/* Realtek PCI-Express SD/MMC Card Interface driver
*
* Copyright(c) 2009 Realtek Semiconductor Corp. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, see <http://www.gnu.org/licenses/>.
*
* Author:
* Wei WANG <wei_wang@realsil.com.cn>
* No. 450, Shenhu Road, Suzhou Industry Park, Suzhou, China
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/highmem.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/mmc/host.h>
#include <linux/mmc/mmc.h>
#include <linux/mmc/sd.h>
#include <linux/mmc/card.h>
#include <linux/mfd/rtsx_pci.h>
#include <asm/unaligned.h>
/* SD Tuning Data Structure
* Record continuous timing phase path
*/
struct timing_phase_path {
int start;
int end;
int mid;
int len;
};
struct realtek_pci_sdmmc {
struct platform_device *pdev;
struct rtsx_pcr *pcr;
struct mmc_host *mmc;
struct mmc_request *mrq;
struct mutex host_mutex;
u8 ssc_depth;
unsigned int clock;
bool vpclk;
bool double_clk;
bool eject;
bool initial_mode;
bool ddr_mode;
};
static inline struct device *sdmmc_dev(struct realtek_pci_sdmmc *host)
{
return &(host->pdev->dev);
}
static inline void sd_clear_error(struct realtek_pci_sdmmc *host)
{
rtsx_pci_write_register(host->pcr, CARD_STOP,
SD_STOP | SD_CLR_ERR, SD_STOP | SD_CLR_ERR);
}
#ifdef DEBUG
static void sd_print_debug_regs(struct realtek_pci_sdmmc *host)
{
struct rtsx_pcr *pcr = host->pcr;
u16 i;
u8 *ptr;
/* Print SD host internal registers */
rtsx_pci_init_cmd(pcr);
for (i = 0xFDA0; i <= 0xFDAE; i++)
rtsx_pci_add_cmd(pcr, READ_REG_CMD, i, 0, 0);
for (i = 0xFD52; i <= 0xFD69; i++)
rtsx_pci_add_cmd(pcr, READ_REG_CMD, i, 0, 0);
rtsx_pci_send_cmd(pcr