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Diffstat (limited to 'target/linux/ubicom32/files/drivers/mmc')
-rw-r--r--target/linux/ubicom32/files/drivers/mmc/host/ubicom32sd.c773
1 files changed, 773 insertions, 0 deletions
diff --git a/target/linux/ubicom32/files/drivers/mmc/host/ubicom32sd.c b/target/linux/ubicom32/files/drivers/mmc/host/ubicom32sd.c
new file mode 100644
index 0000000000..107c92a746
--- /dev/null
+++ b/target/linux/ubicom32/files/drivers/mmc/host/ubicom32sd.c
@@ -0,0 +1,773 @@
+/*
+ * drivers/mmc/host/ubicom32sd.c
+ * Ubicom32 Secure Digital Host Controller Interface driver
+ *
+ * (C) Copyright 2009, Ubicom, Inc.
+ *
+ * This file is part of the Ubicom32 Linux Kernel Port.
+ *
+ * The Ubicom32 Linux Kernel Port 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.
+ *
+ * The Ubicom32 Linux Kernel Port 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 the Ubicom32 Linux Kernel Port. If not,
+ * see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <linux/scatterlist.h>
+#include <linux/leds.h>
+#include <linux/gpio.h>
+#include <linux/mmc/host.h>
+
+#include <asm/ubicom32sd.h>
+
+#define DRIVER_NAME "ubicom32sd"
+
+#define sd_printk(...)
+//#define sd_printk printk
+
+#define SDTIO_VP_VERSION 3
+
+#define SDTIO_MAX_SG_BLOCKS 16
+
+enum sdtio_commands {
+ SDTIO_COMMAND_NOP,
+ SDTIO_COMMAND_SETUP,
+ SDTIO_COMMAND_SETUP_SDIO,
+ SDTIO_COMMAND_EXECUTE,
+ SDTIO_COMMAND_RESET,
+};
+
+#define SDTIO_COMMAND_SHIFT 24
+#define SDTIO_COMMAND_FLAG_STOP_RSP_CRC (1 << 10)
+#define SDTIO_COMMAND_FLAG_STOP_RSP_136 (1 << 9)
+#define SDTIO_COMMAND_FLAG_STOP_RSP (1 << 8)
+#define SDTIO_COMMAND_FLAG_STOP_CMD (1 << 7)
+#define SDTIO_COMMAND_FLAG_DATA_STREAM (1 << 6)
+#define SDTIO_COMMAND_FLAG_DATA_RD (1 << 5)
+#define SDTIO_COMMAND_FLAG_DATA_WR (1 << 4)
+#define SDTIO_COMMAND_FLAG_CMD_RSP_CRC (1 << 3)
+#define SDTIO_COMMAND_FLAG_CMD_RSP_136 (1 << 2)
+#define SDTIO_COMMAND_FLAG_CMD_RSP (1 << 1)
+#define SDTIO_COMMAND_FLAG_CMD (1 << 0)
+
+/*
+ * SDTIO_COMMAND_SETUP_SDIO
+ */
+#define SDTIO_COMMAND_FLAG_SDIO_INT_EN (1 << 0)
+
+/*
+ * SDTIO_COMMAND_SETUP
+ * clock speed in arg
+ */
+#define SDTIO_COMMAND_FLAG_4BIT (1 << 3)
+#define SDTIO_COMMAND_FLAG_1BIT (1 << 2)
+#define SDTIO_COMMAND_FLAG_SET_CLOCK (1 << 1)
+#define SDTIO_COMMAND_FLAG_SET_WIDTH (1 << 0)
+
+#define SDTIO_COMMAND_FLAG_CMD_RSP_MASK (SDTIO_COMMAND_FLAG_CMD_RSP | SDTIO_COMMAND_FLAG_CMD_RSP_136)
+#define SDTIO_COMMAND_FLAG_STOP_RSP_MASK (SDTIO_COMMAND_FLAG_STOP_RSP | SDTIO_COMMAND_FLAG_STOP_RSP_136)
+#define SDTIO_COMMAND_FLAG_RSP_MASK (SDTIO_COMMAND_FLAG_CMD_RSP_MASK | SDTIO_COMMAND_FLAG_STOP_RSP_MASK)
+
+struct sdtio_vp_sg {
+ volatile void *addr;
+ volatile u32_t len;
+};
+
+#define SDTIO_VP_INT_STATUS_DONE (1 << 31)
+#define SDTIO_VP_INT_STATUS_SDIO_INT (1 << 10)
+#define SDTIO_VP_INT_STATUS_DATA_CRC_ERR (1 << 9)
+#define SDTIO_VP_INT_STATUS_DATA_PROG_ERR (1 << 8)
+#define SDTIO_VP_INT_STATUS_DATA_TIMEOUT (1 << 7)
+#define SDTIO_VP_INT_STATUS_STOP_RSP_CRC (1 << 6)
+#define SDTIO_VP_INT_STATUS_STOP_RSP_TIMEOUT (1 << 5)
+#define SDTIO_VP_INT_STATUS_CMD_RSP_CRC (1 << 4)
+#define SDTIO_VP_INT_STATUS_CMD_RSP_TIMEOUT (1 << 3)
+#define SDTIO_VP_INT_STATUS_CMD_TIMEOUT (1 << 2)
+#define SDTIO_VP_INT_STATUS_CARD1_INSERT (1 << 1)
+#define SDTIO_VP_INT_STATUS_CARD0_INSERT (1 << 0)
+
+struct sdtio_vp_regs {
+ u32_t version;
+ u32_t f_max;
+ u32_t f_min;
+
+ volatile u32_t int_status;
+
+ volatile u32_t command;
+ volatile u32_t arg;
+
+ volatile u32_t cmd_opcode;
+ volatile u32_t cmd_arg;
+ volatile u32_t cmd_rsp0;
+ volatile u32_t cmd_rsp1;
+ volatile u32_t cmd_rsp2;
+ volatile u32_t cmd_rsp3;
+
+ volatile u32_t stop_opcode;
+ volatile u32_t stop_arg;
+ volatile u32_t stop_rsp0;
+ volatile u32_t stop_rsp1;
+ volatile u32_t stop_rsp2;
+ volatile u32_t stop_rsp3;
+
+ volatile u32_t data_timeout_ns;
+ volatile u16_t data_blksz;
+ volatile u16_t data_blkct;
+ volatile u32_t data_bytes_transferred;
+ volatile u32_t sg_len;
+ struct sdtio_vp_sg sg[SDTIO_MAX_SG_BLOCKS];
+};
+
+struct ubicom32sd_data {
+ const struct ubicom32sd_platform_data *pdata;
+
+ struct mmc_host *mmc;
+
+ /*
+ * Lock used to protect the data structure
+ spinlock_t lock;
+ */
+ int int_en;
+ int int_pend;
+
+ /*
+ * Receive and transmit interrupts used for communicating
+ * with hardware
+ */
+ int irq_tx;
+ int irq_rx;
+
+ /*
+ * Current outstanding mmc request
+ */
+ struct mmc_request *mrq;
+
+ /*
+ * Hardware registers
+ */
+ struct sdtio_vp_regs *regs;
+};
+
+/*****************************************************************************\
+ * *
+ * Suspend/resume *
+ * *
+\*****************************************************************************/
+
+#if 0//def CONFIG_PM
+
+int ubicom32sd_suspend_host(struct ubicom32sd_host *host, pm_message_t state)
+{
+ int ret;
+
+ ret = mmc_suspend_host(host->mmc, state);
+ if (ret)
+ return ret;
+
+ free_irq(host->irq, host);
+
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(ubicom32sd_suspend_host);
+
+int ubicom32sd_resume_host(struct ubicom32sd_host *host)
+{
+ int ret;
+
+ if (host->flags & UBICOM32SD_USE_DMA) {
+ if (host->ops->enable_dma)
+ host->ops->enable_dma(host);
+ }
+
+ ret = request_irq(host->irq, ubicom32sd_irq, IRQF_SHARED,
+ mmc_hostname(host->mmc), host);
+ if (ret)
+ return ret;
+
+ ubicom32sd_init(host);
+ mmiowb();
+
+ ret = mmc_resume_host(host->mmc);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(ubicom32sd_resume_host);
+
+#endif /* CONFIG_PM */
+
+/*
+ * ubicom32sd_send_command_sync
+ */
+static void ubicom32sd_send_command_sync(struct ubicom32sd_data *ud, u32_t command, u32_t arg)
+{
+ ud->regs->command = command;
+ ud->regs->arg = arg;
+ ubicom32_set_interrupt(ud->irq_tx);
+ while (ud->regs->command) {
+ ndelay(100);
+ }
+}
+
+/*
+ * ubicom32sd_send_command
+ */
+static void ubicom32sd_send_command(struct ubicom32sd_data *ud, u32_t command, u32_t arg)
+{
+ ud->regs->command = command;
+ ud->regs->arg = arg;
+ ubicom32_set_interrupt(ud->irq_tx);
+}
+
+/*
+ * ubicom32sd_reset
+ */
+static void ubicom32sd_reset(struct ubicom32sd_data *ud)
+{
+ ubicom32sd_send_command_sync(ud, SDTIO_COMMAND_RESET << SDTIO_COMMAND_SHIFT, 0);
+ ud->regs->int_status = 0;
+}
+
+/*
+ * ubicom32sd_mmc_request
+ */
+static void ubicom32sd_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
+{
+ struct ubicom32sd_data *ud = (struct ubicom32sd_data *)mmc_priv(mmc);
+ u32_t command = SDTIO_COMMAND_EXECUTE << SDTIO_COMMAND_SHIFT;
+ int ret = 0;
+
+ WARN(ud->mrq != NULL, "ud->mrq still set to %p\n", ud->mrq);
+ //pr_debug("send cmd %08x arg %08x flags %08x\n", cmd->opcode, cmd->arg, cmd->flags);
+
+ if (mrq->cmd) {
+ struct mmc_command *cmd = mrq->cmd;
+
+ sd_printk("%s:\t\t\tsetup cmd %02d arg %08x flags %08x\n", mmc_hostname(mmc), cmd->opcode, cmd->arg, cmd->flags);
+
+ ud->regs->cmd_opcode = cmd->opcode;
+ ud->regs->cmd_arg = cmd->arg;
+
+ command |= SDTIO_COMMAND_FLAG_CMD;
+
+ if (cmd->flags & MMC_RSP_PRESENT) {
+ command |= SDTIO_COMMAND_FLAG_CMD_RSP;
+ }
+
+ if (cmd->flags & MMC_RSP_136) {
+ command |= SDTIO_COMMAND_FLAG_CMD_RSP_136;
+ }
+
+ if (cmd->flags & MMC_RSP_CRC) {
+ command |= SDTIO_COMMAND_FLAG_CMD_RSP_CRC;
+ }
+ }
+
+ if (mrq->data) {
+ struct mmc_data *data = mrq->data;
+ struct scatterlist *sg = data->sg;
+ int i;
+
+printk("%s:\t\t\tsetup data blksz %d num %d sglen=%d fl=%08x Tns=%u\n", mmc_hostname(mmc), data->blksz, data->blocks, data->sg_len, data->flags, data->timeout_ns);
+
+ sd_printk("%s:\t\t\tsetup data blksz %d num %d sglen=%d fl=%08x Tns=%u\n",
+ mmc_hostname(mmc), data->blksz, data->blocks, data->sg_len,
+ data->flags, data->timeout_ns);
+
+ if (data->sg_len > SDTIO_MAX_SG_BLOCKS) {
+ ret = -EINVAL;
+ data->error = -EINVAL;
+ goto fail;
+ }
+
+ ud->regs->data_timeout_ns = data->timeout_ns;
+ ud->regs->data_blksz = data->blksz;
+ ud->regs->data_blkct = data->blocks;
+ ud->regs->sg_len = data->sg_len;
+
+ /*
+ * Load all of our sg list into the driver sg buffer
+ */
+ for (i = 0; i < data->sg_len; i++) {
+ sd_printk("%s: sg %d = %p %d\n", mmc_hostname(mmc), i, sg_virt(sg), sg->length);
+ ud->regs->sg[i].addr = sg_virt(sg);
+ ud->regs->sg[i].len = sg->length;
+ if (((u32_t)ud->regs->sg[i].addr & 0x03) || (sg->length & 0x03)) {
+ sd_printk("%s: Need aligned buffers\n", mmc_hostname(mmc));
+ ret = -EINVAL;
+ data->error = -EINVAL;
+ goto fail;
+ }
+ sg++;
+ }
+ if (data->flags & MMC_DATA_READ) {
+ command |= SDTIO_COMMAND_FLAG_DATA_RD;
+ } else if (data->flags & MMC_DATA_WRITE) {
+ command |= SDTIO_COMMAND_FLAG_DATA_WR;
+ } else if (data->flags & MMC_DATA_STREAM) {
+ command |= SDTIO_COMMAND_FLAG_DATA_STREAM;
+ }
+ }
+
+ if (mrq->stop) {
+ struct mmc_command *stop = mrq->stop;
+ sd_printk("%s: \t\t\tsetup stop %02d arg %08x flags %08x\n", mmc_hostname(mmc), stop->opcode, stop->arg, stop->flags);
+
+ ud->regs->stop_opcode = stop->opcode;
+ ud->regs->stop_arg = stop->arg;
+
+ command |= SDTIO_COMMAND_FLAG_STOP_CMD;
+
+ if (stop->flags & MMC_RSP_PRESENT) {
+ command |= SDTIO_COMMAND_FLAG_STOP_RSP;
+ }
+
+ if (stop->flags & MMC_RSP_136) {
+ command |= SDTIO_COMMAND_FLAG_STOP_RSP_136;
+ }
+
+ if (stop->flags & MMC_RSP_CRC) {
+ command |= SDTIO_COMMAND_FLAG_STOP_RSP_CRC;
+ }
+ }
+
+ ud->mrq = mrq;
+
+ sd_printk("%s: Sending command %08x\n", mmc_hostname(mmc), command);
+
+ ubicom32sd_send_command(ud, command, 0);
+
+ return;
+fail:
+ sd_printk("%s: mmcreq ret = %d\n", mmc_hostname(mmc), ret);
+ mrq->cmd->error = ret;
+ mmc_request_done(mmc, mrq);
+}
+
+/*
+ * ubicom32sd_mmc_set_ios
+ */
+static void ubicom32sd_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
+{
+ struct ubicom32sd_data *ud = (struct ubicom32sd_data *)mmc_priv(mmc);
+ u32_t command = SDTIO_COMMAND_SETUP << SDTIO_COMMAND_SHIFT;
+ u32_t arg = 0;
+ sd_printk("%s: ios call bw:%u pm:%u clk:%u\n", mmc_hostname(mmc), 1 << ios->bus_width, ios->power_mode, ios->clock);
+
+ switch (ios->bus_width) {
+ case MMC_BUS_WIDTH_1:
+ command |= SDTIO_COMMAND_FLAG_SET_WIDTH | SDTIO_COMMAND_FLAG_1BIT;
+ break;
+
+ case MMC_BUS_WIDTH_4:
+ command |= SDTIO_COMMAND_FLAG_SET_WIDTH | SDTIO_COMMAND_FLAG_4BIT;
+ break;
+ }
+
+ if (ios->clock) {
+ arg = ios->clock;
+ command |= SDTIO_COMMAND_FLAG_SET_CLOCK;
+ }
+
+ switch (ios->power_mode) {
+
+ /*
+ * Turn off the SD bus (power + clock)
+ */
+ case MMC_POWER_OFF:
+ gpio_set_value(ud->pdata->cards[0].pin_pwr, !ud->pdata->cards[0].pwr_polarity);
+ command |= SDTIO_COMMAND_FLAG_SET_CLOCK;
+ break;
+
+ /*
+ * Turn on the power to the SD bus
+ */
+ case MMC_POWER_ON:
+ gpio_set_value(ud->pdata->cards[0].pin_pwr, ud->pdata->cards[0].pwr_polarity);
+ break;
+
+ /*
+ * Turn on the clock to the SD bus
+ */
+ case MMC_POWER_UP:
+ /*
+ * Done above
+ */
+ break;
+ }
+
+ ubicom32sd_send_command_sync(ud, command, arg);
+
+ /*
+ * Let the power settle down
+ */
+ udelay(500);
+}
+
+/*
+ * ubicom32sd_mmc_get_cd
+ */
+static int ubicom32sd_mmc_get_cd(struct mmc_host *mmc)
+{
+ struct ubicom32sd_data *ud = (struct ubicom32sd_data *)mmc_priv(mmc);
+ sd_printk("%s: get cd %u %u\n", mmc_hostname(mmc), ud->pdata->cards[0].pin_cd, gpio_get_value(ud->pdata->cards[0].pin_cd));
+
+ return gpio_get_value(ud->pdata->cards[0].pin_cd) ?
+ ud->pdata->cards[0].cd_polarity :
+ !ud->pdata->cards[0].cd_polarity;
+}
+
+/*
+ * ubicom32sd_mmc_get_ro
+ */
+static int ubicom32sd_mmc_get_ro(struct mmc_host *mmc)
+{
+ struct ubicom32sd_data *ud = (struct ubicom32sd_data *)mmc_priv(mmc);
+ sd_printk("%s: get ro %u %u\n", mmc_hostname(mmc), ud->pdata->cards[0].pin_wp, gpio_get_value(ud->pdata->cards[0].pin_wp));
+
+ return gpio_get_value(ud->pdata->cards[0].pin_wp) ?
+ ud->pdata->cards[0].wp_polarity :
+ !ud->pdata->cards[0].wp_polarity;
+}
+
+/*
+ * ubicom32sd_mmc_enable_sdio_irq
+ */
+static void ubicom32sd_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable)
+{
+ struct ubicom32sd_data *ud = (struct ubicom32sd_data *)mmc_priv(mmc);
+
+ ud->int_en = enable;
+ if (enable && ud->int_pend) {
+ ud->int_pend = 0;
+ mmc_signal_sdio_irq(mmc);
+ }
+}
+
+/*
+ * ubicom32sd_interrupt
+ */
+static irqreturn_t ubicom32sd_interrupt(int irq, void *dev)
+{
+ struct mmc_host *mmc = (struct mmc_host *)dev;
+ struct mmc_request *mrq;
+ struct ubicom32sd_data *ud;
+ u32_t int_status;
+
+ if (!mmc) {
+ return IRQ_HANDLED;
+ }
+
+ ud = (struct ubicom32sd_data *)mmc_priv(mmc);
+ if (!ud) {
+ return IRQ_HANDLED;
+ }
+
+ int_status = ud->regs->int_status;
+ ud->regs->int_status &= ~int_status;
+
+ if (int_status & SDTIO_VP_INT_STATUS_SDIO_INT) {
+ if (ud->int_en) {
+ ud->int_pend = 0;
+ mmc_signal_sdio_irq(mmc);
+ } else {
+ ud->int_pend++;
+ }
+ }
+
+ if (!(int_status & SDTIO_VP_INT_STATUS_DONE)) {
+ return IRQ_HANDLED;
+ }
+
+ mrq = ud->mrq;
+ if (!mrq) {
+ sd_printk("%s: Spurious interrupt", mmc_hostname(mmc));
+ return IRQ_HANDLED;
+ }
+ ud->mrq = NULL;
+
+ /*
+ * SDTIO_VP_INT_DONE
+ */
+ if (mrq->cmd->flags & MMC_RSP_PRESENT) {
+ struct mmc_command *cmd = mrq->cmd;
+ cmd->error = 0;
+
+ if ((cmd->flags & MMC_RSP_CRC) && (int_status & SDTIO_VP_INT_STATUS_CMD_RSP_CRC)) {
+ cmd->error = -EILSEQ;
+ } else if (int_status & SDTIO_VP_INT_STATUS_CMD_RSP_TIMEOUT) {
+ cmd->error = -ETIMEDOUT;
+ goto done;
+ } else if (cmd->flags & MMC_RSP_136) {
+ cmd->resp[0] = ud->regs->cmd_rsp0;
+ cmd->resp[1] = ud->regs->cmd_rsp1;
+ cmd->resp[2] = ud->regs->cmd_rsp2;
+ cmd->resp[3] = ud->regs->cmd_rsp3;
+ } else {
+ cmd->resp[0] = ud->regs->cmd_rsp0;
+ }
+ sd_printk("%s:\t\t\tResponse %08x %08x %08x %08x err=%d\n", mmc_hostname(mmc), cmd->resp[0], cmd->resp[1], cmd->resp[2], cmd->resp[3], cmd->error);
+ }
+
+ if (mrq->data) {
+ struct mmc_data *data = mrq->data;
+
+ if (int_status & SDTIO_VP_INT_STATUS_DATA_TIMEOUT) {
+ data->error = -ETIMEDOUT;
+ sd_printk("%s:\t\t\tData Timeout\n", mmc_hostname(mmc));
+ goto done;
+ } else if (int_status & SDTIO_VP_INT_STATUS_DATA_CRC_ERR) {
+ data->error = -EILSEQ;
+ sd_printk("%s:\t\t\tData CRC\n", mmc_hostname(mmc));
+ goto done;
+ } else if (int_status & SDTIO_VP_INT_STATUS_DATA_PROG_ERR) {
+ data->error = -EILSEQ;
+ sd_printk("%s:\t\t\tData Program Error\n", mmc_hostname(mmc));
+ goto done;
+ } else {
+ data->error = 0;
+ data->bytes_xfered = ud->regs->data_bytes_transferred;
+ }
+ }
+
+ if (mrq->stop && (mrq->stop->flags & MMC_RSP_PRESENT)) {
+ struct mmc_command *stop = mrq->stop;
+ stop->error = 0;
+
+ if ((stop->flags & MMC_RSP_CRC) && (int_status & SDTIO_VP_INT_STATUS_STOP_RSP_CRC)) {
+ stop->error = -EILSEQ;
+ } else if (int_status & SDTIO_VP_INT_STATUS_STOP_RSP_TIMEOUT) {
+ stop->error = -ETIMEDOUT;
+ goto done;
+ } else if (stop->flags & MMC_RSP_136) {
+ stop->resp[0] = ud->regs->stop_rsp0;
+ stop->resp[1] = ud->regs->stop_rsp1;
+ stop->resp[2] = ud->regs->stop_rsp2;
+ stop->resp[3] = ud->regs->stop_rsp3;
+ } else {
+ stop->resp[0] = ud->regs->stop_rsp0;
+ }
+ sd_printk("%s:\t\t\tStop Response %08x %08x %08x %08x err=%d\n", mmc_hostname(mmc), stop->resp[0], stop->resp[1], stop->resp[2], stop->resp[3], stop->error);
+ }
+
+done:
+ mmc_request_done(mmc, mrq);
+
+ return IRQ_HANDLED;
+}
+
+static struct mmc_host_ops ubicom32sd_ops = {
+ .request = ubicom32sd_mmc_request,
+ .set_ios = ubicom32sd_mmc_set_ios,
+ .get_ro = ubicom32sd_mmc_get_ro,
+ .get_cd = ubicom32sd_mmc_get_cd,
+ .enable_sdio_irq = ubicom32sd_mmc_enable_sdio_irq,
+};
+
+/*
+ * ubicom32sd_probe
+ */
+static int __devinit ubicom32sd_probe(struct platform_device *pdev)
+{
+ struct ubicom32sd_platform_data *pdata = (struct ubicom32sd_platform_data *)pdev->dev.platform_data;
+ struct mmc_host *mmc;
+ struct ubicom32sd_data *ud;
+ struct resource *res_regs;
+ struct resource *res_irq_tx;
+ struct resource *res_irq_rx;
+ int ret;
+
+ /*
+ * Get our resources, regs is the hardware driver base address
+ * and the tx and rx irqs are used to communicate with the
+ * hardware driver.
+ */
+ res_regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ res_irq_tx = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ res_irq_rx = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
+ if (!res_regs || !res_irq_tx || !res_irq_rx) {
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ /*
+ * Reserve any gpios we need
+ */
+ ret = gpio_request(pdata->cards[0].pin_wp, "sd-wp");
+ if (ret) {
+ goto fail;
+ }
+ gpio_direction_input(pdata->cards[0].pin_wp);
+
+ ret = gpio_request(pdata->cards[0].pin_cd, "sd-cd");
+ if (ret) {
+ goto fail_cd;
+ }
+ gpio_direction_input(pdata->cards[0].pin_cd);
+
+ /*
+ * HACK: for the dual port controller on port F, we don't support the second port right now
+ */
+ if (pdata->ncards > 1) {
+ ret = gpio_request(pdata->cards[1].pin_pwr, "sd-pwr");
+ gpio_direction_output(pdata->cards[1].pin_pwr, !pdata->cards[1].pwr_polarity);
+ gpio_direction_output(pdata->cards[1].pin_pwr, pdata->cards[1].pwr_polarity);
+ }
+
+ ret = gpio_request(pdata->cards[0].pin_pwr, "sd-pwr");
+ if (ret) {
+ goto fail_pwr;
+ }
+ gpio_direction_output(pdata->cards[0].pin_pwr, !pdata->cards[0].pwr_polarity);
+
+ /*
+ * Allocate the MMC driver, it includes memory for our data.
+ */
+ mmc = mmc_alloc_host(sizeof(struct ubicom32sd_data), &pdev->dev);
+ if (!mmc) {
+ ret = -ENOMEM;
+ goto fail_mmc;
+ }
+ ud = (struct ubicom32sd_data *)mmc_priv(mmc);
+ ud->mmc = mmc;
+ ud->pdata = pdata;
+ ud->regs = (struct sdtio_vp_regs *)res_regs->start;
+ ud->irq_tx = res_irq_tx->start;
+ ud->irq_rx = res_irq_rx->start;
+ platform_set_drvdata(pdev, mmc);
+
+ ret = request_irq(ud->irq_rx, ubicom32sd_interrupt, IRQF_DISABLED, mmc_hostname(mmc), mmc);
+ if (ret) {
+ goto fail_mmc;
+ }
+
+ /*
+ * Fill in the mmc structure
+ */
+ mmc->ops = &ubicom32sd_ops;
+ mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_NEEDS_POLL | MMC_CAP_SDIO_IRQ |
+ MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED;
+
+ mmc->f_min = ud->regs->f_min;
+ mmc->f_max = ud->regs->f_max;
+ mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
+
+ /*
+ * Setup some restrictions on transfers
+ *
+ * We allow up to SDTIO_MAX_SG_BLOCKS of data to DMA into, there are
+ * not really any "max_seg_size", "max_req_size", or "max_blk_count"
+ * restrictions (must be less than U32_MAX though), pick
+ * something large?!...
+ *
+ * The hardware can do up to 4095 bytes per block, since the spec
+ * only requires 2048, we'll set it to that and not worry about
+ * potential weird blk lengths.
+ */
+ mmc->max_hw_segs = SDTIO_MAX_SG_BLOCKS;
+ mmc->max_phys_segs = SDTIO_MAX_SG_BLOCKS;
+ mmc->max_seg_size = 1024 * 1024;
+ mmc->max_req_size = 1024 * 1024;
+ mmc->max_blk_count = 1024;
+
+ mmc->max_blk_size = 2048;
+
+ ubicom32sd_reset(ud);
+
+ /*
+ * enable interrupts
+ */
+ ud->int_en = 0;
+ ubicom32sd_send_command_sync(ud, SDTIO_COMMAND_SETUP_SDIO << SDTIO_COMMAND_SHIFT | SDTIO_COMMAND_FLAG_SDIO_INT_EN, 0);
+
+ mmc_add_host(mmc);
+
+ printk(KERN_INFO "%s at %p, irq %d/%d\n", mmc_hostname(mmc),
+ ud->regs, ud->irq_tx, ud->irq_rx);
+ return 0;
+
+fail_mmc:
+ gpio_free(pdata->cards[0].pin_pwr);
+fail_pwr:
+ gpio_free(pdata->cards[0].pin_cd);
+fail_cd:
+ gpio_free(pdata->cards[0].pin_wp);
+fail:
+ return ret;
+}
+
+/*
+ * ubicom32sd_remove
+ */
+static int __devexit ubicom32sd_remove(struct platform_device *pdev)
+{
+ struct mmc_host *mmc = platform_get_drvdata(pdev);
+
+ platform_set_drvdata(pdev, NULL);
+
+ if (mmc) {
+ struct ubicom32sd_data *ud = (struct ubicom32sd_data *)mmc_priv(mmc);
+
+ gpio_free(ud->pdata->cards[0].pin_pwr);
+ gpio_free(ud->pdata->cards[0].pin_cd);
+ gpio_free(ud->pdata->cards[0].pin_wp);
+
+ mmc_remove_host(mmc);
+ mmc_free_host(mmc);
+ }
+
+ /*
+ * Note that our data is allocated as part of the mmc structure
+ * so we don't need to free it.
+ */
+ return 0;
+}
+
+static struct platform_driver ubicom32sd_driver = {
+ .driver = {
+ .name = DRIVER_NAME,
+ .owner = THIS_MODULE,
+ },
+ .probe = ubicom32sd_probe,
+ .remove = __devexit_p(ubicom32sd_remove),
+#if 0
+ .suspend = ubicom32sd_suspend,
+ .resume = ubicom32sd_resume,
+#endif
+};
+
+/*
+ * ubicom32sd_init
+ */
+static int __init ubicom32sd_init(void)
+{
+ return platform_driver_register(&ubicom32sd_driver);
+}
+module_init(ubicom32sd_init);
+
+/*
+ * ubicom32sd_exit
+ */
+static void __exit ubicom32sd_exit(void)
+{
+ platform_driver_unregister(&ubicom32sd_driver);
+}
+module_exit(ubicom32sd_exit);
+
+MODULE_AUTHOR("Patrick Tjin");
+MODULE_DESCRIPTION("Ubicom32 Secure Digital Host Controller Interface driver");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-09 01:22:35 +0000