From bb39b8d99aae1f7eb13a97bd874838da91080de6 Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Fri, 28 Feb 2014 20:30:08 +0000 Subject: brcm2708: update against latest rpi-3.10.y branch Update our copies of the brcm2708 patches to the latest rpi-3.10-y rebased against linux-3.10.y stable (3.10.32). This should hopefully make it easier for us in the future to leverage the raspberry/rpi-* branches. Signed-off-by: Florian Fainelli SVN-Revision: 39770 --- ...ency-mode-to-sdcard-driver.-Disable-with-.patch | 514 +++++++++++++++++++++ 1 file changed, 514 insertions(+) create mode 100644 target/linux/brcm2708/patches-3.10/0026-Add-low-latency-mode-to-sdcard-driver.-Disable-with-.patch (limited to 'target/linux/brcm2708/patches-3.10/0026-Add-low-latency-mode-to-sdcard-driver.-Disable-with-.patch') diff --git a/target/linux/brcm2708/patches-3.10/0026-Add-low-latency-mode-to-sdcard-driver.-Disable-with-.patch b/target/linux/brcm2708/patches-3.10/0026-Add-low-latency-mode-to-sdcard-driver.-Disable-with-.patch new file mode 100644 index 0000000000..dfb61a6cdb --- /dev/null +++ b/target/linux/brcm2708/patches-3.10/0026-Add-low-latency-mode-to-sdcard-driver.-Disable-with-.patch @@ -0,0 +1,514 @@ +From fc153c5cb49f20f5e9644d92b8be064ed9159a16 Mon Sep 17 00:00:00 2001 +From: popcornmix +Date: Sun, 12 May 2013 12:27:48 +0100 +Subject: [PATCH 026/174] Add low-latency mode to sdcard driver. Disable with + sdhci-bcm2708.enable_llm=0. Thanks ddv2005. + +--- + drivers/mmc/host/sdhci-bcm2708.c | 17 ++-- + drivers/mmc/host/sdhci.c | 165 ++++++++++++++++++++++++++++++--------- + drivers/mmc/host/sdhci.h | 6 ++ + include/linux/mmc/sdhci.h | 1 + + 4 files changed, 145 insertions(+), 44 deletions(-) + +--- a/drivers/mmc/host/sdhci-bcm2708.c ++++ b/drivers/mmc/host/sdhci-bcm2708.c +@@ -135,6 +135,7 @@ static bool allow_highspeed = 1; + static int emmc_clock_freq = BCM2708_EMMC_CLOCK_FREQ; + static bool sync_after_dma = 1; + static bool missing_status = 1; ++bool enable_llm = 1; + + #if 0 + static void hptime_test(void) +@@ -871,12 +872,11 @@ static irqreturn_t sdhci_bcm2708_dma_irq + struct sdhci_host *host = dev_id; + struct sdhci_bcm2708_priv *host_priv = SDHCI_HOST_PRIV(host); + u32 dma_cs; /* control and status register */ +- unsigned long flags; + + BUG_ON(NULL == dev_id); + BUG_ON(NULL == host_priv->dma_chan_base); + +- spin_lock_irqsave(&host->lock, flags); ++ sdhci_spin_lock(host); + + dma_cs = readl(host_priv->dma_chan_base + BCM2708_DMA_CS); + +@@ -917,8 +917,7 @@ static irqreturn_t sdhci_bcm2708_dma_irq + + result = IRQ_HANDLED; + } +- +- spin_unlock_irqrestore(&host->lock, flags); ++ sdhci_spin_unlock(host); + + return result; + } +@@ -1193,9 +1192,12 @@ static int sdhci_bcm2708_probe(struct pl + sdhci_bcm2708_ops.missing_status = sdhci_bcm2708_missing_status; + } + ++ printk("sdhci: %s low-latency mode\n",enable_llm?"Enable":"Disable"); ++ + host->hw_name = "BCM2708_Arasan"; + host->ops = &sdhci_bcm2708_ops; + host->irq = platform_get_irq(pdev, 0); ++ host->second_irq = 0; + + host->quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION | + SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK | +@@ -1256,12 +1258,13 @@ static int sdhci_bcm2708_probe(struct pl + } + host_priv->dma_chan = ret; + +- ret = request_irq(host_priv->dma_irq, sdhci_bcm2708_dma_irq, +- IRQF_SHARED, DRIVER_NAME " (dma)", host); ++ ret = request_irq(host_priv->dma_irq, sdhci_bcm2708_dma_irq,0,//IRQF_SHARED, ++ DRIVER_NAME " (dma)", host); + if (ret) { + dev_err(&pdev->dev, "cannot set DMA IRQ\n"); + goto err_add_dma_irq; + } ++ host->second_irq = host_priv->dma_irq; + DBG("DMA CBs %p handle %08X DMA%d %p DMA IRQ %d\n", + host_priv->cb_base, (unsigned)host_priv->cb_handle, + host_priv->dma_chan, host_priv->dma_chan_base, +@@ -1384,6 +1387,7 @@ module_param(allow_highspeed, bool, 0444 + module_param(emmc_clock_freq, int, 0444); + module_param(sync_after_dma, bool, 0444); + module_param(missing_status, bool, 0444); ++module_param(enable_llm, bool, 0444); + + MODULE_DESCRIPTION("Secure Digital Host Controller Interface platform driver"); + MODULE_AUTHOR("Broadcom "); +@@ -1394,5 +1398,6 @@ MODULE_PARM_DESC(allow_highspeed, "Allow + MODULE_PARM_DESC(emmc_clock_freq, "Specify the speed of emmc clock"); + MODULE_PARM_DESC(sync_after_dma, "Block in driver until dma complete"); + MODULE_PARM_DESC(missing_status, "Use the missing status quirk"); ++MODULE_PARM_DESC(enable_llm, "Enable low-latency mode"); + + +--- a/drivers/mmc/host/sdhci.c ++++ b/drivers/mmc/host/sdhci.c +@@ -124,6 +124,91 @@ static void sdhci_dumpregs(struct sdhci_ + * Low level functions * + * * + \*****************************************************************************/ ++extern bool enable_llm; ++static int sdhci_locked=0; ++void sdhci_spin_lock(struct sdhci_host *host) ++{ ++ spin_lock(&host->lock); ++#ifdef CONFIG_PREEMPT ++ if(enable_llm) ++ { ++ disable_irq_nosync(host->irq); ++ if(host->second_irq) ++ disable_irq_nosync(host->second_irq); ++ local_irq_enable(); ++ } ++#endif ++} ++ ++void sdhci_spin_unlock(struct sdhci_host *host) ++{ ++#ifdef CONFIG_PREEMPT ++ if(enable_llm) ++ { ++ local_irq_disable(); ++ if(host->second_irq) ++ enable_irq(host->second_irq); ++ enable_irq(host->irq); ++ } ++#endif ++ spin_unlock(&host->lock); ++} ++ ++void sdhci_spin_lock_irqsave(struct sdhci_host *host,unsigned long *flags) ++{ ++#ifdef CONFIG_PREEMPT ++ if(enable_llm) ++ { ++ while(sdhci_locked) ++ { ++ preempt_schedule(); ++ } ++ spin_lock_irqsave(&host->lock,*flags); ++ disable_irq(host->irq); ++ if(host->second_irq) ++ disable_irq(host->second_irq); ++ local_irq_enable(); ++ } ++ else ++#endif ++ spin_lock_irqsave(&host->lock,*flags); ++} ++ ++void sdhci_spin_unlock_irqrestore(struct sdhci_host *host,unsigned long flags) ++{ ++#ifdef CONFIG_PREEMPT ++ if(enable_llm) ++ { ++ local_irq_disable(); ++ if(host->second_irq) ++ enable_irq(host->second_irq); ++ enable_irq(host->irq); ++ } ++#endif ++ spin_unlock_irqrestore(&host->lock,flags); ++} ++ ++static void sdhci_spin_enable_schedule(struct sdhci_host *host) ++{ ++#ifdef CONFIG_PREEMPT ++ if(enable_llm) ++ { ++ sdhci_locked = 1; ++ preempt_enable(); ++ } ++#endif ++} ++ ++static void sdhci_spin_disable_schedule(struct sdhci_host *host) ++{ ++#ifdef CONFIG_PREEMPT ++ if(enable_llm) ++ { ++ preempt_disable(); ++ sdhci_locked = 0; ++ } ++#endif ++} + + static void sdhci_clear_set_irqs(struct sdhci_host *host, u32 clear, u32 set) + { +@@ -289,7 +374,7 @@ static void sdhci_led_control(struct led + struct sdhci_host *host = container_of(led, struct sdhci_host, led); + unsigned long flags; + +- spin_lock_irqsave(&host->lock, flags); ++ sdhci_spin_lock_irqsave(host, &flags); + + if (host->runtime_suspended) + goto out; +@@ -299,7 +384,7 @@ static void sdhci_led_control(struct led + else + sdhci_activate_led(host); + out: +- spin_unlock_irqrestore(&host->lock, flags); ++ sdhci_spin_unlock_irqrestore(host, flags); + } + #endif + +@@ -1007,7 +1092,9 @@ static void sdhci_send_command(struct sd + return; + } + timeout--; ++ sdhci_spin_enable_schedule(host); + mdelay(1); ++ sdhci_spin_disable_schedule(host); + } + DBG("send cmd %d - wait 0x%X irq 0x%x\n", cmd->opcode, mask, + sdhci_readl(host, SDHCI_INT_STATUS)); +@@ -1234,7 +1321,9 @@ clock_set: + return; + } + timeout--; ++ sdhci_spin_enable_schedule(host); + mdelay(1); ++ sdhci_spin_disable_schedule(host); + } + + clk |= SDHCI_CLOCK_CARD_EN; +@@ -1330,7 +1419,7 @@ static void sdhci_request(struct mmc_hos + + sdhci_runtime_pm_get(host); + +- spin_lock_irqsave(&host->lock, flags); ++ sdhci_spin_lock_irqsave(host, &flags); + + WARN_ON(host->mrq != NULL); + +@@ -1388,9 +1477,9 @@ static void sdhci_request(struct mmc_hos + mmc->card->type == MMC_TYPE_MMC ? + MMC_SEND_TUNING_BLOCK_HS200 : + MMC_SEND_TUNING_BLOCK; +- spin_unlock_irqrestore(&host->lock, flags); ++ sdhci_spin_unlock_irqrestore(host, flags); + sdhci_execute_tuning(mmc, tuning_opcode); +- spin_lock_irqsave(&host->lock, flags); ++ sdhci_spin_lock_irqsave(host, &flags); + + /* Restore original mmc_request structure */ + host->mrq = mrq; +@@ -1404,7 +1493,7 @@ static void sdhci_request(struct mmc_hos + } + + mmiowb(); +- spin_unlock_irqrestore(&host->lock, flags); ++ sdhci_spin_unlock_irqrestore(host, flags); + } + + static void sdhci_do_set_ios(struct sdhci_host *host, struct mmc_ios *ios) +@@ -1413,10 +1502,10 @@ static void sdhci_do_set_ios(struct sdhc + int vdd_bit = -1; + u8 ctrl; + +- spin_lock_irqsave(&host->lock, flags); ++ sdhci_spin_lock_irqsave(host, &flags); + + if (host->flags & SDHCI_DEVICE_DEAD) { +- spin_unlock_irqrestore(&host->lock, flags); ++ sdhci_spin_unlock_irqrestore(host, flags); + if (host->vmmc && ios->power_mode == MMC_POWER_OFF) + mmc_regulator_set_ocr(host->mmc, host->vmmc, 0); + return; +@@ -1443,9 +1532,9 @@ static void sdhci_do_set_ios(struct sdhc + vdd_bit = sdhci_set_power(host, ios->vdd); + + if (host->vmmc && vdd_bit != -1) { +- spin_unlock_irqrestore(&host->lock, flags); ++ sdhci_spin_unlock_irqrestore(host, flags); + mmc_regulator_set_ocr(host->mmc, host->vmmc, vdd_bit); +- spin_lock_irqsave(&host->lock, flags); ++ sdhci_spin_lock_irqsave(host, &flags); + } + + if (host->ops->platform_send_init_74_clocks) +@@ -1583,7 +1672,7 @@ static void sdhci_do_set_ios(struct sdhc + sdhci_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA); + + mmiowb(); +- spin_unlock_irqrestore(&host->lock, flags); ++ sdhci_spin_unlock_irqrestore(host, flags); + } + + static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) +@@ -1631,7 +1720,7 @@ static int sdhci_check_ro(struct sdhci_h + unsigned long flags; + int is_readonly; + +- spin_lock_irqsave(&host->lock, flags); ++ sdhci_spin_lock_irqsave(host, &flags); + + if (host->flags & SDHCI_DEVICE_DEAD) + is_readonly = 0; +@@ -1641,7 +1730,7 @@ static int sdhci_check_ro(struct sdhci_h + is_readonly = !(sdhci_readl(host, SDHCI_PRESENT_STATE) + & SDHCI_WRITE_PROTECT); + +- spin_unlock_irqrestore(&host->lock, flags); ++ sdhci_spin_unlock_irqrestore(host, flags); + + /* This quirk needs to be replaced by a callback-function later */ + return host->quirks & SDHCI_QUIRK_INVERTED_WRITE_PROTECT ? +@@ -1714,9 +1803,9 @@ static void sdhci_enable_sdio_irq(struct + struct sdhci_host *host = mmc_priv(mmc); + unsigned long flags; + +- spin_lock_irqsave(&host->lock, flags); ++ sdhci_spin_lock_irqsave(host, &flags); + sdhci_enable_sdio_irq_nolock(host, enable); +- spin_unlock_irqrestore(&host->lock, flags); ++ sdhci_spin_unlock_irqrestore(host, flags); + } + + static int sdhci_do_start_signal_voltage_switch(struct sdhci_host *host, +@@ -2060,7 +2149,7 @@ static void sdhci_card_event(struct mmc_ + struct sdhci_host *host = mmc_priv(mmc); + unsigned long flags; + +- spin_lock_irqsave(&host->lock, flags); ++ sdhci_spin_lock_irqsave(host, &flags); + + /* Check host->mrq first in case we are runtime suspended */ + if (host->mrq && +@@ -2077,7 +2166,7 @@ static void sdhci_card_event(struct mmc_ + tasklet_schedule(&host->finish_tasklet); + } + +- spin_unlock_irqrestore(&host->lock, flags); ++ sdhci_spin_unlock_irqrestore(host, flags); + } + + static const struct mmc_host_ops sdhci_ops = { +@@ -2116,14 +2205,14 @@ static void sdhci_tasklet_finish(unsigne + + host = (struct sdhci_host*)param; + +- spin_lock_irqsave(&host->lock, flags); ++ sdhci_spin_lock_irqsave(host, &flags); + + /* + * If this tasklet gets rescheduled while running, it will + * be run again afterwards but without any active request. + */ + if (!host->mrq) { +- spin_unlock_irqrestore(&host->lock, flags); ++ sdhci_spin_unlock_irqrestore(host, flags); + return; + } + +@@ -2161,7 +2250,7 @@ static void sdhci_tasklet_finish(unsigne + #endif + + mmiowb(); +- spin_unlock_irqrestore(&host->lock, flags); ++ sdhci_spin_unlock_irqrestore(host, flags); + + mmc_request_done(host->mmc, mrq); + sdhci_runtime_pm_put(host); +@@ -2174,7 +2263,7 @@ static void sdhci_timeout_timer(unsigned + + host = (struct sdhci_host*)data; + +- spin_lock_irqsave(&host->lock, flags); ++ sdhci_spin_lock_irqsave(host, &flags); + + if (host->mrq) { + pr_err("%s: Timeout waiting for hardware " +@@ -2195,7 +2284,7 @@ static void sdhci_timeout_timer(unsigned + } + + mmiowb(); +- spin_unlock_irqrestore(&host->lock, flags); ++ sdhci_spin_unlock_irqrestore(host, flags); + } + + static void sdhci_tuning_timer(unsigned long data) +@@ -2205,11 +2294,11 @@ static void sdhci_tuning_timer(unsigned + + host = (struct sdhci_host *)data; + +- spin_lock_irqsave(&host->lock, flags); ++ sdhci_spin_lock_irqsave(host, &flags); + + host->flags |= SDHCI_NEEDS_RETUNING; + +- spin_unlock_irqrestore(&host->lock, flags); ++ sdhci_spin_unlock_irqrestore(host, flags); + } + + /*****************************************************************************\ +@@ -2433,10 +2522,10 @@ static irqreturn_t sdhci_irq(int irq, vo + u32 intmask, unexpected = 0; + int cardint = 0, max_loops = 16; + +- spin_lock(&host->lock); ++ sdhci_spin_lock(host); + + if (host->runtime_suspended) { +- spin_unlock(&host->lock); ++ sdhci_spin_unlock(host); + pr_warning("%s: got irq while runtime suspended\n", + mmc_hostname(host->mmc)); + return IRQ_HANDLED; +@@ -2540,7 +2629,7 @@ again: + if (intmask && --max_loops) + goto again; + out: +- spin_unlock(&host->lock); ++ sdhci_spin_unlock(host); + + if (unexpected) { + pr_err("%s: Unexpected interrupt 0x%08x.\n", +@@ -2702,15 +2791,15 @@ int sdhci_runtime_suspend_host(struct sd + host->flags &= ~SDHCI_NEEDS_RETUNING; + } + +- spin_lock_irqsave(&host->lock, flags); ++ sdhci_spin_lock_irqsave(host, &flags); + sdhci_mask_irqs(host, SDHCI_INT_ALL_MASK); +- spin_unlock_irqrestore(&host->lock, flags); ++ sdhci_spin_unlock_irqrestore(host, flags); + + synchronize_irq(host->irq); + +- spin_lock_irqsave(&host->lock, flags); ++ sdhci_spin_lock_irqsave(host, &flags); + host->runtime_suspended = true; +- spin_unlock_irqrestore(&host->lock, flags); ++ sdhci_spin_unlock_irqrestore(host, flags); + + return ret; + } +@@ -2736,16 +2825,16 @@ int sdhci_runtime_resume_host(struct sdh + sdhci_do_start_signal_voltage_switch(host, &host->mmc->ios); + if ((host_flags & SDHCI_PV_ENABLED) && + !(host->quirks2 & SDHCI_QUIRK2_PRESET_VALUE_BROKEN)) { +- spin_lock_irqsave(&host->lock, flags); ++ sdhci_spin_lock_irqsave(host, &flags); + sdhci_enable_preset_value(host, true); +- spin_unlock_irqrestore(&host->lock, flags); ++ sdhci_spin_unlock_irqrestore(host, flags); + } + + /* Set the re-tuning expiration flag */ + if (host->flags & SDHCI_USING_RETUNING_TIMER) + host->flags |= SDHCI_NEEDS_RETUNING; + +- spin_lock_irqsave(&host->lock, flags); ++ sdhci_spin_lock_irqsave(host, &flags); + + host->runtime_suspended = false; + +@@ -2756,7 +2845,7 @@ int sdhci_runtime_resume_host(struct sdh + /* Enable Card Detection */ + sdhci_enable_card_detection(host); + +- spin_unlock_irqrestore(&host->lock, flags); ++ sdhci_spin_unlock_irqrestore(host, flags); + + return ret; + } +@@ -3248,7 +3337,7 @@ int sdhci_add_host(struct sdhci_host *ho + host->tuning_timer.function = sdhci_tuning_timer; + } + +- ret = request_irq(host->irq, sdhci_irq, IRQF_SHARED, ++ ret = request_irq(host->irq, sdhci_irq, 0,//IRQF_SHARED, + mmc_hostname(mmc), host); + if (ret) { + pr_err("%s: Failed to request IRQ %d: %d\n", +@@ -3312,7 +3401,7 @@ void sdhci_remove_host(struct sdhci_host + unsigned long flags; + + if (dead) { +- spin_lock_irqsave(&host->lock, flags); ++ sdhci_spin_lock_irqsave(host, &flags); + + host->flags |= SDHCI_DEVICE_DEAD; + +@@ -3324,7 +3413,7 @@ void sdhci_remove_host(struct sdhci_host + tasklet_schedule(&host->finish_tasklet); + } + +- spin_unlock_irqrestore(&host->lock, flags); ++ sdhci_spin_unlock_irqrestore(host, flags); + } + + sdhci_disable_card_detection(host); +--- a/drivers/mmc/host/sdhci.h ++++ b/drivers/mmc/host/sdhci.h +@@ -441,4 +441,10 @@ extern int sdhci_runtime_suspend_host(st + extern int sdhci_runtime_resume_host(struct sdhci_host *host); + #endif + ++extern void sdhci_spin_lock_irqsave(struct sdhci_host *host,unsigned long *flags); ++extern void sdhci_spin_unlock_irqrestore(struct sdhci_host *host,unsigned long flags); ++extern void sdhci_spin_lock(struct sdhci_host *host); ++extern void sdhci_spin_unlock(struct sdhci_host *host); ++ ++ + #endif /* __SDHCI_HW_H */ +--- a/include/linux/mmc/sdhci.h ++++ b/include/linux/mmc/sdhci.h +@@ -97,6 +97,7 @@ struct sdhci_host { + #define SDHCI_QUIRK2_PRESET_VALUE_BROKEN (1<<3) + + int irq; /* Device IRQ */ ++ int second_irq; /* Additional IRQ to disable/enable in low-latency mode */ + void __iomem *ioaddr; /* Mapped address */ + + const struct sdhci_ops *ops; /* Low level hw interface */ -- cgit v1.2.3