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![Greg Kroah-Hartman](/assets/img/avatar_default.png)
Use the in-kernel u32 type instead. Cc: Mikko Virkkilä <mikko.virkkila@bluegiga.com> Cc: Lauri Hintsala <Lauri.Hintsala@bluegiga.com> Cc: Riku Mettälä <riku.mettala@bluegiga.com> Cc: Veli-Pekka Peltola <veli-pekka.peltola@bluegiga.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1340 lines
34 KiB
C
1340 lines
34 KiB
C
/*
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* ---------------------------------------------------------------------------
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*
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* FILE: sdio_mmc.c
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*
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* PURPOSE: SDIO driver interface for generic MMC stack.
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*
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* Copyright (C) 2008-2009 by Cambridge Silicon Radio Ltd.
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*
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* ---------------------------------------------------------------------------
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/mutex.h>
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#include <linux/gfp.h>
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#include <linux/mmc/core.h>
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#include <linux/mmc/card.h>
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#include <linux/mmc/host.h>
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#include <linux/mmc/sdio_func.h>
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#include <linux/mmc/sdio_ids.h>
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#include <linux/mmc/sdio.h>
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#include <linux/suspend.h>
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#include "unifi_priv.h"
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#ifdef ANDROID_BUILD
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struct wake_lock unifi_sdio_wake_lock; /* wakelock to prevent suspend while resuming */
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#endif
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static CsrSdioFunctionDriver *sdio_func_drv;
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32)
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#ifdef CONFIG_PM
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static int uf_sdio_mmc_power_event(struct notifier_block *this, unsigned long event, void *ptr);
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#endif
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/*
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* We need to keep track of the power on/off because we can not call
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* mmc_power_restore_host() when the card is already powered.
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* Even then, we need to patch the MMC driver to add a power_restore handler
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* in the mmc_sdio_ops structure. If the MMC driver before 2.6.37 is not patched,
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* mmc_power_save_host() and mmc_power_restore_host() are no-ops in the kernel,
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* returning immediately (at least on x86).
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*/
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static int card_is_powered = 1;
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#endif /* 2.6.32 */
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/* MMC uses ENOMEDIUM to indicate card gone away */
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static CsrResult
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ConvertSdioToCsrSdioResult(int r)
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{
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CsrResult csrResult = CSR_RESULT_FAILURE;
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switch (r) {
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case 0:
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csrResult = CSR_RESULT_SUCCESS;
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break;
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case -EIO:
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case -EILSEQ:
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csrResult = CSR_SDIO_RESULT_CRC_ERROR;
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break;
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/* Timeout errors */
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case -ETIMEDOUT:
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case -EBUSY:
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csrResult = CSR_SDIO_RESULT_TIMEOUT;
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break;
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case -ENODEV:
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case -ENOMEDIUM:
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csrResult = CSR_SDIO_RESULT_NO_DEVICE;
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break;
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case -EINVAL:
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csrResult = CSR_SDIO_RESULT_INVALID_VALUE;
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break;
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case -ENOMEM:
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case -ENOSYS:
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case -ERANGE:
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case -ENXIO:
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csrResult = CSR_RESULT_FAILURE;
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break;
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default:
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unifi_warning(NULL, "Unrecognised SDIO error code: %d\n", r);
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break;
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}
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return csrResult;
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}
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static int
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csr_io_rw_direct(struct mmc_card *card, int write, uint8_t fn,
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uint32_t addr, uint8_t in, uint8_t* out)
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{
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struct mmc_command cmd;
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int err;
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BUG_ON(!card);
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BUG_ON(fn > 7);
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memset(&cmd, 0, sizeof(struct mmc_command));
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cmd.opcode = SD_IO_RW_DIRECT;
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cmd.arg = write ? 0x80000000 : 0x00000000;
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cmd.arg |= fn << 28;
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cmd.arg |= (write && out) ? 0x08000000 : 0x00000000;
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cmd.arg |= addr << 9;
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cmd.arg |= in;
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cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_AC;
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err = mmc_wait_for_cmd(card->host, &cmd, 0);
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if (err)
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return err;
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/* this function is not exported, so we will need to sort it out here
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* for now, lets hard code it to sdio */
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if (0) {
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/* old arg (mmc_host_is_spi(card->host)) { */
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/* host driver already reported errors */
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} else {
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if (cmd.resp[0] & R5_ERROR) {
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printk(KERN_ERR "%s: r5 error 0x%02x\n",
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__FUNCTION__, cmd.resp[0]);
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return -EIO;
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}
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if (cmd.resp[0] & R5_FUNCTION_NUMBER)
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return -EINVAL;
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if (cmd.resp[0] & R5_OUT_OF_RANGE)
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return -ERANGE;
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}
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if (out) {
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if (0) { /* old argument (mmc_host_is_spi(card->host)) */
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*out = (cmd.resp[0] >> 8) & 0xFF;
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}
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else {
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*out = cmd.resp[0] & 0xFF;
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}
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}
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return CSR_RESULT_SUCCESS;
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}
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CsrResult
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CsrSdioRead8(CsrSdioFunction *function, u32 address, u8 *data)
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{
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struct sdio_func *func = (struct sdio_func *)function->priv;
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int err = 0;
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_sdio_claim_host(func);
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*data = sdio_readb(func, address, &err);
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_sdio_release_host(func);
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if (err) {
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func_exit_r(err);
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return ConvertSdioToCsrSdioResult(err);
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}
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return CSR_RESULT_SUCCESS;
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} /* CsrSdioRead8() */
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CsrResult
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CsrSdioWrite8(CsrSdioFunction *function, u32 address, u8 data)
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{
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struct sdio_func *func = (struct sdio_func *)function->priv;
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int err = 0;
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_sdio_claim_host(func);
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sdio_writeb(func, data, address, &err);
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_sdio_release_host(func);
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if (err) {
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func_exit_r(err);
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return ConvertSdioToCsrSdioResult(err);
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}
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return CSR_RESULT_SUCCESS;
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} /* CsrSdioWrite8() */
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CsrResult
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CsrSdioRead16(CsrSdioFunction *function, u32 address, u16 *data)
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{
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struct sdio_func *func = (struct sdio_func *)function->priv;
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int err;
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uint8_t b0, b1;
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_sdio_claim_host(func);
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b0 = sdio_readb(func, address, &err);
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if (err) {
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_sdio_release_host(func);
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return ConvertSdioToCsrSdioResult(err);
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}
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b1 = sdio_readb(func, address+1, &err);
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if (err) {
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_sdio_release_host(func);
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return ConvertSdioToCsrSdioResult(err);
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}
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_sdio_release_host(func);
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*data = ((uint16_t)b1 << 8) | b0;
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return CSR_RESULT_SUCCESS;
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} /* CsrSdioRead16() */
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CsrResult
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CsrSdioWrite16(CsrSdioFunction *function, u32 address, u16 data)
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{
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struct sdio_func *func = (struct sdio_func *)function->priv;
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int err;
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uint8_t b0, b1;
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_sdio_claim_host(func);
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b1 = (data >> 8) & 0xFF;
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sdio_writeb(func, b1, address+1, &err);
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if (err) {
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_sdio_release_host(func);
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return ConvertSdioToCsrSdioResult(err);
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}
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b0 = data & 0xFF;
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sdio_writeb(func, b0, address, &err);
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if (err) {
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_sdio_release_host(func);
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return ConvertSdioToCsrSdioResult(err);
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}
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_sdio_release_host(func);
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return CSR_RESULT_SUCCESS;
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} /* CsrSdioWrite16() */
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CsrResult
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CsrSdioF0Read8(CsrSdioFunction *function, u32 address, u8 *data)
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{
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struct sdio_func *func = (struct sdio_func *)function->priv;
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int err = 0;
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_sdio_claim_host(func);
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#ifdef MMC_QUIRK_LENIENT_FN0
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*data = sdio_f0_readb(func, address, &err);
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#else
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err = csr_io_rw_direct(func->card, 0, 0, address, 0, data);
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#endif
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_sdio_release_host(func);
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if (err) {
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func_exit_r(err);
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return ConvertSdioToCsrSdioResult(err);
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}
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return CSR_RESULT_SUCCESS;
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} /* CsrSdioF0Read8() */
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CsrResult
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CsrSdioF0Write8(CsrSdioFunction *function, u32 address, u8 data)
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{
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struct sdio_func *func = (struct sdio_func *)function->priv;
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int err = 0;
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_sdio_claim_host(func);
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#ifdef MMC_QUIRK_LENIENT_FN0
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sdio_f0_writeb(func, data, address, &err);
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#else
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err = csr_io_rw_direct(func->card, 1, 0, address, data, NULL);
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#endif
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_sdio_release_host(func);
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if (err) {
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func_exit_r(err);
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return ConvertSdioToCsrSdioResult(err);
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}
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return CSR_RESULT_SUCCESS;
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} /* CsrSdioF0Write8() */
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CsrResult
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CsrSdioRead(CsrSdioFunction *function, u32 address, void *data, u32 length)
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{
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struct sdio_func *func = (struct sdio_func *)function->priv;
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int err;
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_sdio_claim_host(func);
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err = sdio_readsb(func, data, address, length);
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_sdio_release_host(func);
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if (err) {
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func_exit_r(err);
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return ConvertSdioToCsrSdioResult(err);
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}
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return CSR_RESULT_SUCCESS;
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} /* CsrSdioRead() */
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CsrResult
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CsrSdioWrite(CsrSdioFunction *function, u32 address, const void *data, u32 length)
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{
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struct sdio_func *func = (struct sdio_func *)function->priv;
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int err;
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_sdio_claim_host(func);
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err = sdio_writesb(func, address, (void*)data, length);
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_sdio_release_host(func);
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if (err) {
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func_exit_r(err);
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return ConvertSdioToCsrSdioResult(err);
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}
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return CSR_RESULT_SUCCESS;
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} /* CsrSdioWrite() */
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static int
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csr_sdio_enable_hs(struct mmc_card *card)
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{
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int ret;
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u8 speed;
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if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED)) {
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/* We've asked for HS clock rates, but controller doesn't
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* claim to support it. We should limit the clock
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* to 25MHz via module parameter.
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*/
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printk(KERN_INFO "unifi: request HS but not MMC_CAP_SD_HIGHSPEED");
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return 0;
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}
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if (!card->cccr.high_speed)
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return 0;
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#if 1
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ret = csr_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed);
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if (ret)
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return ret;
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speed |= SDIO_SPEED_EHS;
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#else
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/* Optimisation: Eliminate read by always assuming SHS and that reserved bits can be zero */
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speed = SDIO_SPEED_EHS | SDIO_SPEED_SHS;
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#endif
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ret = csr_io_rw_direct(card, 1, 0, SDIO_CCCR_SPEED, speed, NULL);
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if (ret)
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return ret;
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mmc_card_set_highspeed(card);
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card->host->ios.timing = MMC_TIMING_SD_HS;
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card->host->ops->set_ios(card->host, &card->host->ios);
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return 0;
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}
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static int
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csr_sdio_disable_hs(struct mmc_card *card)
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{
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int ret;
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u8 speed;
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if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED))
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return 0;
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if (!card->cccr.high_speed)
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return 0;
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#if 1
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ret = csr_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed);
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if (ret)
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return ret;
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speed &= ~SDIO_SPEED_EHS;
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#else
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/* Optimisation: Eliminate read by always assuming SHS and that reserved bits can be zero */
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speed = SDIO_SPEED_SHS; /* clear SDIO_SPEED_EHS */
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#endif
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ret = csr_io_rw_direct(card, 1, 0, SDIO_CCCR_SPEED, speed, NULL);
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if (ret)
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return ret;
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card->state &= ~MMC_STATE_HIGHSPEED;
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card->host->ios.timing = MMC_TIMING_LEGACY;
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card->host->ops->set_ios(card->host, &card->host->ios);
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return 0;
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}
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/*
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* ---------------------------------------------------------------------------
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* CsrSdioMaxBusClockFrequencySet
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*
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* Set the maximum SDIO bus clock speed to use.
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*
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* Arguments:
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* sdio SDIO context pointer
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* maxFrequency maximum clock speed in Hz
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*
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* Returns:
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* an error code.
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* ---------------------------------------------------------------------------
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*/
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CsrResult
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CsrSdioMaxBusClockFrequencySet(CsrSdioFunction *function, u32 maxFrequency)
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{
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struct sdio_func *func = (struct sdio_func *)function->priv;
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struct mmc_host *host = func->card->host;
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struct mmc_ios *ios = &host->ios;
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unsigned int max_hz;
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int err;
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u32 max_khz = maxFrequency/1000;
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if (!max_khz || max_khz > sdio_clock) {
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max_khz = sdio_clock;
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}
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_sdio_claim_host(func);
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max_hz = 1000 * max_khz;
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if (max_hz > host->f_max) {
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max_hz = host->f_max;
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}
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if (max_hz > 25000000) {
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err = csr_sdio_enable_hs(func->card);
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} else {
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err = csr_sdio_disable_hs(func->card);
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}
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if (err) {
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printk(KERN_ERR "SDIO warning: Failed to configure SDIO clock mode\n");
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_sdio_release_host(func);
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return CSR_RESULT_SUCCESS;
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}
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ios->clock = max_hz;
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host->ops->set_ios(host, ios);
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_sdio_release_host(func);
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return CSR_RESULT_SUCCESS;
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} /* CsrSdioMaxBusClockFrequencySet() */
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/*
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* ---------------------------------------------------------------------------
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* CsrSdioInterruptEnable
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* CsrSdioInterruptDisable
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*
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* Enable or disable the SDIO interrupt.
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* The driver disables the SDIO interrupt until the i/o thread can
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* process it.
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* The SDIO interrupt can be disabled by modifying the SDIO_INT_ENABLE
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* register in the Card Common Control Register block, but this requires
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* two CMD52 operations. A better solution is to mask the interrupt at
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* the host controller.
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*
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* Arguments:
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* sdio SDIO context pointer
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*
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* Returns:
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* Zero on success or a UniFi driver error code.
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*
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* ---------------------------------------------------------------------------
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*/
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CsrResult
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CsrSdioInterruptEnable(CsrSdioFunction *function)
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{
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struct sdio_func *func = (struct sdio_func *)function->priv;
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int err = 0;
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#ifdef CSR_CONFIG_MMC_INT_BYPASS_KSOFTIRQD
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sdio_unblock_card_irq(func);
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#else
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_sdio_claim_host(func);
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/* Write the Int Enable in CCCR block */
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#ifdef MMC_QUIRK_LENIENT_FN0
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sdio_f0_writeb(func, 0x3, SDIO_CCCR_IENx, &err);
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#else
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err = csr_io_rw_direct(func->card, 1, 0, SDIO_CCCR_IENx, 0x03, NULL);
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#endif
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_sdio_release_host(func);
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func_exit();
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if (err) {
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printk(KERN_ERR "unifi: %s: error %d writing IENx\n", __FUNCTION__, err);
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return ConvertSdioToCsrSdioResult(err);
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}
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#endif
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return CSR_RESULT_SUCCESS;
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} /* CsrSdioInterruptEnable() */
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CsrResult
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CsrSdioInterruptDisable(CsrSdioFunction *function)
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{
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struct sdio_func *func = (struct sdio_func *)function->priv;
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int err = 0;
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#ifdef CSR_CONFIG_MMC_INT_BYPASS_KSOFTIRQD
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sdio_block_card_irq(func);
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#else
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_sdio_claim_host(func);
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/* Write the Int Enable in CCCR block */
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#ifdef MMC_QUIRK_LENIENT_FN0
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sdio_f0_writeb(func, 0, SDIO_CCCR_IENx, &err);
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#else
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err = csr_io_rw_direct(func->card, 1, 0, SDIO_CCCR_IENx, 0x00, NULL);
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#endif
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_sdio_release_host(func);
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|
|
func_exit();
|
|
if (err) {
|
|
printk(KERN_ERR "unifi: %s: error %d writing IENx\n", __FUNCTION__, err);
|
|
return ConvertSdioToCsrSdioResult(err);
|
|
}
|
|
#endif
|
|
return CSR_RESULT_SUCCESS;
|
|
} /* CsrSdioInterruptDisable() */
|
|
|
|
|
|
void CsrSdioInterruptAcknowledge(CsrSdioFunction *function)
|
|
{
|
|
}
|
|
|
|
|
|
/*
|
|
* ---------------------------------------------------------------------------
|
|
* CsrSdioFunctionEnable
|
|
*
|
|
* Enable i/o on function 1.
|
|
*
|
|
* Arguments:
|
|
* sdio SDIO context pointer
|
|
*
|
|
* Returns:
|
|
* UniFi driver error code.
|
|
* ---------------------------------------------------------------------------
|
|
*/
|
|
CsrResult
|
|
CsrSdioFunctionEnable(CsrSdioFunction *function)
|
|
{
|
|
struct sdio_func *func = (struct sdio_func *)function->priv;
|
|
int err;
|
|
|
|
func_enter();
|
|
|
|
/* Enable UniFi function 1 (the 802.11 part). */
|
|
_sdio_claim_host(func);
|
|
err = sdio_enable_func(func);
|
|
_sdio_release_host(func);
|
|
if (err) {
|
|
unifi_error(NULL, "Failed to enable SDIO function %d\n", func->num);
|
|
}
|
|
|
|
func_exit();
|
|
return ConvertSdioToCsrSdioResult(err);
|
|
} /* CsrSdioFunctionEnable() */
|
|
|
|
|
|
/*
|
|
* ---------------------------------------------------------------------------
|
|
* CsrSdioFunctionDisable
|
|
*
|
|
* Enable i/o on function 1.
|
|
*
|
|
* Arguments:
|
|
* sdio SDIO context pointer
|
|
*
|
|
* Returns:
|
|
* UniFi driver error code.
|
|
* ---------------------------------------------------------------------------
|
|
*/
|
|
CsrResult
|
|
CsrSdioFunctionDisable(CsrSdioFunction *function)
|
|
{
|
|
struct sdio_func *func = (struct sdio_func *)function->priv;
|
|
int err;
|
|
|
|
func_enter();
|
|
|
|
/* Disable UniFi function 1 (the 802.11 part). */
|
|
_sdio_claim_host(func);
|
|
err = sdio_disable_func(func);
|
|
_sdio_release_host(func);
|
|
if (err) {
|
|
unifi_error(NULL, "Failed to disable SDIO function %d\n", func->num);
|
|
}
|
|
|
|
func_exit();
|
|
return ConvertSdioToCsrSdioResult(err);
|
|
} /* CsrSdioFunctionDisable() */
|
|
|
|
|
|
/*
|
|
* ---------------------------------------------------------------------------
|
|
* CsrSdioFunctionActive
|
|
*
|
|
* No-op as the bus goes to an active state at the start of every
|
|
* command.
|
|
*
|
|
* Arguments:
|
|
* sdio SDIO context pointer
|
|
* ---------------------------------------------------------------------------
|
|
*/
|
|
void
|
|
CsrSdioFunctionActive(CsrSdioFunction *function)
|
|
{
|
|
} /* CsrSdioFunctionActive() */
|
|
|
|
/*
|
|
* ---------------------------------------------------------------------------
|
|
* CsrSdioFunctionIdle
|
|
*
|
|
* Set the function as idle.
|
|
*
|
|
* Arguments:
|
|
* sdio SDIO context pointer
|
|
* ---------------------------------------------------------------------------
|
|
*/
|
|
void
|
|
CsrSdioFunctionIdle(CsrSdioFunction *function)
|
|
{
|
|
} /* CsrSdioFunctionIdle() */
|
|
|
|
|
|
/*
|
|
* ---------------------------------------------------------------------------
|
|
* CsrSdioPowerOn
|
|
*
|
|
* Power on UniFi.
|
|
*
|
|
* Arguments:
|
|
* sdio SDIO context pointer
|
|
* ---------------------------------------------------------------------------
|
|
*/
|
|
CsrResult
|
|
CsrSdioPowerOn(CsrSdioFunction *function)
|
|
{
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32)
|
|
struct sdio_func *func = (struct sdio_func *)function->priv;
|
|
struct mmc_host *host = func->card->host;
|
|
|
|
_sdio_claim_host(func);
|
|
if (!card_is_powered) {
|
|
mmc_power_restore_host(host);
|
|
card_is_powered = 1;
|
|
} else {
|
|
printk(KERN_INFO "SDIO: Skip power on; card is already powered.\n");
|
|
}
|
|
_sdio_release_host(func);
|
|
#endif /* 2.6.32 */
|
|
|
|
return CSR_RESULT_SUCCESS;
|
|
} /* CsrSdioPowerOn() */
|
|
|
|
/*
|
|
* ---------------------------------------------------------------------------
|
|
* CsrSdioPowerOff
|
|
*
|
|
* Power off UniFi.
|
|
*
|
|
* Arguments:
|
|
* sdio SDIO context pointer
|
|
* ---------------------------------------------------------------------------
|
|
*/
|
|
void
|
|
CsrSdioPowerOff(CsrSdioFunction *function)
|
|
{
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32)
|
|
struct sdio_func *func = (struct sdio_func *)function->priv;
|
|
struct mmc_host *host = func->card->host;
|
|
|
|
_sdio_claim_host(func);
|
|
if (card_is_powered) {
|
|
mmc_power_save_host(host);
|
|
card_is_powered = 0;
|
|
} else {
|
|
printk(KERN_INFO "SDIO: Skip power off; card is already powered off.\n");
|
|
}
|
|
_sdio_release_host(func);
|
|
#endif /* 2.6.32 */
|
|
} /* CsrSdioPowerOff() */
|
|
|
|
|
|
static int
|
|
sdio_set_block_size_ignore_first_error(struct sdio_func *func, unsigned blksz)
|
|
{
|
|
int ret;
|
|
|
|
if (blksz > func->card->host->max_blk_size)
|
|
return -EINVAL;
|
|
|
|
if (blksz == 0) {
|
|
blksz = min(func->max_blksize, func->card->host->max_blk_size);
|
|
blksz = min(blksz, 512u);
|
|
}
|
|
|
|
/*
|
|
* Ignore -ERANGE (OUT_OF_RANGE in R5) on the first byte as
|
|
* the block size may be invalid until both bytes are written.
|
|
*/
|
|
ret = csr_io_rw_direct(func->card, 1, 0,
|
|
SDIO_FBR_BASE(func->num) + SDIO_FBR_BLKSIZE,
|
|
blksz & 0xff, NULL);
|
|
if (ret && ret != -ERANGE)
|
|
return ret;
|
|
ret = csr_io_rw_direct(func->card, 1, 0,
|
|
SDIO_FBR_BASE(func->num) + SDIO_FBR_BLKSIZE + 1,
|
|
(blksz >> 8) & 0xff, NULL);
|
|
if (ret)
|
|
return ret;
|
|
func->cur_blksize = blksz;
|
|
|
|
return 0;
|
|
}
|
|
|
|
CsrResult
|
|
CsrSdioBlockSizeSet(CsrSdioFunction *function, u16 blockSize)
|
|
{
|
|
struct sdio_func *func = (struct sdio_func *)function->priv;
|
|
int r = 0;
|
|
|
|
/* Module parameter overrides */
|
|
if (sdio_block_size > -1) {
|
|
blockSize = sdio_block_size;
|
|
}
|
|
|
|
unifi_trace(NULL, UDBG1, "Set SDIO function block size to %d\n",
|
|
blockSize);
|
|
|
|
_sdio_claim_host(func);
|
|
r = sdio_set_block_size(func, blockSize);
|
|
_sdio_release_host(func);
|
|
|
|
/*
|
|
* The MMC driver for kernels prior to 2.6.32 may fail this request
|
|
* with -ERANGE. In this case use our workaround.
|
|
*/
|
|
if (r == -ERANGE) {
|
|
_sdio_claim_host(func);
|
|
r = sdio_set_block_size_ignore_first_error(func, blockSize);
|
|
_sdio_release_host(func);
|
|
}
|
|
if (r) {
|
|
unifi_error(NULL, "Error %d setting block size\n", r);
|
|
}
|
|
|
|
/* Determine the achieved block size to pass to the core */
|
|
function->blockSize = func->cur_blksize;
|
|
|
|
return ConvertSdioToCsrSdioResult(r);
|
|
} /* CsrSdioBlockSizeSet() */
|
|
|
|
|
|
/*
|
|
* ---------------------------------------------------------------------------
|
|
* CsrSdioHardReset
|
|
*
|
|
* Hard Resets UniFi is possible.
|
|
*
|
|
* Arguments:
|
|
* sdio SDIO context pointer
|
|
* ---------------------------------------------------------------------------
|
|
*/
|
|
CsrResult
|
|
CsrSdioHardReset(CsrSdioFunction *function)
|
|
{
|
|
return CSR_RESULT_FAILURE;
|
|
} /* CsrSdioHardReset() */
|
|
|
|
|
|
|
|
/*
|
|
* ---------------------------------------------------------------------------
|
|
* uf_glue_sdio_int_handler
|
|
*
|
|
* Interrupt callback function for SDIO interrupts.
|
|
* This is called in kernel context (i.e. not interrupt context).
|
|
*
|
|
* Arguments:
|
|
* func SDIO context pointer
|
|
*
|
|
* Returns:
|
|
* None.
|
|
*
|
|
* Note: Called with host already claimed.
|
|
* ---------------------------------------------------------------------------
|
|
*/
|
|
static void
|
|
uf_glue_sdio_int_handler(struct sdio_func *func)
|
|
{
|
|
CsrSdioFunction *sdio_ctx;
|
|
CsrSdioInterruptDsrCallback func_dsr_callback;
|
|
int r;
|
|
|
|
sdio_ctx = sdio_get_drvdata(func);
|
|
if (!sdio_ctx) {
|
|
return;
|
|
}
|
|
|
|
#ifndef CSR_CONFIG_MMC_INT_BYPASS_KSOFTIRQD
|
|
/*
|
|
* Normally, we are not allowed to do any SDIO commands here.
|
|
* However, this is called in a thread context and with the SDIO lock
|
|
* so we disable the interrupts here instead of trying to do complicated
|
|
* things with the SDIO lock.
|
|
*/
|
|
#ifdef MMC_QUIRK_LENIENT_FN0
|
|
sdio_f0_writeb(func, 0, SDIO_CCCR_IENx, &r);
|
|
#else
|
|
r = csr_io_rw_direct(func->card, 1, 0, SDIO_CCCR_IENx, 0x00, NULL);
|
|
#endif
|
|
if (r) {
|
|
printk(KERN_ERR "UniFi MMC Int handler: Failed to disable interrupts %d\n", r);
|
|
}
|
|
#endif
|
|
|
|
/* If the function driver has registered a handler, call it */
|
|
if (sdio_func_drv && sdio_func_drv->intr) {
|
|
|
|
func_dsr_callback = sdio_func_drv->intr(sdio_ctx);
|
|
|
|
/* If interrupt handle returns a DSR handle, call it */
|
|
if (func_dsr_callback) {
|
|
func_dsr_callback(sdio_ctx);
|
|
}
|
|
}
|
|
|
|
} /* uf_glue_sdio_int_handler() */
|
|
|
|
|
|
|
|
/*
|
|
* ---------------------------------------------------------------------------
|
|
* csr_sdio_linux_remove_irq
|
|
*
|
|
* Unregister the interrupt handler.
|
|
* This means that the linux layer can not process interrupts any more.
|
|
*
|
|
* Arguments:
|
|
* sdio SDIO context pointer
|
|
*
|
|
* Returns:
|
|
* Status of the removal.
|
|
* ---------------------------------------------------------------------------
|
|
*/
|
|
int
|
|
csr_sdio_linux_remove_irq(CsrSdioFunction *function)
|
|
{
|
|
struct sdio_func *func = (struct sdio_func *)function->priv;
|
|
int r;
|
|
|
|
unifi_trace(NULL, UDBG1, "csr_sdio_linux_remove_irq\n");
|
|
|
|
sdio_claim_host(func);
|
|
r = sdio_release_irq(func);
|
|
sdio_release_host(func);
|
|
|
|
return r;
|
|
|
|
} /* csr_sdio_linux_remove_irq() */
|
|
|
|
|
|
/*
|
|
* ---------------------------------------------------------------------------
|
|
* csr_sdio_linux_install_irq
|
|
*
|
|
* Register the interrupt handler.
|
|
* This means that the linux layer can process interrupts.
|
|
*
|
|
* Arguments:
|
|
* sdio SDIO context pointer
|
|
*
|
|
* Returns:
|
|
* Status of the removal.
|
|
* ---------------------------------------------------------------------------
|
|
*/
|
|
int
|
|
csr_sdio_linux_install_irq(CsrSdioFunction *function)
|
|
{
|
|
struct sdio_func *func = (struct sdio_func *)function->priv;
|
|
int r;
|
|
|
|
unifi_trace(NULL, UDBG1, "csr_sdio_linux_install_irq\n");
|
|
|
|
/* Register our interrupt handle */
|
|
sdio_claim_host(func);
|
|
r = sdio_claim_irq(func, uf_glue_sdio_int_handler);
|
|
sdio_release_host(func);
|
|
|
|
/* If the interrupt was installed earlier, is fine */
|
|
if (r == -EBUSY) {
|
|
r = 0;
|
|
}
|
|
|
|
return r;
|
|
} /* csr_sdio_linux_install_irq() */
|
|
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32)
|
|
#ifdef CONFIG_PM
|
|
|
|
/*
|
|
* Power Management notifier
|
|
*/
|
|
struct uf_sdio_mmc_pm_notifier
|
|
{
|
|
struct list_head list;
|
|
|
|
CsrSdioFunction *sdio_ctx;
|
|
struct notifier_block pm_notifier;
|
|
};
|
|
|
|
/* PM notifier list head */
|
|
static struct uf_sdio_mmc_pm_notifier uf_sdio_mmc_pm_notifiers = {
|
|
.sdio_ctx = NULL,
|
|
};
|
|
|
|
/*
|
|
* ---------------------------------------------------------------------------
|
|
* uf_sdio_mmc_register_pm_notifier
|
|
* uf_sdio_mmc_unregister_pm_notifier
|
|
*
|
|
* Register/unregister for power management events. A list is used to
|
|
* allow multiple card instances to be supported.
|
|
*
|
|
* Arguments:
|
|
* sdio_ctx - CSR SDIO context to associate PM notifier to
|
|
*
|
|
* Returns:
|
|
* Register function returns NULL on error
|
|
* ---------------------------------------------------------------------------
|
|
*/
|
|
static struct uf_sdio_mmc_pm_notifier *
|
|
uf_sdio_mmc_register_pm_notifier(CsrSdioFunction *sdio_ctx)
|
|
{
|
|
/* Allocate notifier context for this card instance */
|
|
struct uf_sdio_mmc_pm_notifier *notifier_ctx = kmalloc(sizeof(struct uf_sdio_mmc_pm_notifier), GFP_KERNEL);
|
|
|
|
if (notifier_ctx)
|
|
{
|
|
notifier_ctx->sdio_ctx = sdio_ctx;
|
|
notifier_ctx->pm_notifier.notifier_call = uf_sdio_mmc_power_event;
|
|
|
|
list_add(¬ifier_ctx->list, &uf_sdio_mmc_pm_notifiers.list);
|
|
|
|
if (register_pm_notifier(¬ifier_ctx->pm_notifier)) {
|
|
printk(KERN_ERR "unifi: register_pm_notifier failed\n");
|
|
}
|
|
}
|
|
|
|
return notifier_ctx;
|
|
}
|
|
|
|
static void
|
|
uf_sdio_mmc_unregister_pm_notifier(CsrSdioFunction *sdio_ctx)
|
|
{
|
|
struct uf_sdio_mmc_pm_notifier *notifier_ctx;
|
|
struct list_head *node, *q;
|
|
|
|
list_for_each_safe(node, q, &uf_sdio_mmc_pm_notifiers.list) {
|
|
notifier_ctx = list_entry(node, struct uf_sdio_mmc_pm_notifier, list);
|
|
|
|
/* If it matches, unregister and free the notifier context */
|
|
if (notifier_ctx && notifier_ctx->sdio_ctx == sdio_ctx)
|
|
{
|
|
if (unregister_pm_notifier(¬ifier_ctx->pm_notifier)) {
|
|
printk(KERN_ERR "unifi: unregister_pm_notifier failed\n");
|
|
}
|
|
|
|
/* Remove from list */
|
|
notifier_ctx->sdio_ctx = NULL;
|
|
list_del(node);
|
|
kfree(notifier_ctx);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* ---------------------------------------------------------------------------
|
|
* uf_sdio_mmc_power_event
|
|
*
|
|
* Handler for power management events.
|
|
*
|
|
* We need to handle suspend/resume events while the userspace is unsuspended
|
|
* to allow the SME to run its suspend/resume state machines.
|
|
*
|
|
* Arguments:
|
|
* event event ID
|
|
*
|
|
* Returns:
|
|
* Status of the event handling
|
|
* ---------------------------------------------------------------------------
|
|
*/
|
|
static int
|
|
uf_sdio_mmc_power_event(struct notifier_block *this, unsigned long event, void *ptr)
|
|
{
|
|
struct uf_sdio_mmc_pm_notifier *notifier_ctx = container_of(this,
|
|
struct uf_sdio_mmc_pm_notifier,
|
|
pm_notifier);
|
|
|
|
/* Call the CSR SDIO function driver's suspend/resume method
|
|
* while the userspace is unsuspended.
|
|
*/
|
|
switch (event) {
|
|
case PM_POST_HIBERNATION:
|
|
case PM_POST_SUSPEND:
|
|
printk(KERN_INFO "%s:%d resume\n", __FUNCTION__, __LINE__ );
|
|
if (sdio_func_drv && sdio_func_drv->resume) {
|
|
sdio_func_drv->resume(notifier_ctx->sdio_ctx);
|
|
}
|
|
break;
|
|
|
|
case PM_HIBERNATION_PREPARE:
|
|
case PM_SUSPEND_PREPARE:
|
|
printk(KERN_INFO "%s:%d suspend\n", __FUNCTION__, __LINE__ );
|
|
if (sdio_func_drv && sdio_func_drv->suspend) {
|
|
sdio_func_drv->suspend(notifier_ctx->sdio_ctx);
|
|
}
|
|
break;
|
|
}
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
#endif /* CONFIG_PM */
|
|
#endif /* 2.6.32 */
|
|
|
|
/*
|
|
* ---------------------------------------------------------------------------
|
|
* uf_glue_sdio_probe
|
|
*
|
|
* Card insert callback.
|
|
*
|
|
* Arguments:
|
|
* func Our (glue layer) context pointer.
|
|
*
|
|
* Returns:
|
|
* UniFi driver error code.
|
|
* ---------------------------------------------------------------------------
|
|
*/
|
|
static int
|
|
uf_glue_sdio_probe(struct sdio_func *func,
|
|
const struct sdio_device_id *id)
|
|
{
|
|
int instance;
|
|
CsrSdioFunction *sdio_ctx;
|
|
|
|
func_enter();
|
|
|
|
/* First of all claim the SDIO driver */
|
|
sdio_claim_host(func);
|
|
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32)
|
|
/* Assume that the card is already powered */
|
|
card_is_powered = 1;
|
|
#endif
|
|
|
|
/* Assumes one card per host, which is true for SDIO */
|
|
instance = func->card->host->index;
|
|
printk("sdio bus_id: %16s - UniFi card 0x%X inserted\n",
|
|
sdio_func_id(func), instance);
|
|
|
|
/* Allocate context */
|
|
sdio_ctx = (CsrSdioFunction *)kmalloc(sizeof(CsrSdioFunction),
|
|
GFP_KERNEL);
|
|
if (sdio_ctx == NULL) {
|
|
sdio_release_host(func);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* Initialise the context */
|
|
sdio_ctx->sdioId.manfId = func->vendor;
|
|
sdio_ctx->sdioId.cardId = func->device;
|
|
sdio_ctx->sdioId.sdioFunction = func->num;
|
|
sdio_ctx->sdioId.sdioInterface = func->class;
|
|
sdio_ctx->blockSize = func->cur_blksize;
|
|
sdio_ctx->priv = (void *)func;
|
|
sdio_ctx->features = 0;
|
|
|
|
/* Module parameter enables byte mode */
|
|
if (sdio_byte_mode) {
|
|
sdio_ctx->features |= CSR_SDIO_FEATURE_BYTE_MODE;
|
|
}
|
|
|
|
if (func->card->host->caps & MMC_CAP_SD_HIGHSPEED) {
|
|
unifi_trace(NULL, UDBG1, "MMC_CAP_SD_HIGHSPEED is available\n");
|
|
}
|
|
|
|
#ifdef MMC_QUIRK_LENIENT_FN0
|
|
func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
|
|
#endif
|
|
|
|
/* Pass context to the SDIO driver */
|
|
sdio_set_drvdata(func, sdio_ctx);
|
|
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32)
|
|
#ifdef CONFIG_PM
|
|
/* Register to get PM events */
|
|
if (uf_sdio_mmc_register_pm_notifier(sdio_ctx) == NULL) {
|
|
unifi_error(NULL, "%s: Failed to register for PM events\n", __FUNCTION__);
|
|
}
|
|
#endif
|
|
#endif
|
|
|
|
/* Register this device with the SDIO function driver */
|
|
/* Call the main UniFi driver inserted handler */
|
|
if (sdio_func_drv && sdio_func_drv->inserted) {
|
|
uf_add_os_device(instance, &func->dev);
|
|
sdio_func_drv->inserted(sdio_ctx);
|
|
}
|
|
|
|
/* We have finished, so release the SDIO driver */
|
|
sdio_release_host(func);
|
|
|
|
#ifdef ANDROID_BUILD
|
|
/* Take the wakelock */
|
|
unifi_trace(NULL, UDBG1, "probe: take wake lock\n");
|
|
wake_lock(&unifi_sdio_wake_lock);
|
|
#endif
|
|
|
|
func_exit();
|
|
return 0;
|
|
} /* uf_glue_sdio_probe() */
|
|
|
|
|
|
/*
|
|
* ---------------------------------------------------------------------------
|
|
* uf_glue_sdio_remove
|
|
*
|
|
* Card removal callback.
|
|
*
|
|
* Arguments:
|
|
* func Our (glue layer) context pointer.
|
|
*
|
|
* Returns:
|
|
* UniFi driver error code.
|
|
* ---------------------------------------------------------------------------
|
|
*/
|
|
static void
|
|
uf_glue_sdio_remove(struct sdio_func *func)
|
|
{
|
|
CsrSdioFunction *sdio_ctx;
|
|
|
|
sdio_ctx = sdio_get_drvdata(func);
|
|
if (!sdio_ctx) {
|
|
return;
|
|
}
|
|
|
|
func_enter();
|
|
|
|
unifi_info(NULL, "UniFi card removed\n");
|
|
|
|
/* Clean up the SDIO function driver */
|
|
if (sdio_func_drv && sdio_func_drv->removed) {
|
|
uf_remove_os_device(func->card->host->index);
|
|
sdio_func_drv->removed(sdio_ctx);
|
|
}
|
|
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32)
|
|
#ifdef CONFIG_PM
|
|
/* Unregister for PM events */
|
|
uf_sdio_mmc_unregister_pm_notifier(sdio_ctx);
|
|
#endif
|
|
#endif
|
|
|
|
kfree(sdio_ctx);
|
|
|
|
func_exit();
|
|
|
|
} /* uf_glue_sdio_remove */
|
|
|
|
|
|
/*
|
|
* SDIO ids *must* be statically declared, so we can't take
|
|
* them from the list passed in csr_sdio_register_driver().
|
|
*/
|
|
static const struct sdio_device_id unifi_ids[] = {
|
|
{ SDIO_DEVICE(SDIO_MANF_ID_CSR,SDIO_CARD_ID_UNIFI_3) },
|
|
{ SDIO_DEVICE(SDIO_MANF_ID_CSR,SDIO_CARD_ID_UNIFI_4) },
|
|
{ /* end: all zeroes */ },
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(sdio, unifi_ids);
|
|
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32)
|
|
#ifdef CONFIG_PM
|
|
|
|
/*
|
|
* ---------------------------------------------------------------------------
|
|
* uf_glue_sdio_suspend
|
|
*
|
|
* Card suspend callback. The userspace will already be suspended.
|
|
*
|
|
* Arguments:
|
|
* dev The struct device owned by the MMC driver
|
|
*
|
|
* Returns:
|
|
* None
|
|
* ---------------------------------------------------------------------------
|
|
*/
|
|
static int
|
|
uf_glue_sdio_suspend(struct device *dev)
|
|
{
|
|
func_enter();
|
|
|
|
unifi_trace(NULL, UDBG1, "uf_glue_sdio_suspend");
|
|
|
|
func_exit();
|
|
return 0;
|
|
} /* uf_glue_sdio_suspend */
|
|
|
|
|
|
/*
|
|
* ---------------------------------------------------------------------------
|
|
* uf_glue_sdio_resume
|
|
*
|
|
* Card resume callback. The userspace will still be suspended.
|
|
*
|
|
* Arguments:
|
|
* dev The struct device owned by the MMC driver
|
|
*
|
|
* Returns:
|
|
* None
|
|
* ---------------------------------------------------------------------------
|
|
*/
|
|
static int
|
|
uf_glue_sdio_resume(struct device *dev)
|
|
{
|
|
func_enter();
|
|
|
|
unifi_trace(NULL, UDBG1, "uf_glue_sdio_resume");
|
|
|
|
#ifdef ANDROID_BUILD
|
|
unifi_trace(NULL, UDBG1, "resume: take wakelock\n");
|
|
wake_lock(&unifi_sdio_wake_lock);
|
|
#endif
|
|
|
|
func_exit();
|
|
return 0;
|
|
|
|
} /* uf_glue_sdio_resume */
|
|
|
|
static struct dev_pm_ops unifi_pm_ops = {
|
|
.suspend = uf_glue_sdio_suspend,
|
|
.resume = uf_glue_sdio_resume,
|
|
};
|
|
|
|
#define UNIFI_PM_OPS (&unifi_pm_ops)
|
|
|
|
#else
|
|
|
|
#define UNIFI_PM_OPS NULL
|
|
|
|
#endif /* CONFIG_PM */
|
|
#endif /* 2.6.32 */
|
|
|
|
static struct sdio_driver unifi_driver = {
|
|
.probe = uf_glue_sdio_probe,
|
|
.remove = uf_glue_sdio_remove,
|
|
.name = "unifi",
|
|
.id_table = unifi_ids,
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32)
|
|
.drv.pm = UNIFI_PM_OPS,
|
|
#endif /* 2.6.32 */
|
|
};
|
|
|
|
|
|
/*
|
|
* ---------------------------------------------------------------------------
|
|
* CsrSdioFunctionDriverRegister
|
|
* CsrSdioFunctionDriverUnregister
|
|
*
|
|
* These functions are called from the main module load and unload
|
|
* functions. They perform the appropriate operations for the
|
|
* linux MMC/SDIO driver.
|
|
*
|
|
* Arguments:
|
|
* sdio_drv Pointer to the function driver's SDIO structure.
|
|
*
|
|
* Returns:
|
|
* None.
|
|
* ---------------------------------------------------------------------------
|
|
*/
|
|
CsrResult
|
|
CsrSdioFunctionDriverRegister(CsrSdioFunctionDriver *sdio_drv)
|
|
{
|
|
int r;
|
|
|
|
printk("UniFi: Using native Linux MMC driver for SDIO.\n");
|
|
|
|
if (sdio_func_drv) {
|
|
unifi_error(NULL, "sdio_mmc: UniFi driver already registered\n");
|
|
return CSR_SDIO_RESULT_INVALID_VALUE;
|
|
}
|
|
|
|
#ifdef ANDROID_BUILD
|
|
wake_lock_init(&unifi_sdio_wake_lock, WAKE_LOCK_SUSPEND, "unifi_sdio_work");
|
|
#endif
|
|
|
|
/* Save the registered driver description */
|
|
/*
|
|
* FIXME:
|
|
* Need a table here to handle a call to register for just one function.
|
|
* mmc only allows us to register for the whole device
|
|
*/
|
|
sdio_func_drv = sdio_drv;
|
|
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32)
|
|
#ifdef CONFIG_PM
|
|
/* Initialise PM notifier list */
|
|
INIT_LIST_HEAD(&uf_sdio_mmc_pm_notifiers.list);
|
|
#endif
|
|
#endif
|
|
|
|
/* Register ourself with mmc_core */
|
|
r = sdio_register_driver(&unifi_driver);
|
|
if (r) {
|
|
printk(KERN_ERR "unifi_sdio: Failed to register UniFi SDIO driver: %d\n", r);
|
|
return ConvertSdioToCsrSdioResult(r);
|
|
}
|
|
|
|
return CSR_RESULT_SUCCESS;
|
|
} /* CsrSdioFunctionDriverRegister() */
|
|
|
|
|
|
|
|
void
|
|
CsrSdioFunctionDriverUnregister(CsrSdioFunctionDriver *sdio_drv)
|
|
{
|
|
printk(KERN_INFO "UniFi: unregister from MMC sdio\n");
|
|
|
|
#ifdef ANDROID_BUILD
|
|
wake_lock_destroy(&unifi_sdio_wake_lock);
|
|
#endif
|
|
sdio_unregister_driver(&unifi_driver);
|
|
|
|
sdio_func_drv = NULL;
|
|
|
|
} /* CsrSdioFunctionDriverUnregister() */
|
|
|