From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from 5.mo5.mail-out.ovh.net ([87.98.173.103] helo=mo5.mail-out.ovh.net) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1VXSlD-0000td-4z for barebox@lists.infradead.org; Sat, 19 Oct 2013 09:23:55 +0000 Received: from mail31.ha.ovh.net (b9.ovh.net [213.186.33.59]) by mo5.mail-out.ovh.net (Postfix) with SMTP id 13909FF86F5 for ; Sat, 19 Oct 2013 11:23:46 +0200 (CEST) From: Jean-Christophe PLAGNIOL-VILLARD Date: Sat, 19 Oct 2013 11:25:08 +0200 Message-Id: <1382174709-26633-2-git-send-email-plagnioj@jcrosoft.com> In-Reply-To: <1382174709-26633-1-git-send-email-plagnioj@jcrosoft.com> References: <20131019092406.GA32444@ns203013.ovh.net> <1382174709-26633-1-git-send-email-plagnioj@jcrosoft.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 2/3] add: mmci drivers To: barebox@lists.infradead.org Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD --- drivers/mci/Kconfig | 6 + drivers/mci/Makefile | 1 + drivers/mci/mmci.c | 690 ++++++++++++++++++++++++++++++++++++++++++++++ drivers/mci/mmci.h | 167 +++++++++++ include/linux/amba/mmci.h | 42 +++ 5 files changed, 906 insertions(+) create mode 100644 drivers/mci/mmci.c create mode 100644 drivers/mci/mmci.h create mode 100644 include/linux/amba/mmci.h diff --git a/drivers/mci/Kconfig b/drivers/mci/Kconfig index f34c119..bd85424 100644 --- a/drivers/mci/Kconfig +++ b/drivers/mci/Kconfig @@ -101,6 +101,12 @@ config MCI_ATMEL Enable this entry to add support to read and write SD cards on a Atmel AT91. +config MCI_MMCI + bool "ARM PL180 MMCI" + help + Enable this entry to add support to read and write SD cards on a + ARM AMBA PL180. + config MCI_SPI bool "MMC/SD over SPI" select CRC7 diff --git a/drivers/mci/Makefile b/drivers/mci/Makefile index c13dad3..421ca9f 100644 --- a/drivers/mci/Makefile +++ b/drivers/mci/Makefile @@ -9,3 +9,4 @@ obj-$(CONFIG_MCI_PXA) += pxamci.o obj-$(CONFIG_MCI_S3C) += s3c.o obj-$(CONFIG_MCI_SPI) += mci_spi.o obj-$(CONFIG_MCI_DW) += dw_mmc.o +obj-$(CONFIG_MCI_MMCI) += mmci.o diff --git a/drivers/mci/mmci.c b/drivers/mci/mmci.c new file mode 100644 index 0000000..66ca450 --- /dev/null +++ b/drivers/mci/mmci.c @@ -0,0 +1,690 @@ +/* + * ARM PrimeCell MultiMedia Card Interface - PL180 + * + * Copyright (C) ST-Ericsson SA 2010 + * + * Author: Ulf Hansson + * Author: Martin Lundholm + * Ported to drivers/mmc/ by: Matt Waddel + * + * 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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "mmci.h" + +#define DRIVER_NAME "mmci-pl18x" + +static unsigned long fmax = 515633; + +/** + * struct variant_data - MMCI variant-specific quirks + * @clkreg: default value for MCICLOCK register + * @clkreg_enable: enable value for MMCICLOCK register + * @datalength_bits: number of bits in the MMCIDATALENGTH register + * @fifosize: number of bytes that can be written when MMCI_TXFIFOEMPTY + * is asserted (likewise for RX) + * @fifohalfsize: number of bytes that can be written when MCI_TXFIFOHALFEMPTY + * is asserted (likewise for RX) + * @sdio: variant supports SDIO + * @st_clkdiv: true if using a ST-specific clock divider algorithm + * @blksz_datactrl16: true if Block size is at b16..b30 position in datactrl register + * @pwrreg_powerup: power up value for MMCIPOWER register + * @signal_direction: input/out direction of bus signals can be indicated + */ +struct variant_data { + unsigned int clkreg; + unsigned int clkreg_enable; + unsigned int datalength_bits; + unsigned int fifosize; + unsigned int fifohalfsize; + bool sdio; + bool st_clkdiv; + bool blksz_datactrl16; + u32 pwrreg_powerup; + bool signal_direction; +}; + +static struct variant_data variant_arm = { + .fifosize = 16 * 4, + .fifohalfsize = 8 * 4, + .datalength_bits = 16, + .pwrreg_powerup = MCI_PWR_UP, +}; + +static struct variant_data variant_arm_extended_fifo = { + .fifosize = 128 * 4, + .fifohalfsize = 64 * 4, + .datalength_bits = 16, + .pwrreg_powerup = MCI_PWR_UP, +}; + +static struct variant_data variant_ux500 = { + .fifosize = 30 * 4, + .fifohalfsize = 8 * 4, + .clkreg = MCI_CLK_ENABLE, + .clkreg_enable = MCI_ST_UX500_HWFCEN, + .datalength_bits = 24, + .sdio = true, + .st_clkdiv = true, + .pwrreg_powerup = MCI_PWR_ON, + .signal_direction = true, +}; + +static struct variant_data variant_ux500v2 = { + .fifosize = 30 * 4, + .fifohalfsize = 8 * 4, + .clkreg = MCI_CLK_ENABLE, + .clkreg_enable = MCI_ST_UX500_HWFCEN, + .datalength_bits = 24, + .sdio = true, + .st_clkdiv = true, + .blksz_datactrl16 = true, + .pwrreg_powerup = MCI_PWR_ON, + .signal_direction = true, +}; + +struct mmci_host { + struct mci_host mci; + void __iomem *base; + struct device_d *hw_dev; + struct mmci_platform_data *plat; + struct clk *clk; + unsigned long mclk; + + int hw_revision; + int hw_designer; + struct variant_data *variant; +}; + +#define to_mci_host(mci) container_of(mci, struct mmci_host, mci) + +static inline u32 mmci_readl(struct mmci_host *host, u32 offset) +{ + return readl(host->base + offset); +} + +static inline void mmci_writel(struct mmci_host *host, u32 offset, + u32 value) +{ + writel(value, host->base + offset); +} + +static int wait_for_command_end(struct mci_host *mci, struct mci_cmd *cmd) +{ + u32 hoststatus, statusmask; + struct mmci_host *host = to_mci_host(mci); + + statusmask = MCI_CMDTIMEOUT | MCI_CMDCRCFAIL; + if ((cmd->resp_type & MMC_RSP_PRESENT)) + statusmask |= MCI_CMDRESPEND; + else + statusmask |= MCI_CMDSENT; + + do + hoststatus = mmci_readl(host, MMCISTATUS) & statusmask; + while (!hoststatus); + + dev_dbg(host->hw_dev, "SDI_ICR <= 0x%08X\n", statusmask); + dev_dbg(host->hw_dev, "status <= 0x%08X\n", hoststatus); + mmci_writel(host, MMCICLEAR, statusmask); + if (hoststatus & MCI_CMDTIMEOUT) { + dev_dbg(host->hw_dev, "CMD%d time out\n", cmd->cmdidx); + return -ETIMEDOUT; + } else if ((hoststatus & MCI_CMDCRCFAIL) && + (cmd->resp_type & MMC_RSP_CRC)) { + dev_err(host->hw_dev, "CMD%d CRC error\n", cmd->cmdidx); + return -EILSEQ; + } + + if (cmd->resp_type & MMC_RSP_PRESENT) { + cmd->response[0] = mmci_readl(host, MMCIRESPONSE0); + cmd->response[1] = mmci_readl(host, MMCIRESPONSE1); + cmd->response[2] = mmci_readl(host, MMCIRESPONSE2); + cmd->response[3] = mmci_readl(host, MMCIRESPONSE3); + dev_dbg(host->hw_dev, "CMD%d response[0]:0x%08X, response[1]:0x%08X, " + "response[2]:0x%08X, response[3]:0x%08X\n", + cmd->cmdidx, cmd->response[0], cmd->response[1], + cmd->response[2], cmd->response[3]); + } + + return 0; +} + +/* send command to the mmc card and wait for results */ +static int do_command(struct mci_host *mci, struct mci_cmd *cmd) +{ + int result; + u32 sdi_cmd = 0; + struct mmci_host *host = to_mci_host(mci); + + dev_dbg(host->hw_dev, "Request to do CMD%d\n", cmd->cmdidx); + + sdi_cmd = ((cmd->cmdidx & MCI_CMDINDEXMASK) | MCI_CPSM_ENABLE); + + if (cmd->resp_type) { + sdi_cmd |= MCI_CPSM_RESPONSE; + if (cmd->resp_type & MMC_RSP_136) + sdi_cmd |= MCI_CPSM_LONGRSP; + } + + dev_dbg(host->hw_dev, "SDI_ARG <= 0x%08X\n", cmd->cmdarg); + mmci_writel(host, MMCIARGUMENT, (u32)cmd->cmdarg); + udelay(COMMAND_REG_DELAY); + dev_dbg(host->hw_dev, "SDI_CMD <= 0x%08X\n", sdi_cmd); + + mmci_writel(host, MMCICOMMAND, sdi_cmd); + result = wait_for_command_end(mci, cmd); + + /* After CMD3 open drain is switched off and push pull is used. */ + if ((result == 0) && (cmd->cmdidx == MMC_CMD_SET_RELATIVE_ADDR)) { + u32 sdi_pwr = mmci_readl(host, MMCIPOWER) & ~MCI_OD; + mmci_writel(host, MMCIPOWER, sdi_pwr); + } + + return result; +} + +static u64 mmci_pio_read(struct mmci_host *host, char *buffer, unsigned int host_remain) +{ + void __iomem *base = host->base; + char *ptr = buffer; + u32 status; + struct variant_data *variant = host->variant; + + do { + int count = readl(base + MMCIFIFOCNT) << 2; + + if (count > host_remain) + count = host_remain; + + if (count > variant->fifosize) + count = variant->fifosize; + + if (count <= 0) + break; + + /* + * SDIO especially may want to send something that is + * not divisible by 4 (as opposed to card sectors + * etc). Therefore make sure to always read the last bytes + * while only doing full 32-bit reads towards the FIFO. + */ + if (unlikely(count & 0x3)) { + if (count < 4) { + unsigned char buf[4]; + readsl(base + MMCIFIFO, buf, 1); + memcpy(ptr, buf, count); + } else { + readsl(base + MMCIFIFO, ptr, count >> 2); + count &= ~0x3; + } + } else { + readsl(base + MMCIFIFO, ptr, count >> 2); + } + + ptr += count; + host_remain -= count; + + if (host_remain == 0) + break; + + status = readl(base + MMCISTATUS); + } while (status & MCI_RXDATAAVLBL); + + return ptr - buffer; +} + +static int read_bytes(struct mci_host *mci, char *dest, unsigned int blkcount, unsigned int blksize) +{ + unsigned int xfercount = blkcount * blksize; + struct mmci_host *host = to_mci_host(mci); + u32 status, status_err; + int len; + + dev_dbg(host->hw_dev, "read_bytes: blkcount=%u blksize=%u\n", blkcount, blksize); + + do { + mmci_writel(host, MMCIDATACTRL, mmci_readl(host, MMCIDATACTRL)); + len = mmci_pio_read(host, dest, xfercount); + xfercount -= len; + dest += len; + status = mmci_readl(host, MMCISTATUS); + status_err = status & (MCI_CMDCRCFAIL | MCI_DATATIMEOUT | + MCI_RXOVERRUN); + } while(xfercount && !status_err); + + status_err = status & + (MCI_CMDCRCFAIL | MCI_DATATIMEOUT | MCI_DATABLOCKEND | + MCI_RXOVERRUN); + + while (!status_err) { + status = mmci_readl(host, MMCISTATUS); + status_err = status & + (MCI_CMDCRCFAIL | MCI_DATATIMEOUT | MCI_DATABLOCKEND | + MCI_RXOVERRUN); + } + + if (status & MCI_DATATIMEOUT) { + dev_err(host->hw_dev, "Read data timed out, xfercount: %u, status: 0x%08X\n", + xfercount, status); + return -ETIMEDOUT; + } else if (status & MCI_CMDCRCFAIL) { + dev_err(host->hw_dev, "Read data bytes CRC error: 0x%x\n", status); + return -EILSEQ; + } else if (status & MCI_RXOVERRUN) { + dev_err(host->hw_dev, "Read data RX overflow error\n"); + return -EIO; + } + + mmci_writel(host, MMCICLEAR, MCI_ICR_MASK); + + if (xfercount) { + dev_err(host->hw_dev, "Read data error, xfercount: %u\n", xfercount); + return -ENOBUFS; + } + + return 0; +} + +static int mmci_pio_write(struct mmci_host *host, char *buffer, unsigned int remain, u32 status) +{ + struct variant_data *variant = host->variant; + void __iomem *base = host->base; + char *ptr = buffer; + + do { + unsigned int count, maxcnt; + + maxcnt = status & MCI_TXFIFOEMPTY ? + variant->fifosize : variant->fifohalfsize; + count = min(remain, maxcnt); + + /* + * SDIO especially may want to send something that is + * not divisible by 4 (as opposed to card sectors + * etc), and the FIFO only accept full 32-bit writes. + * So compensate by adding +3 on the count, a single + * byte become a 32bit write, 7 bytes will be two + * 32bit writes etc. + */ + writesl(base + MMCIFIFO, ptr, (count + 3) >> 2); + + ptr += count; + remain -= count; + + if (remain == 0) + break; + + status = readl(base + MMCISTATUS); + } while (status & MCI_TXFIFOHALFEMPTY); + + return ptr - buffer; +} + +static int write_bytes(struct mci_host *mci, char *dest, unsigned int blkcount, unsigned int blksize) +{ + unsigned int xfercount = blkcount * blksize; + struct mmci_host *host = to_mci_host(mci); + u32 status, status_err; + int len; + + dev_dbg(host->hw_dev, "write_bytes: blkcount=%u blksize=%u\n", blkcount, blksize); + + status = mmci_readl(host, MMCISTATUS); + status_err = status & (MCI_CMDCRCFAIL | MCI_DATATIMEOUT); + + do { + len = mmci_pio_write(host, dest, xfercount, status); + xfercount -= len; + dest += len; + + status = mmci_readl(host, MMCISTATUS); + status_err = status & (MCI_CMDCRCFAIL | MCI_DATATIMEOUT); + } while (!status_err && xfercount); + + status_err = status & + (MCI_CMDCRCFAIL | MCI_DATATIMEOUT | MCI_DATABLOCKEND); + while (!status_err) { + status = mmci_readl(host, MMCISTATUS); + status_err = status & + (MCI_CMDCRCFAIL | MCI_DATATIMEOUT | MCI_DATABLOCKEND); + } + + if (status & MCI_DATATIMEOUT) { + dev_err(host->hw_dev, "Write data timed out, xfercount:%u,status:0x%08X\n", + xfercount, status); + return -ETIMEDOUT; + } else if (status & MCI_CMDCRCFAIL) { + dev_err(host->hw_dev, "Write data CRC error\n"); + return -EILSEQ; + } + + mmci_writel(host, MMCICLEAR, MCI_ICR_MASK); + + if (xfercount) { + dev_err(host->hw_dev, "Write data error, xfercount:%u", xfercount); + return -ENOBUFS; + } + + return 0; +} + +static int do_data_transfer(struct mci_host *mci, struct mci_cmd *cmd, struct mci_data *data) +{ + int error = -ETIMEDOUT; + struct mmci_host *host = to_mci_host(mci); + u32 data_ctrl; + u32 data_len = (u32) (data->blocks * data->blocksize); + + if (host->variant->blksz_datactrl16) { + data_ctrl = data->blocksize << 16; + } else { + u32 blksz_bits; + + blksz_bits = ffs(data->blocksize) - 1; + data_ctrl = blksz_bits << 4; + } + data_ctrl |= MCI_DPSM_ENABLE; + + if (data_ctrl & MCI_ST_DPSM_DDRMODE) + dev_dbg(host->hw_dev, "MCI_ST_DPSM_DDRMODE\n"); + + mmci_writel(host, MMCIDATATIMER, MCI_DTIMER_DEFAULT); + mmci_writel(host, MMCIDATALENGTH, data_len); + udelay(DATA_REG_DELAY); + + error = do_command(mci, cmd); + if (error) + return error; + + if (data->flags & MMC_DATA_READ) + data_ctrl |= MCI_DPSM_DIRECTION; + + mmci_writel(host, MMCIDATACTRL ,data_ctrl); + + if (data->flags & MMC_DATA_READ) + error = read_bytes(mci, data->dest, data->blocks, + data->blocksize); + else if (data->flags & MMC_DATA_WRITE) + error = write_bytes(mci, (char *)data->src, data->blocks, + data->blocksize); + + return error; +} + +static int mci_request(struct mci_host *mci, struct mci_cmd *cmd, struct mci_data *data) +{ + int result; + + if (data) + result = do_data_transfer(mci, cmd, data); + else + result = do_command(mci, cmd); + + return result; +} + +/* MMC uses open drain drivers in the enumeration phase */ +static int mci_reset(struct mci_host *mci, struct device_d *mci_dev) +{ + struct mmci_host *host = to_mci_host(mci); + struct variant_data *variant = host->variant; + + u32 pwr = variant->pwrreg_powerup; + + if (variant->signal_direction) { + /* + * The ST Micro variant has some additional bits + * indicating signal direction for the signals in + * the SD/MMC bus and feedback-clock usage. + */ + pwr |= host->plat->sigdir; + } + + if (host->hw_designer != AMBA_VENDOR_ST) { + pwr |= MCI_ROD; + } else { + /* + * The ST Micro variant use the ROD bit for something + * else and only has OD (Open Drain). + */ + pwr |= MCI_OD; + } + + mmci_writel(host, MMCIPOWER, pwr); + return 0; +} + +static void mci_set_ios(struct mci_host *mci, struct mci_ios *ios) +{ + struct mmci_host *host = to_mci_host(mci); + u32 sdi_clkcr; + + sdi_clkcr = mmci_readl(host, MMCICLOCK); + + /* Ramp up the clock rate */ + if (mci->clock) { + u32 clkdiv = 0; + u32 tmp_clock; + + dev_dbg(host->hw_dev, "setting clock and bus width in the host:"); + if (mci->clock >= mci->f_max) { + clkdiv = 0; + mci->clock = mci->f_max; + } else { + clkdiv = (host->mclk / mci->clock) - 2; + } + tmp_clock = host->mclk / (clkdiv + 2); + while (tmp_clock > mci->clock) { + clkdiv++; + tmp_clock = host->mclk / (clkdiv + 2); + } + if (clkdiv > MCI_CLK_CLKDIV_MASK) + clkdiv = MCI_CLK_CLKDIV_MASK; + tmp_clock = host->mclk / (clkdiv + 2); + mci->clock = tmp_clock; + sdi_clkcr &= ~(MCI_CLK_CLKDIV_MASK); + sdi_clkcr |= clkdiv; + } + + /* Set the bus width */ + if (mci->bus_width) { + u32 buswidth = 0; + + switch (mci->bus_width) { + case MMC_BUS_WIDTH_1: + buswidth |= MCI_1BIT_BUS; + break; + case MMC_BUS_WIDTH_4: + buswidth |= MCI_4BIT_BUS; + break; + case MMC_BUS_WIDTH_8: + buswidth |= MCI_ST_8BIT_BUS; + break; + default: + dev_err(host->hw_dev, "Invalid bus width (%d)\n", mci->bus_width); + break; + } + sdi_clkcr &= ~(MCI_xBIT_BUS_MASK); + sdi_clkcr |= buswidth; + } + + mmci_writel(host, MMCICLOCK, sdi_clkcr); + udelay(CLK_CHANGE_DELAY); +} + +static int mmci_probe(struct amba_device *dev, const struct amba_id *id) +{ + struct device_d *hw_dev = &dev->dev; + struct mmci_platform_data *plat = hw_dev->platform_data; + struct variant_data *variant = id->data; + u32 sdi_u32; + struct mmci_host *host; + struct clk *clk; + int ret; + + if (!plat) { + dev_err(hw_dev, "missing platform data\n"); + return -EINVAL; + } + + host = xzalloc(sizeof(*host)); + + host->base = amba_get_mem_region(dev); + host->mci.send_cmd = mci_request; + host->mci.set_ios = mci_set_ios; + host->mci.init = mci_reset; + host->hw_dev = host->mci.hw_dev = hw_dev; + + clk = clk_get(hw_dev, NULL); + if (IS_ERR(clk)) { + ret = PTR_ERR(clk); + goto host_free; + } + + ret = clk_enable(clk); + if (ret) + goto host_free; + + host->hw_designer = amba_manf(dev); + host->hw_revision = amba_rev(dev); + + dev_dbg(hw_dev, "hw_designer = 0x%x\n", host->hw_designer); + dev_dbg(hw_dev, "hw_revision = 0x%x\n", host->hw_revision); + + host->variant = variant; + host->plat = plat; + + mmci_writel(host, MMCIPOWER, plat->sigdir | variant->pwrreg_powerup); + + mmci_writel(host, MMCICLOCK, + plat->clkdiv_init | variant->clkreg_enable | variant->clkreg); + udelay(CLK_CHANGE_DELAY); + + /* Disable mmc interrupts */ + sdi_u32 = mmci_readl(host, MMCIMASK0) & ~MCI_MASK0_MASK; + mmci_writel(host, MMCIMASK0, sdi_u32); + + host->mclk = clk_get_rate(clk); + + /* + * According to the spec, mclk is max 100 MHz, + * so we try to adjust the clock down to this, + * (if possible). + */ + if (host->mclk > 100000000) { + ret = clk_set_rate(clk, 100000000); + if (ret < 0) + goto clk_disable; + host->mclk = clk_get_rate(clk); + dev_dbg(hw_dev, "eventual mclk rate: %lu Hz\n", host->mclk); + } + + /* + * The ARM and ST versions of the block have slightly different + * clock divider equations which means that the minimum divider + * differs too. + */ + if (variant->st_clkdiv) + host->mci.f_min = DIV_ROUND_UP(host->mclk, 257); + else + host->mci.f_min = DIV_ROUND_UP(host->mclk, 512); + /* + * If the platform data supplies a maximum operating + * frequency, this takes precedence. Else, we fall back + * to using the module parameter, which has a (low) + * default value in case it is not specified. Either + * value must not exceed the clock rate into the block, + * of course. + */ + if (plat->f_max) + host->mci.f_max = min(host->mclk, plat->f_max); + else + host->mci.f_max = min(host->mclk, fmax); + dev_dbg(hw_dev, "clocking block at %u Hz\n", host->mci.f_max); + + host->mci.max_req_size = (1 << variant->datalength_bits) - 1; + + host->mci.host_caps = plat->capabilities; + host->mci.voltages = plat->ocr_mask; + + mci_register(&host->mci); + + return 0; + +clk_disable: + clk_disable(clk); +host_free: + free(host); + return ret; +} + +static struct amba_id mmci_ids[] = { + { + .id = 0x00041180, + .mask = 0xff0fffff, + .data = &variant_arm, + }, + { + .id = 0x01041180, + .mask = 0xff0fffff, + .data = &variant_arm_extended_fifo, + }, + { + .id = 0x00041181, + .mask = 0x000fffff, + .data = &variant_arm, + }, + /* ST Micro variants */ + { + .id = 0x00480180, + .mask = 0xf0ffffff, + .data = &variant_ux500, + }, + { + .id = 0x10480180, + .mask = 0xf0ffffff, + .data = &variant_ux500v2, + }, + { 0, 0 }, +}; + +static struct amba_driver mmci_driver = { + .drv = { + .name = DRIVER_NAME, + }, + .probe = mmci_probe, + .id_table = mmci_ids, +}; + +static int mmci_init(void) +{ + amba_driver_register(&mmci_driver); + return 0; +} +device_initcall(mmci_init); diff --git a/drivers/mci/mmci.h b/drivers/mci/mmci.h new file mode 100644 index 0000000..20a31a1 --- /dev/null +++ b/drivers/mci/mmci.h @@ -0,0 +1,167 @@ +/* + * linux/drivers/mmc/host/mmci.h - ARM PrimeCell MMCI PL180/1 driver + * + * Copyright (C) 2003 Deep Blue Solutions, Ltd, 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. + */ + +#define COMMAND_REG_DELAY 300 +#define DATA_REG_DELAY 1000 +#define CLK_CHANGE_DELAY 2000 + +#define MMCIPOWER 0x000 +#define MCI_PWR_OFF 0x00 +#define MCI_PWR_UP 0x02 +#define MCI_PWR_ON 0x03 +#define MCI_OD (1 << 6) +#define MCI_ROD (1 << 7) + +#define MMCICLOCK 0x004 +#define MCI_CLK_CLKDIV_MASK 0x000000FF +#define MCI_CLK_ENABLE (1 << 8) +#define MCI_CLK_PWRSAVE (1 << 9) +#define MCI_CLK_BYPASS (1 << 10) +#define MCI_xBIT_BUS_MASK 0x00001800 +#define MCI_1BIT_BUS (0 << 0) +#define MCI_4BIT_BUS (1 << 11) +/* + * 8bit wide buses, hardware flow contronl, negative edges and clock inversion + * supported in ST Micro U300 and Ux500 versions + */ +#define MCI_ST_8BIT_BUS (1 << 12) +#define MCI_ST_U300_HWFCEN (1 << 13) +#define MCI_ST_UX500_NEG_EDGE (1 << 13) +#define MCI_ST_UX500_HWFCEN (1 << 14) +#define MCI_ST_UX500_CLK_INV (1 << 15) + +#define MMCIARGUMENT 0x008 +#define MMCICOMMAND 0x00c +#define MCI_CPSM_RESPONSE (1 << 6) +#define MCI_CPSM_LONGRSP (1 << 7) +#define MCI_CPSM_INTERRUPT (1 << 8) +#define MCI_CPSM_PENDING (1 << 9) +#define MCI_CPSM_ENABLE (1 << 10) +#define MCI_SDIO_SUSP (1 << 11) +#define MCI_ENCMD_COMPL (1 << 12) +#define MCI_NIEN (1 << 13) +#define MCI_CE_ATACMD (1 << 14) + +#define MMCIRESPCMD 0x010 +#define MMCIRESPONSE0 0x014 +#define MMCIRESPONSE1 0x018 +#define MMCIRESPONSE2 0x01c +#define MMCIRESPONSE3 0x020 +#define MMCIDATATIMER 0x024 +#define MMCIDATALENGTH 0x028 +#define MMCIDATACTRL 0x02c +#define MCI_DPSM_ENABLE (1 << 0) +#define MCI_DPSM_DIRECTION (1 << 1) +#define MCI_DPSM_MODE (1 << 2) +#define MCI_DPSM_DMAENABLE (1 << 3) +#define MCI_DPSM_BLOCKSIZE (1 << 4) +/* Control register extensions in the ST Micro U300 and Ux500 versions */ +#define MCI_ST_DPSM_RWSTART (1 << 8) +#define MCI_ST_DPSM_RWSTOP (1 << 9) +#define MCI_ST_DPSM_RWMOD (1 << 10) +#define MCI_ST_DPSM_SDIOEN (1 << 11) +/* Control register extensions in the ST Micro Ux500 versions */ +#define MCI_ST_DPSM_DMAREQCTL (1 << 12) +#define MCI_ST_DPSM_DBOOTMODEEN (1 << 13) +#define MCI_ST_DPSM_BUSYMODE (1 << 14) +#define MCI_ST_DPSM_DDRMODE (1 << 15) + +#define MCI_DTIMER_DEFAULT 0xFFFF0000 + +#define MMCIDATACNT 0x030 +#define MMCISTATUS 0x034 +#define MCI_CMDCRCFAIL (1 << 0) +#define MCI_DATACRCFAIL (1 << 1) +#define MCI_CMDTIMEOUT (1 << 2) +#define MCI_DATATIMEOUT (1 << 3) +#define MCI_TXUNDERRUN (1 << 4) +#define MCI_RXOVERRUN (1 << 5) +#define MCI_CMDRESPEND (1 << 6) +#define MCI_CMDSENT (1 << 7) +#define MCI_DATAEND (1 << 8) +#define MCI_STARTBITERR (1 << 9) +#define MCI_DATABLOCKEND (1 << 10) +#define MCI_CMDACTIVE (1 << 11) +#define MCI_TXACTIVE (1 << 12) +#define MCI_RXACTIVE (1 << 13) +#define MCI_TXFIFOHALFEMPTY (1 << 14) +#define MCI_RXFIFOHALFFULL (1 << 15) +#define MCI_TXFIFOFULL (1 << 16) +#define MCI_RXFIFOFULL (1 << 17) +#define MCI_TXFIFOEMPTY (1 << 18) +#define MCI_RXFIFOEMPTY (1 << 19) +#define MCI_TXDATAAVLBL (1 << 20) +#define MCI_RXDATAAVLBL (1 << 21) +/* Extended status bits for the ST Micro variants */ +#define MCI_ST_SDIOIT (1 << 22) +#define MCI_ST_CEATAEND (1 << 23) + +#define MMCICLEAR 0x038 +#define MCI_CMDCRCFAILCLR (1 << 0) +#define MCI_DATACRCFAILCLR (1 << 1) +#define MCI_CMDTIMEOUTCLR (1 << 2) +#define MCI_DATATIMEOUTCLR (1 << 3) +#define MCI_TXUNDERRUNCLR (1 << 4) +#define MCI_RXOVERRUNCLR (1 << 5) +#define MCI_CMDRESPENDCLR (1 << 6) +#define MCI_CMDSENTCLR (1 << 7) +#define MCI_DATAENDCLR (1 << 8) +#define MCI_STARTBITERRCLR (1 << 9) +#define MCI_DATABLOCKENDCLR (1 << 10) +/* Extended status bits for the ST Micro variants */ +#define MCI_ST_SDIOITC (1 << 22) +#define MCI_ST_CEATAENDC (1 << 23) + +#define MMCIMASK0 0x03c +#define MCI_MASK0_MASK 0x1FFFFFFF +#define MCI_CMDINDEXMASK 0xFF +#define MCI_ICR_MASK 0x1DC007FF + +#define MCI_CMDCRCFAILMASK (1 << 0) +#define MCI_DATACRCFAILMASK (1 << 1) +#define MCI_CMDTIMEOUTMASK (1 << 2) +#define MCI_DATATIMEOUTMASK (1 << 3) +#define MCI_TXUNDERRUNMASK (1 << 4) +#define MCI_RXOVERRUNMASK (1 << 5) +#define MCI_CMDRESPENDMASK (1 << 6) +#define MCI_CMDSENTMASK (1 << 7) +#define MCI_DATAENDMASK (1 << 8) +#define MCI_STARTBITERRMASK (1 << 9) +#define MCI_DATABLOCKENDMASK (1 << 10) +#define MCI_CMDACTIVEMASK (1 << 11) +#define MCI_TXACTIVEMASK (1 << 12) +#define MCI_RXACTIVEMASK (1 << 13) +#define MCI_TXFIFOHALFEMPTYMASK (1 << 14) +#define MCI_RXFIFOHALFFULLMASK (1 << 15) +#define MCI_TXFIFOFULLMASK (1 << 16) +#define MCI_RXFIFOFULLMASK (1 << 17) +#define MCI_TXFIFOEMPTYMASK (1 << 18) +#define MCI_RXFIFOEMPTYMASK (1 << 19) +#define MCI_TXDATAAVLBLMASK (1 << 20) +#define MCI_RXDATAAVLBLMASK (1 << 21) +/* Extended status bits for the ST Micro variants */ +#define MCI_ST_SDIOITMASK (1 << 22) +#define MCI_ST_CEATAENDMASK (1 << 23) + +#define MMCIMASK1 0x040 +#define MMCIFIFOCNT 0x048 +#define MMCIFIFO 0x080 /* to 0x0bc */ + +#define MCI_IRQENABLE \ + (MCI_CMDCRCFAILMASK|MCI_DATACRCFAILMASK|MCI_CMDTIMEOUTMASK| \ + MCI_DATATIMEOUTMASK|MCI_TXUNDERRUNMASK|MCI_RXOVERRUNMASK| \ + MCI_CMDRESPENDMASK|MCI_CMDSENTMASK|MCI_STARTBITERRMASK) + +/* These interrupts are directed to IRQ1 when two IRQ lines are available */ +#define MCI_IRQ1MASK \ + (MCI_RXFIFOHALFFULLMASK | MCI_RXDATAAVLBLMASK | \ + MCI_TXFIFOHALFEMPTYMASK) + +#define NR_SG 128 diff --git a/include/linux/amba/mmci.h b/include/linux/amba/mmci.h new file mode 100644 index 0000000..0bf5581 --- /dev/null +++ b/include/linux/amba/mmci.h @@ -0,0 +1,42 @@ +/* + * include/linux/amba/mmci.h + */ +#ifndef AMBA_MMCI_H +#define AMBA_MMCI_H + +/* + * These defines is places here due to access is needed from machine + * configuration files. The ST Micro version does not have ROD and + * reuse the voltage registers for direction settings. + */ +#define MCI_ST_DATA2DIREN (1 << 2) +#define MCI_ST_CMDDIREN (1 << 3) +#define MCI_ST_DATA0DIREN (1 << 4) +#define MCI_ST_DATA31DIREN (1 << 5) +#define MCI_ST_FBCLKEN (1 << 7) +#define MCI_ST_DATA74DIREN (1 << 8) + +#define SDI_CLKCR_CLKDIV_INIT 0x000000FD + +/** + * struct mmci_platform_data - platform configuration for the MMCI + * (also known as PL180) block. + * @f_max: the maximum operational frequency for this host in this + * platform configuration. When this is specified it takes precedence + * over the module parameter for the same frequency. + * @ocr_mask: available voltages on the 4 pins from the block, this + * is ignored if a regulator is used, see the MMC_VDD_* masks in + * mmc/host.h + * @capabilities: the capabilities of the block as implemented in + * this platform, signify anything MMC_CAP_* from mmc/host.h + */ +struct mmci_platform_data { + unsigned long f_max; + unsigned int ocr_mask; + unsigned long capabilities; + + uint32_t sigdir; + uint32_t clkdiv_init; +}; + +#endif -- 1.8.4.rc3 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox