From: Linus Torvalds Date: Sun, 6 May 2007 20:20:10 +0000 (-0700) Subject: Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c6799ade4ae04b53a5f677e5289116155ff01574;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git Merge branch 'for-linus' of /home/rmk/linux-2.6-arm * 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: (82 commits) [ARM] Add comments marking in-use ptrace numbers [ARM] Move syscall saving out of the way of utrace [ARM] 4360/1: S3C24XX: regs-udc.h remove unused macro [ARM] 4358/1: S3C24XX: mach-qt2410.c: remove linux/mmc/protocol.h header [ARM] mm 10: allow memory type to be specified with ioremap [ARM] mm 9: add additional device memory types [ARM] mm 8: define mem_types table L1 bit 4 to be for ARMv6 [ARM] iop: add missing parens in macro [ARM] mm 7: remove duplicated __ioremap() prototypes ARM: OMAP: fix OMAP1 mpuio suspend/resume oops ARM: OMAP: MPUIO wake updates ARM: OMAP: speed up gpio irq handling ARM: OMAP: plat-omap changes for 2430 SDP ARM: OMAP: gpio object shrinkage, cleanup ARM: OMAP: /sys/kernel/debug/omap_gpio ARM: OMAP: Implement workaround for GPIO wakeup bug in OMAP2420 silicon ARM: OMAP: Enable 24xx GPIO autoidling [ARM] 4318/2: DSM-G600 Board Support [ARM] 4227/1: minor head.S fixups [ARM] 4328/1: Move i.MX UART regs to driver ... --- c6799ade4ae04b53a5f677e5289116155ff01574 diff --cc drivers/mmc/host/pxamci.c index a98ff98fa567,000000000000..d97d3864b57f mode 100644,000000..100644 --- a/drivers/mmc/host/pxamci.c +++ b/drivers/mmc/host/pxamci.c @@@ -1,616 -1,0 +1,616 @@@ +/* + * linux/drivers/mmc/pxa.c - PXA MMCI driver + * + * Copyright (C) 2003 Russell King, 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 version 2 as + * published by the Free Software Foundation. + * + * This hardware is really sick: + * - No way to clear interrupts. + * - Have to turn off the clock whenever we touch the device. + * - Doesn't tell you how many data blocks were transferred. + * Yuck! + * + * 1 and 3 byte data transfers not supported + * max block length up to 1023 + */ +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#include +#include + +#include "pxamci.h" + +#define DRIVER_NAME "pxa2xx-mci" + +#define NR_SG 1 + +struct pxamci_host { + struct mmc_host *mmc; + spinlock_t lock; + struct resource *res; + void __iomem *base; + int irq; + int dma; + unsigned int clkrt; + unsigned int cmdat; + unsigned int imask; + unsigned int power_mode; + struct pxamci_platform_data *pdata; + + struct mmc_request *mrq; + struct mmc_command *cmd; + struct mmc_data *data; + + dma_addr_t sg_dma; + struct pxa_dma_desc *sg_cpu; + unsigned int dma_len; + + unsigned int dma_dir; +}; + +static void pxamci_stop_clock(struct pxamci_host *host) +{ + if (readl(host->base + MMC_STAT) & STAT_CLK_EN) { + unsigned long timeout = 10000; + unsigned int v; + + writel(STOP_CLOCK, host->base + MMC_STRPCL); + + do { + v = readl(host->base + MMC_STAT); + if (!(v & STAT_CLK_EN)) + break; + udelay(1); + } while (timeout--); + + if (v & STAT_CLK_EN) + dev_err(mmc_dev(host->mmc), "unable to stop clock\n"); + } +} + +static void pxamci_enable_irq(struct pxamci_host *host, unsigned int mask) +{ + unsigned long flags; + + spin_lock_irqsave(&host->lock, flags); + host->imask &= ~mask; + writel(host->imask, host->base + MMC_I_MASK); + spin_unlock_irqrestore(&host->lock, flags); +} + +static void pxamci_disable_irq(struct pxamci_host *host, unsigned int mask) +{ + unsigned long flags; + + spin_lock_irqsave(&host->lock, flags); + host->imask |= mask; + writel(host->imask, host->base + MMC_I_MASK); + spin_unlock_irqrestore(&host->lock, flags); +} + +static void pxamci_setup_data(struct pxamci_host *host, struct mmc_data *data) +{ + unsigned int nob = data->blocks; + unsigned long long clks; + unsigned int timeout; + u32 dcmd; + int i; + + host->data = data; + + if (data->flags & MMC_DATA_STREAM) + nob = 0xffff; + + writel(nob, host->base + MMC_NOB); + writel(data->blksz, host->base + MMC_BLKLEN); + + clks = (unsigned long long)data->timeout_ns * CLOCKRATE; + do_div(clks, 1000000000UL); + timeout = (unsigned int)clks + (data->timeout_clks << host->clkrt); + writel((timeout + 255) / 256, host->base + MMC_RDTO); + + if (data->flags & MMC_DATA_READ) { + host->dma_dir = DMA_FROM_DEVICE; + dcmd = DCMD_INCTRGADDR | DCMD_FLOWTRG; + DRCMRTXMMC = 0; + DRCMRRXMMC = host->dma | DRCMR_MAPVLD; + } else { + host->dma_dir = DMA_TO_DEVICE; + dcmd = DCMD_INCSRCADDR | DCMD_FLOWSRC; + DRCMRRXMMC = 0; + DRCMRTXMMC = host->dma | DRCMR_MAPVLD; + } + + dcmd |= DCMD_BURST32 | DCMD_WIDTH1; + + host->dma_len = dma_map_sg(mmc_dev(host->mmc), data->sg, data->sg_len, + host->dma_dir); + + for (i = 0; i < host->dma_len; i++) { + if (data->flags & MMC_DATA_READ) { + host->sg_cpu[i].dsadr = host->res->start + MMC_RXFIFO; + host->sg_cpu[i].dtadr = sg_dma_address(&data->sg[i]); + } else { + host->sg_cpu[i].dsadr = sg_dma_address(&data->sg[i]); + host->sg_cpu[i].dtadr = host->res->start + MMC_TXFIFO; + } + host->sg_cpu[i].dcmd = dcmd | sg_dma_len(&data->sg[i]); + host->sg_cpu[i].ddadr = host->sg_dma + (i + 1) * + sizeof(struct pxa_dma_desc); + } + host->sg_cpu[host->dma_len - 1].ddadr = DDADR_STOP; + wmb(); + + DDADR(host->dma) = host->sg_dma; + DCSR(host->dma) = DCSR_RUN; +} + +static void pxamci_start_cmd(struct pxamci_host *host, struct mmc_command *cmd, unsigned int cmdat) +{ + WARN_ON(host->cmd != NULL); + host->cmd = cmd; + + if (cmd->flags & MMC_RSP_BUSY) + cmdat |= CMDAT_BUSY; + +#define RSP_TYPE(x) ((x) & ~(MMC_RSP_BUSY|MMC_RSP_OPCODE)) + switch (RSP_TYPE(mmc_resp_type(cmd))) { + case RSP_TYPE(MMC_RSP_R1): /* r1, r1b, r6, r7 */ + cmdat |= CMDAT_RESP_SHORT; + break; + case RSP_TYPE(MMC_RSP_R3): + cmdat |= CMDAT_RESP_R3; + break; + case RSP_TYPE(MMC_RSP_R2): + cmdat |= CMDAT_RESP_R2; + break; + default: + break; + } + + writel(cmd->opcode, host->base + MMC_CMD); + writel(cmd->arg >> 16, host->base + MMC_ARGH); + writel(cmd->arg & 0xffff, host->base + MMC_ARGL); + writel(cmdat, host->base + MMC_CMDAT); + writel(host->clkrt, host->base + MMC_CLKRT); + + writel(START_CLOCK, host->base + MMC_STRPCL); + + pxamci_enable_irq(host, END_CMD_RES); +} + +static void pxamci_finish_request(struct pxamci_host *host, struct mmc_request *mrq) +{ + host->mrq = NULL; + host->cmd = NULL; + host->data = NULL; + mmc_request_done(host->mmc, mrq); +} + +static int pxamci_cmd_done(struct pxamci_host *host, unsigned int stat) +{ + struct mmc_command *cmd = host->cmd; + int i; + u32 v; + + if (!cmd) + return 0; + + host->cmd = NULL; + + /* + * Did I mention this is Sick. We always need to + * discard the upper 8 bits of the first 16-bit word. + */ + v = readl(host->base + MMC_RES) & 0xffff; + for (i = 0; i < 4; i++) { + u32 w1 = readl(host->base + MMC_RES) & 0xffff; + u32 w2 = readl(host->base + MMC_RES) & 0xffff; + cmd->resp[i] = v << 24 | w1 << 8 | w2 >> 8; + v = w2; + } + + if (stat & STAT_TIME_OUT_RESPONSE) { + cmd->error = MMC_ERR_TIMEOUT; + } else if (stat & STAT_RES_CRC_ERR && cmd->flags & MMC_RSP_CRC) { +#ifdef CONFIG_PXA27x + /* + * workaround for erratum #42: + * Intel PXA27x Family Processor Specification Update Rev 001 + */ + if (cmd->opcode == MMC_ALL_SEND_CID || + cmd->opcode == MMC_SEND_CSD || + cmd->opcode == MMC_SEND_CID) { + /* a bogus CRC error can appear if the msb of + the 15 byte response is a one */ + if ((cmd->resp[0] & 0x80000000) == 0) + cmd->error = MMC_ERR_BADCRC; + } else { + pr_debug("ignoring CRC from command %d - *risky*\n",cmd->opcode); + } +#else + cmd->error = MMC_ERR_BADCRC; +#endif + } + + pxamci_disable_irq(host, END_CMD_RES); + if (host->data && cmd->error == MMC_ERR_NONE) { + pxamci_enable_irq(host, DATA_TRAN_DONE); + } else { + pxamci_finish_request(host, host->mrq); + } + + return 1; +} + +static int pxamci_data_done(struct pxamci_host *host, unsigned int stat) +{ + struct mmc_data *data = host->data; + + if (!data) + return 0; + + DCSR(host->dma) = 0; + dma_unmap_sg(mmc_dev(host->mmc), data->sg, host->dma_len, + host->dma_dir); + + if (stat & STAT_READ_TIME_OUT) + data->error = MMC_ERR_TIMEOUT; + else if (stat & (STAT_CRC_READ_ERROR|STAT_CRC_WRITE_ERROR)) + data->error = MMC_ERR_BADCRC; + + /* + * There appears to be a hardware design bug here. There seems to + * be no way to find out how much data was transferred to the card. + * This means that if there was an error on any block, we mark all + * data blocks as being in error. + */ + if (data->error == MMC_ERR_NONE) + data->bytes_xfered = data->blocks * data->blksz; + else + data->bytes_xfered = 0; + + pxamci_disable_irq(host, DATA_TRAN_DONE); + + host->data = NULL; + if (host->mrq->stop) { + pxamci_stop_clock(host); + pxamci_start_cmd(host, host->mrq->stop, 0); + } else { + pxamci_finish_request(host, host->mrq); + } + + return 1; +} + +static irqreturn_t pxamci_irq(int irq, void *devid) +{ + struct pxamci_host *host = devid; + unsigned int ireg; + int handled = 0; + + ireg = readl(host->base + MMC_I_REG); + + if (ireg) { + unsigned stat = readl(host->base + MMC_STAT); + + pr_debug("PXAMCI: irq %08x stat %08x\n", ireg, stat); + + if (ireg & END_CMD_RES) + handled |= pxamci_cmd_done(host, stat); + if (ireg & DATA_TRAN_DONE) + handled |= pxamci_data_done(host, stat); + } + + return IRQ_RETVAL(handled); +} + +static void pxamci_request(struct mmc_host *mmc, struct mmc_request *mrq) +{ + struct pxamci_host *host = mmc_priv(mmc); + unsigned int cmdat; + + WARN_ON(host->mrq != NULL); + + host->mrq = mrq; + + pxamci_stop_clock(host); + + cmdat = host->cmdat; + host->cmdat &= ~CMDAT_INIT; + + if (mrq->data) { + pxamci_setup_data(host, mrq->data); + + cmdat &= ~CMDAT_BUSY; + cmdat |= CMDAT_DATAEN | CMDAT_DMAEN; + if (mrq->data->flags & MMC_DATA_WRITE) + cmdat |= CMDAT_WRITE; + + if (mrq->data->flags & MMC_DATA_STREAM) + cmdat |= CMDAT_STREAM; + } + + pxamci_start_cmd(host, mrq->cmd, cmdat); +} + +static int pxamci_get_ro(struct mmc_host *mmc) +{ + struct pxamci_host *host = mmc_priv(mmc); + + if (host->pdata && host->pdata->get_ro) + return host->pdata->get_ro(mmc_dev(mmc)); + /* Host doesn't support read only detection so assume writeable */ + return 0; +} + +static void pxamci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) +{ + struct pxamci_host *host = mmc_priv(mmc); + + if (ios->clock) { + unsigned int clk = CLOCKRATE / ios->clock; + if (CLOCKRATE / clk > ios->clock) + clk <<= 1; + host->clkrt = fls(clk) - 1; - pxa_set_cken(CKEN12_MMC, 1); ++ pxa_set_cken(CKEN_MMC, 1); + + /* + * we write clkrt on the next command + */ + } else { + pxamci_stop_clock(host); - pxa_set_cken(CKEN12_MMC, 0); ++ pxa_set_cken(CKEN_MMC, 0); + } + + if (host->power_mode != ios->power_mode) { + host->power_mode = ios->power_mode; + + if (host->pdata && host->pdata->setpower) + host->pdata->setpower(mmc_dev(mmc), ios->vdd); + + if (ios->power_mode == MMC_POWER_ON) + host->cmdat |= CMDAT_INIT; + } + + pr_debug("PXAMCI: clkrt = %x cmdat = %x\n", + host->clkrt, host->cmdat); +} + +static const struct mmc_host_ops pxamci_ops = { + .request = pxamci_request, + .get_ro = pxamci_get_ro, + .set_ios = pxamci_set_ios, +}; + +static void pxamci_dma_irq(int dma, void *devid) +{ + printk(KERN_ERR "DMA%d: IRQ???\n", dma); + DCSR(dma) = DCSR_STARTINTR|DCSR_ENDINTR|DCSR_BUSERR; +} + +static irqreturn_t pxamci_detect_irq(int irq, void *devid) +{ + struct pxamci_host *host = mmc_priv(devid); + + mmc_detect_change(devid, host->pdata->detect_delay); + return IRQ_HANDLED; +} + +static int pxamci_probe(struct platform_device *pdev) +{ + struct mmc_host *mmc; + struct pxamci_host *host = NULL; + struct resource *r; + int ret, irq; + + r = platform_get_resource(pdev, IORESOURCE_MEM, 0); + irq = platform_get_irq(pdev, 0); + if (!r || irq < 0) + return -ENXIO; + + r = request_mem_region(r->start, SZ_4K, DRIVER_NAME); + if (!r) + return -EBUSY; + + mmc = mmc_alloc_host(sizeof(struct pxamci_host), &pdev->dev); + if (!mmc) { + ret = -ENOMEM; + goto out; + } + + mmc->ops = &pxamci_ops; + mmc->f_min = CLOCKRATE_MIN; + mmc->f_max = CLOCKRATE_MAX; + + /* + * We can do SG-DMA, but we don't because we never know how much + * data we successfully wrote to the card. + */ + mmc->max_phys_segs = NR_SG; + + /* + * Our hardware DMA can handle a maximum of one page per SG entry. + */ + mmc->max_seg_size = PAGE_SIZE; + + /* + * Block length register is 10 bits. + */ + mmc->max_blk_size = 1023; + + /* + * Block count register is 16 bits. + */ + mmc->max_blk_count = 65535; + + host = mmc_priv(mmc); + host->mmc = mmc; + host->dma = -1; + host->pdata = pdev->dev.platform_data; + mmc->ocr_avail = host->pdata ? + host->pdata->ocr_mask : + MMC_VDD_32_33|MMC_VDD_33_34; + + host->sg_cpu = dma_alloc_coherent(&pdev->dev, PAGE_SIZE, &host->sg_dma, GFP_KERNEL); + if (!host->sg_cpu) { + ret = -ENOMEM; + goto out; + } + + spin_lock_init(&host->lock); + host->res = r; + host->irq = irq; + host->imask = MMC_I_MASK_ALL; + + host->base = ioremap(r->start, SZ_4K); + if (!host->base) { + ret = -ENOMEM; + goto out; + } + + /* + * Ensure that the host controller is shut down, and setup + * with our defaults. + */ + pxamci_stop_clock(host); + writel(0, host->base + MMC_SPI); + writel(64, host->base + MMC_RESTO); + writel(host->imask, host->base + MMC_I_MASK); + + host->dma = pxa_request_dma(DRIVER_NAME, DMA_PRIO_LOW, + pxamci_dma_irq, host); + if (host->dma < 0) { + ret = -EBUSY; + goto out; + } + + ret = request_irq(host->irq, pxamci_irq, 0, DRIVER_NAME, host); + if (ret) + goto out; + + platform_set_drvdata(pdev, mmc); + + if (host->pdata && host->pdata->init) + host->pdata->init(&pdev->dev, pxamci_detect_irq, mmc); + + mmc_add_host(mmc); + + return 0; + + out: + if (host) { + if (host->dma >= 0) + pxa_free_dma(host->dma); + if (host->base) + iounmap(host->base); + if (host->sg_cpu) + dma_free_coherent(&pdev->dev, PAGE_SIZE, host->sg_cpu, host->sg_dma); + } + if (mmc) + mmc_free_host(mmc); + release_resource(r); + return ret; +} + +static int pxamci_remove(struct platform_device *pdev) +{ + struct mmc_host *mmc = platform_get_drvdata(pdev); + + platform_set_drvdata(pdev, NULL); + + if (mmc) { + struct pxamci_host *host = mmc_priv(mmc); + + if (host->pdata && host->pdata->exit) + host->pdata->exit(&pdev->dev, mmc); + + mmc_remove_host(mmc); + + pxamci_stop_clock(host); + writel(TXFIFO_WR_REQ|RXFIFO_RD_REQ|CLK_IS_OFF|STOP_CMD| + END_CMD_RES|PRG_DONE|DATA_TRAN_DONE, + host->base + MMC_I_MASK); + + DRCMRRXMMC = 0; + DRCMRTXMMC = 0; + + free_irq(host->irq, host); + pxa_free_dma(host->dma); + iounmap(host->base); + dma_free_coherent(&pdev->dev, PAGE_SIZE, host->sg_cpu, host->sg_dma); + + release_resource(host->res); + + mmc_free_host(mmc); + } + return 0; +} + +#ifdef CONFIG_PM +static int pxamci_suspend(struct platform_device *dev, pm_message_t state) +{ + struct mmc_host *mmc = platform_get_drvdata(dev); + int ret = 0; + + if (mmc) + ret = mmc_suspend_host(mmc, state); + + return ret; +} + +static int pxamci_resume(struct platform_device *dev) +{ + struct mmc_host *mmc = platform_get_drvdata(dev); + int ret = 0; + + if (mmc) + ret = mmc_resume_host(mmc); + + return ret; +} +#else +#define pxamci_suspend NULL +#define pxamci_resume NULL +#endif + +static struct platform_driver pxamci_driver = { + .probe = pxamci_probe, + .remove = pxamci_remove, + .suspend = pxamci_suspend, + .resume = pxamci_resume, + .driver = { + .name = DRIVER_NAME, + }, +}; + +static int __init pxamci_init(void) +{ + return platform_driver_register(&pxamci_driver); +} + +static void __exit pxamci_exit(void) +{ + platform_driver_unregister(&pxamci_driver); +} + +module_init(pxamci_init); +module_exit(pxamci_exit); + +MODULE_DESCRIPTION("PXA Multimedia Card Interface Driver"); +MODULE_LICENSE("GPL");