+++ /dev/null
-/*
- * linux/drivers/mmc/host/glamo-mmc.c - Glamo MMC driver
- *
- * Copyright (C) 2007 Openmoko, Inc, Andy Green <andy@openmoko.com>
- * Based on S3C MMC driver that was:
- * Copyright (C) 2004-2006 maintech GmbH, Thomas Kleffel <tk@maintech.de>
- *
- * 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/module.h>
-#include <linux/mmc/mmc.h>
-#include <linux/mmc/sd.h>
-#include <linux/mmc/host.h>
-#include <linux/platform_device.h>
-#include <linux/irq.h>
-#include <linux/delay.h>
-#include <linux/interrupt.h>
-#include <linux/workqueue.h>
-#include <linux/crc7.h>
-#include <linux/scatterlist.h>
-#include <linux/io.h>
-#include <linux/regulator/consumer.h>
-#include <linux/mfd/glamo.h>
-
-#include "glamo-core.h"
-#include "glamo-regs.h"
-
-#define DRIVER_NAME "glamo-mci"
-
-struct glamo_mci_host {
- struct glamo_mmc_platform_data *pdata;
- struct platform_device *pdev;
- struct glamo_core *core;
- struct mmc_host *mmc;
- struct resource *mmio_mem;
- struct resource *data_mem;
- void __iomem *mmio_base;
- u16 __iomem *data_base;
-
- struct regulator *regulator;
- struct mmc_request *mrq;
-
- unsigned int clk_rate;
-
- unsigned short vdd;
- char power_mode;
-
- unsigned char request_counter;
-
- struct timer_list disable_timer;
-
- struct work_struct irq_work;
- struct work_struct read_work;
-
- unsigned clk_enabled : 1;
-
-};
-
-static void glamo_mci_send_request(struct mmc_host *mmc, struct mmc_request* mrq);
-static void glamo_mci_send_command(struct glamo_mci_host *host,
- struct mmc_command *cmd);
-
-/*
- * Max SD clock rate
- *
- * held at /(3 + 1) due to concerns of 100R recommended series resistor
- * allows 16MHz @ 4-bit --> 8MBytes/sec raw
- *
- * you can override this on kernel commandline using
- *
- * glamo_mci.sd_max_clk=10000000
- *
- * for example
- */
-
-static int sd_max_clk = 21000000;
-module_param(sd_max_clk, int, 0644);
-
-/*
- * Slow SD clock rate
- *
- * you can override this on kernel commandline using
- *
- * glamo_mci.sd_slow_ratio=8
- *
- * for example
- *
- * platform callback is used to decide effective clock rate, if not
- * defined then max is used, if defined and returns nonzero, rate is
- * divided by this factor
- */
-
-static int sd_slow_ratio = 8;
-module_param(sd_slow_ratio, int, 0644);
-
-/*
- * Post-power SD clock rate
- *
- * you can override this on kernel commandline using
- *
- * glamo_mci.sd_post_power_clock=1000000
- *
- * for example
- *
- * After changing power to card, clock is held at this rate until first bulk
- * transfer completes
- */
-
-static int sd_post_power_clock = 1000000;
-module_param(sd_post_power_clock, int, 0644);
-
-
-static inline void glamo_reg_write(struct glamo_mci_host *glamo,
- u_int16_t reg, u_int16_t val)
-{
- writew(val, glamo->mmio_base + reg);
-}
-
-static inline u_int16_t glamo_reg_read(struct glamo_mci_host *glamo,
- u_int16_t reg)
-{
- return readw(glamo->mmio_base + reg);
-}
-
-static void glamo_reg_set_bit_mask(struct glamo_mci_host *glamo,
- u_int16_t reg, u_int16_t mask,
- u_int16_t val)
-{
- u_int16_t tmp;
-
- val &= mask;
-
- tmp = glamo_reg_read(glamo, reg);
- tmp &= ~mask;
- tmp |= val;
- glamo_reg_write(glamo, reg, tmp);
-}
-
-static void glamo_mci_clock_disable(struct glamo_mci_host *host) {
- if (host->clk_enabled) {
- glamo_engine_div_disable(host->core, GLAMO_ENGINE_MMC);
- host->clk_enabled = 0;
- }
-}
-
-static void glamo_mci_clock_enable(struct glamo_mci_host *host) {
- del_timer_sync(&host->disable_timer);
-
- if (!host->clk_enabled) {
- glamo_engine_div_enable(host->core, GLAMO_ENGINE_MMC);
- host->clk_enabled = 1;
- }
-}
-
-static void glamo_mci_disable_timer(unsigned long data) {
- struct glamo_mci_host *host = (struct glamo_mci_host *)data;
- glamo_mci_clock_disable(host);
-}
-
-
-static void do_pio_read(struct glamo_mci_host *host, struct mmc_data *data)
-{
- struct scatterlist *sg;
- u16 __iomem *from_ptr = host->data_base;
- void *sg_pointer;
-
- dev_dbg(&host->pdev->dev, "pio_read():\n");
- for (sg = data->sg; sg; sg = sg_next(sg)) {
- sg_pointer = page_address(sg_page(sg)) + sg->offset;
-
-
- memcpy(sg_pointer, from_ptr, sg->length);
- from_ptr += sg->length >> 1;
-
- data->bytes_xfered += sg->length;
- }
-
- dev_dbg(&host->pdev->dev, "pio_read(): "
- "complete (no more data).\n");
-}
-
-static void do_pio_write(struct glamo_mci_host *host, struct mmc_data *data)
-{
- struct scatterlist *sg;
- u16 __iomem *to_ptr = host->data_base;
- void *sg_pointer;
-
- dev_dbg(&host->pdev->dev, "pio_write():\n");
- for (sg = data->sg; sg; sg = sg_next(sg)) {
- sg_pointer = page_address(sg_page(sg)) + sg->offset;
-
- data->bytes_xfered += sg->length;
-
- memcpy(to_ptr, sg_pointer, sg->length);
- to_ptr += sg->length >> 1;
- }
-
- dev_dbg(&host->pdev->dev, "pio_write(): complete\n");
-}
-
-static int glamo_mci_set_card_clock(struct glamo_mci_host *host, int freq)
-{
- int real_rate = 0;
-
- if (freq) {
- glamo_mci_clock_enable(host);
- real_rate = glamo_engine_reclock(host->core, GLAMO_ENGINE_MMC, freq);
- } else {
- glamo_mci_clock_disable(host);
- }
-
- return real_rate;
-}
-
-static void glamo_mci_request_done(struct glamo_mci_host *host, struct
-mmc_request *mrq) {
- mod_timer(&host->disable_timer, jiffies + HZ / 16);
- mmc_request_done(host->mmc, mrq);
-}
-
-
-static void glamo_mci_irq_worker(struct work_struct *work)
-{
- struct glamo_mci_host *host = container_of(work, struct glamo_mci_host,
- irq_work);
- struct mmc_command *cmd;
- uint16_t status;
- if (!host->mrq || !host->mrq->cmd)
- return;
-
- cmd = host->mrq->cmd;
-
-#if 0
- if (cmd->data->flags & MMC_DATA_READ) {
- return;
- }
-#endif
-
- status = glamo_reg_read(host, GLAMO_REG_MMC_RB_STAT1);
- dev_dbg(&host->pdev->dev, "status = 0x%04x\n", status);
-
- /* we ignore a data timeout report if we are also told the data came */
- if (status & GLAMO_STAT1_MMC_RB_DRDY)
- status &= ~GLAMO_STAT1_MMC_DTOUT;
-
- if (status & (GLAMO_STAT1_MMC_RTOUT | GLAMO_STAT1_MMC_DTOUT))
- cmd->error = -ETIMEDOUT;
- if (status & (GLAMO_STAT1_MMC_BWERR | GLAMO_STAT1_MMC_BRERR)) {
- cmd->error = -EILSEQ;
- }
- if (cmd->error) {
- dev_info(&host->pdev->dev, "Error after cmd: 0x%x\n", status);
- goto done;
- }
-
- /* issue STOP if we have been given one to use */
- if (host->mrq->stop) {
- glamo_mci_send_command(host, host->mrq->stop);
- }
-
- if (cmd->data->flags & MMC_DATA_READ)
- do_pio_read(host, cmd->data);
-
-done:
- host->mrq = NULL;
- glamo_mci_request_done(host, cmd->mrq);
-}
-
-static void glamo_mci_read_worker(struct work_struct *work)
-{
- struct glamo_mci_host *host = container_of(work, struct glamo_mci_host,
- read_work);
- struct mmc_command *cmd;
- uint16_t status;
- uint16_t blocks_ready;
- size_t data_read = 0;
- size_t data_ready;
- struct scatterlist *sg;
- u16 __iomem *from_ptr = host->data_base;
- void *sg_pointer;
-
-
- cmd = host->mrq->cmd;
- sg = cmd->data->sg;
- do {
- status = glamo_reg_read(host, GLAMO_REG_MMC_RB_STAT1);
-
- if (status & (GLAMO_STAT1_MMC_RTOUT | GLAMO_STAT1_MMC_DTOUT))
- cmd->error = -ETIMEDOUT;
- if (status & (GLAMO_STAT1_MMC_BWERR | GLAMO_STAT1_MMC_BRERR))
- cmd->error = -EILSEQ;
- if (cmd->error) {
- dev_info(&host->pdev->dev, "Error after cmd: 0x%x\n", status);
- goto done;
- }
-
- blocks_ready = glamo_reg_read(host, GLAMO_REG_MMC_RB_BLKCNT);
- data_ready = blocks_ready * cmd->data->blksz;
-
- if (data_ready == data_read)
- yield();
-
- while(sg && data_read + sg->length <= data_ready) {
- sg_pointer = page_address(sg_page(sg)) + sg->offset;
- memcpy(sg_pointer, from_ptr, sg->length);
- from_ptr += sg->length >> 1;
-
- data_read += sg->length;
- sg = sg_next(sg);
- }
-
- } while(sg);
- cmd->data->bytes_xfered = data_read;
-
- do {
- status = glamo_reg_read(host, GLAMO_REG_MMC_RB_STAT1);
- } while (!(status & GLAMO_STAT1_MMC_IDLE));
-
- if (host->mrq->stop)
- glamo_mci_send_command(host, host->mrq->stop);
-
- do {
- status = glamo_reg_read(host, GLAMO_REG_MMC_RB_STAT1);
- } while (!(status & GLAMO_STAT1_MMC_IDLE));
-done:
- host->mrq = NULL;
- glamo_mci_request_done(host, cmd->mrq);
-}
-
-static irqreturn_t glamo_mci_irq(int irq, void *devid)
-{
- struct glamo_mci_host *host = (struct glamo_mci_host*)devid;
- schedule_work(&host->irq_work);
-
- return IRQ_HANDLED;
-}
-
-static void glamo_mci_send_command(struct glamo_mci_host *host,
- struct mmc_command *cmd)
-{
- u8 u8a[6];
- u16 fire = 0;
- unsigned int timeout = 1000000;
- u16 * reg_resp = (u16 *)(host->mmio_base + GLAMO_REG_MMC_CMD_RSP1);
- u16 status;
- int triggers_int = 1;
-
- /* if we can't do it, reject as busy */
- if (!glamo_reg_read(host, GLAMO_REG_MMC_RB_STAT1) &
- GLAMO_STAT1_MMC_IDLE) {
- cmd->error = -EBUSY;
- return;
- }
-
- /* create an array in wire order for CRC computation */
- u8a[0] = 0x40 | (cmd->opcode & 0x3f);
- u8a[1] = (u8)(cmd->arg >> 24);
- u8a[2] = (u8)(cmd->arg >> 16);
- u8a[3] = (u8)(cmd->arg >> 8);
- u8a[4] = (u8)cmd->arg;
- u8a[5] = (crc7(0, u8a, 5) << 1) | 0x01; /* crc7 on first 5 bytes of packet */
-
- /* issue the wire-order array including CRC in register order */
- glamo_reg_write(host, GLAMO_REG_MMC_CMD_REG1, ((u8a[4] << 8) | u8a[5]));
- glamo_reg_write(host, GLAMO_REG_MMC_CMD_REG2, ((u8a[2] << 8) | u8a[3]));
- glamo_reg_write(host, GLAMO_REG_MMC_CMD_REG3, ((u8a[0] << 8) | u8a[1]));
-
- /* command index toggle */
- fire |= (host->request_counter & 1) << 12;
-
- /* set type of command */
- switch (mmc_cmd_type(cmd)) {
- case MMC_CMD_BC:
- fire |= GLAMO_FIRE_MMC_CMDT_BNR;
- break;
- case MMC_CMD_BCR:
- fire |= GLAMO_FIRE_MMC_CMDT_BR;
- break;
- case MMC_CMD_AC:
- fire |= GLAMO_FIRE_MMC_CMDT_AND;
- break;
- case MMC_CMD_ADTC:
- fire |= GLAMO_FIRE_MMC_CMDT_AD;
- break;
- }
- /*
- * if it expects a response, set the type expected
- *
- * R1, Length : 48bit, Normal response
- * R1b, Length : 48bit, same R1, but added card busy status
- * R2, Length : 136bit (really 128 bits with CRC snipped)
- * R3, Length : 48bit (OCR register value)
- * R4, Length : 48bit, SDIO_OP_CONDITION, Reverse SDIO Card
- * R5, Length : 48bit, IO_RW_DIRECTION, Reverse SDIO Card
- * R6, Length : 48bit (RCA register)
- * R7, Length : 48bit (interface condition, VHS(voltage supplied),
- * check pattern, CRC7)
- */
- switch (mmc_resp_type(cmd)) {
- case MMC_RSP_R1: /* same index as R6 and R7 */
- fire |= GLAMO_FIRE_MMC_RSPT_R1;
- break;
- case MMC_RSP_R1B:
- fire |= GLAMO_FIRE_MMC_RSPT_R1b;
- break;
- case MMC_RSP_R2:
- fire |= GLAMO_FIRE_MMC_RSPT_R2;
- break;
- case MMC_RSP_R3:
- fire |= GLAMO_FIRE_MMC_RSPT_R3;
- break;
- /* R4 and R5 supported by chip not defined in linux/mmc/core.h (sdio) */
- }
- /*
- * From the command index, set up the command class in the host ctrllr
- *
- * missing guys present on chip but couldn't figure out how to use yet:
- * 0x0 "stream read"
- * 0x9 "cancel running command"
- */
- switch (cmd->opcode) {
- case MMC_READ_SINGLE_BLOCK:
- fire |= GLAMO_FIRE_MMC_CC_SBR; /* single block read */
- break;
- case MMC_SWITCH: /* 64 byte payload */
- case SD_APP_SEND_SCR:
- case MMC_READ_MULTIPLE_BLOCK:
- /* we will get an interrupt off this */
- if (!cmd->mrq->stop)
- /* multiblock no stop */
- fire |= GLAMO_FIRE_MMC_CC_MBRNS;
- else
- /* multiblock with stop */
- fire |= GLAMO_FIRE_MMC_CC_MBRS;
- break;
- case MMC_WRITE_BLOCK:
- fire |= GLAMO_FIRE_MMC_CC_SBW; /* single block write */
- break;
- case MMC_WRITE_MULTIPLE_BLOCK:
- if (cmd->mrq->stop)
- /* multiblock with stop */
- fire |= GLAMO_FIRE_MMC_CC_MBWS;
- else
- /* multiblock NO stop-- 'RESERVED'? */
- fire |= GLAMO_FIRE_MMC_CC_MBWNS;
- break;
- case MMC_STOP_TRANSMISSION:
- fire |= GLAMO_FIRE_MMC_CC_STOP; /* STOP */
- triggers_int = 0;
- break;
- default:
- fire |= GLAMO_FIRE_MMC_CC_BASIC; /* "basic command" */
- triggers_int = 0;
- break;
- }
-
- if (cmd->data)
- host->mrq = cmd->mrq;
-
- /* always largest timeout */
- glamo_reg_write(host, GLAMO_REG_MMC_TIMEOUT, 0xfff);
-
- /* Generate interrupt on txfer */
- glamo_reg_set_bit_mask(host, GLAMO_REG_MMC_BASIC, 0xff36,
- 0x0800 |
- GLAMO_BASIC_MMC_NO_CLK_RD_WAIT |
- GLAMO_BASIC_MMC_EN_COMPL_INT |
- GLAMO_BASIC_MMC_EN_DATA_PUPS |
- GLAMO_BASIC_MMC_EN_CMD_PUP);
-
- /* send the command out on the wire */
- /* dev_info(&host->pdev->dev, "Using FIRE %04X\n", fire); */
- glamo_reg_write(host, GLAMO_REG_MMC_CMD_FIRE, fire);
-
- /* we are deselecting card? because it isn't going to ack then... */
- if ((cmd->opcode == 7) && (cmd->arg == 0))
- return;
-
- /*
- * we must spin until response is ready or timed out
- * -- we don't get interrupts unless there is a bulk rx
- */
- do
- status = glamo_reg_read(host, GLAMO_REG_MMC_RB_STAT1);
- while (((((status >> 15) & 1) != (host->request_counter & 1)) ||
- (!(status & (GLAMO_STAT1_MMC_RB_RRDY |
- GLAMO_STAT1_MMC_RTOUT |
- GLAMO_STAT1_MMC_DTOUT |
- GLAMO_STAT1_MMC_BWERR |
- GLAMO_STAT1_MMC_BRERR)))) && (timeout--));
-
- if ((status & (GLAMO_STAT1_MMC_RTOUT |
- GLAMO_STAT1_MMC_DTOUT)) ||
- (timeout == 0)) {
- cmd->error = -ETIMEDOUT;
- } else if (status & (GLAMO_STAT1_MMC_BWERR | GLAMO_STAT1_MMC_BRERR)) {
- cmd->error = -EILSEQ;
- }
-
- if (cmd->flags & MMC_RSP_PRESENT) {
- if (cmd->flags & MMC_RSP_136) {
- cmd->resp[3] = readw(®_resp[0]) |
- (readw(®_resp[1]) << 16);
- cmd->resp[2] = readw(®_resp[2]) |
- (readw(®_resp[3]) << 16);
- cmd->resp[1] = readw(®_resp[4]) |
- (readw(®_resp[5]) << 16);
- cmd->resp[0] = readw(®_resp[6]) |
- (readw(®_resp[7]) << 16);
- } else {
- cmd->resp[0] = (readw(®_resp[0]) >> 8) |
- (readw(®_resp[1]) << 8) |
- ((readw(®_resp[2])) << 24);
- }
- }
-
-#if 0
- /* We'll only get an interrupt when all data has been transfered.
- By starting to copy data when it's avaiable we can increase throughput by
- up to 30%. */
- if (cmd->data && (cmd->data->flags & MMC_DATA_READ))
- schedule_work(&host->read_work);
-#endif
-
-}
-
-static int glamo_mci_prepare_pio(struct glamo_mci_host *host,
- struct mmc_data *data)
-{
- /* set up the block info */
- glamo_reg_write(host, GLAMO_REG_MMC_DATBLKLEN, data->blksz);
- glamo_reg_write(host, GLAMO_REG_MMC_DATBLKCNT, data->blocks);
-
- data->bytes_xfered = 0;
-
- /* if write, prep the write into the shared RAM before the command */
- if (data->flags & MMC_DATA_WRITE) {
- do_pio_write(host, data);
- }
-
- dev_dbg(&host->pdev->dev, "(blksz=%d, count=%d)\n",
- data->blksz, data->blocks);
- return 0;
-}
-
-static int glamo_mci_irq_poll(struct glamo_mci_host *host,
- struct mmc_command *cmd)
-{
- int timeout = 1000000;
- /*
- * if the glamo INT# line isn't wired (*cough* it can happen)
- * I'm afraid we have to spin on the IRQ status bit and "be
- * our own INT# line"
- */
- /*
- * we have faith we will get an "interrupt"...
- * but something insane like suspend problems can mean
- * we spin here forever, so we timeout after a LONG time
- */
- while ((!(readw(host->core->base +
- GLAMO_REG_IRQ_STATUS) & GLAMO_IRQ_MMC)) &&
- (timeout--));
-
- if (timeout < 0) {
- if (cmd->data->error)
- cmd->data->error = -ETIMEDOUT;
- dev_err(&host->pdev->dev, "Payload timeout\n");
- return -ETIMEDOUT;
- }
- /* ack this interrupt source */
- writew(GLAMO_IRQ_MMC, host->core->base +
- GLAMO_REG_IRQ_CLEAR);
-
- /* yay we are an interrupt controller! -- call the ISR
- * it will stop clock to card
- */
- glamo_mci_irq(IRQ_GLAMO(GLAMO_IRQIDX_MMC), host);
-
- return 0;
-}
-
-static void glamo_mci_send_request(struct mmc_host *mmc, struct mmc_request *mrq)
-{
- struct glamo_mci_host *host = mmc_priv(mmc);
- struct mmc_command *cmd = mrq->cmd;
-
- glamo_mci_clock_enable(host);
- host->request_counter++;
- if (cmd->data) {
- if(glamo_mci_prepare_pio(host, cmd->data)) {
- cmd->error = -EIO;
- cmd->data->error = -EIO;
- goto done;
- }
- }
-
- dev_dbg(&host->pdev->dev,"cmd 0x%x, "
- "arg 0x%x data=%p mrq->stop=%p flags 0x%x\n",
- cmd->opcode, cmd->arg, cmd->data, cmd->mrq->stop,
- cmd->flags);
-
- glamo_mci_send_command(host, cmd);
-
- /*
- * if we don't have bulk data to take care of, we're done
- */
- if (!cmd->data || cmd->error)
- goto done;
-
-
- if (!host->core->irq_works) {
- if (glamo_mci_irq_poll(host, mrq->cmd))
- goto done;
- }
-
- /*
- * Otherwise can can use the interrupt as async completion --
- * if there is read data coming, or we wait for write data to complete,
- * exit without mmc_request_done() as the payload interrupt
- * will service it
- */
- dev_dbg(&host->pdev->dev, "Waiting for payload data\n");
- return;
-done:
- glamo_mci_request_done(host, mrq);
-}
-
-static void glamo_mci_set_power_mode(struct glamo_mci_host *host,
- unsigned char power_mode) {
- int ret;
-
- if (power_mode == host->power_mode)
- return;
-
- switch(power_mode) {
- case MMC_POWER_UP:
- if (host->power_mode == MMC_POWER_OFF) {
- ret = regulator_enable(host->regulator);
- if (ret)
- dev_err(&host->pdev->dev, "Failed to enable regulator: %d\n", ret);
- }
- break;
- case MMC_POWER_ON:
- break;
- case MMC_POWER_OFF:
- default:
- glamo_engine_disable(host->core,
- GLAMO_ENGINE_MMC);
-
- ret = regulator_disable(host->regulator);
- if (ret)
- dev_warn(&host->pdev->dev, "Failed to disable regulator: %d\n", ret);
- break;
- }
- host->power_mode = power_mode;
-}
-
-static void glamo_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
-{
- struct glamo_mci_host *host = mmc_priv(mmc);
- int bus_width = 0;
- int rate;
- int sd_drive;
- int ret;
-
- /* Set power */
- glamo_mci_set_power_mode(host, ios->power_mode);
-
- if (host->vdd != ios->vdd) {
- ret = mmc_regulator_set_ocr(host->regulator, ios->vdd);
- if (ret)
- dev_err(&host->pdev->dev, "Failed to set regulator voltage: %d\n", ret);
- else
- host->vdd = ios->vdd;
- }
- rate = glamo_mci_set_card_clock(host, ios->clock);
-
- if ((ios->power_mode == MMC_POWER_ON) ||
- (ios->power_mode == MMC_POWER_UP)) {
- dev_info(&host->pdev->dev,
- "powered (vdd = %hu) clk: %dkHz div=%hu (req: %ukHz). "
- "Bus width=%d\n", ios->vdd,
- rate / 1000, 0,
- ios->clock / 1000, (int)ios->bus_width);
- } else {
- dev_info(&host->pdev->dev, "glamo_mci_set_ios: power down.\n");
- }
-
- /* set bus width */
- if (ios->bus_width == MMC_BUS_WIDTH_4)
- bus_width = GLAMO_BASIC_MMC_EN_4BIT_DATA;
-
- sd_drive = (rate * 4) / host->clk_rate;
- if (sd_drive > 3)
- sd_drive = 3;
-
- glamo_reg_set_bit_mask(host, GLAMO_REG_MMC_BASIC,
- GLAMO_BASIC_MMC_EN_4BIT_DATA | 0xb0,
- bus_width | sd_drive << 6);
-}
-
-
-/*
- * no physical write protect supported by us
- */
-static int glamo_mci_get_ro(struct mmc_host *mmc)
-{
- return 0;
-}
-
-static struct mmc_host_ops glamo_mci_ops = {
- .request = glamo_mci_send_request,
- .set_ios = glamo_mci_set_ios,
- .get_ro = glamo_mci_get_ro,
-};
-
-static int glamo_mci_probe(struct platform_device *pdev)
-{
- struct mmc_host *mmc;
- struct glamo_mci_host *host;
- struct glamo_core *core = dev_get_drvdata(pdev->dev.parent);
- int ret;
-
- dev_info(&pdev->dev, "glamo_mci driver (C)2007 Openmoko, Inc\n");
-
- mmc = mmc_alloc_host(sizeof(struct glamo_mci_host), &pdev->dev);
- if (!mmc) {
- ret = -ENOMEM;
- goto probe_out;
- }
-
- host = mmc_priv(mmc);
- host->mmc = mmc;
- host->pdev = pdev;
- if (core->pdata)
- host->pdata = core->pdata->mmc_data;
- host->power_mode = MMC_POWER_OFF;
- host->clk_enabled = 0;
- host->core = core;
-
- INIT_WORK(&host->irq_work, glamo_mci_irq_worker);
- INIT_WORK(&host->read_work, glamo_mci_read_worker);
-
- host->regulator = regulator_get(pdev->dev.parent, "SD_3V3");
- if (!host->regulator) {
- dev_err(&pdev->dev, "Cannot proceed without regulator.\n");
- ret = -ENODEV;
- goto probe_free_host;
- }
-
- host->mmio_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!host->mmio_mem) {
- dev_err(&pdev->dev,
- "failed to get io memory region resouce.\n");
- ret = -ENOENT;
- goto probe_regulator_put;
- }
-
- host->mmio_mem = request_mem_region(host->mmio_mem->start,
- resource_size(host->mmio_mem),
- pdev->name);
-
- if (!host->mmio_mem) {
- dev_err(&pdev->dev, "failed to request io memory region.\n");
- ret = -ENOENT;
- goto probe_regulator_put;
- }
-
- host->mmio_base = ioremap(host->mmio_mem->start,
- resource_size(host->mmio_mem));
- if (!host->mmio_base) {
- dev_err(&pdev->dev, "failed to ioremap() io memory region.\n");
- ret = -EINVAL;
- goto probe_free_mem_region_mmio;
- }
-
-
- /* Get ahold of our data buffer we use for data in and out on MMC */
- host->data_mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
- if (!host->data_mem) {
- dev_err(&pdev->dev,
- "failed to get io memory region resource.\n");
- ret = -ENOENT;
- goto probe_iounmap_mmio;
- }
-
- host->data_mem = request_mem_region(host->data_mem->start,
- resource_size(host->data_mem),
- pdev->name);
-
- if (!host->data_mem) {
- dev_err(&pdev->dev, "failed to request io memory region.\n");
- ret = -ENOENT;
- goto probe_iounmap_mmio;
- }
- host->data_base = ioremap(host->data_mem->start,
- resource_size(host->data_mem));
-
- if (host->data_base == 0) {
- dev_err(&pdev->dev, "failed to ioremap() io memory region.\n");
- ret = -EINVAL;
- goto probe_free_mem_region_data;
- }
-
- ret = request_irq(IRQ_GLAMO(GLAMO_IRQIDX_MMC), glamo_mci_irq, IRQF_SHARED,
- pdev->name, host);
- if (ret) {
- dev_err(&pdev->dev, "failed to register irq.\n");
- goto probe_iounmap_data;
- }
-
-
- host->vdd = 0;
- host->clk_rate = glamo_pll_rate(host->core, GLAMO_PLL1);
-
- /* explain our host controller capabilities */
- mmc->ops = &glamo_mci_ops;
- mmc->ocr_avail = mmc_regulator_get_ocrmask(host->regulator);
- mmc->caps = MMC_CAP_4_BIT_DATA |
- MMC_CAP_MMC_HIGHSPEED |
- MMC_CAP_SD_HIGHSPEED;
- mmc->f_min = host->clk_rate / 256;
- mmc->f_max = sd_max_clk;
-
- mmc->max_blk_count = (1 << 16) - 1; /* GLAMO_REG_MMC_RB_BLKCNT */
- mmc->max_blk_size = (1 << 12) - 1; /* GLAMO_REG_MMC_RB_BLKLEN */
- mmc->max_req_size = resource_size(host->data_mem);
- mmc->max_seg_size = mmc->max_req_size;
- mmc->max_phys_segs = 128;
- mmc->max_hw_segs = 128;
-
- if (mmc->ocr_avail < 0) {
- dev_warn(&pdev->dev, "Failed to get ocr list for regulator: %d.\n",
- mmc->ocr_avail);
- mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
- }
-
- platform_set_drvdata(pdev, mmc);
-
- glamo_engine_enable(host->core, GLAMO_ENGINE_MMC);
- glamo_engine_reset(host->core, GLAMO_ENGINE_MMC);
-
- glamo_reg_write(host, GLAMO_REG_MMC_WDATADS1,
- (u16)(host->data_mem->start));
- glamo_reg_write(host, GLAMO_REG_MMC_WDATADS2,
- (u16)(host->data_mem->start >> 16));
-
- glamo_reg_write(host, GLAMO_REG_MMC_RDATADS1,
- (u16)(host->data_mem->start));
- glamo_reg_write(host, GLAMO_REG_MMC_RDATADS2,
- (u16)(host->data_mem->start >> 16));
-
- setup_timer(&host->disable_timer, glamo_mci_disable_timer,
- (unsigned long)host);
-
- if ((ret = mmc_add_host(mmc))) {
- dev_err(&pdev->dev, "failed to add mmc host.\n");
- goto probe_freeirq;
- }
-
- dev_info(&pdev->dev,"initialisation done.\n");
- return 0;
-
-probe_freeirq:
- free_irq(IRQ_GLAMO(GLAMO_IRQIDX_MMC), host);
-probe_iounmap_data:
- iounmap(host->data_base);
-probe_free_mem_region_data:
- release_mem_region(host->data_mem->start, resource_size(host->data_mem));
-probe_iounmap_mmio:
- iounmap(host->mmio_base);
-probe_free_mem_region_mmio:
- release_mem_region(host->mmio_mem->start, resource_size(host->mmio_mem));
-probe_regulator_put:
- regulator_put(host->regulator);
-probe_free_host:
- mmc_free_host(mmc);
-probe_out:
- return ret;
-}
-
-static int glamo_mci_remove(struct platform_device *pdev)
-{
- struct mmc_host *mmc = platform_get_drvdata(pdev);
- struct glamo_mci_host *host = mmc_priv(mmc);
-
- free_irq(IRQ_GLAMO(GLAMO_IRQIDX_MMC), host);
-
- mmc_remove_host(mmc);
- iounmap(host->mmio_base);
- iounmap(host->data_base);
- release_mem_region(host->mmio_mem->start, resource_size(host->mmio_mem));
- release_mem_region(host->data_mem->start, resource_size(host->data_mem));
-
- regulator_put(host->regulator);
-
- mmc_free_host(mmc);
-
- glamo_engine_disable(host->core, GLAMO_ENGINE_MMC);
- return 0;
-}
-
-
-#ifdef CONFIG_PM
-
-static int glamo_mci_suspend(struct device *dev)
-{
- struct mmc_host *mmc = dev_get_drvdata(dev);
- struct glamo_mci_host *host = mmc_priv(mmc);
- int ret;
-
- cancel_work_sync(&host->irq_work);
-
- ret = mmc_suspend_host(mmc, PMSG_SUSPEND);
- glamo_mci_clock_enable(host);
-
- return ret;
-}
-
-static int glamo_mci_resume(struct device *dev)
-{
- struct mmc_host *mmc = dev_get_drvdata(dev);
- struct glamo_mci_host *host = mmc_priv(mmc);
- int ret;
-
- glamo_engine_enable(host->core, GLAMO_ENGINE_MMC);
- glamo_engine_reset(host->core, GLAMO_ENGINE_MMC);
-
- glamo_reg_write(host, GLAMO_REG_MMC_WDATADS1,
- (u16)(host->data_mem->start));
- glamo_reg_write(host, GLAMO_REG_MMC_WDATADS2,
- (u16)(host->data_mem->start >> 16));
-
- glamo_reg_write(host, GLAMO_REG_MMC_RDATADS1,
- (u16)(host->data_mem->start));
- glamo_reg_write(host, GLAMO_REG_MMC_RDATADS2,
- (u16)(host->data_mem->start >> 16));
- mdelay(5);
-
- ret = mmc_resume_host(host->mmc);
-/* glamo_mci_clock_disable(host);*/
-
- return 0;
-}
-
-static struct dev_pm_ops glamo_mci_pm_ops = {
- .suspend = glamo_mci_suspend,
- .resume = glamo_mci_resume,
-};
-#define GLAMO_MCI_PM_OPS (&glamo_mci_pm_ops)
-
-#else /* CONFIG_PM */
-#define GLAMO_MCI_PM_OPS NULL
-#endif /* CONFIG_PM */
-
-
-static struct platform_driver glamo_mci_driver =
-{
- .probe = glamo_mci_probe,
- .remove = glamo_mci_remove,
- .driver = {
- .name = "glamo-mci",
- .owner = THIS_MODULE,
- .pm = GLAMO_MCI_PM_OPS,
- },
-};
-
-static int __init glamo_mci_init(void)
-{
- platform_driver_register(&glamo_mci_driver);
- return 0;
-}
-
-static void __exit glamo_mci_exit(void)
-{
- platform_driver_unregister(&glamo_mci_driver);
-}
-
-module_init(glamo_mci_init);
-module_exit(glamo_mci_exit);
-
-MODULE_DESCRIPTION("Glamo MMC/SD Card Interface driver");
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Andy Green <andy@openmoko.com>");
projects / openwrt / openwrt.git / blobdiff