[ARM] msm: add proc_comm support, necessary for clock and power control (b8a16e1f) · Commits · 戴 / test

arch/arm/mach-msm/Makefile

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		obj-y += io.o idle.o irq.o timer.o dma.o
		obj-y += proc_comm.o

		# Common code for board init
		obj-y += common.o

arch/arm/mach-msm/proc_comm.c

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		/* arch/arm/mach-msm/proc_comm.c
		*
		* Copyright (C) 2007-2008 Google, Inc.
		* Author: Brian Swetland <swetland@google.com>
		*
		* This software is licensed under the terms of the GNU General Public
		* License version 2, as published by the Free Software Foundation, and
		* may be copied, distributed, and modified under those terms.
		*
		* 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/delay.h>
		#include <linux/errno.h>
		#include <linux/io.h>
		#include <linux/spinlock.h>
		#include <mach/msm_iomap.h>
		#include <mach/system.h>

		#include "proc_comm.h"

		#define MSM_A2M_INT(n) (MSM_CSR_BASE + 0x400 + (n) * 4)

		static inline void notify_other_proc_comm(void)
		{
		writel(1, MSM_A2M_INT(6));
		}

		#define APP_COMMAND 0x00
		#define APP_STATUS 0x04
		#define APP_DATA1 0x08
		#define APP_DATA2 0x0C

		#define MDM_COMMAND 0x10
		#define MDM_STATUS 0x14
		#define MDM_DATA1 0x18
		#define MDM_DATA2 0x1C

		static DEFINE_SPINLOCK(proc_comm_lock);

		/* The higher level SMD support will install this to
		* provide a way to check for and handle modem restart.
		*/
		int (*msm_check_for_modem_crash)(void);

		/* Poll for a state change, checking for possible
		* modem crashes along the way (so we don't wait
		* forever while the ARM9 is blowing up).
		*
		* Return an error in the event of a modem crash and
		* restart so the msm_proc_comm() routine can restart
		* the operation from the beginning.
		*/
		static int proc_comm_wait_for(void __iomem *addr, unsigned value)
		{
		for (;;) {
		if (readl(addr) == value)
		return 0;

		if (msm_check_for_modem_crash)
		if (msm_check_for_modem_crash())
		return -EAGAIN;
		}
		}

		int msm_proc_comm(unsigned cmd, unsigned data1, unsigned data2)
		{
		void __iomem *base = MSM_SHARED_RAM_BASE;
		unsigned long flags;
		int ret;

		spin_lock_irqsave(&proc_comm_lock, flags);

		for (;;) {
		if (proc_comm_wait_for(base + MDM_STATUS, PCOM_READY))
		continue;

		writel(cmd, base + APP_COMMAND);
		writel(data1 ? *data1 : 0, base + APP_DATA1);
		writel(data2 ? *data2 : 0, base + APP_DATA2);

		notify_other_proc_comm();

		if (proc_comm_wait_for(base + APP_COMMAND, PCOM_CMD_DONE))
		continue;

		if (readl(base + APP_STATUS) != PCOM_CMD_FAIL) {
		if (data1)
		*data1 = readl(base + APP_DATA1);
		if (data2)
		*data2 = readl(base + APP_DATA2);
		ret = 0;
		} else {
		ret = -EIO;
		}
		break;
		}

		writel(PCOM_CMD_IDLE, base + APP_COMMAND);

		spin_unlock_irqrestore(&proc_comm_lock, flags);

		return ret;
		}

arch/arm/mach-msm/proc_comm.h

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		/* arch/arm/mach-msm/proc_comm.h
		*
		* Copyright (c) 2007 QUALCOMM Incorporated
		*
		* This software is licensed under the terms of the GNU General Public
		* License version 2, as published by the Free Software Foundation, and
		* may be copied, distributed, and modified under those terms.
		*
		* 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.
		*
		*/

		#ifndef _ARCH_ARM_MACH_MSM_PROC_COMM_H_
		#define _ARCH_ARM_MACH_MSM_PROC_COMM_H_

		enum {
		PCOM_CMD_IDLE = 0x0,
		PCOM_CMD_DONE,
		PCOM_RESET_APPS,
		PCOM_RESET_CHIP,
		PCOM_CONFIG_NAND_MPU,
		PCOM_CONFIG_USB_CLKS,
		PCOM_GET_POWER_ON_STATUS,
		PCOM_GET_WAKE_UP_STATUS,
		PCOM_GET_BATT_LEVEL,
		PCOM_CHG_IS_CHARGING,
		PCOM_POWER_DOWN,
		PCOM_USB_PIN_CONFIG,
		PCOM_USB_PIN_SEL,
		PCOM_SET_RTC_ALARM,
		PCOM_NV_READ,
		PCOM_NV_WRITE,
		PCOM_GET_UUID_HIGH,
		PCOM_GET_UUID_LOW,
		PCOM_GET_HW_ENTROPY,
		PCOM_RPC_GPIO_TLMM_CONFIG_REMOTE,
		PCOM_CLKCTL_RPC_ENABLE,
		PCOM_CLKCTL_RPC_DISABLE,
		PCOM_CLKCTL_RPC_RESET,
		PCOM_CLKCTL_RPC_SET_FLAGS,
		PCOM_CLKCTL_RPC_SET_RATE,
		PCOM_CLKCTL_RPC_MIN_RATE,
		PCOM_CLKCTL_RPC_MAX_RATE,
		PCOM_CLKCTL_RPC_RATE,
		PCOM_CLKCTL_RPC_PLL_REQUEST,
		PCOM_CLKCTL_RPC_ENABLED,
		PCOM_VREG_SWITCH,
		PCOM_VREG_SET_LEVEL,
		PCOM_GPIO_TLMM_CONFIG_GROUP,
		PCOM_GPIO_TLMM_UNCONFIG_GROUP,
		PCOM_NV_WRITE_BYTES_4_7,
		PCOM_CONFIG_DISP,
		PCOM_GET_FTM_BOOT_COUNT,
		PCOM_RPC_GPIO_TLMM_CONFIG_EX,
		PCOM_PM_MPP_CONFIG,
		PCOM_GPIO_IN,
		PCOM_GPIO_OUT,
		PCOM_RESET_MODEM,
		PCOM_RESET_CHIP_IMM,
		PCOM_PM_VID_EN,
		PCOM_VREG_PULLDOWN,
		PCOM_NUM_CMDS,
		};

		enum {
		PCOM_INVALID_STATUS = 0x0,
		PCOM_READY,
		PCOM_CMD_RUNNING,
		PCOM_CMD_SUCCESS,
		PCOM_CMD_FAIL,
		};

		/* List of VREGs that support the Pull Down Resistor setting. */
		enum {
		PM_VREG_PDOWN_MSMA_ID,
		PM_VREG_PDOWN_MSMP_ID,
		PM_VREG_PDOWN_MSME1_ID, /* Not supported in Panoramix */
		PM_VREG_PDOWN_MSMC1_ID, /* Not supported in PM6620 */
		PM_VREG_PDOWN_MSMC2_ID, /* Supported in PM7500 only */
		PM_VREG_PDOWN_GP3_ID, /* Supported in PM7500 only */
		PM_VREG_PDOWN_MSME2_ID, /* Supported in PM7500 and Panoramix only */
		PM_VREG_PDOWN_GP4_ID, /* Supported in PM7500 only */
		PM_VREG_PDOWN_GP1_ID, /* Supported in PM7500 only */
		PM_VREG_PDOWN_TCXO_ID,
		PM_VREG_PDOWN_PA_ID,
		PM_VREG_PDOWN_RFTX_ID,
		PM_VREG_PDOWN_RFRX1_ID,
		PM_VREG_PDOWN_RFRX2_ID,
		PM_VREG_PDOWN_SYNT_ID,
		PM_VREG_PDOWN_WLAN_ID,
		PM_VREG_PDOWN_USB_ID,
		PM_VREG_PDOWN_MMC_ID,
		PM_VREG_PDOWN_RUIM_ID,
		PM_VREG_PDOWN_MSMC0_ID, /* Supported in PM6610 only */
		PM_VREG_PDOWN_GP2_ID, /* Supported in PM7500 only */
		PM_VREG_PDOWN_GP5_ID, /* Supported in PM7500 only */
		PM_VREG_PDOWN_GP6_ID, /* Supported in PM7500 only */
		PM_VREG_PDOWN_RF_ID,
		PM_VREG_PDOWN_RF_VCO_ID,
		PM_VREG_PDOWN_MPLL_ID,
		PM_VREG_PDOWN_S2_ID,
		PM_VREG_PDOWN_S3_ID,
		PM_VREG_PDOWN_RFUBM_ID,

		/* new for HAN */
		PM_VREG_PDOWN_RF1_ID,
		PM_VREG_PDOWN_RF2_ID,
		PM_VREG_PDOWN_RFA_ID,
		PM_VREG_PDOWN_CDC2_ID,
		PM_VREG_PDOWN_RFTX2_ID,
		PM_VREG_PDOWN_USIM_ID,
		PM_VREG_PDOWN_USB2P6_ID,
		PM_VREG_PDOWN_USB3P3_ID,
		PM_VREG_PDOWN_INVALID_ID,

		/* backward compatible enums only */
		PM_VREG_PDOWN_CAM_ID = PM_VREG_PDOWN_GP1_ID,
		PM_VREG_PDOWN_MDDI_ID = PM_VREG_PDOWN_GP2_ID,
		PM_VREG_PDOWN_RUIM2_ID = PM_VREG_PDOWN_GP3_ID,
		PM_VREG_PDOWN_AUX_ID = PM_VREG_PDOWN_GP4_ID,
		PM_VREG_PDOWN_AUX2_ID = PM_VREG_PDOWN_GP5_ID,
		PM_VREG_PDOWN_BT_ID = PM_VREG_PDOWN_GP6_ID,

		PM_VREG_PDOWN_MSME_ID = PM_VREG_PDOWN_MSME1_ID,
		PM_VREG_PDOWN_MSMC_ID = PM_VREG_PDOWN_MSMC1_ID,
		PM_VREG_PDOWN_RFA1_ID = PM_VREG_PDOWN_RFRX2_ID,
		PM_VREG_PDOWN_RFA2_ID = PM_VREG_PDOWN_RFTX2_ID,
		PM_VREG_PDOWN_XO_ID = PM_VREG_PDOWN_TCXO_ID
		};

		/* gpio info for PCOM_RPC_GPIO_TLMM_CONFIG_EX */

		#define GPIO_ENABLE 0
		#define GPIO_DISABLE 1

		#define GPIO_INPUT 0
		#define GPIO_OUTPUT 1

		#define GPIO_NO_PULL 0
		#define GPIO_PULL_DOWN 1
		#define GPIO_KEEPER 2
		#define GPIO_PULL_UP 3

		#define GPIO_2MA 0
		#define GPIO_4MA 1
		#define GPIO_6MA 2
		#define GPIO_8MA 3
		#define GPIO_10MA 4
		#define GPIO_12MA 5
		#define GPIO_14MA 6
		#define GPIO_16MA 7

		#define PCOM_GPIO_CFG(gpio, func, dir, pull, drvstr) \
		((((gpio) & 0x3FF) << 4) \| \
		((func) & 0xf) \| \
		(((dir) & 0x1) << 14) \| \
		(((pull) & 0x3) << 15) \| \
		(((drvstr) & 0xF) << 17))

		int msm_proc_comm(unsigned cmd, unsigned data1, unsigned data2);

		#endif

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