCOM_RPM_PM8901_LDO5] = { 154, 57, 40, 2 },
[QCOM_RPM_PM8901_LDO6] = { 156, 59, 41, 2 },
[QCOM_RPM_PM8901_LVS0] = { 158, 61, 42, 1 },
[QCOM_RPM_PM8901_LVS1] = { 159, 62, 43, 1 },
[QCOM_RPM_PM8901_LVS2] = { 160, 63, 44, 1 },
[QCOM_RPM_PM8901_LVS3] = { 161, 64, 45, 1 },
[QCOM_RPM_PM8901_MVS] = { 162, 65, 46, 1 },
[QCOM_RPM_PM8058_SMPS0] = { 163, 66, 47, 2 },
[QCOM_RPM_PM8058_SMPS1] = { 165, 68, 48, 2 },
[QCOM_RPM_PM8058_SMPS2] = { 167, 70, 49, 2 },
[QCOM_RPM_PM8058_SMPS3] = { 169, 72, 50, 2 },
[QCOM_RPM_PM8058_SMPS4] = { 171, 74, 51, 2 },
[QCOM_RPM_PM8058_LDO0] = { 173, 76, 52, 2 },
[QCOM_RPM_PM8058_LDO1] = { 175, 78, 53, 2 },
[QCOM_RPM_PM8058_LDO2] = { 177, 80, 54, 2 },
[QCOM_RPM_PM8058_LDO3] = { 179, 82, 55, 2 },
[QCOM_RPM_PM8058_LDO4] = { 181, 84, 56, 2 },
[QCOM_RPM_PM8058_LDO5] = { 183, 86, 57, 2 },
[QCOM_RPM_PM8058_LDO6] = { 185, 88, 58, 2 },
[QCOM_RPM_PM8058_LDO7] = { 187, 90, 59, 2 },
[QCOM_RPM_PM8058_LDO8] = { 189, 92, 60, 2 },
[QCOM_RPM_PM8058_LDO9] = { 191, 94, 61, 2 },
[QCOM_RPM_PM8058_LDO10] = { 193, 96, 62, 2 },
[QCOM_RPM_PM8058_LDO11] = { 195, 98, 63, 2 },
[QCOM_RPM_PM8058_LDO12] = { 197, 100, 64, 2 },
[QCOM_RPM_PM8058_LDO13] = { 199, 102, 65, 2 },
[QCOM_RPM_PM8058_LDO14] = { 201, 104, 66, 2 },
[QCOM_RPM_PM8058_LDO15] = { 203, 106, 67, 2 },
[QCOM_RPM_PM8058_LDO16] = { 205, 108, 68, 2 },
[QCOM_RPM_PM8058_LDO17] = { 207, 110, 69, 2 },
[QCOM_RPM_PM8058_LDO18] = { 209, 112, 70, 2 },
[QCOM_RPM_PM8058_LDO19] = { 211, 114, 71, 2 },
[QCOM_RPM_PM8058_LDO20] = { 213, 116, 72, 2 },
[QCOM_RPM_PM8058_LDO21] = { 215, 118, 73, 2 },
[QCOM_RPM_PM8058_LDO22] = { 217, 120, 74, 2 },
[QCOM_RPM_PM8058_LDO23] = { 219, 122, 75, 2 },
[QCOM_RPM_PM8058_LDO24] = { 221, 124, 76, 2 },
[QCOM_RPM_PM8058_LDO25] = { 223, 126, 77, 2 },
[QCOM_RPM_PM8058_LVS0] = { 225, 128, 78, 1 },
[QCOM_RPM_PM8058_LVS1] = { 226, 129, 79, 1 },
[QCOM_RPM_PM8058_NCP] = { 227, 130, 80, 2 },
[QCOM_RPM_CXO_BUFFERS] = { 229, 132, 81, 1 },
};
static const struct qcom_rpm_data msm8660_template = {
.version = 2,
.resource_table = msm8660_rpm_resource_table,
.n_resources = ARRAY_SIZE(msm8660_rpm_resource_table),
.req_ctx_off = 3,
.req_sel_off = 11,
.ack_ctx_off = 19,
.ack_sel_off = 27,
.sel_size = 7,
};
static const struct qcom_rpm_resource msm8960_rpm_resource_table[] = {
[QCOM_RPM_CXO_CLK] = { 25, 9, 5, 1 },
[QCOM_RPM_PXO_CLK] = { 26, 10, 6, 1 },
[QCOM_RPM_APPS_FABRIC_CLK] = { 27, 11, 8, 1 },
[QCOM_RPM_SYS_FABRIC_CLK] = { 28, 12, 9, 1 },
[QCOM_RPM_MM_FABRIC_CLK] = { 29, 13, 10, 1 },
[QCOM_RPM_DAYTONA_FABRIC_CLK] = { 30, 14, 11, 1 },
[QCOM_RPM_SFPB_CLK] = { 31, 15, 12, 1 },
[QCOM_RPM_CFPB_CLK] = { 32, 16, 13, 1 },
[QCOM_RPM_MMFPB_CLK] = { 33, 17, 14, 1 },
[QCOM_RPM_EBI1_CLK] = { 34, 18, 16, 1 },
[QCOM_RPM_APPS_FABRIC_HALT] = { 35, 19, 18, 1 },
[QCOM_RPM_APPS_FABRIC_MODE] = { 37, 20, 19, 1 },
[QCOM_RPM_APPS_FABRIC_IOCTL] = { 40, 21, 20, 1 },
[QCOM_RPM_APPS_FABRIC_ARB] = { 41, 22, 21, 12 },
[QCOM_RPM_SYS_FABRIC_HALT] = { 53, 23, 22, 1 },
[QCOM_RPM_SYS_FABRIC_MODE] = { 55, 24, 23, 1 },
[QCOM_RPM_SYS_FABRIC_IOCTL] = { 58, 25, 24, 1 },
[QCOM_RPM_SYS_FABRIC_ARB] = { 59, 26, 25, 29 },
[QCOM_RPM_MM_FABRIC_HALT] = { 88, 27, 26, 1 },
[QCOM_RPM_MM_FABRIC_MODE] = { 90, 28, 27, 1 },
[QCOM_RPM_MM_FABRIC_IOCTL] = { 93, 29, 28, 1 },
[QCOM_RPM_MM_FABRIC_ARB] = { 94, 30, 29, 23 },
[QCOM_RPM_PM8921_SMPS1] = { 117, 31, 30, 2 },
[QCOM_RPM_PM8921_SMPS2] = { 119, 33, 31, 2 },
[QCOM_RPM_PM8921_SMPS3] = { 121, 35, 32, 2 },
[QCOM_RPM_PM8921_SMPS4] = { 123, 37, 33, 2 },
[QCOM_RPM_PM8921_SMPS5] = { 125, 39, 34, 2 },
[QCOM_RPM_PM8921_SMPS6] = { 127, 41, 35, 2 },
[QCOM_RPM_PM8921_SMPS7] = { 129, 43, 36, 2 },
[QCOM_RPM_PM8921_SMPS8] = { 131, 45, 37, 2 },
[QCOM_RPM_PM8921_LDO1] = { 133, 47, 38, 2 },
[QCOM_RPM_PM8921_LDO2] = { 135, 49, 39, 2 },
[QCOM_RPM_PM8921_LDO3] = { 137, 51, 40, 2 },
[QCOM_RPM_PM8921_LDO4] = { 139, 53, 41, 2 },
[QCOM_RPM_PM8921_LDO5] = { 141, 55, 42, 2 },
[QCOM_RPM_PM8921_LDO6] = { 143, 57, 43, 2 },
[QCOM_RPM_PM8921_LDO7] = { 145, 59, 44, 2 },
[QCOM_RPM_PM8921_LDO8] = { 147, 61, 45, 2 },
[QCOM_RPM_PM8921_LDO9] = { 149, 63, 46, 2 },
[QCOM_RPM_PM8921_LDO10] = { 151, 65, 47, 2 },
[QCOM_RPM_PM8921_LDO11] = { 153, 67, 48, 2 },
[QCOM_RPM_PM8921_LDO12] = { 155, 69, 49, 2 },
[QCOM_RPM_PM8921_LDO13] = { 157, 71, 50, 2 },
[QCOM_RPM_PM8921_LDO14] = { 159, 73, 51, 2 },
[QCOM_RPM_PM8921_LDO15] = { 161, 75, 52, 2 },
[QCOM_RPM_PM8921_LDO16] = { 163, 77, 53, 2 },
[QCOM_RPM_PM8921_LDO17] = { 165, 79, 54, 2 },
[QCOM_RPM_PM8921_LDO18] = { 167, 81, 55, 2 },
[QCOM_RPM_PM8921_LDO19] = { 169, 83, 56, 2 },
[QCOM_RPM_PM8921_LDO20] = { 171, 85, 57, 2 },
[QCOM_RPM_PM8921_LDO21] = { 173, 87, 58, 2 },
[QCOM_RPM_PM8921_LDO22] = { 175, 89, 59, 2 },
[QCOM_RPM_PM8921_LDO23] = { 177, 91, 60, 2 },
[QCOM_RPM_PM8921_LDO24] = { 179, 93, 61, 2 },
[QCOM_RPM_PM8921_LDO25] = { 181, 95, 62, 2 },
[QCOM_RPM_PM8921_LDO26] = { 183, 97, 63, 2 },
[QCOM_RPM_PM8921_LDO27] = { 185, 99, 64, 2 },
[QCOM_RPM_PM8921_LDO28] = { 187, 101, 65, 2 },
[QCOM_RPM_PM8921_LDO29] = { 189, 103, 66, 2 },
[QCOM_RPM_PM8921_CLK1] = { 191, 105, 67, 2 },
[QCOM_RPM_PM8921_CLK2] = { 193, 107, 68, 2 },
[QCOM_RPM_PM8921_LVS1] = { 195, 109, 69, 1 },
[QCOM_RPM_PM8921_LVS2] = { 196, 110, 70, 1 },
[QCOM_RPM_PM8921_LVS3] = { 197, 111, 71, 1 },
[QCOM_RPM_PM8921_LVS4] = { 198, 112, 72, 1 },
[QCOM_RPM_PM8921_LVS5] = { 199, 113, 73, 1 },
[QCOM_RPM_PM8921_LVS6] = { 200, 114, 74, 1 },
[QCOM_RPM_PM8921_LVS7] = { 201, 115, 75, 1 },
[QCOM_RPM_PM8921_NCP] = { 202, 116, 80, 2 },
[QCOM_RPM_CXO_BUFFERS] = { 204, 118, 81, 1 },
[QCOM_RPM_USB_OTG_SWITCH] = { 205, 119, 82, 1 },
[QCOM_RPM_HDMI_SWITCH] = { 206, 120, 83, 1 },
[QCOM_RPM_DDR_DMM] = { 207, 121, 84, 2 },
};
static const struct qcom_rpm_data msm8960_template = {
.version = 3,
.resource_table = msm8960_rpm_resource_table,
.n_resources = ARRAY_SIZE(msm8960_rpm_resource_table),
.req_ctx_off = 3,
.req_sel_off = 11,
.ack_ctx_off = 15,
.ack_sel_off = 23,
.sel_size = 4,
};
static const struct qcom_rpm_resource ipq806x_rpm_resource_table[] = {
[QCOM_RPM_CXO_CLK] = { 25, 9, 5, 1 },
[QCOM_RPM_PXO_CLK] = { 26, 10, 6, 1 },
[QCOM_RPM_APPS_FABRIC_CLK] = { 27, 11, 8, 1 },
[QCOM_RPM_SYS_FABRIC_CLK] = { 28, 12, 9, 1 },
[QCOM_RPM_NSS_FABRIC_0_CLK] = { 29, 13, 10, 1 },
[QCOM_RPM_DAYTONA_FABRIC_CLK] = { 30, 14, 11, 1 },
[QCOM_RPM_SFPB_CLK] = { 31, 15, 12, 1 },
[QCOM_RPM_CFPB_CLK] = { 32, 16, 13, 1 },
[QCOM_RPM_NSS_FABRIC_1_CLK] = { 33, 17, 14, 1 },
[QCOM_RPM_EBI1_CLK] = { 34, 18, 16, 1 },
[QCOM_RPM_APPS_FABRIC_HALT] = { 35, 19, 18, 2 },
[QCOM_RPM_APPS_FABRIC_MODE] = { 37, 20, 19, 3 },
[QCOM_RPM_APPS_FABRIC_IOCTL] = { 40, 21, 20, 1 },
[QCOM_RPM_APPS_FABRIC_ARB] = { 41, 22, 21, 12 },
[QCOM_RPM_SYS_FABRIC_HALT] = { 53, 23, 22, 2 },
[QCOM_RPM_SYS_FABRIC_MODE] = { 55, 24, 23, 3 },
[QCOM_RPM_SYS_FABRIC_IOCTL] = { 58, 25, 24, 1 },
[QCOM_RPM_SYS_FABRIC_ARB] = { 59, 26, 25, 30 },
[QCOM_RPM_MM_FABRIC_HALT] = { 89, 27, 26, 2 },
[QCOM_RPM_MM_FABRIC_MODE] = { 91, 28, 27, 3 },
[QCOM_RPM_MM_FABRIC_IOCTL] = { 94, 29, 28, 1 },
[QCOM_RPM_MM_FABRIC_ARB] = { 95, 30, 29, 2 },
[QCOM_RPM_CXO_BUFFERS] = { 209, 33, 31, 1 },
[QCOM_RPM_USB_OTG_SWITCH] = { 210, 34, 32, 1 },
[QCOM_RPM_HDMI_SWITCH] = { 211, 35, 33, 1 },
[QCOM_RPM_DDR_DMM] = { 212, 36, 34, 2 },
[QCOM_RPM_VDDMIN_GPIO] = { 215, 40, 39, 1 },
[QCOM_RPM_SMB208_S1a] = { 216, 41, 90, 2 },
[QCOM_RPM_SMB208_S1b] = { 218, 43, 91, 2 },
[QCOM_RPM_SMB208_S2a] = { 220, 45, 92, 2 },
[QCOM_RPM_SMB208_S2b] = { 222, 47, 93, 2 },
};
static const struct qcom_rpm_data ipq806x_template = {
.version = 3,
.resource_table = ipq806x_rpm_resource_table,
.n_resources = ARRAY_SIZE(ipq806x_rpm_resource_table),
.req_ctx_off = 3,
.req_sel_off = 11,
.ack_ctx_off = 15,
.ack_sel_off = 23,
.sel_size = 4,
};
static const struct of_device_id qcom_rpm_of_match[] = {
{ .compatible = "qcom,rpm-apq8064", .data = &apq8064_template },
{ .compatible = "qcom,rpm-msm8660", .data = &msm8660_template },
{ .compatible = "qcom,rpm-msm8960", .data = &msm8960_template },
{ .compatible = "qcom,rpm-ipq8064", .data = &ipq806x_template },
{ }
};
MODULE_DEVICE_TABLE(of, qcom_rpm_of_match);
int qcom_rpm_write(struct qcom_rpm *rpm,
int state,
int resource,
u32 *buf, size_t count)
{
const struct qcom_rpm_resource *res;
const struct qcom_rpm_data *data = rpm->data;
u32 sel_mask[RPM_MAX_SEL_SIZE] = { 0 };
int left;
int ret = 0;
int i;
if (WARN_ON(resource < 0 || resource >= data->n_resources))
return -EINVAL;
res = &data->resource_table[resource];
if (WARN_ON(res->size != count))
return -EINVAL;
mutex_lock(&rpm->lock);
for (i = 0; i < res->size; i++)
writel_relaxed(buf[i], RPM_REQ_REG(rpm, res->target_id + i));
bitmap_set((unsigned long *)sel_mask, res->select_id, 1);
for (i = 0; i < rpm->data->sel_size; i++) {
writel_relaxed(sel_mask[i],
RPM_CTRL_REG(rpm, rpm->data->req_sel_off + i));
}
writel_relaxed(BIT(state), RPM_CTRL_REG(rpm, rpm->data->req_ctx_off));
reinit_completion(&rpm->ack);
regmap_write(rpm->ipc_regmap, rpm->ipc_offset, BIT(rpm->ipc_bit));
left = wait_for_completion_timeout(&rpm->ack, RPM_REQUEST_TIMEOUT);
if (!left)
ret = -ETIMEDOUT;
else if (rpm->ack_status & RPM_REJECTED)
ret = -EIO;
mutex_unlock(&rpm->lock);
return ret;
}
EXPORT_SYMBOL(qcom_rpm_write);
static irqreturn_t qcom_rpm_ack_interrupt(int irq, void *dev)
{
struct qcom_rpm *rpm = dev;
u32 ack;
int i;
ack = readl_relaxed(RPM_CTRL_REG(rpm, rpm->data->ack_ctx_off));
for (i = 0; i < rpm->data->sel_size; i++)
writel_relaxed(0,
RPM_CTRL_REG(rpm, rpm->data->ack_sel_off + i));
writel(0, RPM_CTRL_REG(rpm, rpm->data->ack_ctx_off));
if (ack & RPM_NOTIFICATION) {
dev_warn(rpm->dev, "ignoring notification!\n");
} else {
rpm->ack_status = ack;
complete(&rpm->ack);
}
return IRQ_HANDLED;
}
static irqreturn_t qcom_rpm_err_interrupt(int irq, void *dev)
{
struct qcom_rpm *rpm = dev;
regmap_write(rpm->ipc_regmap, rpm->ipc_offset, BIT(rpm->ipc_bit));
dev_err(rpm->dev, "RPM triggered fatal error\n");
return IRQ_HANDLED;
}
static irqreturn_t qcom_rpm_wakeup_interrupt(int irq, void *dev)
{
return IRQ_HANDLED;
}
static int qcom_rpm_probe(struct platform_device *pdev)
{
const struct of_device_id *match;
struct device_node *syscon_np;
struct resource *res;
struct qcom_rpm *rpm;
u32 fw_version[3];
int irq_wakeup;
int irq_ack;
int irq_err;
int ret;
rpm = devm_kzalloc(&pdev->dev, sizeof(*rpm), GFP_KERNEL);
if (!rpm)
return -ENOMEM;
rpm->dev = &pdev->dev;
mutex_init(&rpm->lock);
init_completion(&rpm->ack);
irq_ack = platform_get_irq_byname(pdev, "ack");
if (irq_ack < 0) {
dev_err(&pdev->dev, "required ack interrupt missing\n");
return irq_ack;
}
irq_err = platform_get_irq_byname(pdev, "err");
if (irq_err < 0) {
dev_err(&pdev->dev, "required err interrupt missing\n");
return irq_err;
}
irq_wakeup = platform_get_irq_byname(pdev, "wakeup");
if (irq_wakeup < 0) {
dev_err(&pdev->dev, "required wakeup interrupt missing\n");
return irq_wakeup;
}
match = of_match_device(qcom_rpm_of_match, &pdev->dev);
if (!match)
return -ENODEV;
rpm->data = match->data;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
rpm->status_regs = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(rpm->status_regs))
return PTR_ERR(rpm->status_regs);
rpm->ctrl_regs = rpm->status_regs + 0x400;
rpm->req_regs = rpm->status_regs + 0x600;
syscon_np = of_parse_phandle(pdev->dev.of_node, "qcom,ipc", 0);
if (!syscon_np) {
dev_err(&pdev->dev, "no qcom,ipc node\n");
return -ENODEV;
}
rpm->ipc_regmap = syscon_node_to_regmap(syscon_np);
if (IS_ERR(rpm->ipc_regmap))
return PTR_ERR(rpm->ipc_regmap);
ret = of_property_read_u32_index(pdev->dev.of_node, "qcom,ipc", 1,
&rpm->ipc_offset);
if (ret < 0) {
dev_err(&pdev->dev, "no offset in qcom,ipc\n");
return -EINVAL;
}
ret = of_property_read_u32_index(pdev->dev.of_node, "qcom,ipc", 2,
&rpm->ipc_bit);
if (ret < 0) {
dev_err(&pdev->dev, "no bit in qcom,ipc\n");
return -EINVAL;
}
dev_set_drvdata(&pdev->dev, rpm);
fw_version[0] = readl(RPM_STATUS_REG(rpm, 0));
fw_version[1] = readl(RPM_STATUS_REG(rpm, 1));
fw_version[2] = readl(RPM_STATUS_REG(rpm, 2));
if (fw_version[0] != rpm->data->version) {
dev_err(&pdev->dev,
"RPM version %u.%u.%u incompatible with driver version %u",
fw_version[0],
fw_version[1],
fw_version[2],
rpm->data->version);
return -EFAULT;
}
dev_info(&pdev->dev, "RPM firmware %u.%u.%u\n", fw_version[0],
fw_version[1],
fw_version[2]);
ret = devm_request_irq(&pdev->dev,
irq_ack,
qcom_rpm_ack_interrupt,
IRQF_TRIGGER_RISING,
"qcom_rpm_ack",
rpm);
if (ret) {
dev_err(&pdev->dev, "failed to request ack interrupt\n");
return ret;
}
ret = irq_set_irq_wake(irq_ack, 1);
if (ret)
dev_warn(&pdev->dev, "failed to mark ack irq as wakeup\n");
ret = devm_request_irq(&pdev->dev,
irq_err,
qcom_rpm_err_interrupt,
IRQF_TRIGGER_RISING,
"qcom_rpm_err",
rpm);
if (ret) {
dev_err(&pdev->dev, "failed to request err interrupt\n");
return ret;
}
ret = devm_request_irq(&pdev->dev,
irq_wakeup,
qcom_rpm_wakeup_interrupt,
IRQF_TRIGGER_RISING,
"qcom_rpm_wakeup",
rpm);
if (ret) {
dev_err(&pdev->dev, "failed to request wakeup interrupt\n");
return ret;
}
ret = irq_set_irq_wake(irq_wakeup, 1);
if (ret)
dev_warn(&pdev->dev, "failed to mark wakeup irq as wakeup\n");
return of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
}
static int qcom_rpm_remove(struct platform_device *pdev)
{
of_platform_depopulate(&pdev->dev);
return 0;
}
static struct platform_driver qcom_rpm_driver = {
.probe = qcom_rpm_probe,
.remove = qcom_rpm_remove,
.driver = {
.name = "qcom_rpm",
.of_match_table = qcom_rpm_of_match,
},
};
static int __init qcom_rpm_init(void)
{
return platform_driver_register(&qcom_rpm_driver);
}
arch_initcall(qcom_rpm_init);
static void __exit qcom_rpm_exit(void)
{
platform_driver_unregister(&qcom_rpm_driver);
}
module_exit(qcom_rpm_exit)
MODULE_DESCRIPTION("Qualcomm Resource Power Manager driver");
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Bjorn Andersson <bjorn.andersson@sonymobile.com>");
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