diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0224-Revert-bcm2835-sdhost-Adjust-to-core-clock-changes.patch')
-rw-r--r-- | target/linux/brcm2708/patches-4.4/0224-Revert-bcm2835-sdhost-Adjust-to-core-clock-changes.patch | 327 |
1 files changed, 0 insertions, 327 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0224-Revert-bcm2835-sdhost-Adjust-to-core-clock-changes.patch b/target/linux/brcm2708/patches-4.4/0224-Revert-bcm2835-sdhost-Adjust-to-core-clock-changes.patch deleted file mode 100644 index 5469934375..0000000000 --- a/target/linux/brcm2708/patches-4.4/0224-Revert-bcm2835-sdhost-Adjust-to-core-clock-changes.patch +++ /dev/null @@ -1,327 +0,0 @@ -From a48331cf3aaa92e7290e8876b13bd1efd64541e6 Mon Sep 17 00:00:00 2001 -From: Phil Elwell <phil@raspberrypi.org> -Date: Mon, 4 Apr 2016 12:35:51 +0100 -Subject: [PATCH] Revert "bcm2835-sdhost: Adjust to core clock changes" - -This reverts commit 4b89d07fd299a0f4e25321920cb74416ba2e638e. ---- - drivers/mmc/host/Kconfig | 1 - - drivers/mmc/host/bcm2835-sdhost.c | 140 ++++++-------------------------------- - 2 files changed, 22 insertions(+), 119 deletions(-) - ---- a/drivers/mmc/host/Kconfig -+++ b/drivers/mmc/host/Kconfig -@@ -36,7 +36,6 @@ config MMC_BCM2835_PIO_DMA_BARRIER - config MMC_BCM2835_SDHOST - tristate "Support for the SDHost controller on BCM2708/9" - depends on MACH_BCM2708 || MACH_BCM2709 || ARCH_BCM2835 -- depends on RASPBERRYPI_FIRMWARE - help - This selects the SDHost controller on BCM2835/6. - ---- a/drivers/mmc/host/bcm2835-sdhost.c -+++ b/drivers/mmc/host/bcm2835-sdhost.c -@@ -50,10 +50,6 @@ - #include <linux/of_dma.h> - #include <linux/time.h> - #include <linux/workqueue.h> --#include <linux/cpufreq.h> --#include <linux/semaphore.h> --#include <soc/bcm2835/raspberrypi-firmware.h> -- - - #define DRIVER_NAME "sdhost-bcm2835" - -@@ -140,8 +136,6 @@ - - #define MHZ 1000000 - --#define RPI_FIRMWARE_CLOCK_CORE 4 -- - - struct bcm2835_host { - spinlock_t lock; -@@ -157,9 +151,7 @@ struct bcm2835_host { - - bool slow_card; /* Force 11-bit divisor */ - -- unsigned int max_clk; /* Max src clock freq */ -- unsigned int min_clk; /* Min src clock freq */ -- unsigned int cur_clk; /* Current src clock freq */ -+ unsigned int max_clk; /* Max possible freq */ - - struct tasklet_struct finish_tasklet; /* Tasklet structures */ - -@@ -191,7 +183,6 @@ struct bcm2835_host { - unsigned int use_sbc:1; /* Send CMD23 */ - - unsigned int debug:1; /* Enable debug output */ -- unsigned int variable_clock:1; /* The core clock may change */ - - /*DMA part*/ - struct dma_chan *dma_chan_rxtx; /* DMA channel for reads and writes */ -@@ -217,9 +208,6 @@ struct bcm2835_host { - u32 pio_limit; /* Maximum block count for PIO (0 = always DMA) */ - - u32 sectors; /* Cached card size in sectors */ -- -- struct notifier_block cpufreq_nb; /* The cpufreq callback list item */ -- struct semaphore cpufreq_semaphore; /* Interlock between SD activity and cpufreq changes */ - }; - - #if ENABLE_LOG -@@ -239,10 +227,6 @@ static u32 sdhost_log_idx; - static spinlock_t log_lock; - static void __iomem *timer_base; - --static int bcm2835_sdhost_cpufreq_callback(struct notifier_block *nb, -- unsigned long action, void *data); --static unsigned int get_core_clock(unsigned int mode); -- - #define LOG_ENTRIES (256*1) - #define LOG_SIZE (sizeof(LOG_ENTRY_T)*LOG_ENTRIES) - -@@ -464,14 +448,20 @@ static void bcm2835_sdhost_reset(struct - - static void bcm2835_sdhost_set_ios(struct mmc_host *mmc, struct mmc_ios *ios); - --static void bcm2835_sdhost_init(struct bcm2835_host *host) -+static void bcm2835_sdhost_init(struct bcm2835_host *host, int soft) - { -- pr_debug("bcm2835_sdhost_init()\n"); -+ pr_debug("bcm2835_sdhost_init(%d)\n", soft); - - /* Set interrupt enables */ - host->hcfg = SDHCFG_BUSY_IRPT_EN; - - bcm2835_sdhost_reset_internal(host); -+ -+ if (soft) { -+ /* force clock reconfiguration */ -+ host->clock = 0; -+ bcm2835_sdhost_set_ios(host->mmc, &host->mmc->ios); -+ } - } - - static void bcm2835_sdhost_wait_transfer_complete(struct bcm2835_host *host) -@@ -1509,10 +1499,10 @@ static irqreturn_t bcm2835_sdhost_irq(in - return result; - } - --void bcm2835_sdhost_set_clock(struct bcm2835_host *host) -+void bcm2835_sdhost_set_clock(struct bcm2835_host *host, unsigned int clock) - { - int div = 0; /* Initialized for compiler warning */ -- unsigned int clock = host->clock; -+ unsigned int input_clock = clock; - - if (host->debug) - pr_info("%s: set_clock(%d)\n", mmc_hostname(host->mmc), clock); -@@ -1553,17 +1543,17 @@ void bcm2835_sdhost_set_clock(struct bcm - return; - } - -- div = host->cur_clk / clock; -+ div = host->max_clk / clock; - if (div < 2) - div = 2; -- if ((host->cur_clk / div) > clock) -+ if ((host->max_clk / div) > clock) - div++; - div -= 2; - - if (div > SDCDIV_MAX_CDIV) - div = SDCDIV_MAX_CDIV; - -- clock = host->cur_clk / (div + 2); -+ clock = host->max_clk / (div + 2); - host->mmc->actual_clock = clock; - - /* Calibrate some delays */ -@@ -1571,7 +1561,7 @@ void bcm2835_sdhost_set_clock(struct bcm - host->ns_per_fifo_word = (1000000000/clock) * - ((host->mmc->caps & MMC_CAP_4_BIT_DATA) ? 8 : 32); - -- if (clock > host->clock) { -+ if (clock > input_clock) { - /* Save the closest value, to make it easier - to reduce in the event of error */ - host->overclock_50 = (clock/MHZ); -@@ -1597,9 +1587,9 @@ void bcm2835_sdhost_set_clock(struct bcm - bcm2835_sdhost_write(host, host->mmc->actual_clock/2, SDTOUT); - - if (host->debug) -- pr_info("%s: clock=%d -> cur_clk=%d, cdiv=%x (actual clock %d)\n", -- mmc_hostname(host->mmc), host->clock, -- host->cur_clk, host->cdiv, host->mmc->actual_clock); -+ pr_info("%s: clock=%d -> max_clk=%d, cdiv=%x (actual clock %d)\n", -+ mmc_hostname(host->mmc), input_clock, -+ host->max_clk, host->cdiv, host->mmc->actual_clock); - } - - static void bcm2835_sdhost_request(struct mmc_host *mmc, struct mmc_request *mrq) -@@ -1648,13 +1638,6 @@ static void bcm2835_sdhost_request(struc - (mrq->data->blocks > host->pio_limit)) - bcm2835_sdhost_prepare_dma(host, mrq->data); - -- if (host->variable_clock && -- (down_killable(&host->cpufreq_semaphore) != 0)) { -- mrq->cmd->error = -EINTR; -- mmc_request_done(mmc, mrq); -- return; -- } -- - spin_lock_irqsave(&host->lock, flags); - - WARN_ON(host->mrq != NULL); -@@ -1704,52 +1687,6 @@ static void bcm2835_sdhost_request(struc - spin_unlock_irqrestore(&host->lock, flags); - } - --static int bcm2835_sdhost_cpufreq_callback(struct notifier_block *nb, -- unsigned long action, void *data) --{ -- struct cpufreq_freqs *freq = data; -- struct bcm2835_host *host; -- -- host = container_of(nb, struct bcm2835_host, cpufreq_nb); -- -- if (freq->cpu == 0) { -- switch (action) { -- case CPUFREQ_PRECHANGE: -- if (down_killable(&host->cpufreq_semaphore) != 0) -- return NOTIFY_BAD; -- break; -- case CPUFREQ_POSTCHANGE: -- if (freq->new > freq->old) -- host->cur_clk = host->max_clk; -- else -- host->cur_clk = host->min_clk; -- bcm2835_sdhost_set_clock(host); -- up(&host->cpufreq_semaphore); -- break; -- default: -- break; -- } -- } -- return NOTIFY_OK; --} -- --static unsigned int get_core_clock(unsigned int mode) --{ -- struct rpi_firmware *fw = rpi_firmware_get(NULL); -- struct { -- u32 id; -- u32 val; -- } packet; -- int ret; -- -- packet.id = RPI_FIRMWARE_CLOCK_CORE; -- ret = rpi_firmware_property(fw, mode, &packet, sizeof(packet)); -- if (ret) -- return 0; -- -- return packet.val; --} -- - static void bcm2835_sdhost_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) - { - -@@ -1763,16 +1700,13 @@ static void bcm2835_sdhost_set_ios(struc - ios->clock, ios->power_mode, ios->bus_width, - ios->timing, ios->signal_voltage, ios->drv_type); - -- if (ios->clock && !host->cur_clk) -- host->cur_clk = get_core_clock(RPI_FIRMWARE_GET_CLOCK_RATE); -- - spin_lock_irqsave(&host->lock, flags); - - log_event("IOS<", ios->clock, 0); - - if (!ios->clock || ios->clock != host->clock) { -+ bcm2835_sdhost_set_clock(host, ios->clock); - host->clock = ios->clock; -- bcm2835_sdhost_set_clock(host); - } - - /* set bus width */ -@@ -1861,7 +1795,7 @@ static void bcm2835_sdhost_tasklet_finis - host->overclock_50--; - pr_warn("%s: reducing overclock due to errors\n", - mmc_hostname(host->mmc)); -- bcm2835_sdhost_set_clock(host); -+ bcm2835_sdhost_set_clock(host,50*MHZ); - mrq->cmd->error = -EILSEQ; - mrq->cmd->retries = 1; - } -@@ -1879,9 +1813,6 @@ static void bcm2835_sdhost_tasklet_finis - - spin_unlock_irqrestore(&host->lock, flags); - -- if (host->variable_clock) -- up(&host->cpufreq_semaphore); -- - if (terminate_chan) - { - int err = dmaengine_terminate_all(terminate_chan); -@@ -1984,10 +1915,10 @@ int bcm2835_sdhost_add_host(struct bcm28 - setup_timer(&host->timer, bcm2835_sdhost_timeout, - (unsigned long)host); - -- bcm2835_sdhost_init(host); -+ bcm2835_sdhost_init(host, 0); - - ret = request_irq(host->irq, bcm2835_sdhost_irq, 0 /*IRQF_SHARED*/, -- mmc_hostname(mmc), host); -+ mmc_hostname(mmc), host); - if (ret) { - pr_err("%s: failed to request IRQ %d: %d\n", - mmc_hostname(mmc), host->irq, ret); -@@ -2022,7 +1953,6 @@ static int bcm2835_sdhost_probe(struct p - struct bcm2835_host *host; - struct mmc_host *mmc; - const __be32 *addr; -- unsigned int max_clk; - int ret; - - pr_debug("bcm2835_sdhost_probe\n"); -@@ -2132,28 +2062,6 @@ static int bcm2835_sdhost_probe(struct p - if (ret) - goto err; - -- /* Query the core clock frequencies */ -- host->min_clk = get_core_clock(RPI_FIRMWARE_GET_MIN_CLOCK_RATE); -- max_clk = get_core_clock(RPI_FIRMWARE_GET_MAX_CLOCK_RATE); -- if (max_clk != host->max_clk) { -- pr_warn("%s: Expected max clock %d, found %d\n", -- mmc_hostname(mmc), host->max_clk, max_clk); -- host->max_clk = max_clk; -- } -- -- if (host->min_clk != host->max_clk) { -- host->cpufreq_nb.notifier_call = -- bcm2835_sdhost_cpufreq_callback; -- sema_init(&host->cpufreq_semaphore, 1); -- cpufreq_register_notifier(&host->cpufreq_nb, -- CPUFREQ_TRANSITION_NOTIFIER); -- host->variable_clock = 1; -- host->cur_clk = 0; /* Get this later */ -- } else { -- host->variable_clock = 0; -- host->cur_clk = host->max_clk; -- } -- - platform_set_drvdata(pdev, host); - - pr_debug("bcm2835_sdhost_probe -> OK\n"); -@@ -2173,10 +2081,6 @@ static int bcm2835_sdhost_remove(struct - - pr_debug("bcm2835_sdhost_remove\n"); - -- if (host->variable_clock) -- cpufreq_unregister_notifier(&host->cpufreq_nb, -- CPUFREQ_TRANSITION_NOTIFIER); -- - mmc_remove_host(host->mmc); - - bcm2835_sdhost_set_power(host, false); |