| /* arch/arm/mach-msm/smd.c |
| * |
| * Copyright (C) 2007 Google, Inc. |
| * Copyright (c) 2008-2012, Code Aurora Forum. All rights reserved. |
| * 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/platform_device.h> |
| #include <linux/module.h> |
| #include <linux/fs.h> |
| #include <linux/cdev.h> |
| #include <linux/device.h> |
| #include <linux/wait.h> |
| #include <linux/interrupt.h> |
| #include <linux/irq.h> |
| #include <linux/list.h> |
| #include <linux/slab.h> |
| #include <linux/delay.h> |
| #include <linux/io.h> |
| #include <linux/termios.h> |
| #include <linux/ctype.h> |
| #include <linux/remote_spinlock.h> |
| #include <linux/uaccess.h> |
| #include <linux/kfifo.h> |
| #include <linux/wakelock.h> |
| #include <linux/notifier.h> |
| #include <mach/msm_smd.h> |
| #include <mach/msm_iomap.h> |
| #include <mach/system.h> |
| #include <mach/subsystem_notif.h> |
| #include <mach/socinfo.h> |
| |
| #include "smd_private.h" |
| #include "proc_comm.h" |
| #include "modem_notifier.h" |
| |
| #if defined(CONFIG_ARCH_QSD8X50) || defined(CONFIG_ARCH_MSM8X60) \ |
| || defined(CONFIG_ARCH_MSM8960) || defined(CONFIG_ARCH_FSM9XXX) \ |
| || defined(CONFIG_ARCH_MSM9615) || defined(CONFIG_ARCH_APQ8064) |
| #define CONFIG_QDSP6 1 |
| #endif |
| |
| #if defined(CONFIG_ARCH_MSM8X60) || defined(CONFIG_ARCH_MSM8960) \ |
| || defined(CONFIG_ARCH_APQ8064) |
| #define CONFIG_DSPS 1 |
| #endif |
| |
| #if defined(CONFIG_ARCH_MSM8960) \ |
| || defined(CONFIG_ARCH_APQ8064) |
| #define CONFIG_WCNSS 1 |
| #define CONFIG_DSPS_SMSM 1 |
| #endif |
| |
| #define MODULE_NAME "msm_smd" |
| #define SMEM_VERSION 0x000B |
| #define SMD_VERSION 0x00020000 |
| #define SMSM_SNAPSHOT_CNT 64 |
| |
| uint32_t SMSM_NUM_ENTRIES = 8; |
| uint32_t SMSM_NUM_HOSTS = 3; |
| |
| enum { |
| MSM_SMD_DEBUG = 1U << 0, |
| MSM_SMSM_DEBUG = 1U << 1, |
| MSM_SMD_INFO = 1U << 2, |
| MSM_SMSM_INFO = 1U << 3, |
| MSM_SMx_POWER_INFO = 1U << 4, |
| }; |
| |
| struct smsm_shared_info { |
| uint32_t *state; |
| uint32_t *intr_mask; |
| uint32_t *intr_mux; |
| }; |
| |
| static struct smsm_shared_info smsm_info; |
| static struct kfifo smsm_snapshot_fifo; |
| static struct wake_lock smsm_snapshot_wakelock; |
| static int smsm_snapshot_count; |
| static DEFINE_SPINLOCK(smsm_snapshot_count_lock); |
| |
| struct smsm_size_info_type { |
| uint32_t num_hosts; |
| uint32_t num_entries; |
| uint32_t reserved0; |
| uint32_t reserved1; |
| }; |
| |
| struct smsm_state_cb_info { |
| struct list_head cb_list; |
| uint32_t mask; |
| void *data; |
| void (*notify)(void *data, uint32_t old_state, uint32_t new_state); |
| }; |
| |
| struct smsm_state_info { |
| struct list_head callbacks; |
| uint32_t last_value; |
| }; |
| |
| struct interrupt_config_item { |
| /* must be initialized */ |
| irqreturn_t (*irq_handler)(int req, void *data); |
| /* outgoing interrupt config (set from platform data) */ |
| uint32_t out_bit_pos; |
| void __iomem *out_base; |
| uint32_t out_offset; |
| }; |
| |
| struct interrupt_config { |
| struct interrupt_config_item smd; |
| struct interrupt_config_item smsm; |
| }; |
| |
| static irqreturn_t smd_modem_irq_handler(int irq, void *data); |
| static irqreturn_t smsm_modem_irq_handler(int irq, void *data); |
| static irqreturn_t smd_dsp_irq_handler(int irq, void *data); |
| static irqreturn_t smsm_dsp_irq_handler(int irq, void *data); |
| static irqreturn_t smd_dsps_irq_handler(int irq, void *data); |
| static irqreturn_t smsm_dsps_irq_handler(int irq, void *data); |
| static irqreturn_t smd_wcnss_irq_handler(int irq, void *data); |
| static irqreturn_t smsm_wcnss_irq_handler(int irq, void *data); |
| static irqreturn_t smsm_irq_handler(int irq, void *data); |
| |
| static struct interrupt_config private_intr_config[NUM_SMD_SUBSYSTEMS] = { |
| [SMD_MODEM] = { |
| .smd.irq_handler = smd_modem_irq_handler, |
| .smsm.irq_handler = smsm_modem_irq_handler, |
| }, |
| [SMD_Q6] = { |
| .smd.irq_handler = smd_dsp_irq_handler, |
| .smsm.irq_handler = smsm_dsp_irq_handler, |
| }, |
| [SMD_DSPS] = { |
| .smd.irq_handler = smd_dsps_irq_handler, |
| .smsm.irq_handler = smsm_dsps_irq_handler, |
| }, |
| [SMD_WCNSS] = { |
| .smd.irq_handler = smd_wcnss_irq_handler, |
| .smsm.irq_handler = smsm_wcnss_irq_handler, |
| }, |
| }; |
| struct interrupt_stat interrupt_stats[NUM_SMD_SUBSYSTEMS]; |
| |
| #define SMSM_STATE_ADDR(entry) (smsm_info.state + entry) |
| #define SMSM_INTR_MASK_ADDR(entry, host) (smsm_info.intr_mask + \ |
| entry * SMSM_NUM_HOSTS + host) |
| #define SMSM_INTR_MUX_ADDR(entry) (smsm_info.intr_mux + entry) |
| |
| /* Internal definitions which are not exported in some targets */ |
| enum { |
| SMSM_APPS_DEM_I = 3, |
| }; |
| |
| static int msm_smd_debug_mask; |
| module_param_named(debug_mask, msm_smd_debug_mask, |
| int, S_IRUGO | S_IWUSR | S_IWGRP); |
| |
| #if defined(CONFIG_MSM_SMD_DEBUG) |
| #define SMD_DBG(x...) do { \ |
| if (msm_smd_debug_mask & MSM_SMD_DEBUG) \ |
| printk(KERN_DEBUG x); \ |
| } while (0) |
| |
| #define SMSM_DBG(x...) do { \ |
| if (msm_smd_debug_mask & MSM_SMSM_DEBUG) \ |
| printk(KERN_DEBUG x); \ |
| } while (0) |
| |
| #define SMD_INFO(x...) do { \ |
| if (msm_smd_debug_mask & MSM_SMD_INFO) \ |
| printk(KERN_INFO x); \ |
| } while (0) |
| |
| #define SMSM_INFO(x...) do { \ |
| if (msm_smd_debug_mask & MSM_SMSM_INFO) \ |
| printk(KERN_INFO x); \ |
| } while (0) |
| #define SMx_POWER_INFO(x...) do { \ |
| if (msm_smd_debug_mask & MSM_SMx_POWER_INFO) \ |
| printk(KERN_INFO x); \ |
| } while (0) |
| #else |
| #define SMD_DBG(x...) do { } while (0) |
| #define SMSM_DBG(x...) do { } while (0) |
| #define SMD_INFO(x...) do { } while (0) |
| #define SMSM_INFO(x...) do { } while (0) |
| #define SMx_POWER_INFO(x...) do { } while (0) |
| #endif |
| |
| static unsigned last_heap_free = 0xffffffff; |
| |
| static inline void smd_write_intr(unsigned int val, |
| const void __iomem *addr); |
| |
| #if defined(CONFIG_ARCH_MSM7X30) |
| #define MSM_TRIG_A2M_SMD_INT \ |
| (smd_write_intr(1 << 0, MSM_APCS_GCC_BASE + 0x8)) |
| #define MSM_TRIG_A2Q6_SMD_INT \ |
| (smd_write_intr(1 << 8, MSM_APCS_GCC_BASE + 0x8)) |
| #define MSM_TRIG_A2M_SMSM_INT \ |
| (smd_write_intr(1 << 5, MSM_APCS_GCC_BASE + 0x8)) |
| #define MSM_TRIG_A2Q6_SMSM_INT \ |
| (smd_write_intr(1 << 8, MSM_APCS_GCC_BASE + 0x8)) |
| #define MSM_TRIG_A2DSPS_SMD_INT |
| #define MSM_TRIG_A2DSPS_SMSM_INT |
| #define MSM_TRIG_A2WCNSS_SMD_INT |
| #define MSM_TRIG_A2WCNSS_SMSM_INT |
| #elif defined(CONFIG_ARCH_MSM8X60) |
| #define MSM_TRIG_A2M_SMD_INT \ |
| (smd_write_intr(1 << 3, MSM_GCC_BASE + 0x8)) |
| #define MSM_TRIG_A2Q6_SMD_INT \ |
| (smd_write_intr(1 << 15, MSM_GCC_BASE + 0x8)) |
| #define MSM_TRIG_A2M_SMSM_INT \ |
| (smd_write_intr(1 << 4, MSM_GCC_BASE + 0x8)) |
| #define MSM_TRIG_A2Q6_SMSM_INT \ |
| (smd_write_intr(1 << 14, MSM_GCC_BASE + 0x8)) |
| #define MSM_TRIG_A2DSPS_SMD_INT \ |
| (smd_write_intr(1, MSM_SIC_NON_SECURE_BASE + 0x4080)) |
| #define MSM_TRIG_A2DSPS_SMSM_INT |
| #define MSM_TRIG_A2WCNSS_SMD_INT |
| #define MSM_TRIG_A2WCNSS_SMSM_INT |
| #elif defined(CONFIG_ARCH_MSM9615) |
| #define MSM_TRIG_A2M_SMD_INT \ |
| (smd_write_intr(1 << 3, MSM_APCS_GCC_BASE + 0x8)) |
| #define MSM_TRIG_A2Q6_SMD_INT \ |
| (smd_write_intr(1 << 15, MSM_APCS_GCC_BASE + 0x8)) |
| #define MSM_TRIG_A2M_SMSM_INT \ |
| (smd_write_intr(1 << 4, MSM_APCS_GCC_BASE + 0x8)) |
| #define MSM_TRIG_A2Q6_SMSM_INT \ |
| (smd_write_intr(1 << 14, MSM_APCS_GCC_BASE + 0x8)) |
| #define MSM_TRIG_A2DSPS_SMD_INT |
| #define MSM_TRIG_A2DSPS_SMSM_INT |
| #define MSM_TRIG_A2WCNSS_SMD_INT |
| #define MSM_TRIG_A2WCNSS_SMSM_INT |
| #elif defined(CONFIG_ARCH_FSM9XXX) |
| #define MSM_TRIG_A2Q6_SMD_INT \ |
| (smd_write_intr(1 << 10, MSM_GCC_BASE + 0x8)) |
| #define MSM_TRIG_A2Q6_SMSM_INT \ |
| (smd_write_intr(1 << 10, MSM_GCC_BASE + 0x8)) |
| #define MSM_TRIG_A2M_SMD_INT \ |
| (smd_write_intr(1 << 0, MSM_GCC_BASE + 0x8)) |
| #define MSM_TRIG_A2M_SMSM_INT \ |
| (smd_write_intr(1 << 5, MSM_GCC_BASE + 0x8)) |
| #define MSM_TRIG_A2DSPS_SMD_INT |
| #define MSM_TRIG_A2DSPS_SMSM_INT |
| #define MSM_TRIG_A2WCNSS_SMD_INT |
| #define MSM_TRIG_A2WCNSS_SMSM_INT |
| #elif defined(CONFIG_ARCH_MSM7X01A) || defined(CONFIG_ARCH_MSM7x25) |
| #define MSM_TRIG_A2M_SMD_INT \ |
| (smd_write_intr(1, MSM_CSR_BASE + 0x400 + (0) * 4)) |
| #define MSM_TRIG_A2Q6_SMD_INT |
| #define MSM_TRIG_A2M_SMSM_INT \ |
| (smd_write_intr(1, MSM_CSR_BASE + 0x400 + (5) * 4)) |
| #define MSM_TRIG_A2Q6_SMSM_INT |
| #define MSM_TRIG_A2DSPS_SMD_INT |
| #define MSM_TRIG_A2DSPS_SMSM_INT |
| #define MSM_TRIG_A2WCNSS_SMD_INT |
| #define MSM_TRIG_A2WCNSS_SMSM_INT |
| #elif defined(CONFIG_ARCH_MSM7X27) || defined(CONFIG_ARCH_MSM7X27A) |
| #define MSM_TRIG_A2M_SMD_INT \ |
| (smd_write_intr(1, MSM_CSR_BASE + 0x400 + (0) * 4)) |
| #define MSM_TRIG_A2Q6_SMD_INT |
| #define MSM_TRIG_A2M_SMSM_INT \ |
| (smd_write_intr(1, MSM_CSR_BASE + 0x400 + (5) * 4)) |
| #define MSM_TRIG_A2Q6_SMSM_INT |
| #define MSM_TRIG_A2DSPS_SMD_INT |
| #define MSM_TRIG_A2DSPS_SMSM_INT |
| #define MSM_TRIG_A2WCNSS_SMD_INT |
| #define MSM_TRIG_A2WCNSS_SMSM_INT |
| #else /* use platform device / device tree configuration */ |
| #define MSM_TRIG_A2M_SMD_INT |
| #define MSM_TRIG_A2Q6_SMD_INT |
| #define MSM_TRIG_A2M_SMSM_INT |
| #define MSM_TRIG_A2Q6_SMSM_INT |
| #define MSM_TRIG_A2DSPS_SMD_INT |
| #define MSM_TRIG_A2DSPS_SMSM_INT |
| #define MSM_TRIG_A2WCNSS_SMD_INT |
| #define MSM_TRIG_A2WCNSS_SMSM_INT |
| #endif |
| |
| /* |
| * stub out legacy macros if they are not being used so that the legacy |
| * code compiles even though it is not used |
| * |
| * these definitions should not be used in active code and will cause |
| * an early failure |
| */ |
| #ifndef INT_A9_M2A_0 |
| #define INT_A9_M2A_0 -1 |
| #endif |
| #ifndef INT_A9_M2A_5 |
| #define INT_A9_M2A_5 -1 |
| #endif |
| #ifndef INT_ADSP_A11 |
| #define INT_ADSP_A11 -1 |
| #endif |
| #ifndef INT_ADSP_A11_SMSM |
| #define INT_ADSP_A11_SMSM -1 |
| #endif |
| #ifndef INT_DSPS_A11 |
| #define INT_DSPS_A11 -1 |
| #endif |
| #ifndef INT_DSPS_A11_SMSM |
| #define INT_DSPS_A11_SMSM -1 |
| #endif |
| #ifndef INT_WCNSS_A11 |
| #define INT_WCNSS_A11 -1 |
| #endif |
| #ifndef INT_WCNSS_A11_SMSM |
| #define INT_WCNSS_A11_SMSM -1 |
| #endif |
| |
| #define SMD_LOOPBACK_CID 100 |
| |
| #define SMEM_SPINLOCK_SMEM_ALLOC "S:3" |
| static remote_spinlock_t remote_spinlock; |
| |
| static LIST_HEAD(smd_ch_list_loopback); |
| static void smd_fake_irq_handler(unsigned long arg); |
| static void smsm_cb_snapshot(void); |
| |
| static void notify_smsm_cb_clients_worker(struct work_struct *work); |
| static DECLARE_WORK(smsm_cb_work, notify_smsm_cb_clients_worker); |
| static DEFINE_MUTEX(smsm_lock); |
| static struct smsm_state_info *smsm_states; |
| static int spinlocks_initialized; |
| static RAW_NOTIFIER_HEAD(smsm_driver_state_notifier_list); |
| static DEFINE_MUTEX(smsm_driver_state_notifier_lock); |
| static void smsm_driver_state_notify(uint32_t state, void *data); |
| |
| static inline void smd_write_intr(unsigned int val, |
| const void __iomem *addr) |
| { |
| wmb(); |
| __raw_writel(val, addr); |
| } |
| |
| #ifdef CONFIG_WCNSS |
| static inline void wakeup_v1_riva(void) |
| { |
| /* |
| * workaround hack for RIVA v1 hardware bug |
| * trigger GPIO 40 to wake up RIVA from power collaspe |
| * not to be sent to customers |
| */ |
| if (SOCINFO_VERSION_MAJOR(socinfo_get_version()) == 1) { |
| __raw_writel(0x0, MSM_TLMM_BASE + 0x1284); |
| __raw_writel(0x2, MSM_TLMM_BASE + 0x1284); |
| } |
| /* end workaround */ |
| } |
| #else |
| static inline void wakeup_v1_riva(void) {} |
| #endif |
| |
| static inline void notify_modem_smd(void) |
| { |
| static const struct interrupt_config_item *intr |
| = &private_intr_config[SMD_MODEM].smd; |
| if (intr->out_base) { |
| ++interrupt_stats[SMD_MODEM].smd_out_config_count; |
| smd_write_intr(intr->out_bit_pos, |
| intr->out_base + intr->out_offset); |
| } else { |
| ++interrupt_stats[SMD_MODEM].smd_out_hardcode_count; |
| MSM_TRIG_A2M_SMD_INT; |
| } |
| } |
| |
| static inline void notify_dsp_smd(void) |
| { |
| static const struct interrupt_config_item *intr |
| = &private_intr_config[SMD_Q6].smd; |
| if (intr->out_base) { |
| ++interrupt_stats[SMD_Q6].smd_out_config_count; |
| smd_write_intr(intr->out_bit_pos, |
| intr->out_base + intr->out_offset); |
| } else { |
| ++interrupt_stats[SMD_Q6].smd_out_hardcode_count; |
| MSM_TRIG_A2Q6_SMD_INT; |
| } |
| } |
| |
| static inline void notify_dsps_smd(void) |
| { |
| static const struct interrupt_config_item *intr |
| = &private_intr_config[SMD_DSPS].smd; |
| if (intr->out_base) { |
| ++interrupt_stats[SMD_DSPS].smd_out_config_count; |
| smd_write_intr(intr->out_bit_pos, |
| intr->out_base + intr->out_offset); |
| } else { |
| ++interrupt_stats[SMD_DSPS].smd_out_hardcode_count; |
| MSM_TRIG_A2DSPS_SMD_INT; |
| } |
| } |
| |
| static inline void notify_wcnss_smd(void) |
| { |
| static const struct interrupt_config_item *intr |
| = &private_intr_config[SMD_WCNSS].smd; |
| wakeup_v1_riva(); |
| |
| if (intr->out_base) { |
| ++interrupt_stats[SMD_WCNSS].smd_out_config_count; |
| smd_write_intr(intr->out_bit_pos, |
| intr->out_base + intr->out_offset); |
| } else { |
| ++interrupt_stats[SMD_WCNSS].smd_out_hardcode_count; |
| MSM_TRIG_A2WCNSS_SMD_INT; |
| } |
| } |
| |
| static inline void notify_modem_smsm(void) |
| { |
| static const struct interrupt_config_item *intr |
| = &private_intr_config[SMD_MODEM].smsm; |
| if (intr->out_base) { |
| ++interrupt_stats[SMD_MODEM].smsm_out_config_count; |
| smd_write_intr(intr->out_bit_pos, |
| intr->out_base + intr->out_offset); |
| } else { |
| ++interrupt_stats[SMD_MODEM].smsm_out_hardcode_count; |
| MSM_TRIG_A2M_SMSM_INT; |
| } |
| } |
| |
| static inline void notify_dsp_smsm(void) |
| { |
| static const struct interrupt_config_item *intr |
| = &private_intr_config[SMD_Q6].smsm; |
| if (intr->out_base) { |
| ++interrupt_stats[SMD_Q6].smsm_out_config_count; |
| smd_write_intr(intr->out_bit_pos, |
| intr->out_base + intr->out_offset); |
| } else { |
| ++interrupt_stats[SMD_Q6].smsm_out_hardcode_count; |
| MSM_TRIG_A2Q6_SMSM_INT; |
| } |
| } |
| |
| static inline void notify_dsps_smsm(void) |
| { |
| static const struct interrupt_config_item *intr |
| = &private_intr_config[SMD_DSPS].smsm; |
| if (intr->out_base) { |
| ++interrupt_stats[SMD_DSPS].smsm_out_config_count; |
| smd_write_intr(intr->out_bit_pos, |
| intr->out_base + intr->out_offset); |
| } else { |
| ++interrupt_stats[SMD_DSPS].smsm_out_hardcode_count; |
| MSM_TRIG_A2DSPS_SMSM_INT; |
| } |
| } |
| |
| static inline void notify_wcnss_smsm(void) |
| { |
| static const struct interrupt_config_item *intr |
| = &private_intr_config[SMD_WCNSS].smsm; |
| wakeup_v1_riva(); |
| |
| if (intr->out_base) { |
| ++interrupt_stats[SMD_WCNSS].smsm_out_config_count; |
| smd_write_intr(intr->out_bit_pos, |
| intr->out_base + intr->out_offset); |
| } else { |
| ++interrupt_stats[SMD_WCNSS].smsm_out_hardcode_count; |
| MSM_TRIG_A2WCNSS_SMSM_INT; |
| } |
| } |
| |
| static void notify_other_smsm(uint32_t smsm_entry, uint32_t notify_mask) |
| { |
| /* older protocol don't use smsm_intr_mask, |
| but still communicates with modem */ |
| if (!smsm_info.intr_mask || |
| (__raw_readl(SMSM_INTR_MASK_ADDR(smsm_entry, SMSM_MODEM)) |
| & notify_mask)) |
| notify_modem_smsm(); |
| |
| if (smsm_info.intr_mask && |
| (__raw_readl(SMSM_INTR_MASK_ADDR(smsm_entry, SMSM_Q6)) |
| & notify_mask)) { |
| uint32_t mux_val; |
| |
| if (cpu_is_qsd8x50() && smsm_info.intr_mux) { |
| mux_val = __raw_readl( |
| SMSM_INTR_MUX_ADDR(SMEM_APPS_Q6_SMSM)); |
| mux_val++; |
| __raw_writel(mux_val, |
| SMSM_INTR_MUX_ADDR(SMEM_APPS_Q6_SMSM)); |
| } |
| notify_dsp_smsm(); |
| } |
| |
| if (smsm_info.intr_mask && |
| (__raw_readl(SMSM_INTR_MASK_ADDR(smsm_entry, SMSM_WCNSS)) |
| & notify_mask)) { |
| notify_wcnss_smsm(); |
| } |
| |
| if (smsm_info.intr_mask && |
| (__raw_readl(SMSM_INTR_MASK_ADDR(smsm_entry, SMSM_DSPS)) |
| & notify_mask)) { |
| notify_dsps_smsm(); |
| } |
| |
| smsm_cb_snapshot(); |
| } |
| |
| void smd_diag(void) |
| { |
| char *x; |
| int size; |
| |
| x = smem_find(ID_DIAG_ERR_MSG, SZ_DIAG_ERR_MSG); |
| if (x != 0) { |
| x[SZ_DIAG_ERR_MSG - 1] = 0; |
| SMD_INFO("smem: DIAG '%s'\n", x); |
| } |
| |
| x = smem_get_entry(SMEM_ERR_CRASH_LOG, &size); |
| if (x != 0) { |
| x[size - 1] = 0; |
| pr_err("smem: CRASH LOG\n'%s'\n", x); |
| } |
| } |
| |
| |
| static void handle_modem_crash(void) |
| { |
| pr_err("MODEM/AMSS has CRASHED\n"); |
| smd_diag(); |
| |
| /* hard reboot if possible FIXME |
| if (msm_reset_hook) |
| msm_reset_hook(); |
| */ |
| |
| /* in this case the modem or watchdog should reboot us */ |
| for (;;) |
| ; |
| } |
| |
| int smsm_check_for_modem_crash(void) |
| { |
| /* if the modem's not ready yet, we have to hope for the best */ |
| if (!smsm_info.state) |
| return 0; |
| |
| if (__raw_readl(SMSM_STATE_ADDR(SMSM_MODEM_STATE)) & SMSM_RESET) { |
| handle_modem_crash(); |
| return -1; |
| } |
| return 0; |
| } |
| EXPORT_SYMBOL(smsm_check_for_modem_crash); |
| |
| /* the spinlock is used to synchronize between the |
| * irq handler and code that mutates the channel |
| * list or fiddles with channel state |
| */ |
| static DEFINE_SPINLOCK(smd_lock); |
| DEFINE_SPINLOCK(smem_lock); |
| |
| /* the mutex is used during open() and close() |
| * operations to avoid races while creating or |
| * destroying smd_channel structures |
| */ |
| static DEFINE_MUTEX(smd_creation_mutex); |
| |
| static int smd_initialized; |
| |
| struct smd_shared_v1 { |
| struct smd_half_channel ch0; |
| unsigned char data0[SMD_BUF_SIZE]; |
| struct smd_half_channel ch1; |
| unsigned char data1[SMD_BUF_SIZE]; |
| }; |
| |
| struct smd_shared_v2 { |
| struct smd_half_channel ch0; |
| struct smd_half_channel ch1; |
| }; |
| |
| struct smd_channel { |
| volatile struct smd_half_channel *send; |
| volatile struct smd_half_channel *recv; |
| unsigned char *send_data; |
| unsigned char *recv_data; |
| unsigned fifo_size; |
| unsigned fifo_mask; |
| struct list_head ch_list; |
| |
| unsigned current_packet; |
| unsigned n; |
| void *priv; |
| void (*notify)(void *priv, unsigned flags); |
| |
| int (*read)(smd_channel_t *ch, void *data, int len, int user_buf); |
| int (*write)(smd_channel_t *ch, const void *data, int len, |
| int user_buf); |
| int (*read_avail)(smd_channel_t *ch); |
| int (*write_avail)(smd_channel_t *ch); |
| int (*read_from_cb)(smd_channel_t *ch, void *data, int len, |
| int user_buf); |
| |
| void (*update_state)(smd_channel_t *ch); |
| unsigned last_state; |
| void (*notify_other_cpu)(void); |
| |
| char name[20]; |
| struct platform_device pdev; |
| unsigned type; |
| |
| int pending_pkt_sz; |
| |
| char is_pkt_ch; |
| }; |
| |
| struct edge_to_pid { |
| uint32_t local_pid; |
| uint32_t remote_pid; |
| char subsys_name[SMD_MAX_CH_NAME_LEN]; |
| }; |
| |
| /** |
| * Maps edge type to local and remote processor ID's. |
| */ |
| static struct edge_to_pid edge_to_pids[] = { |
| [SMD_APPS_MODEM] = {SMD_APPS, SMD_MODEM, "modem"}, |
| [SMD_APPS_QDSP] = {SMD_APPS, SMD_Q6, "q6"}, |
| [SMD_MODEM_QDSP] = {SMD_MODEM, SMD_Q6}, |
| [SMD_APPS_DSPS] = {SMD_APPS, SMD_DSPS, "dsps"}, |
| [SMD_MODEM_DSPS] = {SMD_MODEM, SMD_DSPS}, |
| [SMD_QDSP_DSPS] = {SMD_Q6, SMD_DSPS}, |
| [SMD_APPS_WCNSS] = {SMD_APPS, SMD_WCNSS, "wcnss"}, |
| [SMD_MODEM_WCNSS] = {SMD_MODEM, SMD_WCNSS}, |
| [SMD_QDSP_WCNSS] = {SMD_Q6, SMD_WCNSS}, |
| [SMD_DSPS_WCNSS] = {SMD_DSPS, SMD_WCNSS}, |
| [SMD_APPS_Q6FW] = {SMD_APPS, SMD_MODEM_Q6_FW}, |
| [SMD_MODEM_Q6FW] = {SMD_MODEM, SMD_MODEM_Q6_FW}, |
| [SMD_QDSP_Q6FW] = {SMD_Q6, SMD_MODEM_Q6_FW}, |
| [SMD_DSPS_Q6FW] = {SMD_DSPS, SMD_MODEM_Q6_FW}, |
| [SMD_WCNSS_Q6FW] = {SMD_WCNSS, SMD_MODEM_Q6_FW}, |
| }; |
| |
| struct restart_notifier_block { |
| unsigned processor; |
| char *name; |
| struct notifier_block nb; |
| }; |
| |
| static int disable_smsm_reset_handshake; |
| static struct platform_device loopback_tty_pdev = {.name = "LOOPBACK_TTY"}; |
| |
| static LIST_HEAD(smd_ch_closed_list); |
| static LIST_HEAD(smd_ch_closing_list); |
| static LIST_HEAD(smd_ch_to_close_list); |
| static LIST_HEAD(smd_ch_list_modem); |
| static LIST_HEAD(smd_ch_list_dsp); |
| static LIST_HEAD(smd_ch_list_dsps); |
| static LIST_HEAD(smd_ch_list_wcnss); |
| |
| static unsigned char smd_ch_allocated[64]; |
| static struct work_struct probe_work; |
| |
| static void finalize_channel_close_fn(struct work_struct *work); |
| static DECLARE_WORK(finalize_channel_close_work, finalize_channel_close_fn); |
| static struct workqueue_struct *channel_close_wq; |
| |
| static int smd_alloc_channel(struct smd_alloc_elm *alloc_elm); |
| |
| /* on smp systems, the probe might get called from multiple cores, |
| hence use a lock */ |
| static DEFINE_MUTEX(smd_probe_lock); |
| |
| static void smd_channel_probe_worker(struct work_struct *work) |
| { |
| struct smd_alloc_elm *shared; |
| unsigned n; |
| uint32_t type; |
| |
| shared = smem_find(ID_CH_ALLOC_TBL, sizeof(*shared) * 64); |
| |
| if (!shared) { |
| pr_err("%s: allocation table not initialized\n", __func__); |
| return; |
| } |
| |
| mutex_lock(&smd_probe_lock); |
| for (n = 0; n < 64; n++) { |
| if (smd_ch_allocated[n]) |
| continue; |
| |
| /* channel should be allocated only if APPS |
| processor is involved */ |
| type = SMD_CHANNEL_TYPE(shared[n].type); |
| if ((type != SMD_APPS_MODEM) && (type != SMD_APPS_QDSP) && |
| (type != SMD_APPS_DSPS) && (type != SMD_APPS_WCNSS)) |
| continue; |
| if (!shared[n].ref_count) |
| continue; |
| if (!shared[n].name[0]) |
| continue; |
| |
| if (!smd_alloc_channel(&shared[n])) |
| smd_ch_allocated[n] = 1; |
| else |
| SMD_INFO("Probe skipping ch %d, not allocated\n", n); |
| } |
| mutex_unlock(&smd_probe_lock); |
| } |
| |
| /** |
| * Lookup processor ID and determine if it belongs to the proved edge |
| * type. |
| * |
| * @shared2: Pointer to v2 shared channel structure |
| * @type: Edge type |
| * @pid: Processor ID of processor on edge |
| * @local_ch: Channel that belongs to processor @pid |
| * @remote_ch: Other side of edge contained @pid |
| * |
| * Returns 0 for not on edge, 1 for found on edge |
| */ |
| static int pid_is_on_edge(struct smd_shared_v2 *shared2, |
| uint32_t type, uint32_t pid, |
| struct smd_half_channel **local_ch, |
| struct smd_half_channel **remote_ch |
| ) |
| { |
| int ret = 0; |
| struct edge_to_pid *edge; |
| |
| *local_ch = 0; |
| *remote_ch = 0; |
| |
| if (!shared2 || (type >= ARRAY_SIZE(edge_to_pids))) |
| return 0; |
| |
| edge = &edge_to_pids[type]; |
| if (edge->local_pid != edge->remote_pid) { |
| if (pid == edge->local_pid) { |
| *local_ch = &shared2->ch0; |
| *remote_ch = &shared2->ch1; |
| ret = 1; |
| } else if (pid == edge->remote_pid) { |
| *local_ch = &shared2->ch1; |
| *remote_ch = &shared2->ch0; |
| ret = 1; |
| } |
| } |
| |
| return ret; |
| } |
| |
| /* |
| * Returns a pointer to the subsystem name or NULL if no |
| * subsystem name is available. |
| * |
| * @type - Edge definition |
| */ |
| const char *smd_edge_to_subsystem(uint32_t type) |
| { |
| const char *subsys = NULL; |
| |
| if (type < ARRAY_SIZE(edge_to_pids)) { |
| subsys = edge_to_pids[type].subsys_name; |
| if (subsys[0] == 0x0) |
| subsys = NULL; |
| } |
| return subsys; |
| } |
| EXPORT_SYMBOL(smd_edge_to_subsystem); |
| |
| /* |
| * Returns a pointer to the subsystem name given the |
| * remote processor ID. |
| * |
| * @pid Remote processor ID |
| * @returns Pointer to subsystem name or NULL if not found |
| */ |
| const char *smd_pid_to_subsystem(uint32_t pid) |
| { |
| const char *subsys = NULL; |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(edge_to_pids); ++i) { |
| if (pid == edge_to_pids[i].remote_pid && |
| edge_to_pids[i].subsys_name[0] != 0x0 |
| ) { |
| subsys = edge_to_pids[i].subsys_name; |
| break; |
| } |
| } |
| |
| return subsys; |
| } |
| EXPORT_SYMBOL(smd_pid_to_subsystem); |
| |
| static void smd_reset_edge(struct smd_half_channel *ch, unsigned new_state) |
| { |
| if (ch->state != SMD_SS_CLOSED) { |
| ch->state = new_state; |
| ch->fDSR = 0; |
| ch->fCTS = 0; |
| ch->fCD = 0; |
| ch->fSTATE = 1; |
| } |
| } |
| |
| static void smd_channel_reset_state(struct smd_alloc_elm *shared, |
| unsigned new_state, unsigned pid) |
| { |
| unsigned n; |
| struct smd_shared_v2 *shared2; |
| uint32_t type; |
| struct smd_half_channel *local_ch; |
| struct smd_half_channel *remote_ch; |
| |
| for (n = 0; n < SMD_CHANNELS; n++) { |
| if (!shared[n].ref_count) |
| continue; |
| if (!shared[n].name[0]) |
| continue; |
| |
| type = SMD_CHANNEL_TYPE(shared[n].type); |
| shared2 = smem_alloc(SMEM_SMD_BASE_ID + n, sizeof(*shared2)); |
| if (!shared2) |
| continue; |
| |
| if (pid_is_on_edge(shared2, type, pid, &local_ch, &remote_ch)) |
| smd_reset_edge(local_ch, new_state); |
| |
| /* |
| * ModemFW is in the same subsystem as ModemSW, but has |
| * separate SMD edges that need to be reset. |
| */ |
| if (pid == SMSM_MODEM && |
| pid_is_on_edge(shared2, type, SMD_MODEM_Q6_FW, |
| &local_ch, &remote_ch)) |
| smd_reset_edge(local_ch, new_state); |
| } |
| } |
| |
| |
| void smd_channel_reset(uint32_t restart_pid) |
| { |
| struct smd_alloc_elm *shared; |
| unsigned long flags; |
| |
| SMD_DBG("%s: starting reset\n", __func__); |
| shared = smem_find(ID_CH_ALLOC_TBL, sizeof(*shared) * 64); |
| if (!shared) { |
| pr_err("%s: allocation table not initialized\n", __func__); |
| return; |
| } |
| |
| /* release any held spinlocks */ |
| remote_spin_release(&remote_spinlock, restart_pid); |
| remote_spin_release_all(restart_pid); |
| |
| /* reset SMSM entry */ |
| if (smsm_info.state) { |
| writel_relaxed(0, SMSM_STATE_ADDR(restart_pid)); |
| |
| /* restart SMSM init handshake */ |
| if (restart_pid == SMSM_MODEM) { |
| smsm_change_state(SMSM_APPS_STATE, |
| SMSM_INIT | SMSM_SMD_LOOPBACK | SMSM_RESET, |
| 0); |
| } |
| |
| /* notify SMSM processors */ |
| smsm_irq_handler(0, 0); |
| notify_modem_smsm(); |
| notify_dsp_smsm(); |
| notify_dsps_smsm(); |
| notify_wcnss_smsm(); |
| } |
| |
| /* change all remote states to CLOSING */ |
| mutex_lock(&smd_probe_lock); |
| spin_lock_irqsave(&smd_lock, flags); |
| smd_channel_reset_state(shared, SMD_SS_CLOSING, restart_pid); |
| spin_unlock_irqrestore(&smd_lock, flags); |
| mutex_unlock(&smd_probe_lock); |
| |
| /* notify SMD processors */ |
| mb(); |
| smd_fake_irq_handler(0); |
| notify_modem_smd(); |
| notify_dsp_smd(); |
| notify_dsps_smd(); |
| notify_wcnss_smd(); |
| |
| /* change all remote states to CLOSED */ |
| mutex_lock(&smd_probe_lock); |
| spin_lock_irqsave(&smd_lock, flags); |
| smd_channel_reset_state(shared, SMD_SS_CLOSED, restart_pid); |
| spin_unlock_irqrestore(&smd_lock, flags); |
| mutex_unlock(&smd_probe_lock); |
| |
| /* notify SMD processors */ |
| mb(); |
| smd_fake_irq_handler(0); |
| notify_modem_smd(); |
| notify_dsp_smd(); |
| notify_dsps_smd(); |
| notify_wcnss_smd(); |
| |
| SMD_DBG("%s: finished reset\n", __func__); |
| } |
| |
| /* how many bytes are available for reading */ |
| static int smd_stream_read_avail(struct smd_channel *ch) |
| { |
| return (ch->recv->head - ch->recv->tail) & ch->fifo_mask; |
| } |
| |
| /* how many bytes we are free to write */ |
| static int smd_stream_write_avail(struct smd_channel *ch) |
| { |
| return ch->fifo_mask - |
| ((ch->send->head - ch->send->tail) & ch->fifo_mask); |
| } |
| |
| static int smd_packet_read_avail(struct smd_channel *ch) |
| { |
| if (ch->current_packet) { |
| int n = smd_stream_read_avail(ch); |
| if (n > ch->current_packet) |
| n = ch->current_packet; |
| return n; |
| } else { |
| return 0; |
| } |
| } |
| |
| static int smd_packet_write_avail(struct smd_channel *ch) |
| { |
| int n = smd_stream_write_avail(ch); |
| return n > SMD_HEADER_SIZE ? n - SMD_HEADER_SIZE : 0; |
| } |
| |
| static int ch_is_open(struct smd_channel *ch) |
| { |
| return (ch->recv->state == SMD_SS_OPENED || |
| ch->recv->state == SMD_SS_FLUSHING) |
| && (ch->send->state == SMD_SS_OPENED); |
| } |
| |
| /* provide a pointer and length to readable data in the fifo */ |
| static unsigned ch_read_buffer(struct smd_channel *ch, void **ptr) |
| { |
| unsigned head = ch->recv->head; |
| unsigned tail = ch->recv->tail; |
| *ptr = (void *) (ch->recv_data + tail); |
| |
| if (tail <= head) |
| return head - tail; |
| else |
| return ch->fifo_size - tail; |
| } |
| |
| static int read_intr_blocked(struct smd_channel *ch) |
| { |
| return ch->recv->fBLOCKREADINTR; |
| } |
| |
| /* advance the fifo read pointer after data from ch_read_buffer is consumed */ |
| static void ch_read_done(struct smd_channel *ch, unsigned count) |
| { |
| BUG_ON(count > smd_stream_read_avail(ch)); |
| ch->recv->tail = (ch->recv->tail + count) & ch->fifo_mask; |
| wmb(); |
| ch->send->fTAIL = 1; |
| } |
| |
| /* basic read interface to ch_read_{buffer,done} used |
| * by smd_*_read() and update_packet_state() |
| * will read-and-discard if the _data pointer is null |
| */ |
| static int ch_read(struct smd_channel *ch, void *_data, int len, int user_buf) |
| { |
| void *ptr; |
| unsigned n; |
| unsigned char *data = _data; |
| int orig_len = len; |
| int r = 0; |
| |
| while (len > 0) { |
| n = ch_read_buffer(ch, &ptr); |
| if (n == 0) |
| break; |
| |
| if (n > len) |
| n = len; |
| if (_data) { |
| if (user_buf) { |
| r = copy_to_user(data, ptr, n); |
| if (r > 0) { |
| pr_err("%s: " |
| "copy_to_user could not copy " |
| "%i bytes.\n", |
| __func__, |
| r); |
| } |
| } else |
| memcpy(data, ptr, n); |
| } |
| |
| data += n; |
| len -= n; |
| ch_read_done(ch, n); |
| } |
| |
| return orig_len - len; |
| } |
| |
| static void update_stream_state(struct smd_channel *ch) |
| { |
| /* streams have no special state requiring updating */ |
| } |
| |
| static void update_packet_state(struct smd_channel *ch) |
| { |
| unsigned hdr[5]; |
| int r; |
| |
| /* can't do anything if we're in the middle of a packet */ |
| while (ch->current_packet == 0) { |
| /* discard 0 length packets if any */ |
| |
| /* don't bother unless we can get the full header */ |
| if (smd_stream_read_avail(ch) < SMD_HEADER_SIZE) |
| return; |
| |
| r = ch_read(ch, hdr, SMD_HEADER_SIZE, 0); |
| BUG_ON(r != SMD_HEADER_SIZE); |
| |
| ch->current_packet = hdr[0]; |
| } |
| } |
| |
| /* provide a pointer and length to next free space in the fifo */ |
| static unsigned ch_write_buffer(struct smd_channel *ch, void **ptr) |
| { |
| unsigned head = ch->send->head; |
| unsigned tail = ch->send->tail; |
| *ptr = (void *) (ch->send_data + head); |
| |
| if (head < tail) { |
| return tail - head - 1; |
| } else { |
| if (tail == 0) |
| return ch->fifo_size - head - 1; |
| else |
| return ch->fifo_size - head; |
| } |
| } |
| |
| /* advace the fifo write pointer after freespace |
| * from ch_write_buffer is filled |
| */ |
| static void ch_write_done(struct smd_channel *ch, unsigned count) |
| { |
| BUG_ON(count > smd_stream_write_avail(ch)); |
| ch->send->head = (ch->send->head + count) & ch->fifo_mask; |
| wmb(); |
| ch->send->fHEAD = 1; |
| } |
| |
| static void ch_set_state(struct smd_channel *ch, unsigned n) |
| { |
| if (n == SMD_SS_OPENED) { |
| ch->send->fDSR = 1; |
| ch->send->fCTS = 1; |
| ch->send->fCD = 1; |
| } else { |
| ch->send->fDSR = 0; |
| ch->send->fCTS = 0; |
| ch->send->fCD = 0; |
| } |
| ch->send->state = n; |
| ch->send->fSTATE = 1; |
| ch->notify_other_cpu(); |
| } |
| |
| static void do_smd_probe(void) |
| { |
| struct smem_shared *shared = (void *) MSM_SHARED_RAM_BASE; |
| if (shared->heap_info.free_offset != last_heap_free) { |
| last_heap_free = shared->heap_info.free_offset; |
| schedule_work(&probe_work); |
| } |
| } |
| |
| static void smd_state_change(struct smd_channel *ch, |
| unsigned last, unsigned next) |
| { |
| ch->last_state = next; |
| |
| SMD_INFO("SMD: ch %d %d -> %d\n", ch->n, last, next); |
| |
| switch (next) { |
| case SMD_SS_OPENING: |
| if (ch->send->state == SMD_SS_CLOSING || |
| ch->send->state == SMD_SS_CLOSED) { |
| ch->recv->tail = 0; |
| ch->send->head = 0; |
| ch->send->fBLOCKREADINTR = 0; |
| ch_set_state(ch, SMD_SS_OPENING); |
| } |
| break; |
| case SMD_SS_OPENED: |
| if (ch->send->state == SMD_SS_OPENING) { |
| ch_set_state(ch, SMD_SS_OPENED); |
| ch->notify(ch->priv, SMD_EVENT_OPEN); |
| } |
| break; |
| case SMD_SS_FLUSHING: |
| case SMD_SS_RESET: |
| /* we should force them to close? */ |
| break; |
| case SMD_SS_CLOSED: |
| if (ch->send->state == SMD_SS_OPENED) { |
| ch_set_state(ch, SMD_SS_CLOSING); |
| ch->current_packet = 0; |
| ch->pending_pkt_sz = 0; |
| ch->notify(ch->priv, SMD_EVENT_CLOSE); |
| } |
| break; |
| case SMD_SS_CLOSING: |
| if (ch->send->state == SMD_SS_CLOSED) { |
| list_move(&ch->ch_list, |
| &smd_ch_to_close_list); |
| queue_work(channel_close_wq, |
| &finalize_channel_close_work); |
| } |
| break; |
| } |
| } |
| |
| static void handle_smd_irq_closing_list(void) |
| { |
| unsigned long flags; |
| struct smd_channel *ch; |
| struct smd_channel *index; |
| unsigned tmp; |
| |
| spin_lock_irqsave(&smd_lock, flags); |
| list_for_each_entry_safe(ch, index, &smd_ch_closing_list, ch_list) { |
| if (ch->recv->fSTATE) |
| ch->recv->fSTATE = 0; |
| tmp = ch->recv->state; |
| if (tmp != ch->last_state) |
| smd_state_change(ch, ch->last_state, tmp); |
| } |
| spin_unlock_irqrestore(&smd_lock, flags); |
| } |
| |
| static void handle_smd_irq(struct list_head *list, void (*notify)(void)) |
| { |
| unsigned long flags; |
| struct smd_channel *ch; |
| unsigned ch_flags; |
| unsigned tmp; |
| unsigned char state_change; |
| |
| spin_lock_irqsave(&smd_lock, flags); |
| list_for_each_entry(ch, list, ch_list) { |
| state_change = 0; |
| ch_flags = 0; |
| if (ch_is_open(ch)) { |
| if (ch->recv->fHEAD) { |
| ch->recv->fHEAD = 0; |
| ch_flags |= 1; |
| } |
| if (ch->recv->fTAIL) { |
| ch->recv->fTAIL = 0; |
| ch_flags |= 2; |
| } |
| if (ch->recv->fSTATE) { |
| ch->recv->fSTATE = 0; |
| ch_flags |= 4; |
| } |
| } |
| tmp = ch->recv->state; |
| if (tmp != ch->last_state) { |
| SMx_POWER_INFO("SMD ch%d '%s' State change %d->%d\n", |
| ch->n, ch->name, ch->last_state, tmp); |
| smd_state_change(ch, ch->last_state, tmp); |
| state_change = 1; |
| } |
| if (ch_flags & 0x3) { |
| ch->update_state(ch); |
| SMx_POWER_INFO("SMD ch%d '%s' Data event r%d/w%d\n", |
| ch->n, ch->name, |
| ch->read_avail(ch), |
| ch->fifo_size - ch->write_avail(ch)); |
| ch->notify(ch->priv, SMD_EVENT_DATA); |
| } |
| if (ch_flags & 0x4 && !state_change) { |
| SMx_POWER_INFO("SMD ch%d '%s' State update\n", |
| ch->n, ch->name); |
| ch->notify(ch->priv, SMD_EVENT_STATUS); |
| } |
| } |
| spin_unlock_irqrestore(&smd_lock, flags); |
| do_smd_probe(); |
| } |
| |
| static irqreturn_t smd_modem_irq_handler(int irq, void *data) |
| { |
| SMx_POWER_INFO("SMD Int Modem->Apps\n"); |
| ++interrupt_stats[SMD_MODEM].smd_in_count; |
| handle_smd_irq(&smd_ch_list_modem, notify_modem_smd); |
| handle_smd_irq_closing_list(); |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t smd_dsp_irq_handler(int irq, void *data) |
| { |
| SMx_POWER_INFO("SMD Int LPASS->Apps\n"); |
| ++interrupt_stats[SMD_Q6].smd_in_count; |
| handle_smd_irq(&smd_ch_list_dsp, notify_dsp_smd); |
| handle_smd_irq_closing_list(); |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t smd_dsps_irq_handler(int irq, void *data) |
| { |
| SMx_POWER_INFO("SMD Int DSPS->Apps\n"); |
| ++interrupt_stats[SMD_DSPS].smd_in_count; |
| handle_smd_irq(&smd_ch_list_dsps, notify_dsps_smd); |
| handle_smd_irq_closing_list(); |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t smd_wcnss_irq_handler(int irq, void *data) |
| { |
| SMx_POWER_INFO("SMD Int WCNSS->Apps\n"); |
| ++interrupt_stats[SMD_WCNSS].smd_in_count; |
| handle_smd_irq(&smd_ch_list_wcnss, notify_wcnss_smd); |
| handle_smd_irq_closing_list(); |
| return IRQ_HANDLED; |
| } |
| |
| static void smd_fake_irq_handler(unsigned long arg) |
| { |
| handle_smd_irq(&smd_ch_list_modem, notify_modem_smd); |
| handle_smd_irq(&smd_ch_list_dsp, notify_dsp_smd); |
| handle_smd_irq(&smd_ch_list_dsps, notify_dsps_smd); |
| handle_smd_irq(&smd_ch_list_wcnss, notify_wcnss_smd); |
| handle_smd_irq_closing_list(); |
| } |
| |
| static DECLARE_TASKLET(smd_fake_irq_tasklet, smd_fake_irq_handler, 0); |
| |
| static inline int smd_need_int(struct smd_channel *ch) |
| { |
| if (ch_is_open(ch)) { |
| if (ch->recv->fHEAD || ch->recv->fTAIL || ch->recv->fSTATE) |
| return 1; |
| if (ch->recv->state != ch->last_state) |
| return 1; |
| } |
| return 0; |
| } |
| |
| void smd_sleep_exit(void) |
| { |
| unsigned long flags; |
| struct smd_channel *ch; |
| int need_int = 0; |
| |
| spin_lock_irqsave(&smd_lock, flags); |
| list_for_each_entry(ch, &smd_ch_list_modem, ch_list) { |
| if (smd_need_int(ch)) { |
| need_int = 1; |
| break; |
| } |
| } |
| list_for_each_entry(ch, &smd_ch_list_dsp, ch_list) { |
| if (smd_need_int(ch)) { |
| need_int = 1; |
| break; |
| } |
| } |
| list_for_each_entry(ch, &smd_ch_list_dsps, ch_list) { |
| if (smd_need_int(ch)) { |
| need_int = 1; |
| break; |
| } |
| } |
| list_for_each_entry(ch, &smd_ch_list_wcnss, ch_list) { |
| if (smd_need_int(ch)) { |
| need_int = 1; |
| break; |
| } |
| } |
| spin_unlock_irqrestore(&smd_lock, flags); |
| do_smd_probe(); |
| |
| if (need_int) { |
| SMD_DBG("smd_sleep_exit need interrupt\n"); |
| tasklet_schedule(&smd_fake_irq_tasklet); |
| } |
| } |
| EXPORT_SYMBOL(smd_sleep_exit); |
| |
| static int smd_is_packet(struct smd_alloc_elm *alloc_elm) |
| { |
| if (SMD_XFER_TYPE(alloc_elm->type) == 1) |
| return 0; |
| else if (SMD_XFER_TYPE(alloc_elm->type) == 2) |
| return 1; |
| |
| /* for cases where xfer type is 0 */ |
| if (!strncmp(alloc_elm->name, "DAL", 3)) |
| return 0; |
| |
| /* for cases where xfer type is 0 */ |
| if (!strncmp(alloc_elm->name, "RPCCALL_QDSP", 12)) |
| return 0; |
| |
| if (alloc_elm->cid > 4 || alloc_elm->cid == 1) |
| return 1; |
| else |
| return 0; |
| } |
| |
| static int smd_stream_write(smd_channel_t *ch, const void *_data, int len, |
| int user_buf) |
| { |
| void *ptr; |
| const unsigned char *buf = _data; |
| unsigned xfer; |
| int orig_len = len; |
| int r = 0; |
| |
| SMD_DBG("smd_stream_write() %d -> ch%d\n", len, ch->n); |
| if (len < 0) |
| return -EINVAL; |
| else if (len == 0) |
| return 0; |
| |
| while ((xfer = ch_write_buffer(ch, &ptr)) != 0) { |
| if (!ch_is_open(ch)) { |
| len = orig_len; |
| break; |
| } |
| if (xfer > len) |
| xfer = len; |
| if (user_buf) { |
| r = copy_from_user(ptr, buf, xfer); |
| if (r > 0) { |
| pr_err("%s: " |
| "copy_from_user could not copy %i " |
| "bytes.\n", |
| __func__, |
| r); |
| } |
| } else |
| memcpy(ptr, buf, xfer); |
| ch_write_done(ch, xfer); |
| len -= xfer; |
| buf += xfer; |
| if (len == 0) |
| break; |
| } |
| |
| if (orig_len - len) |
| ch->notify_other_cpu(); |
| |
| return orig_len - len; |
| } |
| |
| static int smd_packet_write(smd_channel_t *ch, const void *_data, int len, |
| int user_buf) |
| { |
| int ret; |
| unsigned hdr[5]; |
| |
| SMD_DBG("smd_packet_write() %d -> ch%d\n", len, ch->n); |
| if (len < 0) |
| return -EINVAL; |
| else if (len == 0) |
| return 0; |
| |
| if (smd_stream_write_avail(ch) < (len + SMD_HEADER_SIZE)) |
| return -ENOMEM; |
| |
| hdr[0] = len; |
| hdr[1] = hdr[2] = hdr[3] = hdr[4] = 0; |
| |
| |
| ret = smd_stream_write(ch, hdr, sizeof(hdr), 0); |
| if (ret < 0 || ret != sizeof(hdr)) { |
| SMD_DBG("%s failed to write pkt header: " |
| "%d returned\n", __func__, ret); |
| return -1; |
| } |
| |
| |
| ret = smd_stream_write(ch, _data, len, user_buf); |
| if (ret < 0 || ret != len) { |
| SMD_DBG("%s failed to write pkt data: " |
| "%d returned\n", __func__, ret); |
| return ret; |
| } |
| |
| return len; |
| } |
| |
| static int smd_stream_read(smd_channel_t *ch, void *data, int len, int user_buf) |
| { |
| int r; |
| |
| if (len < 0) |
| return -EINVAL; |
| |
| r = ch_read(ch, data, len, user_buf); |
| if (r > 0) |
| if (!read_intr_blocked(ch)) |
| ch->notify_other_cpu(); |
| |
| return r; |
| } |
| |
| static int smd_packet_read(smd_channel_t *ch, void *data, int len, int user_buf) |
| { |
| unsigned long flags; |
| int r; |
| |
| if (len < 0) |
| return -EINVAL; |
| |
| if (len > ch->current_packet) |
| len = ch->current_packet; |
| |
| r = ch_read(ch, data, len, user_buf); |
| if (r > 0) |
| if (!read_intr_blocked(ch)) |
| ch->notify_other_cpu(); |
| |
| spin_lock_irqsave(&smd_lock, flags); |
| ch->current_packet -= r; |
| update_packet_state(ch); |
| spin_unlock_irqrestore(&smd_lock, flags); |
| |
| return r; |
| } |
| |
| static int smd_packet_read_from_cb(smd_channel_t *ch, void *data, int len, |
| int user_buf) |
| { |
| int r; |
| |
| if (len < 0) |
| return -EINVAL; |
| |
| if (len > ch->current_packet) |
| len = ch->current_packet; |
| |
| r = ch_read(ch, data, len, user_buf); |
| if (r > 0) |
| if (!read_intr_blocked(ch)) |
| ch->notify_other_cpu(); |
| |
| ch->current_packet -= r; |
| update_packet_state(ch); |
| |
| return r; |
| } |
| |
| #if (defined(CONFIG_MSM_SMD_PKG4) || defined(CONFIG_MSM_SMD_PKG3)) |
| static int smd_alloc_v2(struct smd_channel *ch) |
| { |
| struct smd_shared_v2 *shared2; |
| void *buffer; |
| unsigned buffer_sz; |
| |
| shared2 = smem_alloc(SMEM_SMD_BASE_ID + ch->n, sizeof(*shared2)); |
| if (!shared2) { |
| SMD_INFO("smem_alloc failed ch=%d\n", ch->n); |
| return -EINVAL; |
| } |
| buffer = smem_get_entry(SMEM_SMD_FIFO_BASE_ID + ch->n, &buffer_sz); |
| if (!buffer) { |
| SMD_INFO("smem_get_entry failed\n"); |
| return -EINVAL; |
| } |
| |
| /* buffer must be a power-of-two size */ |
| if (buffer_sz & (buffer_sz - 1)) { |
| SMD_INFO("Buffer size: %u not power of two\n", buffer_sz); |
| return -EINVAL; |
| } |
| buffer_sz /= 2; |
| ch->send = &shared2->ch0; |
| ch->recv = &shared2->ch1; |
| ch->send_data = buffer; |
| ch->recv_data = buffer + buffer_sz; |
| ch->fifo_size = buffer_sz; |
| return 0; |
| } |
| |
| static int smd_alloc_v1(struct smd_channel *ch) |
| { |
| return -EINVAL; |
| } |
| |
| #else /* define v1 for older targets */ |
| static int smd_alloc_v2(struct smd_channel *ch) |
| { |
| return -EINVAL; |
| } |
| |
| static int smd_alloc_v1(struct smd_channel *ch) |
| { |
| struct smd_shared_v1 *shared1; |
| shared1 = smem_alloc(ID_SMD_CHANNELS + ch->n, sizeof(*shared1)); |
| if (!shared1) { |
| pr_err("smd_alloc_channel() cid %d does not exist\n", ch->n); |
| return -EINVAL; |
| } |
| ch->send = &shared1->ch0; |
| ch->recv = &shared1->ch1; |
| ch->send_data = shared1->data0; |
| ch->recv_data = shared1->data1; |
| ch->fifo_size = SMD_BUF_SIZE; |
| return 0; |
| } |
| |
| #endif |
| |
| static int smd_alloc_channel(struct smd_alloc_elm *alloc_elm) |
| { |
| struct smd_channel *ch; |
| |
| ch = kzalloc(sizeof(struct smd_channel), GFP_KERNEL); |
| if (ch == 0) { |
| pr_err("smd_alloc_channel() out of memory\n"); |
| return -1; |
| } |
| ch->n = alloc_elm->cid; |
| |
| if (smd_alloc_v2(ch) && smd_alloc_v1(ch)) { |
| kfree(ch); |
| return -1; |
| } |
| |
| ch->fifo_mask = ch->fifo_size - 1; |
| ch->type = SMD_CHANNEL_TYPE(alloc_elm->type); |
| |
| if (ch->type == SMD_APPS_MODEM) |
| ch->notify_other_cpu = notify_modem_smd; |
| else if (ch->type == SMD_APPS_QDSP) |
| ch->notify_other_cpu = notify_dsp_smd; |
| else if (ch->type == SMD_APPS_DSPS) |
| ch->notify_other_cpu = notify_dsps_smd; |
| else |
| ch->notify_other_cpu = notify_wcnss_smd; |
| |
| if (smd_is_packet(alloc_elm)) { |
| ch->read = smd_packet_read; |
| ch->write = smd_packet_write; |
| ch->read_avail = smd_packet_read_avail; |
| ch->write_avail = smd_packet_write_avail; |
| ch->update_state = update_packet_state; |
| ch->read_from_cb = smd_packet_read_from_cb; |
| ch->is_pkt_ch = 1; |
| } else { |
| ch->read = smd_stream_read; |
| ch->write = smd_stream_write; |
| ch->read_avail = smd_stream_read_avail; |
| ch->write_avail = smd_stream_write_avail; |
| ch->update_state = update_stream_state; |
| ch->read_from_cb = smd_stream_read; |
| } |
| |
| memcpy(ch->name, alloc_elm->name, SMD_MAX_CH_NAME_LEN); |
| ch->name[SMD_MAX_CH_NAME_LEN-1] = 0; |
| |
| ch->pdev.name = ch->name; |
| ch->pdev.id = ch->type; |
| |
| SMD_INFO("smd_alloc_channel() '%s' cid=%d\n", |
| ch->name, ch->n); |
| |
| mutex_lock(&smd_creation_mutex); |
| list_add(&ch->ch_list, &smd_ch_closed_list); |
| mutex_unlock(&smd_creation_mutex); |
| |
| platform_device_register(&ch->pdev); |
| if (!strncmp(ch->name, "LOOPBACK", 8) && ch->type == SMD_APPS_MODEM) { |
| /* create a platform driver to be used by smd_tty driver |
| * so that it can access the loopback port |
| */ |
| loopback_tty_pdev.id = ch->type; |
| platform_device_register(&loopback_tty_pdev); |
| } |
| return 0; |
| } |
| |
| static inline void notify_loopback_smd(void) |
| { |
| unsigned long flags; |
| struct smd_channel *ch; |
| |
| spin_lock_irqsave(&smd_lock, flags); |
| list_for_each_entry(ch, &smd_ch_list_loopback, ch_list) { |
| ch->notify(ch->priv, SMD_EVENT_DATA); |
| } |
| spin_unlock_irqrestore(&smd_lock, flags); |
| } |
| |
| static int smd_alloc_loopback_channel(void) |
| { |
| static struct smd_half_channel smd_loopback_ctl; |
| static char smd_loopback_data[SMD_BUF_SIZE]; |
| struct smd_channel *ch; |
| |
| ch = kzalloc(sizeof(struct smd_channel), GFP_KERNEL); |
| if (ch == 0) { |
| pr_err("%s: out of memory\n", __func__); |
| return -1; |
| } |
| ch->n = SMD_LOOPBACK_CID; |
| |
| ch->send = &smd_loopback_ctl; |
| ch->recv = &smd_loopback_ctl; |
| ch->send_data = smd_loopback_data; |
| ch->recv_data = smd_loopback_data; |
| ch->fifo_size = SMD_BUF_SIZE; |
| |
| ch->fifo_mask = ch->fifo_size - 1; |
| ch->type = SMD_LOOPBACK_TYPE; |
| ch->notify_other_cpu = notify_loopback_smd; |
| |
| ch->read = smd_stream_read; |
| ch->write = smd_stream_write; |
| ch->read_avail = smd_stream_read_avail; |
| ch->write_avail = smd_stream_write_avail; |
| ch->update_state = update_stream_state; |
| ch->read_from_cb = smd_stream_read; |
| |
| memset(ch->name, 0, 20); |
| memcpy(ch->name, "local_loopback", 14); |
| |
| ch->pdev.name = ch->name; |
| ch->pdev.id = ch->type; |
| |
| SMD_INFO("%s: '%s' cid=%d\n", __func__, ch->name, ch->n); |
| |
| mutex_lock(&smd_creation_mutex); |
| list_add(&ch->ch_list, &smd_ch_closed_list); |
| mutex_unlock(&smd_creation_mutex); |
| |
| platform_device_register(&ch->pdev); |
| return 0; |
| } |
| |
| static void do_nothing_notify(void *priv, unsigned flags) |
| { |
| } |
| |
| static void finalize_channel_close_fn(struct work_struct *work) |
| { |
| unsigned long flags; |
| struct smd_channel *ch; |
| struct smd_channel *index; |
| |
| mutex_lock(&smd_creation_mutex); |
| spin_lock_irqsave(&smd_lock, flags); |
| list_for_each_entry_safe(ch, index, &smd_ch_to_close_list, ch_list) { |
| list_del(&ch->ch_list); |
| list_add(&ch->ch_list, &smd_ch_closed_list); |
| ch->notify(ch->priv, SMD_EVENT_REOPEN_READY); |
| ch->notify = do_nothing_notify; |
| } |
| spin_unlock_irqrestore(&smd_lock, flags); |
| mutex_unlock(&smd_creation_mutex); |
| } |
| |
| struct smd_channel *smd_get_channel(const char *name, uint32_t type) |
| { |
| struct smd_channel *ch; |
| |
| mutex_lock(&smd_creation_mutex); |
| list_for_each_entry(ch, &smd_ch_closed_list, ch_list) { |
| if (!strcmp(name, ch->name) && |
| (type == ch->type)) { |
| list_del(&ch->ch_list); |
| mutex_unlock(&smd_creation_mutex); |
| return ch; |
| } |
| } |
| mutex_unlock(&smd_creation_mutex); |
| |
| return NULL; |
| } |
| |
| int smd_named_open_on_edge(const char *name, uint32_t edge, |
| smd_channel_t **_ch, |
| void *priv, void (*notify)(void *, unsigned)) |
| { |
| struct smd_channel *ch; |
| unsigned long flags; |
| |
| if (smd_initialized == 0) { |
| SMD_INFO("smd_open() before smd_init()\n"); |
| return -ENODEV; |
| } |
| |
| SMD_DBG("smd_open('%s', %p, %p)\n", name, priv, notify); |
| |
| ch = smd_get_channel(name, edge); |
| if (!ch) { |
| /* check closing list for port */ |
| spin_lock_irqsave(&smd_lock, flags); |
| list_for_each_entry(ch, &smd_ch_closing_list, ch_list) { |
| if (!strncmp(name, ch->name, 20) && |
| (edge == ch->type)) { |
| /* channel exists, but is being closed */ |
| spin_unlock_irqrestore(&smd_lock, flags); |
| return -EAGAIN; |
| } |
| } |
| |
| /* check closing workqueue list for port */ |
| list_for_each_entry(ch, &smd_ch_to_close_list, ch_list) { |
| if (!strncmp(name, ch->name, 20) && |
| (edge == ch->type)) { |
| /* channel exists, but is being closed */ |
| spin_unlock_irqrestore(&smd_lock, flags); |
| return -EAGAIN; |
| } |
| } |
| spin_unlock_irqrestore(&smd_lock, flags); |
| |
| /* one final check to handle closing->closed race condition */ |
| ch = smd_get_channel(name, edge); |
| if (!ch) |
| return -ENODEV; |
| } |
| |
| if (notify == 0) |
| notify = do_nothing_notify; |
| |
| ch->notify = notify; |
| ch->current_packet = 0; |
| ch->last_state = SMD_SS_CLOSED; |
| ch->priv = priv; |
| |
| if (edge == SMD_LOOPBACK_TYPE) { |
| ch->last_state = SMD_SS_OPENED; |
| ch->send->state = SMD_SS_OPENED; |
| ch->send->fDSR = 1; |
| ch->send->fCTS = 1; |
| ch->send->fCD = 1; |
| } |
| |
| *_ch = ch; |
| |
| SMD_DBG("smd_open: opening '%s'\n", ch->name); |
| |
| spin_lock_irqsave(&smd_lock, flags); |
| if (SMD_CHANNEL_TYPE(ch->type) == SMD_APPS_MODEM) |
| list_add(&ch->ch_list, &smd_ch_list_modem); |
| else if (SMD_CHANNEL_TYPE(ch->type) == SMD_APPS_QDSP) |
| list_add(&ch->ch_list, &smd_ch_list_dsp); |
| else if (SMD_CHANNEL_TYPE(ch->type) == SMD_APPS_DSPS) |
| list_add(&ch->ch_list, &smd_ch_list_dsps); |
| else if (SMD_CHANNEL_TYPE(ch->type) == SMD_APPS_WCNSS) |
| list_add(&ch->ch_list, &smd_ch_list_wcnss); |
| else |
| list_add(&ch->ch_list, &smd_ch_list_loopback); |
| |
| SMD_DBG("%s: opening ch %d\n", __func__, ch->n); |
| |
| if (edge != SMD_LOOPBACK_TYPE) |
| smd_state_change(ch, ch->last_state, SMD_SS_OPENING); |
| |
| spin_unlock_irqrestore(&smd_lock, flags); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(smd_named_open_on_edge); |
| |
| |
| int smd_open(const char *name, smd_channel_t **_ch, |
| void *priv, void (*notify)(void *, unsigned)) |
| { |
| return smd_named_open_on_edge(name, SMD_APPS_MODEM, _ch, priv, |
| notify); |
| } |
| EXPORT_SYMBOL(smd_open); |
| |
| int smd_close(smd_channel_t *ch) |
| { |
| unsigned long flags; |
| |
| if (ch == 0) |
| return -1; |
| |
| SMD_INFO("smd_close(%s)\n", ch->name); |
| |
| spin_lock_irqsave(&smd_lock, flags); |
| list_del(&ch->ch_list); |
| if (ch->n == SMD_LOOPBACK_CID) { |
| ch->send->fDSR = 0; |
| ch->send->fCTS = 0; |
| ch->send->fCD = 0; |
| ch->send->state = SMD_SS_CLOSED; |
| } else |
| ch_set_state(ch, SMD_SS_CLOSED); |
| |
| if (ch->recv->state == SMD_SS_OPENED) { |
| list_add(&ch->ch_list, &smd_ch_closing_list); |
| spin_unlock_irqrestore(&smd_lock, flags); |
| } else { |
| spin_unlock_irqrestore(&smd_lock, flags); |
| ch->notify = do_nothing_notify; |
| mutex_lock(&smd_creation_mutex); |
| list_add(&ch->ch_list, &smd_ch_closed_list); |
| mutex_unlock(&smd_creation_mutex); |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(smd_close); |
| |
| int smd_write_start(smd_channel_t *ch, int len) |
| { |
| int ret; |
| unsigned hdr[5]; |
| |
| if (!ch) { |
| pr_err("%s: Invalid channel specified\n", __func__); |
| return -ENODEV; |
| } |
| if (!ch->is_pkt_ch) { |
| pr_err("%s: non-packet channel specified\n", __func__); |
| return -EACCES; |
| } |
| if (len < 1) { |
| pr_err("%s: invalid length: %d\n", __func__, len); |
| return -EINVAL; |
| } |
| |
| if (ch->pending_pkt_sz) { |
| pr_err("%s: packet of size: %d in progress\n", __func__, |
| ch->pending_pkt_sz); |
| return -EBUSY; |
| } |
| ch->pending_pkt_sz = len; |
| |
| if (smd_stream_write_avail(ch) < (SMD_HEADER_SIZE)) { |
| ch->pending_pkt_sz = 0; |
| SMD_DBG("%s: no space to write packet header\n", __func__); |
| return -EAGAIN; |
| } |
| |
| hdr[0] = len; |
| hdr[1] = hdr[2] = hdr[3] = hdr[4] = 0; |
| |
| |
| ret = smd_stream_write(ch, hdr, sizeof(hdr), 0); |
| if (ret < 0 || ret != sizeof(hdr)) { |
| ch->pending_pkt_sz = 0; |
| pr_err("%s: packet header failed to write\n", __func__); |
| return -EPERM; |
| } |
| return 0; |
| } |
| EXPORT_SYMBOL(smd_write_start); |
| |
| int smd_write_segment(smd_channel_t *ch, void *data, int len, int user_buf) |
| { |
| int bytes_written; |
| |
| if (!ch) { |
| pr_err("%s: Invalid channel specified\n", __func__); |
| return -ENODEV; |
| } |
| if (len < 1) { |
| pr_err("%s: invalid length: %d\n", __func__, len); |
| return -EINVAL; |
| } |
| |
| if (!ch->pending_pkt_sz) { |
| pr_err("%s: no transaction in progress\n", __func__); |
| return -ENOEXEC; |
| } |
| if (ch->pending_pkt_sz - len < 0) { |
| pr_err("%s: segment of size: %d will make packet go over " |
| "length\n", __func__, len); |
| return -EINVAL; |
| } |
| |
| bytes_written = smd_stream_write(ch, data, len, user_buf); |
| |
| ch->pending_pkt_sz -= bytes_written; |
| |
| return bytes_written; |
| } |
| EXPORT_SYMBOL(smd_write_segment); |
| |
| int smd_write_end(smd_channel_t *ch) |
| { |
| |
| if (!ch) { |
| pr_err("%s: Invalid channel specified\n", __func__); |
| return -ENODEV; |
| } |
| if (ch->pending_pkt_sz) { |
| pr_err("%s: current packet not completely written\n", __func__); |
| return -E2BIG; |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(smd_write_end); |
| |
| int smd_read(smd_channel_t *ch, void *data, int len) |
| { |
| if (!ch) { |
| pr_err("%s: Invalid channel specified\n", __func__); |
| return -ENODEV; |
| } |
| |
| return ch->read(ch, data, len, 0); |
| } |
| EXPORT_SYMBOL(smd_read); |
| |
| int smd_read_user_buffer(smd_channel_t *ch, void *data, int len) |
| { |
| if (!ch) { |
| pr_err("%s: Invalid channel specified\n", __func__); |
| return -ENODEV; |
| } |
| |
| return ch->read(ch, data, len, 1); |
| } |
| EXPORT_SYMBOL(smd_read_user_buffer); |
| |
| int smd_read_from_cb(smd_channel_t *ch, void *data, int len) |
| { |
| if (!ch) { |
| pr_err("%s: Invalid channel specified\n", __func__); |
| return -ENODEV; |
| } |
| |
| return ch->read_from_cb(ch, data, len, 0); |
| } |
| EXPORT_SYMBOL(smd_read_from_cb); |
| |
| int smd_write(smd_channel_t *ch, const void *data, int len) |
| { |
| if (!ch) { |
| pr_err("%s: Invalid channel specified\n", __func__); |
| return -ENODEV; |
| } |
| |
| return ch->pending_pkt_sz ? -EBUSY : ch->write(ch, data, len, 0); |
| } |
| EXPORT_SYMBOL(smd_write); |
| |
| int smd_write_user_buffer(smd_channel_t *ch, const void *data, int len) |
| { |
| if (!ch) { |
| pr_err("%s: Invalid channel specified\n", __func__); |
| return -ENODEV; |
| } |
| |
| return ch->pending_pkt_sz ? -EBUSY : ch->write(ch, data, len, 1); |
| } |
| EXPORT_SYMBOL(smd_write_user_buffer); |
| |
| int smd_read_avail(smd_channel_t *ch) |
| { |
| if (!ch) { |
| pr_err("%s: Invalid channel specified\n", __func__); |
| return -ENODEV; |
| } |
| |
| return ch->read_avail(ch); |
| } |
| EXPORT_SYMBOL(smd_read_avail); |
| |
| int smd_write_avail(smd_channel_t *ch) |
| { |
| if (!ch) { |
| pr_err("%s: Invalid channel specified\n", __func__); |
| return -ENODEV; |
| } |
| |
| return ch->write_avail(ch); |
| } |
| EXPORT_SYMBOL(smd_write_avail); |
| |
| void smd_enable_read_intr(smd_channel_t *ch) |
| { |
| if (ch) |
| ch->send->fBLOCKREADINTR = 0; |
| } |
| EXPORT_SYMBOL(smd_enable_read_intr); |
| |
| void smd_disable_read_intr(smd_channel_t *ch) |
| { |
| if (ch) |
| ch->send->fBLOCKREADINTR = 1; |
| } |
| EXPORT_SYMBOL(smd_disable_read_intr); |
| |
| int smd_wait_until_readable(smd_channel_t *ch, int bytes) |
| { |
| return -1; |
| } |
| |
| int smd_wait_until_writable(smd_channel_t *ch, int bytes) |
| { |
| return -1; |
| } |
| |
| int smd_cur_packet_size(smd_channel_t *ch) |
| { |
| if (!ch) { |
| pr_err("%s: Invalid channel specified\n", __func__); |
| return -ENODEV; |
| } |
| |
| return ch->current_packet; |
| } |
| EXPORT_SYMBOL(smd_cur_packet_size); |
| |
| int smd_tiocmget(smd_channel_t *ch) |
| { |
| if (!ch) { |
| pr_err("%s: Invalid channel specified\n", __func__); |
| return -ENODEV; |
| } |
| |
| return (ch->recv->fDSR ? TIOCM_DSR : 0) | |
| (ch->recv->fCTS ? TIOCM_CTS : 0) | |
| (ch->recv->fCD ? TIOCM_CD : 0) | |
| (ch->recv->fRI ? TIOCM_RI : 0) | |
| (ch->send->fCTS ? TIOCM_RTS : 0) | |
| (ch->send->fDSR ? TIOCM_DTR : 0); |
| } |
| EXPORT_SYMBOL(smd_tiocmget); |
| |
| /* this api will be called while holding smd_lock */ |
| int |
| smd_tiocmset_from_cb(smd_channel_t *ch, unsigned int set, unsigned int clear) |
| { |
| if (!ch) { |
| pr_err("%s: Invalid channel specified\n", __func__); |
| return -ENODEV; |
| } |
| |
| if (set & TIOCM_DTR) |
| ch->send->fDSR = 1; |
| |
| if (set & TIOCM_RTS) |
| ch->send->fCTS = 1; |
| |
| if (clear & TIOCM_DTR) |
| ch->send->fDSR = 0; |
| |
| if (clear & TIOCM_RTS) |
| ch->send->fCTS = 0; |
| |
| ch->send->fSTATE = 1; |
| barrier(); |
| ch->notify_other_cpu(); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(smd_tiocmset_from_cb); |
| |
| int smd_tiocmset(smd_channel_t *ch, unsigned int set, unsigned int clear) |
| { |
| unsigned long flags; |
| |
| if (!ch) { |
| pr_err("%s: Invalid channel specified\n", __func__); |
| return -ENODEV; |
| } |
| |
| spin_lock_irqsave(&smd_lock, flags); |
| smd_tiocmset_from_cb(ch, set, clear); |
| spin_unlock_irqrestore(&smd_lock, flags); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(smd_tiocmset); |
| |
| |
| /* -------------------------------------------------------------------------- */ |
| |
| /* smem_alloc returns the pointer to smem item if it is already allocated. |
| * Otherwise, it returns NULL. |
| */ |
| void *smem_alloc(unsigned id, unsigned size) |
| { |
| return smem_find(id, size); |
| } |
| EXPORT_SYMBOL(smem_alloc); |
| |
| /* smem_alloc2 returns the pointer to smem item. If it is not allocated, |
| * it allocates it and then returns the pointer to it. |
| */ |
| void *smem_alloc2(unsigned id, unsigned size_in) |
| { |
| struct smem_shared *shared = (void *) MSM_SHARED_RAM_BASE; |
| struct smem_heap_entry *toc = shared->heap_toc; |
| unsigned long flags; |
| void *ret = NULL; |
| |
| if (!shared->heap_info.initialized) { |
| pr_err("%s: smem heap info not initialized\n", __func__); |
| return NULL; |
| } |
| |
| if (id >= SMEM_NUM_ITEMS) |
| return NULL; |
| |
| size_in = ALIGN(size_in, 8); |
| remote_spin_lock_irqsave(&remote_spinlock, flags); |
| if (toc[id].allocated) { |
| SMD_DBG("%s: %u already allocated\n", __func__, id); |
| if (size_in != toc[id].size) |
| pr_err("%s: wrong size %u (expected %u)\n", |
| __func__, toc[id].size, size_in); |
| else |
| ret = (void *)(MSM_SHARED_RAM_BASE + toc[id].offset); |
| } else if (id > SMEM_FIXED_ITEM_LAST) { |
| SMD_DBG("%s: allocating %u\n", __func__, id); |
| if (shared->heap_info.heap_remaining >= size_in) { |
| toc[id].offset = shared->heap_info.free_offset; |
| toc[id].size = size_in; |
| wmb(); |
| toc[id].allocated = 1; |
| |
| shared->heap_info.free_offset += size_in; |
| shared->heap_info.heap_remaining -= size_in; |
| ret = (void *)(MSM_SHARED_RAM_BASE + toc[id].offset); |
| } else |
| pr_err("%s: not enough memory %u (required %u)\n", |
| __func__, shared->heap_info.heap_remaining, |
| size_in); |
| } |
| wmb(); |
| remote_spin_unlock_irqrestore(&remote_spinlock, flags); |
| return ret; |
| } |
| EXPORT_SYMBOL(smem_alloc2); |
| |
| void *smem_get_entry(unsigned id, unsigned *size) |
| { |
| struct smem_shared *shared = (void *) MSM_SHARED_RAM_BASE; |
| struct smem_heap_entry *toc = shared->heap_toc; |
| int use_spinlocks = spinlocks_initialized; |
| void *ret = 0; |
| unsigned long flags = 0; |
| |
| if (id >= SMEM_NUM_ITEMS) |
| return ret; |
| |
| if (use_spinlocks) |
| remote_spin_lock_irqsave(&remote_spinlock, flags); |
| /* toc is in device memory and cannot be speculatively accessed */ |
| if (toc[id].allocated) { |
| *size = toc[id].size; |
| barrier(); |
| ret = (void *) (MSM_SHARED_RAM_BASE + toc[id].offset); |
| } else { |
| *size = 0; |
| } |
| if (use_spinlocks) |
| remote_spin_unlock_irqrestore(&remote_spinlock, flags); |
| |
| return ret; |
| } |
| EXPORT_SYMBOL(smem_get_entry); |
| |
| void *smem_find(unsigned id, unsigned size_in) |
| { |
| unsigned size; |
| void *ptr; |
| |
| ptr = smem_get_entry(id, &size); |
| if (!ptr) |
| return 0; |
| |
| size_in = ALIGN(size_in, 8); |
| if (size_in != size) { |
| pr_err("smem_find(%d, %d): wrong size %d\n", |
| id, size_in, size); |
| return 0; |
| } |
| |
| return ptr; |
| } |
| EXPORT_SYMBOL(smem_find); |
| |
| static int smsm_cb_init(void) |
| { |
| struct smsm_state_info *state_info; |
| int n; |
| int ret = 0; |
| |
| smsm_states = kmalloc(sizeof(struct smsm_state_info)*SMSM_NUM_ENTRIES, |
| GFP_KERNEL); |
| |
| if (!smsm_states) { |
| pr_err("%s: SMSM init failed\n", __func__); |
| return -ENOMEM; |
| } |
| |
| mutex_lock(&smsm_lock); |
| for (n = 0; n < SMSM_NUM_ENTRIES; n++) { |
| state_info = &smsm_states[n]; |
| state_info->last_value = __raw_readl(SMSM_STATE_ADDR(n)); |
| INIT_LIST_HEAD(&state_info->callbacks); |
| } |
| mutex_unlock(&smsm_lock); |
| |
| return ret; |
| } |
| |
| static int smsm_init(void) |
| { |
| struct smem_shared *shared = (void *) MSM_SHARED_RAM_BASE; |
| int i; |
| struct smsm_size_info_type *smsm_size_info; |
| |
| i = remote_spin_lock_init(&remote_spinlock, SMEM_SPINLOCK_SMEM_ALLOC); |
| if (i) { |
| pr_err("%s: remote spinlock init failed %d\n", __func__, i); |
| return i; |
| } |
| spinlocks_initialized = 1; |
| |
| smsm_size_info = smem_alloc(SMEM_SMSM_SIZE_INFO, |
| sizeof(struct smsm_size_info_type)); |
| if (smsm_size_info) { |
| SMSM_NUM_ENTRIES = smsm_size_info->num_entries; |
| SMSM_NUM_HOSTS = smsm_size_info->num_hosts; |
| } |
| |
| i = kfifo_alloc(&smsm_snapshot_fifo, |
| sizeof(uint32_t) * SMSM_NUM_ENTRIES * SMSM_SNAPSHOT_CNT, |
| GFP_KERNEL); |
| if (i) { |
| pr_err("%s: SMSM state fifo alloc failed %d\n", __func__, i); |
| return i; |
| } |
| wake_lock_init(&smsm_snapshot_wakelock, WAKE_LOCK_SUSPEND, |
| "smsm_snapshot"); |
| |
| if (!smsm_info.state) { |
| smsm_info.state = smem_alloc2(ID_SHARED_STATE, |
| SMSM_NUM_ENTRIES * |
| sizeof(uint32_t)); |
| |
| if (smsm_info.state) { |
| __raw_writel(0, SMSM_STATE_ADDR(SMSM_APPS_STATE)); |
| if ((shared->version[VERSION_MODEM] >> 16) >= 0xB) |
| __raw_writel(0, \ |
| SMSM_STATE_ADDR(SMSM_APPS_DEM_I)); |
| } |
| } |
| |
| if (!smsm_info.intr_mask) { |
| smsm_info.intr_mask = smem_alloc2(SMEM_SMSM_CPU_INTR_MASK, |
| SMSM_NUM_ENTRIES * |
| SMSM_NUM_HOSTS * |
| sizeof(uint32_t)); |
| |
| if (smsm_info.intr_mask) |
| for (i = 0; i < SMSM_NUM_ENTRIES; i++) |
| __raw_writel(0xffffffff, |
| SMSM_INTR_MASK_ADDR(i, SMSM_APPS)); |
| } |
| |
| if (!smsm_info.intr_mux) |
| smsm_info.intr_mux = smem_alloc2(SMEM_SMD_SMSM_INTR_MUX, |
| SMSM_NUM_INTR_MUX * |
| sizeof(uint32_t)); |
| |
| i = smsm_cb_init(); |
| if (i) |
| return i; |
| |
| wmb(); |
| smsm_driver_state_notify(SMSM_INIT, NULL); |
| return 0; |
| } |
| |
| void smsm_reset_modem(unsigned mode) |
| { |
| if (mode == SMSM_SYSTEM_DOWNLOAD) { |
| mode = SMSM_RESET | SMSM_SYSTEM_DOWNLOAD; |
| } else if (mode == SMSM_MODEM_WAIT) { |
| mode = SMSM_RESET | SMSM_MODEM_WAIT; |
| } else { /* reset_mode is SMSM_RESET or default */ |
| mode = SMSM_RESET; |
| } |
| |
| smsm_change_state(SMSM_APPS_STATE, mode, mode); |
| } |
| EXPORT_SYMBOL(smsm_reset_modem); |
| |
| void smsm_reset_modem_cont(void) |
| { |
| unsigned long flags; |
| uint32_t state; |
| |
| if (!smsm_info.state) |
| return; |
| |
| spin_lock_irqsave(&smem_lock, flags); |
| state = __raw_readl(SMSM_STATE_ADDR(SMSM_APPS_STATE)) \ |
| & ~SMSM_MODEM_WAIT; |
| __raw_writel(state, SMSM_STATE_ADDR(SMSM_APPS_STATE)); |
| wmb(); |
| spin_unlock_irqrestore(&smem_lock, flags); |
| } |
| EXPORT_SYMBOL(smsm_reset_modem_cont); |
| |
| static void smsm_cb_snapshot(void) |
| { |
| int n; |
| uint32_t new_state; |
| unsigned long flags; |
| int ret; |
| |
| ret = kfifo_avail(&smsm_snapshot_fifo); |
| if (ret < (SMSM_NUM_ENTRIES * 4)) { |
| pr_err("%s: SMSM snapshot full %d\n", __func__, ret); |
| return; |
| } |
| |
| for (n = 0; n < SMSM_NUM_ENTRIES; n++) { |
| new_state = __raw_readl(SMSM_STATE_ADDR(n)); |
| |
| ret = kfifo_in(&smsm_snapshot_fifo, |
| &new_state, sizeof(new_state)); |
| if (ret != sizeof(new_state)) { |
| pr_err("%s: SMSM snapshot failure %d\n", __func__, ret); |
| return; |
| } |
| } |
| |
| spin_lock_irqsave(&smsm_snapshot_count_lock, flags); |
| if (smsm_snapshot_count == 0) { |
| SMx_POWER_INFO("SMSM snapshot wake lock\n"); |
| wake_lock(&smsm_snapshot_wakelock); |
| } |
| ++smsm_snapshot_count; |
| spin_unlock_irqrestore(&smsm_snapshot_count_lock, flags); |
| schedule_work(&smsm_cb_work); |
| } |
| |
| static irqreturn_t smsm_irq_handler(int irq, void *data) |
| { |
| unsigned long flags; |
| |
| if (irq == INT_ADSP_A11_SMSM) { |
| uint32_t mux_val; |
| static uint32_t prev_smem_q6_apps_smsm; |
| |
| if (smsm_info.intr_mux && cpu_is_qsd8x50()) { |
| mux_val = __raw_readl( |
| SMSM_INTR_MUX_ADDR(SMEM_Q6_APPS_SMSM)); |
| if (mux_val != prev_smem_q6_apps_smsm) |
| prev_smem_q6_apps_smsm = mux_val; |
| } |
| |
| spin_lock_irqsave(&smem_lock, flags); |
| smsm_cb_snapshot(); |
| spin_unlock_irqrestore(&smem_lock, flags); |
| return IRQ_HANDLED; |
| } |
| |
| spin_lock_irqsave(&smem_lock, flags); |
| if (!smsm_info.state) { |
| SMSM_INFO("<SM NO STATE>\n"); |
| } else { |
| unsigned old_apps, apps; |
| unsigned modm = __raw_readl(SMSM_STATE_ADDR(SMSM_MODEM_STATE)); |
| |
| old_apps = apps = __raw_readl(SMSM_STATE_ADDR(SMSM_APPS_STATE)); |
| |
| SMSM_DBG("<SM %08x %08x>\n", apps, modm); |
| if (apps & SMSM_RESET) { |
| /* If we get an interrupt and the apps SMSM_RESET |
| bit is already set, the modem is acking the |
| app's reset ack. */ |
| if (!disable_smsm_reset_handshake) |
| apps &= ~SMSM_RESET; |
| /* Issue a fake irq to handle any |
| * smd state changes during reset |
| */ |
| smd_fake_irq_handler(0); |
| |
| /* queue modem restart notify chain */ |
| modem_queue_start_reset_notify(); |
| |
| } else if (modm & SMSM_RESET) { |
| if (!disable_smsm_reset_handshake) |
| apps |= SMSM_RESET; |
| |
| pr_err("\nSMSM: Modem SMSM state changed to SMSM_RESET."); |
| modem_queue_start_reset_notify(); |
| |
| } else if (modm & SMSM_INIT) { |
| if (!(apps & SMSM_INIT)) { |
| apps |= SMSM_INIT; |
| modem_queue_smsm_init_notify(); |
| } |
| |
| if (modm & SMSM_SMDINIT) |
| apps |= SMSM_SMDINIT; |
| if ((apps & (SMSM_INIT | SMSM_SMDINIT | SMSM_RPCINIT)) == |
| (SMSM_INIT | SMSM_SMDINIT | SMSM_RPCINIT)) |
| apps |= SMSM_RUN; |
| } else if (modm & SMSM_SYSTEM_DOWNLOAD) { |
| pr_err("\nSMSM: Modem SMSM state changed to SMSM_SYSTEM_DOWNLOAD."); |
| modem_queue_start_reset_notify(); |
| } |
| |
| if (old_apps != apps) { |
| SMSM_DBG("<SM %08x NOTIFY>\n", apps); |
| __raw_writel(apps, SMSM_STATE_ADDR(SMSM_APPS_STATE)); |
| do_smd_probe(); |
| notify_other_smsm(SMSM_APPS_STATE, (old_apps ^ apps)); |
| } |
| |
| smsm_cb_snapshot(); |
| } |
| spin_unlock_irqrestore(&smem_lock, flags); |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t smsm_modem_irq_handler(int irq, void *data) |
| { |
| SMx_POWER_INFO("SMSM Int Modem->Apps\n"); |
| ++interrupt_stats[SMD_MODEM].smsm_in_count; |
| return smsm_irq_handler(irq, data); |
| } |
| |
| static irqreturn_t smsm_dsp_irq_handler(int irq, void *data) |
| { |
| SMx_POWER_INFO("SMSM Int LPASS->Apps\n"); |
| ++interrupt_stats[SMD_Q6].smsm_in_count; |
| return smsm_irq_handler(irq, data); |
| } |
| |
| static irqreturn_t smsm_dsps_irq_handler(int irq, void *data) |
| { |
| SMx_POWER_INFO("SMSM Int DSPS->Apps\n"); |
| ++interrupt_stats[SMD_DSPS].smsm_in_count; |
| return smsm_irq_handler(irq, data); |
| } |
| |
| static irqreturn_t smsm_wcnss_irq_handler(int irq, void *data) |
| { |
| SMx_POWER_INFO("SMSM Int WCNSS->Apps\n"); |
| ++interrupt_stats[SMD_WCNSS].smsm_in_count; |
| return smsm_irq_handler(irq, data); |
| } |
| |
| int smsm_change_intr_mask(uint32_t smsm_entry, |
| uint32_t clear_mask, uint32_t set_mask) |
| { |
| uint32_t old_mask, new_mask; |
| unsigned long flags; |
| |
| if (smsm_entry >= SMSM_NUM_ENTRIES) { |
| pr_err("smsm_change_state: Invalid entry %d\n", |
| smsm_entry); |
| return -EINVAL; |
| } |
| |
| if (!smsm_info.intr_mask) { |
| pr_err("smsm_change_intr_mask <SM NO STATE>\n"); |
| return -EIO; |
| } |
| |
| spin_lock_irqsave(&smem_lock, flags); |
| |
| old_mask = __raw_readl(SMSM_INTR_MASK_ADDR(smsm_entry, SMSM_APPS)); |
| new_mask = (old_mask & ~clear_mask) | set_mask; |
| __raw_writel(new_mask, SMSM_INTR_MASK_ADDR(smsm_entry, SMSM_APPS)); |
| |
| wmb(); |
| spin_unlock_irqrestore(&smem_lock, flags); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(smsm_change_intr_mask); |
| |
| int smsm_get_intr_mask(uint32_t smsm_entry, uint32_t *intr_mask) |
| { |
| if (smsm_entry >= SMSM_NUM_ENTRIES) { |
| pr_err("smsm_change_state: Invalid entry %d\n", |
| smsm_entry); |
| return -EINVAL; |
| } |
| |
| if (!smsm_info.intr_mask) { |
| pr_err("smsm_change_intr_mask <SM NO STATE>\n"); |
| return -EIO; |
| } |
| |
| *intr_mask = __raw_readl(SMSM_INTR_MASK_ADDR(smsm_entry, SMSM_APPS)); |
| return 0; |
| } |
| EXPORT_SYMBOL(smsm_get_intr_mask); |
| |
| int smsm_change_state(uint32_t smsm_entry, |
| uint32_t clear_mask, uint32_t set_mask) |
| { |
| unsigned long flags; |
| uint32_t old_state, new_state; |
| |
| if (smsm_entry >= SMSM_NUM_ENTRIES) { |
| pr_err("smsm_change_state: Invalid entry %d", |
| smsm_entry); |
| return -EINVAL; |
| } |
| |
| if (!smsm_info.state) { |
| pr_err("smsm_change_state <SM NO STATE>\n"); |
| return -EIO; |
| } |
| spin_lock_irqsave(&smem_lock, flags); |
| |
| old_state = __raw_readl(SMSM_STATE_ADDR(smsm_entry)); |
| new_state = (old_state & ~clear_mask) | set_mask; |
| __raw_writel(new_state, SMSM_STATE_ADDR(smsm_entry)); |
| SMSM_DBG("smsm_change_state %x\n", new_state); |
| notify_other_smsm(SMSM_APPS_STATE, (old_state ^ new_state)); |
| |
| spin_unlock_irqrestore(&smem_lock, flags); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(smsm_change_state); |
| |
| uint32_t smsm_get_state(uint32_t smsm_entry) |
| { |
| uint32_t rv = 0; |
| |
| /* needs interface change to return error code */ |
| if (smsm_entry >= SMSM_NUM_ENTRIES) { |
| pr_err("smsm_change_state: Invalid entry %d", |
| smsm_entry); |
| return 0; |
| } |
| |
| if (!smsm_info.state) { |
| pr_err("smsm_get_state <SM NO STATE>\n"); |
| } else { |
| rv = __raw_readl(SMSM_STATE_ADDR(smsm_entry)); |
| } |
| |
| return rv; |
| } |
| EXPORT_SYMBOL(smsm_get_state); |
| |
| /** |
| * Performs SMSM callback client notifiction. |
| */ |
| void notify_smsm_cb_clients_worker(struct work_struct *work) |
| { |
| struct smsm_state_cb_info *cb_info; |
| struct smsm_state_info *state_info; |
| int n; |
| uint32_t new_state; |
| uint32_t state_changes; |
| int ret; |
| unsigned long flags; |
| int snapshot_size = SMSM_NUM_ENTRIES * sizeof(uint32_t); |
| |
| if (!smd_initialized) |
| return; |
| |
| while (kfifo_len(&smsm_snapshot_fifo) >= snapshot_size) { |
| mutex_lock(&smsm_lock); |
| for (n = 0; n < SMSM_NUM_ENTRIES; n++) { |
| state_info = &smsm_states[n]; |
| |
| ret = kfifo_out(&smsm_snapshot_fifo, &new_state, |
| sizeof(new_state)); |
| if (ret != sizeof(new_state)) { |
| pr_err("%s: snapshot underflow %d\n", |
| __func__, ret); |
| mutex_unlock(&smsm_lock); |
| return; |
| } |
| |
| state_changes = state_info->last_value ^ new_state; |
| if (state_changes) { |
| SMx_POWER_INFO("SMSM Change %d: %08x->%08x\n", |
| n, state_info->last_value, |
| new_state); |
| list_for_each_entry(cb_info, |
| &state_info->callbacks, cb_list) { |
| |
| if (cb_info->mask & state_changes) |
| cb_info->notify(cb_info->data, |
| state_info->last_value, |
| new_state); |
| } |
| state_info->last_value = new_state; |
| } |
| } |
| mutex_unlock(&smsm_lock); |
| |
| spin_lock_irqsave(&smsm_snapshot_count_lock, flags); |
| if (smsm_snapshot_count) { |
| --smsm_snapshot_count; |
| if (smsm_snapshot_count == 0) { |
| SMx_POWER_INFO("SMSM snapshot wake unlock\n"); |
| wake_unlock(&smsm_snapshot_wakelock); |
| } |
| } else { |
| pr_err("%s: invalid snapshot count\n", __func__); |
| } |
| spin_unlock_irqrestore(&smsm_snapshot_count_lock, flags); |
| } |
| } |
| |
| |
| /** |
| * Registers callback for SMSM state notifications when the specified |
| * bits change. |
| * |
| * @smsm_entry Processor entry to deregister |
| * @mask Bits to deregister (if result is 0, callback is removed) |
| * @notify Notification function to deregister |
| * @data Opaque data passed in to callback |
| * |
| * @returns Status code |
| * <0 error code |
| * 0 inserted new entry |
| * 1 updated mask of existing entry |
| */ |
| int smsm_state_cb_register(uint32_t smsm_entry, uint32_t mask, |
| void (*notify)(void *, uint32_t, uint32_t), void *data) |
| { |
| struct smsm_state_cb_info *cb_info; |
| struct smsm_state_cb_info *cb_found = 0; |
| int ret = 0; |
| |
| if (smsm_entry >= SMSM_NUM_ENTRIES) |
| return -EINVAL; |
| |
| mutex_lock(&smsm_lock); |
| |
| if (!smsm_states) { |
| /* smsm not yet initialized */ |
| ret = -ENODEV; |
| goto cleanup; |
| } |
| |
| list_for_each_entry(cb_info, |
| &smsm_states[smsm_entry].callbacks, cb_list) { |
| if ((cb_info->notify == notify) && |
| (cb_info->data == data)) { |
| cb_info->mask |= mask; |
| cb_found = cb_info; |
| ret = 1; |
| break; |
| } |
| } |
| |
| if (!cb_found) { |
| cb_info = kmalloc(sizeof(struct smsm_state_cb_info), |
| GFP_ATOMIC); |
| if (!cb_info) { |
| ret = -ENOMEM; |
| goto cleanup; |
| } |
| |
| cb_info->mask = mask; |
| cb_info->notify = notify; |
| cb_info->data = data; |
| INIT_LIST_HEAD(&cb_info->cb_list); |
| list_add_tail(&cb_info->cb_list, |
| &smsm_states[smsm_entry].callbacks); |
| } |
| |
| cleanup: |
| mutex_unlock(&smsm_lock); |
| return ret; |
| } |
| EXPORT_SYMBOL(smsm_state_cb_register); |
| |
| |
| /** |
| * Deregisters for SMSM state notifications for the specified bits. |
| * |
| * @smsm_entry Processor entry to deregister |
| * @mask Bits to deregister (if result is 0, callback is removed) |
| * @notify Notification function to deregister |
| * @data Opaque data passed in to callback |
| * |
| * @returns Status code |
| * <0 error code |
| * 0 not found |
| * 1 updated mask |
| * 2 removed callback |
| */ |
| int smsm_state_cb_deregister(uint32_t smsm_entry, uint32_t mask, |
| void (*notify)(void *, uint32_t, uint32_t), void *data) |
| { |
| struct smsm_state_cb_info *cb_info; |
| int ret = 0; |
| |
| if (smsm_entry >= SMSM_NUM_ENTRIES) |
| return -EINVAL; |
| |
| mutex_lock(&smsm_lock); |
| |
| if (!smsm_states) { |
| /* smsm not yet initialized */ |
| mutex_unlock(&smsm_lock); |
| return -ENODEV; |
| } |
| |
| list_for_each_entry(cb_info, |
| &smsm_states[smsm_entry].callbacks, cb_list) { |
| if ((cb_info->notify == notify) && |
| (cb_info->data == data)) { |
| cb_info->mask &= ~mask; |
| ret = 1; |
| if (!cb_info->mask) { |
| /* no mask bits set, remove callback */ |
| list_del(&cb_info->cb_list); |
| kfree(cb_info); |
| ret = 2; |
| } |
| break; |
| } |
| } |
| |
| mutex_unlock(&smsm_lock); |
| return ret; |
| } |
| EXPORT_SYMBOL(smsm_state_cb_deregister); |
| |
| int smsm_driver_state_notifier_register(struct notifier_block *nb) |
| { |
| int ret; |
| if (!nb) |
| return -EINVAL; |
| mutex_lock(&smsm_driver_state_notifier_lock); |
| ret = raw_notifier_chain_register(&smsm_driver_state_notifier_list, nb); |
| mutex_unlock(&smsm_driver_state_notifier_lock); |
| return ret; |
| } |
| EXPORT_SYMBOL(smsm_driver_state_notifier_register); |
| |
| int smsm_driver_state_notifier_unregister(struct notifier_block *nb) |
| { |
| int ret; |
| if (!nb) |
| return -EINVAL; |
| mutex_lock(&smsm_driver_state_notifier_lock); |
| ret = raw_notifier_chain_unregister(&smsm_driver_state_notifier_list, |
| nb); |
| mutex_unlock(&smsm_driver_state_notifier_lock); |
| return ret; |
| } |
| EXPORT_SYMBOL(smsm_driver_state_notifier_unregister); |
| |
| static void smsm_driver_state_notify(uint32_t state, void *data) |
| { |
| mutex_lock(&smsm_driver_state_notifier_lock); |
| raw_notifier_call_chain(&smsm_driver_state_notifier_list, |
| state, data); |
| mutex_unlock(&smsm_driver_state_notifier_lock); |
| } |
| |
| int smd_core_init(void) |
| { |
| int r; |
| unsigned long flags = IRQF_TRIGGER_RISING; |
| SMD_INFO("smd_core_init()\n"); |
| |
| r = request_irq(INT_A9_M2A_0, smd_modem_irq_handler, |
| flags, "smd_dev", 0); |
| if (r < 0) |
| return r; |
| r = enable_irq_wake(INT_A9_M2A_0); |
| if (r < 0) |
| pr_err("smd_core_init: " |
| "enable_irq_wake failed for INT_A9_M2A_0\n"); |
| |
| r = request_irq(INT_A9_M2A_5, smsm_modem_irq_handler, |
| flags, "smsm_dev", 0); |
| if (r < 0) { |
| free_irq(INT_A9_M2A_0, 0); |
| return r; |
| } |
| r = enable_irq_wake(INT_A9_M2A_5); |
| if (r < 0) |
| pr_err("smd_core_init: " |
| "enable_irq_wake failed for INT_A9_M2A_5\n"); |
| |
| #if defined(CONFIG_QDSP6) |
| #if (INT_ADSP_A11 == INT_ADSP_A11_SMSM) |
| flags |= IRQF_SHARED; |
| #endif |
| r = request_irq(INT_ADSP_A11, smd_dsp_irq_handler, |
| flags, "smd_dev", smd_dsp_irq_handler); |
| if (r < 0) { |
| free_irq(INT_A9_M2A_0, 0); |
| free_irq(INT_A9_M2A_5, 0); |
| return r; |
| } |
| |
| r = request_irq(INT_ADSP_A11_SMSM, smsm_dsp_irq_handler, |
| flags, "smsm_dev", smsm_dsp_irq_handler); |
| if (r < 0) { |
| free_irq(INT_A9_M2A_0, 0); |
| free_irq(INT_A9_M2A_5, 0); |
| free_irq(INT_ADSP_A11, smd_dsp_irq_handler); |
| return r; |
| } |
| |
| r = enable_irq_wake(INT_ADSP_A11); |
| if (r < 0) |
| pr_err("smd_core_init: " |
| "enable_irq_wake failed for INT_ADSP_A11\n"); |
| |
| #if (INT_ADSP_A11 != INT_ADSP_A11_SMSM) |
| r = enable_irq_wake(INT_ADSP_A11_SMSM); |
| if (r < 0) |
| pr_err("smd_core_init: enable_irq_wake " |
| "failed for INT_ADSP_A11_SMSM\n"); |
| #endif |
| flags &= ~IRQF_SHARED; |
| #endif |
| |
| #if defined(CONFIG_DSPS) |
| r = request_irq(INT_DSPS_A11, smd_dsps_irq_handler, |
| flags, "smd_dev", smd_dsps_irq_handler); |
| if (r < 0) { |
| free_irq(INT_A9_M2A_0, 0); |
| free_irq(INT_A9_M2A_5, 0); |
| free_irq(INT_ADSP_A11, smd_dsp_irq_handler); |
| free_irq(INT_ADSP_A11_SMSM, smsm_dsp_irq_handler); |
| return r; |
| } |
| |
| r = enable_irq_wake(INT_DSPS_A11); |
| if (r < 0) |
| pr_err("smd_core_init: " |
| "enable_irq_wake failed for INT_ADSP_A11\n"); |
| #endif |
| |
| #if defined(CONFIG_WCNSS) |
| r = request_irq(INT_WCNSS_A11, smd_wcnss_irq_handler, |
| flags, "smd_dev", smd_wcnss_irq_handler); |
| if (r < 0) { |
| free_irq(INT_A9_M2A_0, 0); |
| free_irq(INT_A9_M2A_5, 0); |
| free_irq(INT_ADSP_A11, smd_dsp_irq_handler); |
| free_irq(INT_ADSP_A11_SMSM, smsm_dsp_irq_handler); |
| free_irq(INT_DSPS_A11, smd_dsps_irq_handler); |
| return r; |
| } |
| |
| r = enable_irq_wake(INT_WCNSS_A11); |
| if (r < 0) |
| pr_err("smd_core_init: " |
| "enable_irq_wake failed for INT_WCNSS_A11\n"); |
| |
| r = request_irq(INT_WCNSS_A11_SMSM, smsm_wcnss_irq_handler, |
| flags, "smsm_dev", smsm_wcnss_irq_handler); |
| if (r < 0) { |
| free_irq(INT_A9_M2A_0, 0); |
| free_irq(INT_A9_M2A_5, 0); |
| free_irq(INT_ADSP_A11, smd_dsp_irq_handler); |
| free_irq(INT_ADSP_A11_SMSM, smsm_dsp_irq_handler); |
| free_irq(INT_DSPS_A11, smd_dsps_irq_handler); |
| free_irq(INT_WCNSS_A11, smd_wcnss_irq_handler); |
| return r; |
| } |
| |
| r = enable_irq_wake(INT_WCNSS_A11_SMSM); |
| if (r < 0) |
| pr_err("smd_core_init: " |
| "enable_irq_wake failed for INT_WCNSS_A11_SMSM\n"); |
| #endif |
| |
| #if defined(CONFIG_DSPS_SMSM) |
| r = request_irq(INT_DSPS_A11_SMSM, smsm_dsps_irq_handler, |
| flags, "smsm_dev", smsm_dsps_irq_handler); |
| if (r < 0) { |
| free_irq(INT_A9_M2A_0, 0); |
| free_irq(INT_A9_M2A_5, 0); |
| free_irq(INT_ADSP_A11, smd_dsp_irq_handler); |
| free_irq(INT_ADSP_A11_SMSM, smsm_dsp_irq_handler); |
| free_irq(INT_DSPS_A11, smd_dsps_irq_handler); |
| free_irq(INT_WCNSS_A11, smd_wcnss_irq_handler); |
| free_irq(INT_WCNSS_A11_SMSM, smsm_wcnss_irq_handler); |
| return r; |
| } |
| |
| r = enable_irq_wake(INT_DSPS_A11_SMSM); |
| if (r < 0) |
| pr_err("smd_core_init: " |
| "enable_irq_wake failed for INT_DSPS_A11_SMSM\n"); |
| #endif |
| SMD_INFO("smd_core_init() done\n"); |
| |
| return 0; |
| } |
| |
| static int intr_init(struct interrupt_config_item *private_irq, |
| struct smd_irq_config *platform_irq, |
| struct platform_device *pdev |
| ) |
| { |
| int irq_id; |
| int ret; |
| int ret_wake; |
| |
| private_irq->out_bit_pos = platform_irq->out_bit_pos; |
| private_irq->out_offset = platform_irq->out_offset; |
| private_irq->out_base = platform_irq->out_base; |
| |
| irq_id = platform_get_irq_byname( |
| pdev, |
| platform_irq->irq_name |
| ); |
| SMD_DBG("smd: %s: register irq: %s id: %d\n", __func__, |
| platform_irq->irq_name, irq_id); |
| ret = request_irq(irq_id, |
| private_irq->irq_handler, |
| platform_irq->flags, |
| platform_irq->device_name, |
| (void *)platform_irq->dev_id |
| ); |
| if (ret < 0) { |
| platform_irq->irq_id = ret; |
| } else { |
| platform_irq->irq_id = irq_id; |
| ret_wake = enable_irq_wake(irq_id); |
| if (ret_wake < 0) { |
| pr_err("smd: enable_irq_wake failed on %s", |
| platform_irq->irq_name); |
| } |
| } |
| |
| return ret; |
| } |
| |
| int smd_core_platform_init(struct platform_device *pdev) |
| { |
| int i; |
| int ret; |
| uint32_t num_ss; |
| struct smd_platform *smd_platform_data; |
| struct smd_subsystem_config *smd_ss_config_list; |
| struct smd_subsystem_config *cfg; |
| int err_ret = 0; |
| |
| smd_platform_data = pdev->dev.platform_data; |
| num_ss = smd_platform_data->num_ss_configs; |
| smd_ss_config_list = smd_platform_data->smd_ss_configs; |
| |
| if (smd_platform_data->smd_ssr_config) |
| disable_smsm_reset_handshake = smd_platform_data-> |
| smd_ssr_config->disable_smsm_reset_handshake; |
| |
| for (i = 0; i < num_ss; i++) { |
| cfg = &smd_ss_config_list[i]; |
| |
| ret = intr_init( |
| &private_intr_config[cfg->irq_config_id].smd, |
| &cfg->smd_int, |
| pdev |
| ); |
| |
| if (ret < 0) { |
| err_ret = ret; |
| pr_err("smd: register irq failed on %s\n", |
| cfg->smd_int.irq_name); |
| break; |
| } |
| |
| ret = intr_init( |
| &private_intr_config[cfg->irq_config_id].smsm, |
| &cfg->smsm_int, |
| pdev |
| ); |
| |
| if (ret < 0) { |
| err_ret = ret; |
| pr_err("smd: register irq failed on %s\n", |
| cfg->smsm_int.irq_name); |
| break; |
| } |
| |
| strncpy(edge_to_pids[cfg->edge].subsys_name, |
| cfg->subsys_name, SMD_MAX_CH_NAME_LEN); |
| } |
| |
| if (err_ret < 0) { |
| pr_err("smd: deregistering IRQs\n"); |
| for (i = 0; i < num_ss; ++i) { |
| cfg = &smd_ss_config_list[i]; |
| |
| if (cfg->smd_int.irq_id >= 0) |
| free_irq(cfg->smd_int.irq_id, |
| (void *)cfg->smd_int.dev_id |
| ); |
| if (cfg->smsm_int.irq_id >= 0) |
| free_irq(cfg->smsm_int.irq_id, |
| (void *)cfg->smsm_int.dev_id |
| ); |
| } |
| return err_ret; |
| } |
| |
| SMD_INFO("smd_core_platform_init() done\n"); |
| return 0; |
| |
| } |
| |
| static int __devinit msm_smd_probe(struct platform_device *pdev) |
| { |
| int ret; |
| |
| SMD_INFO("smd probe\n"); |
| INIT_WORK(&probe_work, smd_channel_probe_worker); |
| |
| channel_close_wq = create_singlethread_workqueue("smd_channel_close"); |
| if (IS_ERR(channel_close_wq)) { |
| pr_err("%s: create_singlethread_workqueue ENOMEM\n", __func__); |
| return -ENOMEM; |
| } |
| |
| if (smsm_init()) { |
| pr_err("smsm_init() failed\n"); |
| return -1; |
| } |
| |
| if (pdev) { |
| if (pdev->dev.of_node) { |
| pr_err("SMD: Device tree not currently supported\n"); |
| return -ENODEV; |
| } else if (pdev->dev.platform_data) { |
| ret = smd_core_platform_init(pdev); |
| if (ret) { |
| pr_err( |
| "SMD: smd_core_platform_init() failed\n"); |
| return -ENODEV; |
| } |
| } else { |
| ret = smd_core_init(); |
| if (ret) { |
| pr_err("smd_core_init() failed\n"); |
| return -ENODEV; |
| } |
| } |
| } else { |
| pr_err("SMD: PDEV not found\n"); |
| return -ENODEV; |
| } |
| |
| smd_initialized = 1; |
| |
| smd_alloc_loopback_channel(); |
| smsm_irq_handler(0, 0); |
| tasklet_schedule(&smd_fake_irq_tasklet); |
| |
| return 0; |
| } |
| |
| static int restart_notifier_cb(struct notifier_block *this, |
| unsigned long code, |
| void *data); |
| |
| static struct restart_notifier_block restart_notifiers[] = { |
| {SMD_MODEM, "modem", .nb.notifier_call = restart_notifier_cb}, |
| {SMD_Q6, "lpass", .nb.notifier_call = restart_notifier_cb}, |
| {SMD_WCNSS, "riva", .nb.notifier_call = restart_notifier_cb}, |
| {SMD_DSPS, "dsps", .nb.notifier_call = restart_notifier_cb}, |
| {SMD_MODEM, "gss", .nb.notifier_call = restart_notifier_cb}, |
| }; |
| |
| static int restart_notifier_cb(struct notifier_block *this, |
| unsigned long code, |
| void *data) |
| { |
| if (code == SUBSYS_AFTER_SHUTDOWN) { |
| struct restart_notifier_block *notifier; |
| |
| notifier = container_of(this, |
| struct restart_notifier_block, nb); |
| SMD_INFO("%s: ssrestart for processor %d ('%s')\n", |
| __func__, notifier->processor, |
| notifier->name); |
| |
| smd_channel_reset(notifier->processor); |
| } |
| |
| return NOTIFY_DONE; |
| } |
| |
| static __init int modem_restart_late_init(void) |
| { |
| int i; |
| void *handle; |
| struct restart_notifier_block *nb; |
| |
| for (i = 0; i < ARRAY_SIZE(restart_notifiers); i++) { |
| nb = &restart_notifiers[i]; |
| handle = subsys_notif_register_notifier(nb->name, &nb->nb); |
| SMD_DBG("%s: registering notif for '%s', handle=%p\n", |
| __func__, nb->name, handle); |
| } |
| return 0; |
| } |
| late_initcall(modem_restart_late_init); |
| |
| static struct platform_driver msm_smd_driver = { |
| .probe = msm_smd_probe, |
| .driver = { |
| .name = MODULE_NAME, |
| .owner = THIS_MODULE, |
| }, |
| }; |
| |
| static int __init msm_smd_init(void) |
| { |
| return platform_driver_register(&msm_smd_driver); |
| } |
| |
| module_init(msm_smd_init); |
| |
| MODULE_DESCRIPTION("MSM Shared Memory Core"); |
| MODULE_AUTHOR("Brian Swetland <swetland@google.com>"); |
| MODULE_LICENSE("GPL"); |