diff options
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/mmc/host/Kconfig | 36 | ||||
-rw-r--r-- | drivers/mmc/host/Makefile | 2 | ||||
-rw-r--r-- | drivers/mmc/host/s3cmci.c | 2 | ||||
-rw-r--r-- | drivers/mmc/host/sdhci-of.c | 3 | ||||
-rw-r--r-- | drivers/mmc/host/sdhci-pci.c | 20 | ||||
-rw-r--r-- | drivers/mmc/host/sdhci-s3c.c | 428 | ||||
-rw-r--r-- | drivers/mmc/host/sdhci.c | 52 | ||||
-rw-r--r-- | drivers/mmc/host/sdhci.h | 6 | ||||
-rw-r--r-- | drivers/mmc/host/via-sdmmc.c | 1362 |
9 files changed, 1905 insertions, 6 deletions
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig index 40111a6d8d5..891ef18bd77 100644 --- a/drivers/mmc/host/Kconfig +++ b/drivers/mmc/host/Kconfig @@ -94,6 +94,31 @@ config MMC_SDHCI_PLTFM If unsure, say N. +config MMC_SDHCI_S3C + tristate "SDHCI support on Samsung S3C SoC" + depends on MMC_SDHCI && (PLAT_S3C24XX || PLAT_S3C64XX) + help + This selects the Secure Digital Host Controller Interface (SDHCI) + often referrered to as the HSMMC block in some of the Samsung S3C + range of SoC. + + Note, due to the problems with DMA, the DMA support is only + available with CONFIG_EXPERIMENTAL is selected. + + If you have a controller with this interface, say Y or M here. + + If unsure, say N. + +config MMC_SDHCI_S3C_DMA + bool "DMA support on S3C SDHCI" + depends on MMC_SDHCI_S3C && EXPERIMENTAL + help + Enable DMA support on the Samsung S3C SDHCI glue. The DMA + has proved to be problematic if the controller encounters + certain errors, and thus should be treated with care. + + YMMV. + config MMC_OMAP tristate "TI OMAP Multimedia Card Interface support" depends on ARCH_OMAP @@ -265,3 +290,14 @@ config MMC_CB710 This driver can also be built as a module. If so, the module will be called cb710-mmc. +config MMC_VIA_SDMMC + tristate "VIA SD/MMC Card Reader Driver" + depends on PCI + help + This selects the VIA SD/MMC Card Reader driver, say Y or M here. + VIA provides one multi-functional card reader which integrated into + some motherboards manufactured by VIA. This card reader supports + SD/MMC/SDHC. + If you have a controller with this interface, say Y or M here. + + If unsure, say N. diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile index 79da397c5fe..cf153f62845 100644 --- a/drivers/mmc/host/Makefile +++ b/drivers/mmc/host/Makefile @@ -15,6 +15,7 @@ obj-$(CONFIG_MMC_SDHCI_PCI) += sdhci-pci.o obj-$(CONFIG_MMC_RICOH_MMC) += ricoh_mmc.o obj-$(CONFIG_MMC_SDHCI_OF) += sdhci-of.o obj-$(CONFIG_MMC_SDHCI_PLTFM) += sdhci-pltfm.o +obj-$(CONFIG_MMC_SDHCI_S3C) += sdhci-s3c.o obj-$(CONFIG_MMC_WBSD) += wbsd.o obj-$(CONFIG_MMC_AU1X) += au1xmmc.o obj-$(CONFIG_MMC_OMAP) += omap.o @@ -31,6 +32,7 @@ obj-$(CONFIG_MMC_S3C) += s3cmci.o obj-$(CONFIG_MMC_SDRICOH_CS) += sdricoh_cs.o obj-$(CONFIG_MMC_TMIO) += tmio_mmc.o obj-$(CONFIG_MMC_CB710) += cb710-mmc.o +obj-$(CONFIG_MMC_VIA_SDMMC) += via-sdmmc.o ifeq ($(CONFIG_CB710_DEBUG),y) CFLAGS-cb710-mmc += -DDEBUG diff --git a/drivers/mmc/host/s3cmci.c b/drivers/mmc/host/s3cmci.c index 4eb4f37544a..8c08cd7efa7 100644 --- a/drivers/mmc/host/s3cmci.c +++ b/drivers/mmc/host/s3cmci.c @@ -794,7 +794,7 @@ static void s3cmci_dma_setup(struct s3cmci_host *host, host->mem->start + host->sdidata); if (!setup_ok) { - s3c2410_dma_config(host->dma, 4, 0); + s3c2410_dma_config(host->dma, 4); s3c2410_dma_set_buffdone_fn(host->dma, s3cmci_dma_done_callback); s3c2410_dma_setflags(host->dma, S3C2410_DMAF_AUTOSTART); diff --git a/drivers/mmc/host/sdhci-of.c b/drivers/mmc/host/sdhci-of.c index 128c614d11a..d79fa55c3b8 100644 --- a/drivers/mmc/host/sdhci-of.c +++ b/drivers/mmc/host/sdhci-of.c @@ -250,6 +250,9 @@ static int __devinit sdhci_of_probe(struct of_device *ofdev, host->ops = &sdhci_of_data->ops; } + if (of_get_property(np, "sdhci,1-bit-only", NULL)) + host->quirks |= SDHCI_QUIRK_FORCE_1_BIT_DATA; + clk = of_get_property(np, "clock-frequency", &size); if (clk && size == sizeof(*clk) && *clk) of_host->clock = *clk; diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c index 65be27995d5..2f15cc17d88 100644 --- a/drivers/mmc/host/sdhci-pci.c +++ b/drivers/mmc/host/sdhci-pci.c @@ -284,6 +284,18 @@ static const struct sdhci_pci_fixes sdhci_jmicron = { .resume = jmicron_resume, }; +static int via_probe(struct sdhci_pci_chip *chip) +{ + if (chip->pdev->revision == 0x10) + chip->quirks |= SDHCI_QUIRK_DELAY_AFTER_POWER; + + return 0; +} + +static const struct sdhci_pci_fixes sdhci_via = { + .probe = via_probe, +}; + static const struct pci_device_id pci_ids[] __devinitdata = { { .vendor = PCI_VENDOR_ID_RICOH, @@ -349,6 +361,14 @@ static const struct pci_device_id pci_ids[] __devinitdata = { .driver_data = (kernel_ulong_t)&sdhci_jmicron, }, + { + .vendor = PCI_VENDOR_ID_VIA, + .device = 0x95d0, + .subvendor = PCI_ANY_ID, + .subdevice = PCI_ANY_ID, + .driver_data = (kernel_ulong_t)&sdhci_via, + }, + { /* Generic SD host controller */ PCI_DEVICE_CLASS((PCI_CLASS_SYSTEM_SDHCI << 8), 0xFFFF00) }, diff --git a/drivers/mmc/host/sdhci-s3c.c b/drivers/mmc/host/sdhci-s3c.c new file mode 100644 index 00000000000..50997d2a63e --- /dev/null +++ b/drivers/mmc/host/sdhci-s3c.c @@ -0,0 +1,428 @@ +/* linux/drivers/mmc/host/sdhci-s3c.c + * + * Copyright 2008 Openmoko Inc. + * Copyright 2008 Simtec Electronics + * Ben Dooks <ben@simtec.co.uk> + * http://armlinux.simtec.co.uk/ + * + * SDHCI (HSMMC) support for Samsung SoC + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/delay.h> +#include <linux/dma-mapping.h> +#include <linux/platform_device.h> +#include <linux/clk.h> +#include <linux/io.h> + +#include <linux/mmc/host.h> + +#include <plat/sdhci.h> +#include <plat/regs-sdhci.h> + +#include "sdhci.h" + +#define MAX_BUS_CLK (4) + +/** + * struct sdhci_s3c - S3C SDHCI instance + * @host: The SDHCI host created + * @pdev: The platform device we where created from. + * @ioarea: The resource created when we claimed the IO area. + * @pdata: The platform data for this controller. + * @cur_clk: The index of the current bus clock. + * @clk_io: The clock for the internal bus interface. + * @clk_bus: The clocks that are available for the SD/MMC bus clock. + */ +struct sdhci_s3c { + struct sdhci_host *host; + struct platform_device *pdev; + struct resource *ioarea; + struct s3c_sdhci_platdata *pdata; + unsigned int cur_clk; + + struct clk *clk_io; + struct clk *clk_bus[MAX_BUS_CLK]; +}; + +static inline struct sdhci_s3c *to_s3c(struct sdhci_host *host) +{ + return sdhci_priv(host); +} + +/** + * get_curclk - convert ctrl2 register to clock source number + * @ctrl2: Control2 register value. + */ +static u32 get_curclk(u32 ctrl2) +{ + ctrl2 &= S3C_SDHCI_CTRL2_SELBASECLK_MASK; + ctrl2 >>= S3C_SDHCI_CTRL2_SELBASECLK_SHIFT; + + return ctrl2; +} + +static void sdhci_s3c_check_sclk(struct sdhci_host *host) +{ + struct sdhci_s3c *ourhost = to_s3c(host); + u32 tmp = readl(host->ioaddr + S3C_SDHCI_CONTROL2); + + if (get_curclk(tmp) != ourhost->cur_clk) { + dev_dbg(&ourhost->pdev->dev, "restored ctrl2 clock setting\n"); + + tmp &= ~S3C_SDHCI_CTRL2_SELBASECLK_MASK; + tmp |= ourhost->cur_clk << S3C_SDHCI_CTRL2_SELBASECLK_SHIFT; + writel(tmp, host->ioaddr + 0x80); + } +} + +/** + * sdhci_s3c_get_max_clk - callback to get maximum clock frequency. + * @host: The SDHCI host instance. + * + * Callback to return the maximum clock rate acheivable by the controller. +*/ +static unsigned int sdhci_s3c_get_max_clk(struct sdhci_host *host) +{ + struct sdhci_s3c *ourhost = to_s3c(host); + struct clk *busclk; + unsigned int rate, max; + int clk; + + /* note, a reset will reset the clock source */ + + sdhci_s3c_check_sclk(host); + + for (max = 0, clk = 0; clk < MAX_BUS_CLK; clk++) { + busclk = ourhost->clk_bus[clk]; + if (!busclk) + continue; + + rate = clk_get_rate(busclk); + if (rate > max) + max = rate; + } + + return max; +} + +static unsigned int sdhci_s3c_get_timeout_clk(struct sdhci_host *host) +{ + return sdhci_s3c_get_max_clk(host) / 1000000; +} + +/** + * sdhci_s3c_consider_clock - consider one the bus clocks for current setting + * @ourhost: Our SDHCI instance. + * @src: The source clock index. + * @wanted: The clock frequency wanted. + */ +static unsigned int sdhci_s3c_consider_clock(struct sdhci_s3c *ourhost, + unsigned int src, + unsigned int wanted) +{ + unsigned long rate; + struct clk *clksrc = ourhost->clk_bus[src]; + int div; + + if (!clksrc) + return UINT_MAX; + + rate = clk_get_rate(clksrc); + + for (div = 1; div < 256; div *= 2) { + if ((rate / div) <= wanted) + break; + } + + dev_dbg(&ourhost->pdev->dev, "clk %d: rate %ld, want %d, got %ld\n", + src, rate, wanted, rate / div); + + return (wanted - (rate / div)); +} + +/** + * sdhci_s3c_set_clock - callback on clock change + * @host: The SDHCI host being changed + * @clock: The clock rate being requested. + * + * When the card's clock is going to be changed, look at the new frequency + * and find the best clock source to go with it. +*/ +static void sdhci_s3c_set_clock(struct sdhci_host *host, unsigned int clock) +{ + struct sdhci_s3c *ourhost = to_s3c(host); + unsigned int best = UINT_MAX; + unsigned int delta; + int best_src = 0; + int src; + u32 ctrl; + + /* don't bother if the clock is going off. */ + if (clock == 0) + return; + + for (src = 0; src < MAX_BUS_CLK; src++) { + delta = sdhci_s3c_consider_clock(ourhost, src, clock); + if (delta < best) { + best = delta; + best_src = src; + } + } + + dev_dbg(&ourhost->pdev->dev, + "selected source %d, clock %d, delta %d\n", + best_src, clock, best); + + /* select the new clock source */ + + if (ourhost->cur_clk != best_src) { + struct clk *clk = ourhost->clk_bus[best_src]; + + /* turn clock off to card before changing clock source */ + writew(0, host->ioaddr + SDHCI_CLOCK_CONTROL); + + ourhost->cur_clk = best_src; + host->max_clk = clk_get_rate(clk); + host->timeout_clk = sdhci_s3c_get_timeout_clk(host); + + ctrl = readl(host->ioaddr + S3C_SDHCI_CONTROL2); + ctrl &= ~S3C_SDHCI_CTRL2_SELBASECLK_MASK; + ctrl |= best_src << S3C_SDHCI_CTRL2_SELBASECLK_SHIFT; + writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL2); + } + + /* reconfigure the hardware for new clock rate */ + + { + struct mmc_ios ios; + + ios.clock = clock; + + if (ourhost->pdata->cfg_card) + (ourhost->pdata->cfg_card)(ourhost->pdev, host->ioaddr, + &ios, NULL); + } +} + +static struct sdhci_ops sdhci_s3c_ops = { + .get_max_clock = sdhci_s3c_get_max_clk, + .get_timeout_clock = sdhci_s3c_get_timeout_clk, + .set_clock = sdhci_s3c_set_clock, +}; + +static int __devinit sdhci_s3c_probe(struct platform_device *pdev) +{ + struct s3c_sdhci_platdata *pdata = pdev->dev.platform_data; + struct device *dev = &pdev->dev; + struct sdhci_host *host; + struct sdhci_s3c *sc; + struct resource *res; + int ret, irq, ptr, clks; + + if (!pdata) { + dev_err(dev, "no device data specified\n"); + return -ENOENT; + } + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + dev_err(dev, "no irq specified\n"); + return irq; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(dev, "no memory specified\n"); + return -ENOENT; + } + + host = sdhci_alloc_host(dev, sizeof(struct sdhci_s3c)); + if (IS_ERR(host)) { + dev_err(dev, "sdhci_alloc_host() failed\n"); + return PTR_ERR(host); + } + + sc = sdhci_priv(host); + + sc->host = host; + sc->pdev = pdev; + sc->pdata = pdata; + + platform_set_drvdata(pdev, host); + + sc->clk_io = clk_get(dev, "hsmmc"); + if (IS_ERR(sc->clk_io)) { + dev_err(dev, "failed to get io clock\n"); + ret = PTR_ERR(sc->clk_io); + goto err_io_clk; + } + + /* enable the local io clock and keep it running for the moment. */ + clk_enable(sc->clk_io); + + for (clks = 0, ptr = 0; ptr < MAX_BUS_CLK; ptr++) { + struct clk *clk; + char *name = pdata->clocks[ptr]; + + if (name == NULL) + continue; + + clk = clk_get(dev, name); + if (IS_ERR(clk)) { + dev_err(dev, "failed to get clock %s\n", name); + continue; + } + + clks++; + sc->clk_bus[ptr] = clk; + clk_enable(clk); + + dev_info(dev, "clock source %d: %s (%ld Hz)\n", + ptr, name, clk_get_rate(clk)); + } + + if (clks == 0) { + dev_err(dev, "failed to find any bus clocks\n"); + ret = -ENOENT; + goto err_no_busclks; + } + + sc->ioarea = request_mem_region(res->start, resource_size(res), + mmc_hostname(host->mmc)); + if (!sc->ioarea) { + dev_err(dev, "failed to reserve register area\n"); + ret = -ENXIO; + goto err_req_regs; + } + + host->ioaddr = ioremap_nocache(res->start, resource_size(res)); + if (!host->ioaddr) { + dev_err(dev, "failed to map registers\n"); + ret = -ENXIO; + goto err_req_regs; + } + + /* Ensure we have minimal gpio selected CMD/CLK/Detect */ + if (pdata->cfg_gpio) + pdata->cfg_gpio(pdev, pdata->max_width); + + host->hw_name = "samsung-hsmmc"; + host->ops = &sdhci_s3c_ops; + host->quirks = 0; + host->irq = irq; + + /* Setup quirks for the controller */ + + /* Currently with ADMA enabled we are getting some length + * interrupts that are not being dealt with, do disable + * ADMA until this is sorted out. */ + host->quirks |= SDHCI_QUIRK_BROKEN_ADMA; + host->quirks |= SDHCI_QUIRK_32BIT_ADMA_SIZE; + +#ifndef CONFIG_MMC_SDHCI_S3C_DMA + + /* we currently see overruns on errors, so disable the SDMA + * support as well. */ + host->quirks |= SDHCI_QUIRK_BROKEN_DMA; + + /* PIO currently has problems with multi-block IO */ + host->quirks |= SDHCI_QUIRK_NO_MULTIBLOCK; + +#endif /* CONFIG_MMC_SDHCI_S3C_DMA */ + + /* It seems we do not get an DATA transfer complete on non-busy + * transfers, not sure if this is a problem with this specific + * SDHCI block, or a missing configuration that needs to be set. */ + host->quirks |= SDHCI_QUIRK_NO_BUSY_IRQ; + + host->quirks |= (SDHCI_QUIRK_32BIT_DMA_ADDR | + SDHCI_QUIRK_32BIT_DMA_SIZE); + + ret = sdhci_add_host(host); + if (ret) { + dev_err(dev, "sdhci_add_host() failed\n"); + goto err_add_host; + } + + return 0; + + err_add_host: + release_resource(sc->ioarea); + kfree(sc->ioarea); + + err_req_regs: + for (ptr = 0; ptr < MAX_BUS_CLK; ptr++) { + clk_disable(sc->clk_bus[ptr]); + clk_put(sc->clk_bus[ptr]); + } + + err_no_busclks: + clk_disable(sc->clk_io); + clk_put(sc->clk_io); + + err_io_clk: + sdhci_free_host(host); + + return ret; +} + +static int __devexit sdhci_s3c_remove(struct platform_device *pdev) +{ + return 0; +} + +#ifdef CONFIG_PM + +static int sdhci_s3c_suspend(struct platform_device *dev, pm_message_t pm) +{ + struct sdhci_host *host = platform_get_drvdata(dev); + + sdhci_suspend_host(host, pm); + return 0; +} + +static int sdhci_s3c_resume(struct platform_device *dev) +{ + struct sdhci_host *host = platform_get_drvdata(dev); + + sdhci_resume_host(host); + return 0; +} + +#else +#define sdhci_s3c_suspend NULL +#define sdhci_s3c_resume NULL +#endif + +static struct platform_driver sdhci_s3c_driver = { + .probe = sdhci_s3c_probe, + .remove = __devexit_p(sdhci_s3c_remove), + .suspend = sdhci_s3c_suspend, + .resume = sdhci_s3c_resume, + .driver = { + .owner = THIS_MODULE, + .name = "s3c-sdhci", + }, +}; + +static int __init sdhci_s3c_init(void) +{ + return platform_driver_register(&sdhci_s3c_driver); +} + +static void __exit sdhci_s3c_exit(void) +{ + platform_driver_unregister(&sdhci_s3c_driver); +} + +module_init(sdhci_s3c_init); +module_exit(sdhci_s3c_exit); + +MODULE_DESCRIPTION("Samsung SDHCI (HSMMC) glue"); +MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:s3c-sdhci"); diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 35789c6edc1..6779b4ecab1 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -584,7 +584,7 @@ static u8 sdhci_calc_timeout(struct sdhci_host *host, struct mmc_data *data) * longer to time out, but that's much better than having a too-short * timeout value. */ - if ((host->quirks & SDHCI_QUIRK_BROKEN_TIMEOUT_VAL)) + if (host->quirks & SDHCI_QUIRK_BROKEN_TIMEOUT_VAL) return 0xE; /* timeout in us */ @@ -1051,12 +1051,19 @@ static void sdhci_set_power(struct sdhci_host *host, unsigned short power) * At least the Marvell CaFe chip gets confused if we set the voltage * and set turn on power at the same time, so set the voltage first. */ - if ((host->quirks & SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER)) + if (host->quirks & SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER) sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL); pwr |= SDHCI_POWER_ON; sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL); + + /* + * Some controllers need an extra 10ms delay of 10ms before they + * can apply clock after applying power + */ + if (host->quirks & SDHCI_QUIRK_DELAY_AFTER_POWER) + mdelay(10); } /*****************************************************************************\ @@ -1382,6 +1389,35 @@ static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask) sdhci_finish_command(host); } +#ifdef DEBUG +static void sdhci_show_adma_error(struct sdhci_host *host) +{ + const char *name = mmc_hostname(host->mmc); + u8 *desc = host->adma_desc; + __le32 *dma; + __le16 *len; + u8 attr; + + sdhci_dumpregs(host); + + while (true) { + dma = (__le32 *)(desc + 4); + len = (__le16 *)(desc + 2); + attr = *desc; + + DBG("%s: %p: DMA 0x%08x, LEN 0x%04x, Attr=0x%02x\n", + name, desc, le32_to_cpu(*dma), le16_to_cpu(*len), attr); + + desc += 8; + + if (attr & 2) + break; + } +} +#else +static void sdhci_show_adma_error(struct sdhci_host *host) { } +#endif + static void sdhci_data_irq(struct sdhci_host *host, u32 intmask) { BUG_ON(intmask == 0); @@ -1411,8 +1447,11 @@ static void sdhci_data_irq(struct sdhci_host *host, u32 intmask) host->data->error = -ETIMEDOUT; else if (intmask & (SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_END_BIT)) host->data->error = -EILSEQ; - else if (intmask & SDHCI_INT_ADMA_ERROR) + else if (intmask & SDHCI_INT_ADMA_ERROR) { + printk(KERN_ERR "%s: ADMA error\n", mmc_hostname(host->mmc)); + sdhci_show_adma_error(host); host->data->error = -EIO; + } if (host->data->error) sdhci_finish_data(host); @@ -1729,7 +1768,10 @@ int sdhci_add_host(struct sdhci_host *host) mmc->ops = &sdhci_ops; mmc->f_min = host->max_clk / 256; mmc->f_max = host->max_clk; - mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SDIO_IRQ; + mmc->caps = MMC_CAP_SDIO_IRQ; + + if (!(host->quirks & SDHCI_QUIRK_FORCE_1_BIT_DATA)) + mmc->caps |= MMC_CAP_4_BIT_DATA; if (caps & SDHCI_CAN_DO_HISPD) mmc->caps |= MMC_CAP_SD_HIGHSPEED; @@ -1802,7 +1844,7 @@ int sdhci_add_host(struct sdhci_host *host) /* * Maximum block count. */ - mmc->max_blk_count = 65535; + mmc->max_blk_count = (host->quirks & SDHCI_QUIRK_NO_MULTIBLOCK) ? 1 : 65535; /* * Init tasklets. diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h index 2de08349c3c..831ddf7dcb4 100644 --- a/drivers/mmc/host/sdhci.h +++ b/drivers/mmc/host/sdhci.h @@ -226,6 +226,12 @@ struct sdhci_host { #define SDHCI_QUIRK_RESTORE_IRQS_AFTER_RESET (1<<19) /* Controller has to be forced to use block size of 2048 bytes */ #define SDHCI_QUIRK_FORCE_BLK_SZ_2048 (1<<20) +/* Controller cannot do multi-block transfers */ +#define SDHCI_QUIRK_NO_MULTIBLOCK (1<<21) +/* Controller can only handle 1-bit data transfers */ +#define SDHCI_QUIRK_FORCE_1_BIT_DATA (1<<22) +/* Controller needs 10ms delay between applying power and clock */ +#define SDHCI_QUIRK_DELAY_AFTER_POWER (1<<23) int irq; /* Device IRQ */ void __iomem * ioaddr; /* Mapped address */ diff --git a/drivers/mmc/host/via-sdmmc.c b/drivers/mmc/host/via-sdmmc.c new file mode 100644 index 00000000000..632858a9437 --- /dev/null +++ b/drivers/mmc/host/via-sdmmc.c @@ -0,0 +1,1362 @@ +/* + * drivers/mmc/host/via-sdmmc.c - VIA SD/MMC Card Reader driver + * Copyright (c) 2008, VIA Technologies Inc. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + */ + +#include <linux/pci.h> +#include <linux/dma-mapping.h> +#include <linux/highmem.h> +#include <linux/delay.h> + +#include <linux/mmc/host.h> + +#define DRV_NAME "via_sdmmc" + +#define PCI_DEVICE_ID_VIA_9530 0x9530 + +#define VIA_CRDR_SDC_OFF 0x200 +#define VIA_CRDR_DDMA_OFF 0x400 +#define VIA_CRDR_PCICTRL_OFF 0x600 + +#define VIA_CRDR_MIN_CLOCK 375000 +#define VIA_CRDR_MAX_CLOCK 48000000 + +/* + * PCI registers + */ + +#define VIA_CRDR_PCI_WORK_MODE 0x40 +#define VIA_CRDR_PCI_DBG_MODE 0x41 + +/* + * SDC MMIO Registers + */ + +#define VIA_CRDR_SDCTRL 0x0 +#define VIA_CRDR_SDCTRL_START 0x01 +#define VIA_CRDR_SDCTRL_WRITE 0x04 +#define VIA_CRDR_SDCTRL_SINGLE_WR 0x10 +#define VIA_CRDR_SDCTRL_SINGLE_RD 0x20 +#define VIA_CRDR_SDCTRL_MULTI_WR 0x30 +#define VIA_CRDR_SDCTRL_MULTI_RD 0x40 +#define VIA_CRDR_SDCTRL_STOP 0x70 + +#define VIA_CRDR_SDCTRL_RSP_NONE 0x0 +#define VIA_CRDR_SDCTRL_RSP_R1 0x10000 +#define VIA_CRDR_SDCTRL_RSP_R2 0x20000 +#define VIA_CRDR_SDCTRL_RSP_R3 0x30000 +#define VIA_CRDR_SDCTRL_RSP_R1B 0x90000 + +#define VIA_CRDR_SDCARG 0x4 + +#define VIA_CRDR_SDBUSMODE 0x8 +#define VIA_CRDR_SDMODE_4BIT 0x02 +#define VIA_CRDR_SDMODE_CLK_ON 0x40 + +#define VIA_CRDR_SDBLKLEN 0xc +/* + * Bit 0 -Bit 10 : Block length. So, the maximum block length should be 2048. + * Bit 11 - Bit 13 : Reserved. + * GPIDET : Select GPI pin to detect card, GPI means CR_CD# in top design. + * INTEN : Enable SD host interrupt. + * Bit 16 - Bit 31 : Block count. So, the maximun block count should be 65536. + */ +#define VIA_CRDR_SDBLKLEN_GPIDET 0x2000 +#define VIA_CRDR_SDBLKLEN_INTEN 0x8000 +#define VIA_CRDR_MAX_BLOCK_COUNT 65536 +#define VIA_CRDR_MAX_BLOCK_LENGTH 2048 + +#define VIA_CRDR_SDRESP0 0x10 +#define VIA_CRDR_SDRESP1 0x14 +#define VIA_CRDR_SDRESP2 0x18 +#define VIA_CRDR_SDRESP3 0x1c + +#define VIA_CRDR_SDCURBLKCNT 0x20 + +#define VIA_CRDR_SDINTMASK 0x24 +/* + * MBDIE : Multiple Blocks transfer Done Interrupt Enable + * BDDIE : Block Data transfer Done Interrupt Enable + * CIRIE : Card Insertion or Removal Interrupt Enable + * CRDIE : Command-Response transfer Done Interrupt Enable + * CRTOIE : Command-Response response TimeOut Interrupt Enable + * ASCRDIE : Auto Stop Command-Response transfer Done Interrupt Enable + * DTIE : Data access Timeout Interrupt Enable + * SCIE : reSponse CRC error Interrupt Enable + * RCIE : Read data CRC error Interrupt Enable + * WCIE : Write data CRC error Interrupt Enable + */ +#define VIA_CRDR_SDINTMASK_MBDIE 0x10 +#define VIA_CRDR_SDINTMASK_BDDIE 0x20 +#define VIA_CRDR_SDINTMASK_CIRIE 0x80 +#define VIA_CRDR_SDINTMASK_CRDIE 0x200 +#define VIA_CRDR_SDINTMASK_CRTOIE 0x400 +#define VIA_CRDR_SDINTMASK_ASCRDIE 0x800 +#define VIA_CRDR_SDINTMASK_DTIE 0x1000 +#define VIA_CRDR_SDINTMASK_SCIE 0x2000 +#define VIA_CRDR_SDINTMASK_RCIE 0x4000 +#define VIA_CRDR_SDINTMASK_WCIE 0x8000 + +#define VIA_CRDR_SDACTIVE_INTMASK \ + (VIA_CRDR_SDINTMASK_MBDIE | VIA_CRDR_SDINTMASK_CIRIE \ + | VIA_CRDR_SDINTMASK_CRDIE | VIA_CRDR_SDINTMASK_CRTOIE \ + | VIA_CRDR_SDINTMASK_DTIE | VIA_CRDR_SDINTMASK_SCIE \ + | VIA_CRDR_SDINTMASK_RCIE | VIA_CRDR_SDINTMASK_WCIE) + +#define VIA_CRDR_SDSTATUS 0x28 +/* + * CECC : Reserved + * WP : SD card Write Protect status + * SLOTD : Reserved + * SLOTG : SD SLOT status(Gpi pin status) + * MBD : Multiple Blocks transfer Done interrupt status + * BDD : Block Data transfer Done interrupt status + * CD : Reserved + * CIR : Card Insertion or Removal interrupt detected on GPI pin + * IO : Reserved + * CRD : Command-Response transfer Done interrupt status + * CRTO : Command-Response response TimeOut interrupt status + * ASCRDIE : Auto Stop Command-Response transfer Done interrupt status + * DT : Data access Timeout interrupt status + * SC : reSponse CRC error interrupt status + * RC : Read data CRC error interrupt status + * WC : Write data CRC error interrupt status + */ +#define VIA_CRDR_SDSTS_CECC 0x01 +#define VIA_CRDR_SDSTS_WP 0x02 +#define VIA_CRDR_SDSTS_SLOTD 0x04 +#define VIA_CRDR_SDSTS_SLOTG 0x08 +#define VIA_CRDR_SDSTS_MBD 0x10 +#define VIA_CRDR_SDSTS_BDD 0x20 +#define VIA_CRDR_SDSTS_CD 0x40 +#define VIA_CRDR_SDSTS_CIR 0x80 +#define VIA_CRDR_SDSTS_IO 0x100 +#define VIA_CRDR_SDSTS_CRD 0x200 +#define VIA_CRDR_SDSTS_CRTO 0x400 +#define VIA_CRDR_SDSTS_ASCRDIE 0x800 +#define VIA_CRDR_SDSTS_DT 0x1000 +#define VIA_CRDR_SDSTS_SC 0x2000 +#define VIA_CRDR_SDSTS_RC 0x4000 +#define VIA_CRDR_SDSTS_WC 0x8000 + +#define VIA_CRDR_SDSTS_IGN_MASK\ + (VIA_CRDR_SDSTS_BDD | VIA_CRDR_SDSTS_ASCRDIE | VIA_CRDR_SDSTS_IO) +#define VIA_CRDR_SDSTS_INT_MASK \ + (VIA_CRDR_SDSTS_MBD | VIA_CRDR_SDSTS_BDD | VIA_CRDR_SDSTS_CD \ + | VIA_CRDR_SDSTS_CIR | VIA_CRDR_SDSTS_IO | VIA_CRDR_SDSTS_CRD \ + | VIA_CRDR_SDSTS_CRTO | VIA_CRDR_SDSTS_ASCRDIE | VIA_CRDR_SDSTS_DT \ + | VIA_CRDR_SDSTS_SC | VIA_CRDR_SDSTS_RC | VIA_CRDR_SDSTS_WC) +#define VIA_CRDR_SDSTS_W1C_MASK \ + (VIA_CRDR_SDSTS_CECC | VIA_CRDR_SDSTS_MBD | VIA_CRDR_SDSTS_BDD \ + | VIA_CRDR_SDSTS_CD | VIA_CRDR_SDSTS_CIR | VIA_CRDR_SDSTS_CRD \ + | VIA_CRDR_SDSTS_CRTO | VIA_CRDR_SDSTS_ASCRDIE | VIA_CRDR_SDSTS_DT \ + | VIA_CRDR_SDSTS_SC | VIA_CRDR_SDSTS_RC | VIA_CRDR_SDSTS_WC) +#define VIA_CRDR_SDSTS_CMD_MASK \ + (VIA_CRDR_SDSTS_CRD | VIA_CRDR_SDSTS_CRTO | VIA_CRDR_SDSTS_SC) +#define VIA_CRDR_SDSTS_DATA_MASK\ + (VIA_CRDR_SDSTS_MBD | VIA_CRDR_SDSTS_DT \ + | VIA_CRDR_SDSTS_RC | VIA_CRDR_SDSTS_WC) + +#define VIA_CRDR_SDSTATUS2 0x2a +/* + * CFE : Enable SD host automatic Clock FReezing + */ +#define VIA_CRDR_SDSTS_CFE 0x80 + +#define VIA_CRDR_SDRSPTMO 0x2C + +#define VIA_CRDR_SDCLKSEL 0x30 + +#define VIA_CRDR_SDEXTCTRL 0x34 +#define VIS_CRDR_SDEXTCTRL_AUTOSTOP_SD 0x01 +#define VIS_CRDR_SDEXTCTRL_SHIFT_9 0x02 +#define VIS_CRDR_SDEXTCTRL_MMC_8BIT 0x04 +#define VIS_CRDR_SDEXTCTRL_RELD_BLK 0x08 +#define VIS_CRDR_SDEXTCTRL_BAD_CMDA 0x10 +#define VIS_CRDR_SDEXTCTRL_BAD_DATA 0x20 +#define VIS_CRDR_SDEXTCTRL_AUTOSTOP_SPI 0x40 +#define VIA_CRDR_SDEXTCTRL_HISPD 0x80 +/* 0x38-0xFF reserved */ + +/* + * Data DMA Control Registers + */ + +#define VIA_CRDR_DMABASEADD 0x0 +#define VIA_CRDR_DMACOUNTER 0x4 + +#define VIA_CRDR_DMACTRL 0x8 +/* + * DIR :Transaction Direction + * 0 : From card to memory + * 1 : From memory to card + */ +#define VIA_CRDR_DMACTRL_DIR 0x100 +#define VIA_CRDR_DMACTRL_ENIRQ 0x10000 +#define VIA_CRDR_DMACTRL_SFTRST 0x1000000 + +#define VIA_CRDR_DMASTS 0xc + +#define VIA_CRDR_DMASTART 0x10 +/*0x14-0xFF reserved*/ + +/* + * PCI Control Registers + */ + +/*0x0 - 0x1 reserved*/ +#define VIA_CRDR_PCICLKGATT 0x2 +/* + * SFTRST : + * 0 : Soft reset all the controller and it will be de-asserted automatically + * 1 : Soft reset is de-asserted + */ +#define VIA_CRDR_PCICLKGATT_SFTRST 0x01 +/* + * 3V3 : Pad power select + * 0 : 1.8V + * 1 : 3.3V + * NOTE : No mater what the actual value should be, this bit always + * read as 0. This is a hardware bug. + */ +#define VIA_CRDR_PCICLKGATT_3V3 0x10 +/* + * PAD_PWRON : Pad Power on/off select + * 0 : Power off + * 1 : Power on + * NOTE : No mater what the actual value should be, this bit always + * read as 0. This is a hardware bug. + */ +#define VIA_CRDR_PCICLKGATT_PAD_PWRON 0x20 + +#define VIA_CRDR_PCISDCCLK 0x5 + +#define VIA_CRDR_PCIDMACLK 0x7 +#define VIA_CRDR_PCIDMACLK_SDC 0x2 + +#define VIA_CRDR_PCIINTCTRL 0x8 +#define VIA_CRDR_PCIINTCTRL_SDCIRQEN 0x04 + +#define VIA_CRDR_PCIINTSTATUS 0x9 +#define VIA_CRDR_PCIINTSTATUS_SDC 0x04 + +#define VIA_CRDR_PCITMOCTRL 0xa +#define VIA_CRDR_PCITMOCTRL_NO 0x0 +#define VIA_CRDR_PCITMOCTRL_32US 0x1 +#define VIA_CRDR_PCITMOCTRL_256US 0x2 +#define VIA_CRDR_PCITMOCTRL_1024US 0x3 +#define VIA_CRDR_PCITMOCTRL_256MS 0x4 +#define VIA_CRDR_PCITMOCTRL_512MS 0x5 +#define VIA_CRDR_PCITMOCTRL_1024MS 0x6 + +/*0xB-0xFF reserved*/ + +enum PCI_HOST_CLK_CONTROL { + PCI_CLK_375K = 0x03, + PCI_CLK_8M = 0x04, + PCI_CLK_12M = 0x00, + PCI_CLK_16M = 0x05, + PCI_CLK_24M = 0x01, + PCI_CLK_33M = 0x06, + PCI_CLK_48M = 0x02 +}; + +struct sdhcreg { + u32 sdcontrol_reg; + u32 sdcmdarg_reg; + u32 sdbusmode_reg; + u32 sdblklen_reg; + u32 sdresp_reg[4]; + u32 sdcurblkcnt_reg; + u32 sdintmask_reg; + u32 sdstatus_reg; + u32 sdrsptmo_reg; + u32 sdclksel_reg; + u32 sdextctrl_reg; +}; + +struct pcictrlreg { + u8 reserve[2]; + u8 pciclkgat_reg; + u8 pcinfcclk_reg; + u8 pcimscclk_reg; + u8 pcisdclk_reg; + u8 pcicaclk_reg; + u8 pcidmaclk_reg; + u8 pciintctrl_reg; + u8 pciintstatus_reg; + u8 pcitmoctrl_reg; + u8 Resv; +}; + +struct via_crdr_mmc_host { + struct mmc_host *mmc; + struct mmc_request *mrq; + struct mmc_command *cmd; + struct mmc_data *data; + + void __iomem *mmiobase; + void __iomem *sdhc_mmiobase; + void __iomem *ddma_mmiobase; + void __iomem *pcictrl_mmiobase; + + struct pcictrlreg pm_pcictrl_reg; + struct sdhcreg pm_sdhc_reg; + + struct work_struct carddet_work; + struct tasklet_struct finish_tasklet; + + struct timer_list timer; + spinlock_t lock; + u8 power; + int reject; + unsigned int quirks; +}; + +/* some devices need a very long delay for power to stabilize */ +#define VIA_CRDR_QUIRK_300MS_PWRDELAY 0x0001 + +static struct pci_device_id via_ids[] = { + {PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_9530, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0,}, + {0,} +}; + +MODULE_DEVICE_TABLE(pci, via_ids); + +static void via_print_sdchc(struct via_crdr_mmc_host *host) +{ + void __iomem *addrbase = host->sdhc_mmiobase; + + pr_debug("SDC MMIO Registers:\n"); + pr_debug("SDCONTROL=%08x, SDCMDARG=%08x, SDBUSMODE=%08x\n", + readl(addrbase + VIA_CRDR_SDCTRL), + readl(addrbase + VIA_CRDR_SDCARG), + readl(addrbase + VIA_CRDR_SDBUSMODE)); + pr_debug("SDBLKLEN=%08x, SDCURBLKCNT=%08x, SDINTMASK=%08x\n", + readl(addrbase + VIA_CRDR_SDBLKLEN), + readl(addrbase + VIA_CRDR_SDCURBLKCNT), + readl(addrbase + VIA_CRDR_SDINTMASK)); + pr_debug("SDSTATUS=%08x, SDCLKSEL=%08x, SDEXTCTRL=%08x\n", + readl(addrbase + VIA_CRDR_SDSTATUS), + readl(addrbase + VIA_CRDR_SDCLKSEL), + readl(addrbase + VIA_CRDR_SDEXTCTRL)); +} + +static void via_print_pcictrl(struct via_crdr_mmc_host *host) +{ + void __iomem *addrbase = host->pcictrl_mmiobase; + + pr_debug("PCI Control Registers:\n"); + pr_debug("PCICLKGATT=%02x, PCISDCCLK=%02x, PCIDMACLK=%02x\n", + readb(addrbase + VIA_CRDR_PCICLKGATT), + readb(addrbase + VIA_CRDR_PCISDCCLK), + readb(addrbase + VIA_CRDR_PCIDMACLK)); + pr_debug("PCIINTCTRL=%02x, PCIINTSTATUS=%02x\n", + readb(addrbase + VIA_CRDR_PCIINTCTRL), + readb(addrbase + VIA_CRDR_PCIINTSTATUS)); +} + +static void via_save_pcictrlreg(struct via_crdr_mmc_host *host) +{ + struct pcictrlreg *pm_pcictrl_reg; + void __iomem *addrbase; + + pm_pcictrl_reg = &(host->pm_pcictrl_reg); + addrbase = host->pcictrl_mmiobase; + + pm_pcictrl_reg->pciclkgat_reg = readb(addrbase + VIA_CRDR_PCICLKGATT); + pm_pcictrl_reg->pciclkgat_reg |= + VIA_CRDR_PCICLKGATT_3V3 | VIA_CRDR_PCICLKGATT_PAD_PWRON; + pm_pcictrl_reg->pcisdclk_reg = readb(addrbase + VIA_CRDR_PCISDCCLK); + pm_pcictrl_reg->pcidmaclk_reg = readb(addrbase + VIA_CRDR_PCIDMACLK); + pm_pcictrl_reg->pciintctrl_reg = readb(addrbase + VIA_CRDR_PCIINTCTRL); + pm_pcictrl_reg->pciintstatus_reg = + readb(addrbase + VIA_CRDR_PCIINTSTATUS); + pm_pcictrl_reg->pcitmoctrl_reg = readb(addrbase + VIA_CRDR_PCITMOCTRL); +} + +static void via_restore_pcictrlreg(struct via_crdr_mmc_host *host) +{ + struct pcictrlreg *pm_pcictrl_reg; + void __iomem *addrbase; + + pm_pcictrl_reg = &(host->pm_pcictrl_reg); + addrbase = host->pcictrl_mmiobase; + + writeb(pm_pcictrl_reg->pciclkgat_reg, addrbase + VIA_CRDR_PCICLKGATT); + writeb(pm_pcictrl_reg->pcisdclk_reg, addrbase + VIA_CRDR_PCISDCCLK); + writeb(pm_pcictrl_reg->pcidmaclk_reg, addrbase + VIA_CRDR_PCIDMACLK); + writeb(pm_pcictrl_reg->pciintctrl_reg, addrbase + VIA_CRDR_PCIINTCTRL); + writeb(pm_pcictrl_reg->pciintstatus_reg, + addrbase + VIA_CRDR_PCIINTSTATUS); + writeb(pm_pcictrl_reg->pcitmoctrl_reg, addrbase + VIA_CRDR_PCITMOCTRL); +} + +static void via_save_sdcreg(struct via_crdr_mmc_host *host) +{ + struct sdhcreg *pm_sdhc_reg; + void __iomem *addrbase; + + pm_sdhc_reg = &(host->pm_sdhc_reg); + addrbase = host->sdhc_mmiobase; + + pm_sdhc_reg->sdcontrol_reg = readl(addrbase + VIA_CRDR_SDCTRL); + pm_sdhc_reg->sdcmdarg_reg = readl(addrbase + VIA_CRDR_SDCARG); + pm_sdhc_reg->sdbusmode_reg = readl(addrbase + VIA_CRDR_SDBUSMODE); + pm_sdhc_reg->sdblklen_reg = readl(addrbase + VIA_CRDR_SDBLKLEN); + pm_sdhc_reg->sdcurblkcnt_reg = readl(addrbase + VIA_CRDR_SDCURBLKCNT); + pm_sdhc_reg->sdintmask_reg = readl(addrbase + VIA_CRDR_SDINTMASK); + pm_sdhc_reg->sdstatus_reg = readl(addrbase + VIA_CRDR_SDSTATUS); + pm_sdhc_reg->sdrsptmo_reg = readl(addrbase + VIA_CRDR_SDRSPTMO); + pm_sdhc_reg->sdclksel_reg = readl(addrbase + VIA_CRDR_SDCLKSEL); + pm_sdhc_reg->sdextctrl_reg = readl(addrbase + VIA_CRDR_SDEXTCTRL); +} + +static void via_restore_sdcreg(struct via_crdr_mmc_host *host) +{ + struct sdhcreg *pm_sdhc_reg; + void __iomem *addrbase; + + pm_sdhc_reg = &(host->pm_sdhc_reg); + addrbase = host->sdhc_mmiobase; + + writel(pm_sdhc_reg->sdcontrol_reg, addrbase + VIA_CRDR_SDCTRL); + writel(pm_sdhc_reg->sdcmdarg_reg, addrbase + VIA_CRDR_SDCARG); + writel(pm_sdhc_reg->sdbusmode_reg, addrbase + VIA_CRDR_SDBUSMODE); + writel(pm_sdhc_reg->sdblklen_reg, addrbase + VIA_CRDR_SDBLKLEN); + writel(pm_sdhc_reg->sdcurblkcnt_reg, addrbase + VIA_CRDR_SDCURBLKCNT); + writel(pm_sdhc_reg->sdintmask_reg, addrbase + VIA_CRDR_SDINTMASK); + writel(pm_sdhc_reg->sdstatus_reg, addrbase + VIA_CRDR_SDSTATUS); + writel(pm_sdhc_reg->sdrsptmo_reg, addrbase + VIA_CRDR_SDRSPTMO); + writel(pm_sdhc_reg->sdclksel_reg, addrbase + VIA_CRDR_SDCLKSEL); + writel(pm_sdhc_reg->sdextctrl_reg, addrbase + VIA_CRDR_SDEXTCTRL); +} + +static void via_pwron_sleep(struct via_crdr_mmc_host *sdhost) +{ + if (sdhost->quirks & VIA_CRDR_QUIRK_300MS_PWRDELAY) + msleep(300); + else + msleep(3); +} + +static void via_set_ddma(struct via_crdr_mmc_host *host, + dma_addr_t dmaaddr, u32 count, int dir, int enirq) +{ + void __iomem *addrbase; + u32 ctrl_data = 0; + + if (enirq) + ctrl_data |= VIA_CRDR_DMACTRL_ENIRQ; + + if (dir) + ctrl_data |= VIA_CRDR_DMACTRL_DIR; + + addrbase = host->ddma_mmiobase; + + writel(dmaaddr, addrbase + VIA_CRDR_DMABASEADD); + writel(count, addrbase + VIA_CRDR_DMACOUNTER); + writel(ctrl_data, addrbase + VIA_CRDR_DMACTRL); + writel(0x01, addrbase + VIA_CRDR_DMASTART); + + /* It seems that our DMA can not work normally with 375kHz clock */ + /* FIXME: don't brute-force 8MHz but use PIO at 375kHz !! */ + addrbase = host->pcictrl_mmiobase; + if (readb(addrbase + VIA_CRDR_PCISDCCLK) == PCI_CLK_375K) { + dev_info(host->mmc->parent, "forcing card speed to 8MHz\n"); + writeb(PCI_CLK_8M, addrbase + VIA_CRDR_PCISDCCLK); + } +} + +static void via_sdc_preparedata(struct via_crdr_mmc_host *host, + struct mmc_data *data) +{ + void __iomem *addrbase; + u32 blk_reg; + int count; + + WARN_ON(host->data); + + /* Sanity checks */ + BUG_ON(data->blksz > host->mmc->max_blk_size); + BUG_ON(data->blocks > host->mmc->max_blk_count); + + host->data = data; + + count = dma_map_sg(mmc_dev(host->mmc), data->sg, data->sg_len, + ((data->flags & MMC_DATA_READ) ? + PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE)); + BUG_ON(count != 1); + + via_set_ddma(host, sg_dma_address(data->sg), sg_dma_len(data->sg), + (data->flags & MMC_DATA_WRITE) ? 1 : 0, 1); + + addrbase = host->sdhc_mmiobase; + + blk_reg = data->blksz - 1; + blk_reg |= VIA_CRDR_SDBLKLEN_GPIDET | VIA_CRDR_SDBLKLEN_INTEN; + blk_reg |= (data->blocks) << 16; + + writel(blk_reg, addrbase + VIA_CRDR_SDBLKLEN); +} + +static void via_sdc_get_response(struct via_crdr_mmc_host *host, + struct mmc_command *cmd) +{ + void __iomem *addrbase = host->sdhc_mmiobase; + u32 dwdata0 = readl(addrbase + VIA_CRDR_SDRESP0); + u32 dwdata1 = readl(addrbase + VIA_CRDR_SDRESP1); + u32 dwdata2 = readl(addrbase + VIA_CRDR_SDRESP2); + u32 dwdata3 = readl(addrbase + VIA_CRDR_SDRESP3); + + if (cmd->flags & MMC_RSP_136) { + cmd->resp[0] = ((u8) (dwdata1)) | + (((u8) (dwdata0 >> 24)) << 8) | + (((u8) (dwdata0 >> 16)) << 16) | + (((u8) (dwdata0 >> 8)) << 24); + + cmd->resp[1] = ((u8) (dwdata2)) | + (((u8) (dwdata1 >> 24)) << 8) | + (((u8) (dwdata1 >> 16)) << 16) | + (((u8) (dwdata1 >> 8)) << 24); + + cmd->resp[2] = ((u8) (dwdata3)) | + (((u8) (dwdata2 >> 24)) << 8) | + (((u8) (dwdata2 >> 16)) << 16) | + (((u8) (dwdata2 >> 8)) << 24); + + cmd->resp[3] = 0xff | + ((((u8) (dwdata3 >> 24))) << 8) | + (((u8) (dwdata3 >> 16)) << 16) | + (((u8) (dwdata3 >> 8)) << 24); + } else { + dwdata0 >>= 8; + cmd->resp[0] = ((dwdata0 & 0xff) << 24) | + (((dwdata0 >> 8) & 0xff) << 16) | + (((dwdata0 >> 16) & 0xff) << 8) | (dwdata1 & 0xff); + + dwdata1 >>= 8; + cmd->resp[1] = ((dwdata1 & 0xff) << 24) | + (((dwdata1 >> 8) & 0xff) << 16) | + (((dwdata1 >> 16) & 0xff) << 8); + } +} + +static void via_sdc_send_command(struct via_crdr_mmc_host *host, + struct mmc_command *cmd) +{ + void __iomem *addrbase; + struct mmc_data *data; + u32 cmdctrl = 0; + + WARN_ON(host->cmd); + + data = cmd->data; + mod_timer(&host->timer, jiffies + HZ); + host->cmd = cmd; + + /*Command index*/ + cmdctrl = cmd->opcode << 8; + + /*Response type*/ + switch (mmc_resp_type(cmd)) { + case MMC_RSP_NONE: + cmdctrl |= VIA_CRDR_SDCTRL_RSP_NONE; + break; + case MMC_RSP_R1: + cmdctrl |= VIA_CRDR_SDCTRL_RSP_R1; + break; + case MMC_RSP_R1B: + cmdctrl |= VIA_CRDR_SDCTRL_RSP_R1B; + break; + case MMC_RSP_R2: + cmdctrl |= VIA_CRDR_SDCTRL_RSP_R2; + break; + case MMC_RSP_R3: + cmdctrl |= VIA_CRDR_SDCTRL_RSP_R3; + break; + default: + pr_err("%s: cmd->flag is not valid\n", mmc_hostname(host->mmc)); + break; + } + + if (!(cmd->data)) + goto nodata; + + via_sdc_preparedata(host, data); + + /*Command control*/ + if (data->blocks > 1) { + if (data->flags & MMC_DATA_WRITE) { + cmdctrl |= VIA_CRDR_SDCTRL_WRITE; + cmdctrl |= VIA_CRDR_SDCTRL_MULTI_WR; + } else { + cmdctrl |= VIA_CRDR_SDCTRL_MULTI_RD; + } + } else { + if (data->flags & MMC_DATA_WRITE) { + cmdctrl |= VIA_CRDR_SDCTRL_WRITE; + cmdctrl |= VIA_CRDR_SDCTRL_SINGLE_WR; + } else { + cmdctrl |= VIA_CRDR_SDCTRL_SINGLE_RD; + } + } + +nodata: + if (cmd == host->mrq->stop) + cmdctrl |= VIA_CRDR_SDCTRL_STOP; + + cmdctrl |= VIA_CRDR_SDCTRL_START; + + addrbase = host->sdhc_mmiobase; + writel(cmd->arg, addrbase + VIA_CRDR_SDCARG); + writel(cmdctrl, addrbase + VIA_CRDR_SDCTRL); +} + +static void via_sdc_finish_data(struct via_crdr_mmc_host *host) +{ + struct mmc_data *data; + + BUG_ON(!host->data); + + data = host->data; + host->data = NULL; + + if (data->error) + data->bytes_xfered = 0; + else + data->bytes_xfered = data->blocks * data->blksz; + + dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len, + ((data->flags & MMC_DATA_READ) ? + PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE)); + + if (data->stop) + via_sdc_send_command(host, data->stop); + else + tasklet_schedule(&host->finish_tasklet); +} + +static void via_sdc_finish_command(struct via_crdr_mmc_host *host) +{ + via_sdc_get_response(host, host->cmd); + + host->cmd->error = 0; + + if (!host->cmd->data) + tasklet_schedule(&host->finish_tasklet); + + host->cmd = NULL; +} + +static void via_sdc_request(struct mmc_host *mmc, struct mmc_request *mrq) +{ + void __iomem *addrbase; + struct via_crdr_mmc_host *host; + unsigned long flags; + u16 status; + + host = mmc_priv(mmc); + + spin_lock_irqsave(&host->lock, flags); + + addrbase = host->pcictrl_mmiobase; + writeb(VIA_CRDR_PCIDMACLK_SDC, addrbase + VIA_CRDR_PCIDMACLK); + + status = readw(host->sdhc_mmiobase + VIA_CRDR_SDSTATUS); + status &= VIA_CRDR_SDSTS_W1C_MASK; + writew(status, host->sdhc_mmiobase + VIA_CRDR_SDSTATUS); + + WARN_ON(host->mrq != NULL); + host->mrq = mrq; + + status = readw(host->sdhc_mmiobase + VIA_CRDR_SDSTATUS); + if (!(status & VIA_CRDR_SDSTS_SLOTG) || host->reject) { + host->mrq->cmd->error = -ENOMEDIUM; + tasklet_schedule(&host->finish_tasklet); + } else { + via_sdc_send_command(host, mrq->cmd); + } + + mmiowb(); + spin_unlock_irqrestore(&host->lock, flags); +} + +static void via_sdc_set_power(struct via_crdr_mmc_host *host, + unsigned short power, unsigned int on) +{ + unsigned long flags; + u8 gatt; + + spin_lock_irqsave(&host->lock, flags); + + host->power = (1 << power); + + gatt = readb(host->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT); + if (host->power == MMC_VDD_165_195) + gatt &= ~VIA_CRDR_PCICLKGATT_3V3; + else + gatt |= VIA_CRDR_PCICLKGATT_3V3; + if (on) + gatt |= VIA_CRDR_PCICLKGATT_PAD_PWRON; + else + gatt &= ~VIA_CRDR_PCICLKGATT_PAD_PWRON; + writeb(gatt, host->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT); + + mmiowb(); + spin_unlock_irqrestore(&host->lock, flags); + + via_pwron_sleep(host); +} + +static void via_sdc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) +{ + struct via_crdr_mmc_host *host; + unsigned long flags; + void __iomem *addrbase; + u32 org_data, sdextctrl; + u8 clock; + + host = mmc_priv(mmc); + + spin_lock_irqsave(&host->lock, flags); + + addrbase = host->sdhc_mmiobase; + org_data = readl(addrbase + VIA_CRDR_SDBUSMODE); + sdextctrl = readl(addrbase + VIA_CRDR_SDEXTCTRL); + + if (ios->bus_width == MMC_BUS_WIDTH_1) + org_data &= ~VIA_CRDR_SDMODE_4BIT; + else + org_data |= VIA_CRDR_SDMODE_4BIT; + + if (ios->power_mode == MMC_POWER_OFF) + org_data &= ~VIA_CRDR_SDMODE_CLK_ON; + else + org_data |= VIA_CRDR_SDMODE_CLK_ON; + + if (ios->timing == MMC_TIMING_SD_HS) + sdextctrl |= VIA_CRDR_SDEXTCTRL_HISPD; + else + sdextctrl &= ~VIA_CRDR_SDEXTCTRL_HISPD; + + writel(org_data, addrbase + VIA_CRDR_SDBUSMODE); + writel(sdextctrl, addrbase + VIA_CRDR_SDEXTCTRL); + + if (ios->clock >= 48000000) + clock = PCI_CLK_48M; + else if (ios->clock >= 33000000) + clock = PCI_CLK_33M; + else if (ios->clock >= 24000000) + clock = PCI_CLK_24M; + else if (ios->clock >= 16000000) + clock = PCI_CLK_16M; + else if (ios->clock >= 12000000) + clock = PCI_CLK_12M; + else if (ios->clock >= 8000000) + clock = PCI_CLK_8M; + else + clock = PCI_CLK_375K; + + addrbase = host->pcictrl_mmiobase; + if (readb(addrbase + VIA_CRDR_PCISDCCLK) != clock) + writeb(clock, addrbase + VIA_CRDR_PCISDCCLK); + + mmiowb(); + spin_unlock_irqrestore(&host->lock, flags); + + if (ios->power_mode != MMC_POWER_OFF) + via_sdc_set_power(host, ios->vdd, 1); + else + via_sdc_set_power(host, ios->vdd, 0); +} + +static int via_sdc_get_ro(struct mmc_host *mmc) +{ + struct via_crdr_mmc_host *host; + unsigned long flags; + u16 status; + + host = mmc_priv(mmc); + + spin_lock_irqsave(&host->lock, flags); + + status = readw(host->sdhc_mmiobase + VIA_CRDR_SDSTATUS); + + spin_unlock_irqrestore(&host->lock, flags); + + return !(status & VIA_CRDR_SDSTS_WP); +} + +static const struct mmc_host_ops via_sdc_ops = { + .request = via_sdc_request, + .set_ios = via_sdc_set_ios, + .get_ro = via_sdc_get_ro, +}; + +static void via_reset_pcictrl(struct via_crdr_mmc_host *host) +{ + void __iomem *addrbase; + unsigned long flags; + u8 gatt; + + addrbase = host->pcictrl_mmiobase; + + spin_lock_irqsave(&host->lock, flags); + + via_save_pcictrlreg(host); + via_save_sdcreg(host); + + spin_unlock_irqrestore(&host->lock, flags); + + gatt = VIA_CRDR_PCICLKGATT_PAD_PWRON; + if (host->power == MMC_VDD_165_195) + gatt &= VIA_CRDR_PCICLKGATT_3V3; + else + gatt |= VIA_CRDR_PCICLKGATT_3V3; + writeb(gatt, host->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT); + via_pwron_sleep(host); + gatt |= VIA_CRDR_PCICLKGATT_SFTRST; + writeb(gatt, host->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT); + msleep(3); + + spin_lock_irqsave(&host->lock, flags); + + via_restore_pcictrlreg(host); + via_restore_sdcreg(host); + + mmiowb(); + spin_unlock_irqrestore(&host->lock, flags); +} + +static void via_sdc_cmd_isr(struct via_crdr_mmc_host *host, u16 intmask) +{ + BUG_ON(intmask == 0); + + if (!host->cmd) { + pr_err("%s: Got command interrupt 0x%x even " + "though no command operation was in progress.\n", + mmc_hostname(host->mmc), intmask); + return; + } + + if (intmask & VIA_CRDR_SDSTS_CRTO) + host->cmd->error = -ETIMEDOUT; + else if (intmask & VIA_CRDR_SDSTS_SC) + host->cmd->error = -EILSEQ; + + if (host->cmd->error) + tasklet_schedule(&host->finish_tasklet); + else if (intmask & VIA_CRDR_SDSTS_CRD) + via_sdc_finish_command(host); +} + +static void via_sdc_data_isr(struct via_crdr_mmc_host *host, u16 intmask) +{ + BUG_ON(intmask == 0); + + if (intmask & VIA_CRDR_SDSTS_DT) + host->data->error = -ETIMEDOUT; + else if (intmask & (VIA_CRDR_SDSTS_RC | VIA_CRDR_SDSTS_WC)) + host->data->error = -EILSEQ; + + via_sdc_finish_data(host); +} + +static irqreturn_t via_sdc_isr(int irq, void *dev_id) +{ + struct via_crdr_mmc_host *sdhost = dev_id; + void __iomem *addrbase; + u8 pci_status; + u16 sd_status; + irqreturn_t result; + + if (!sdhost) + return IRQ_NONE; + + spin_lock(&sdhost->lock); + + addrbase = sdhost->pcictrl_mmiobase; + pci_status = readb(addrbase + VIA_CRDR_PCIINTSTATUS); + if (!(pci_status & VIA_CRDR_PCIINTSTATUS_SDC)) { + result = IRQ_NONE; + goto out; + } + + addrbase = sdhost->sdhc_mmiobase; + sd_status = readw(addrbase + VIA_CRDR_SDSTATUS); + sd_status &= VIA_CRDR_SDSTS_INT_MASK; + sd_status &= ~VIA_CRDR_SDSTS_IGN_MASK; + if (!sd_status) { + result = IRQ_NONE; + goto out; + } + + if (sd_status & VIA_CRDR_SDSTS_CIR) { + writew(sd_status & VIA_CRDR_SDSTS_CIR, + addrbase + VIA_CRDR_SDSTATUS); + + schedule_work(&sdhost->carddet_work); + } + + sd_status &= ~VIA_CRDR_SDSTS_CIR; + if (sd_status & VIA_CRDR_SDSTS_CMD_MASK) { + writew(sd_status & VIA_CRDR_SDSTS_CMD_MASK, + addrbase + VIA_CRDR_SDSTATUS); + via_sdc_cmd_isr(sdhost, sd_status & VIA_CRDR_SDSTS_CMD_MASK); + } + if (sd_status & VIA_CRDR_SDSTS_DATA_MASK) { + writew(sd_status & VIA_CRDR_SDSTS_DATA_MASK, + addrbase + VIA_CRDR_SDSTATUS); + via_sdc_data_isr(sdhost, sd_status & VIA_CRDR_SDSTS_DATA_MASK); + } + + sd_status &= ~(VIA_CRDR_SDSTS_CMD_MASK | VIA_CRDR_SDSTS_DATA_MASK); + if (sd_status) { + pr_err("%s: Unexpected interrupt 0x%x\n", + mmc_hostname(sdhost->mmc), sd_status); + writew(sd_status, addrbase + VIA_CRDR_SDSTATUS); + } + + result = IRQ_HANDLED; + + mmiowb(); +out: + spin_unlock(&sdhost->lock); + + return result; +} + +static void via_sdc_timeout(unsigned long ulongdata) +{ + struct via_crdr_mmc_host *sdhost; + unsigned long flags; + + sdhost = (struct via_crdr_mmc_host *)ulongdata; + + spin_lock_irqsave(&sdhost->lock, flags); + + if (sdhost->mrq) { + pr_err("%s: Timeout waiting for hardware interrupt." + "cmd:0x%x\n", mmc_hostname(sdhost->mmc), + sdhost->mrq->cmd->opcode); + + if (sdhost->data) { + writel(VIA_CRDR_DMACTRL_SFTRST, + sdhost->ddma_mmiobase + VIA_CRDR_DMACTRL); + sdhost->data->error = -ETIMEDOUT; + via_sdc_finish_data(sdhost); + } else { + if (sdhost->cmd) + sdhost->cmd->error = -ETIMEDOUT; + else + sdhost->mrq->cmd->error = -ETIMEDOUT; + tasklet_schedule(&sdhost->finish_tasklet); + } + } + + mmiowb(); + spin_unlock_irqrestore(&sdhost->lock, flags); +} + +static void via_sdc_tasklet_finish(unsigned long param) +{ + struct via_crdr_mmc_host *host; + unsigned long flags; + struct mmc_request *mrq; + + host = (struct via_crdr_mmc_host *)param; + + spin_lock_irqsave(&host->lock, flags); + + del_timer(&host->timer); + mrq = host->mrq; + host->mrq = NULL; + host->cmd = NULL; + host->data = NULL; + + spin_unlock_irqrestore(&host->lock, flags); + + mmc_request_done(host->mmc, mrq); +} + +static void via_sdc_card_detect(struct work_struct *work) +{ + struct via_crdr_mmc_host *host; + void __iomem *addrbase; + unsigned long flags; + u16 status; + + host = container_of(work, struct via_crdr_mmc_host, carddet_work); + + addrbase = host->ddma_mmiobase; + writel(VIA_CRDR_DMACTRL_SFTRST, addrbase + VIA_CRDR_DMACTRL); + + spin_lock_irqsave(&host->lock, flags); + + addrbase = host->pcictrl_mmiobase; + writeb(VIA_CRDR_PCIDMACLK_SDC, addrbase + VIA_CRDR_PCIDMACLK); + + addrbase = host->sdhc_mmiobase; + status = readw(addrbase + VIA_CRDR_SDSTATUS); + if (!(status & VIA_CRDR_SDSTS_SLOTG)) { + if (host->mrq) { + pr_err("%s: Card removed during transfer!\n", + mmc_hostname(host->mmc)); + host->mrq->cmd->error = -ENOMEDIUM; + tasklet_schedule(&host->finish_tasklet); + } + + mmiowb(); + spin_unlock_irqrestore(&host->lock, flags); + + via_reset_pcictrl(host); + + spin_lock_irqsave(&host->lock, flags); + } + + mmiowb(); + spin_unlock_irqrestore(&host->lock, flags); + + via_print_pcictrl(host); + via_print_sdchc(host); + + mmc_detect_change(host->mmc, msecs_to_jiffies(500)); +} + +static void via_init_mmc_host(struct via_crdr_mmc_host *host) +{ + struct mmc_host *mmc = host->mmc; + void __iomem *addrbase; + u32 lenreg; + u32 status; + + init_timer(&host->timer); + host->timer.data = (unsigned long)host; + host->timer.function = via_sdc_timeout; + + spin_lock_init(&host->lock); + + mmc->f_min = VIA_CRDR_MIN_CLOCK; + mmc->f_max = VIA_CRDR_MAX_CLOCK; + mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195; + mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SD_HIGHSPEED; + mmc->ops = &via_sdc_ops; + + /*Hardware cannot do scatter lists*/ + mmc->max_hw_segs = 1; + mmc->max_phys_segs = 1; + + mmc->max_blk_size = VIA_CRDR_MAX_BLOCK_LENGTH; + mmc->max_blk_count = VIA_CRDR_MAX_BLOCK_COUNT; + + mmc->max_seg_size = mmc->max_blk_size * mmc->max_blk_count; + mmc->max_req_size = mmc->max_seg_size; + + INIT_WORK(&host->carddet_work, via_sdc_card_detect); + + tasklet_init(&host->finish_tasklet, via_sdc_tasklet_finish, + (unsigned long)host); + + addrbase = host->sdhc_mmiobase; + writel(0x0, addrbase + VIA_CRDR_SDINTMASK); + msleep(1); + + lenreg = VIA_CRDR_SDBLKLEN_GPIDET | VIA_CRDR_SDBLKLEN_INTEN; + writel(lenreg, addrbase + VIA_CRDR_SDBLKLEN); + + status = readw(addrbase + VIA_CRDR_SDSTATUS); + status &= VIA_CRDR_SDSTS_W1C_MASK; + writew(status, addrbase + VIA_CRDR_SDSTATUS); + + status = readw(addrbase + VIA_CRDR_SDSTATUS2); + status |= VIA_CRDR_SDSTS_CFE; + writew(status, addrbase + VIA_CRDR_SDSTATUS2); + + writeb(0x0, addrbase + VIA_CRDR_SDEXTCTRL); + + writel(VIA_CRDR_SDACTIVE_INTMASK, addrbase + VIA_CRDR_SDINTMASK); + msleep(1); +} + +static int __devinit via_sd_probe(struct pci_dev *pcidev, + const struct pci_device_id *id) +{ + struct mmc_host *mmc; + struct via_crdr_mmc_host *sdhost; + u32 base, len; + u8 rev, gatt; + int ret; + + pci_read_config_byte(pcidev, PCI_CLASS_REVISION, &rev); + pr_info(DRV_NAME + ": VIA SDMMC controller found at %s [%04x:%04x] (rev %x)\n", + pci_name(pcidev), (int)pcidev->vendor, (int)pcidev->device, + (int)rev); + + ret = pci_enable_device(pcidev); + if (ret) + return ret; + + ret = pci_request_regions(pcidev, DRV_NAME); + if (ret) + goto disable; + + pci_write_config_byte(pcidev, VIA_CRDR_PCI_WORK_MODE, 0); + pci_write_config_byte(pcidev, VIA_CRDR_PCI_DBG_MODE, 0); + + mmc = mmc_alloc_host(sizeof(struct via_crdr_mmc_host), &pcidev->dev); + if (!mmc) { + ret = -ENOMEM; + goto release; + } + + sdhost = mmc_priv(mmc); + sdhost->mmc = mmc; + dev_set_drvdata(&pcidev->dev, sdhost); + + len = pci_resource_len(pcidev, 0); + base = pci_resource_start(pcidev, 0); + sdhost->mmiobase = ioremap_nocache(base, len); + if (!sdhost->mmiobase) { + ret = -ENOMEM; + goto free_mmc_host; + } + + sdhost->sdhc_mmiobase = + sdhost->mmiobase + VIA_CRDR_SDC_OFF; + sdhost->ddma_mmiobase = + sdhost->mmiobase + VIA_CRDR_DDMA_OFF; + sdhost->pcictrl_mmiobase = + sdhost->mmiobase + VIA_CRDR_PCICTRL_OFF; + + sdhost->power = MMC_VDD_165_195; + + gatt = VIA_CRDR_PCICLKGATT_3V3 | VIA_CRDR_PCICLKGATT_PAD_PWRON; + writeb(gatt, sdhost->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT); + via_pwron_sleep(sdhost); + gatt |= VIA_CRDR_PCICLKGATT_SFTRST; + writeb(gatt, sdhost->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT); + msleep(3); + + via_init_mmc_host(sdhost); + + ret = + request_irq(pcidev->irq, via_sdc_isr, IRQF_SHARED, DRV_NAME, + sdhost); + if (ret) + goto unmap; + + writeb(VIA_CRDR_PCIINTCTRL_SDCIRQEN, + sdhost->pcictrl_mmiobase + VIA_CRDR_PCIINTCTRL); + writeb(VIA_CRDR_PCITMOCTRL_1024MS, + sdhost->pcictrl_mmiobase + VIA_CRDR_PCITMOCTRL); + + /* device-specific quirks */ + if (pcidev->subsystem_vendor == PCI_VENDOR_ID_LENOVO && + pcidev->subsystem_device == 0x3891) + sdhost->quirks = VIA_CRDR_QUIRK_300MS_PWRDELAY; + + mmc_add_host(mmc); + + return 0; + +unmap: + iounmap(sdhost->mmiobase); +free_mmc_host: + dev_set_drvdata(&pcidev->dev, NULL); + mmc_free_host(mmc); +release: + pci_release_regions(pcidev); +disable: + pci_disable_device(pcidev); + + return ret; +} + +static void __devexit via_sd_remove(struct pci_dev *pcidev) +{ + struct via_crdr_mmc_host *sdhost = pci_get_drvdata(pcidev); + unsigned long flags; + u8 gatt; + + spin_lock_irqsave(&sdhost->lock, flags); + + /* Ensure we don't accept more commands from mmc layer */ + sdhost->reject = 1; + + /* Disable generating further interrupts */ + writeb(0x0, sdhost->pcictrl_mmiobase + VIA_CRDR_PCIINTCTRL); + mmiowb(); + + if (sdhost->mrq) { + printk(KERN_ERR "%s: Controller removed during " + "transfer\n", mmc_hostname(sdhost->mmc)); + + /* make sure all DMA is stopped */ + writel(VIA_CRDR_DMACTRL_SFTRST, + sdhost->ddma_mmiobase + VIA_CRDR_DMACTRL); + mmiowb(); + sdhost->mrq->cmd->error = -ENOMEDIUM; + if (sdhost->mrq->stop) + sdhost->mrq->stop->error = -ENOMEDIUM; + tasklet_schedule(&sdhost->finish_tasklet); + } + spin_unlock_irqrestore(&sdhost->lock, flags); + + mmc_remove_host(sdhost->mmc); + + free_irq(pcidev->irq, sdhost); + + del_timer_sync(&sdhost->timer); + + tasklet_kill(&sdhost->finish_tasklet); + + /* switch off power */ + gatt = readb(sdhost->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT); + gatt &= ~VIA_CRDR_PCICLKGATT_PAD_PWRON; + writeb(gatt, sdhost->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT); + + iounmap(sdhost->mmiobase); + dev_set_drvdata(&pcidev->dev, NULL); + mmc_free_host(sdhost->mmc); + pci_release_regions(pcidev); + pci_disable_device(pcidev); + + pr_info(DRV_NAME + ": VIA SDMMC controller at %s [%04x:%04x] has been removed\n", + pci_name(pcidev), (int)pcidev->vendor, (int)pcidev->device); +} + +#ifdef CONFIG_PM + +static void via_init_sdc_pm(struct via_crdr_mmc_host *host) +{ + struct sdhcreg *pm_sdhcreg; + void __iomem *addrbase; + u32 lenreg; + u16 status; + + pm_sdhcreg = &(host->pm_sdhc_reg); + addrbase = host->sdhc_mmiobase; + + writel(0x0, addrbase + VIA_CRDR_SDINTMASK); + + lenreg = VIA_CRDR_SDBLKLEN_GPIDET | VIA_CRDR_SDBLKLEN_INTEN; + writel(lenreg, addrbase + VIA_CRDR_SDBLKLEN); + + status = readw(addrbase + VIA_CRDR_SDSTATUS); + status &= VIA_CRDR_SDSTS_W1C_MASK; + writew(status, addrbase + VIA_CRDR_SDSTATUS); + + status = readw(addrbase + VIA_CRDR_SDSTATUS2); + status |= VIA_CRDR_SDSTS_CFE; + writew(status, addrbase + VIA_CRDR_SDSTATUS2); + + writel(pm_sdhcreg->sdcontrol_reg, addrbase + VIA_CRDR_SDCTRL); + writel(pm_sdhcreg->sdcmdarg_reg, addrbase + VIA_CRDR_SDCARG); + writel(pm_sdhcreg->sdintmask_reg, addrbase + VIA_CRDR_SDINTMASK); + writel(pm_sdhcreg->sdrsptmo_reg, addrbase + VIA_CRDR_SDRSPTMO); + writel(pm_sdhcreg->sdclksel_reg, addrbase + VIA_CRDR_SDCLKSEL); + writel(pm_sdhcreg->sdextctrl_reg, addrbase + VIA_CRDR_SDEXTCTRL); + + via_print_pcictrl(host); + via_print_sdchc(host); +} + +static int via_sd_suspend(struct pci_dev *pcidev, pm_message_t state) +{ + struct via_crdr_mmc_host *host; + int ret = 0; + + host = pci_get_drvdata(pcidev); + + via_save_pcictrlreg(host); + via_save_sdcreg(host); + + ret = mmc_suspend_host(host->mmc, state); + + pci_save_state(pcidev); + pci_enable_wake(pcidev, pci_choose_state(pcidev, state), 0); + pci_disable_device(pcidev); + pci_set_power_state(pcidev, pci_choose_state(pcidev, state)); + + return ret; +} + +static int via_sd_resume(struct pci_dev *pcidev) +{ + struct via_crdr_mmc_host *sdhost; + int ret = 0; + u8 gatt; + + sdhost = pci_get_drvdata(pcidev); + + gatt = VIA_CRDR_PCICLKGATT_PAD_PWRON; + if (sdhost->power == MMC_VDD_165_195) + gatt &= ~VIA_CRDR_PCICLKGATT_3V3; + else + gatt |= VIA_CRDR_PCICLKGATT_3V3; + writeb(gatt, sdhost->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT); + via_pwron_sleep(sdhost); + gatt |= VIA_CRDR_PCICLKGATT_SFTRST; + writeb(gatt, sdhost->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT); + msleep(3); + + msleep(100); + + pci_set_power_state(pcidev, PCI_D0); + pci_restore_state(pcidev); + ret = pci_enable_device(pcidev); + if (ret) + return ret; + + via_restore_pcictrlreg(sdhost); + via_init_sdc_pm(sdhost); + + ret = mmc_resume_host(sdhost->mmc); + + return ret; +} + +#else /* CONFIG_PM */ + +#define via_sd_suspend NULL +#define via_sd_resume NULL + +#endif /* CONFIG_PM */ + +static struct pci_driver via_sd_driver = { + .name = DRV_NAME, + .id_table = via_ids, + .probe = via_sd_probe, + .remove = __devexit_p(via_sd_remove), + .suspend = via_sd_suspend, + .resume = via_sd_resume, +}; + +static int __init via_sd_drv_init(void) +{ + pr_info(DRV_NAME ": VIA SD/MMC Card Reader driver " + "(C) 2008 VIA Technologies, Inc.\n"); + + return pci_register_driver(&via_sd_driver); +} + +static void __exit via_sd_drv_exit(void) +{ + pci_unregister_driver(&via_sd_driver); +} + +module_init(via_sd_drv_init); +module_exit(via_sd_drv_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("VIA Technologies Inc."); +MODULE_DESCRIPTION("VIA SD/MMC Card Interface driver"); |