+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/* Realtek PCI-Express Memstick Card Interface driver
- *
- * Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved.
- *
- * Author:
- * Wei WANG <wei_wang@realsil.com.cn>
- */
-
-#include <linux/module.h>
-#include <linux/highmem.h>
-#include <linux/delay.h>
-#include <linux/platform_device.h>
-#include <linux/memstick.h>
-#include <linux/rtsx_pci.h>
-#include <asm/unaligned.h>
-
-struct realtek_pci_ms {
- struct platform_device *pdev;
- struct rtsx_pcr *pcr;
- struct memstick_host *msh;
- struct memstick_request *req;
-
- struct mutex host_mutex;
- struct work_struct handle_req;
-
- u8 ssc_depth;
- unsigned int clock;
- unsigned char ifmode;
- bool eject;
-};
-
-static inline struct device *ms_dev(struct realtek_pci_ms *host)
-{
- return &(host->pdev->dev);
-}
-
-static inline void ms_clear_error(struct realtek_pci_ms *host)
-{
- rtsx_pci_write_register(host->pcr, CARD_STOP,
- MS_STOP | MS_CLR_ERR, MS_STOP | MS_CLR_ERR);
-}
-
-#ifdef DEBUG
-
-static void ms_print_debug_regs(struct realtek_pci_ms *host)
-{
- struct rtsx_pcr *pcr = host->pcr;
- u16 i;
- u8 *ptr;
-
- /* Print MS host internal registers */
- rtsx_pci_init_cmd(pcr);
- for (i = 0xFD40; i <= 0xFD44; 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, 100);
-
- ptr = rtsx_pci_get_cmd_data(pcr);
- for (i = 0xFD40; i <= 0xFD44; i++)
- dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", i, *(ptr++));
- for (i = 0xFD52; i <= 0xFD69; i++)
- dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", i, *(ptr++));
-}
-
-#else
-
-#define ms_print_debug_regs(host)
-
-#endif
-
-static int ms_power_on(struct realtek_pci_ms *host)
-{
- struct rtsx_pcr *pcr = host->pcr;
- int err;
-
- rtsx_pci_init_cmd(pcr);
- rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_SELECT, 0x07, MS_MOD_SEL);
- rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_SHARE_MODE,
- CARD_SHARE_MASK, CARD_SHARE_48_MS);
- rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_EN,
- MS_CLK_EN, MS_CLK_EN);
- err = rtsx_pci_send_cmd(pcr, 100);
- if (err < 0)
- return err;
-
- err = rtsx_pci_card_pull_ctl_enable(pcr, RTSX_MS_CARD);
- if (err < 0)
- return err;
-
- err = rtsx_pci_card_power_on(pcr, RTSX_MS_CARD);
- if (err < 0)
- return err;
-
- /* Wait ms power stable */
- msleep(150);
-
- err = rtsx_pci_write_register(pcr, CARD_OE,
- MS_OUTPUT_EN, MS_OUTPUT_EN);
- if (err < 0)
- return err;
-
- return 0;
-}
-
-static int ms_power_off(struct realtek_pci_ms *host)
-{
- struct rtsx_pcr *pcr = host->pcr;
- int err;
-
- rtsx_pci_init_cmd(pcr);
-
- rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_EN, MS_CLK_EN, 0);
- rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_OE, MS_OUTPUT_EN, 0);
-
- err = rtsx_pci_send_cmd(pcr, 100);
- if (err < 0)
- return err;
-
- err = rtsx_pci_card_power_off(pcr, RTSX_MS_CARD);
- if (err < 0)
- return err;
-
- return rtsx_pci_card_pull_ctl_disable(pcr, RTSX_MS_CARD);
-}
-
-static int ms_transfer_data(struct realtek_pci_ms *host, unsigned char data_dir,
- u8 tpc, u8 cfg, struct scatterlist *sg)
-{
- struct rtsx_pcr *pcr = host->pcr;
- int err;
- unsigned int length = sg->length;
- u16 sec_cnt = (u16)(length / 512);
- u8 val, trans_mode, dma_dir;
- struct memstick_dev *card = host->msh->card;
- bool pro_card = card->id.type == MEMSTICK_TYPE_PRO;
-
- dev_dbg(ms_dev(host), "%s: tpc = 0x%02x, data_dir = %s, length = %d\n",
- __func__, tpc, (data_dir == READ) ? "READ" : "WRITE",
- length);
-
- if (data_dir == READ) {
- dma_dir = DMA_DIR_FROM_CARD;
- trans_mode = pro_card ? MS_TM_AUTO_READ : MS_TM_NORMAL_READ;
- } else {
- dma_dir = DMA_DIR_TO_CARD;
- trans_mode = pro_card ? MS_TM_AUTO_WRITE : MS_TM_NORMAL_WRITE;
- }
-
- rtsx_pci_init_cmd(pcr);
-
- rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_TPC, 0xFF, tpc);
- if (pro_card) {
- rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_SECTOR_CNT_H,
- 0xFF, (u8)(sec_cnt >> 8));
- rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_SECTOR_CNT_L,
- 0xFF, (u8)sec_cnt);
- }
- rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_TRANS_CFG, 0xFF, cfg);
-
- rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, IRQSTAT0,
- DMA_DONE_INT, DMA_DONE_INT);
- rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC3, 0xFF, (u8)(length >> 24));
- rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC2, 0xFF, (u8)(length >> 16));
- rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC1, 0xFF, (u8)(length >> 8));
- rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC0, 0xFF, (u8)length);
- rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMACTL,
- 0x03 | DMA_PACK_SIZE_MASK, dma_dir | DMA_EN | DMA_512);
- rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_DATA_SOURCE,
- 0x01, RING_BUFFER);
-
- rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_TRANSFER,
- 0xFF, MS_TRANSFER_START | trans_mode);
- rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, MS_TRANSFER,
- MS_TRANSFER_END, MS_TRANSFER_END);
-
- rtsx_pci_send_cmd_no_wait(pcr);
-
- err = rtsx_pci_transfer_data(pcr, sg, 1, data_dir == READ, 10000);
- if (err < 0) {
- ms_clear_error(host);
- return err;
- }
-
- rtsx_pci_read_register(pcr, MS_TRANS_CFG, &val);
- if (pro_card) {
- if (val & (MS_INT_CMDNK | MS_INT_ERR |
- MS_CRC16_ERR | MS_RDY_TIMEOUT))
- return -EIO;
- } else {
- if (val & (MS_CRC16_ERR | MS_RDY_TIMEOUT))
- return -EIO;
- }
-
- return 0;
-}
-
-static int ms_write_bytes(struct realtek_pci_ms *host, u8 tpc,
- u8 cfg, u8 cnt, u8 *data, u8 *int_reg)
-{
- struct rtsx_pcr *pcr = host->pcr;
- int err, i;
-
- dev_dbg(ms_dev(host), "%s: tpc = 0x%02x\n", __func__, tpc);
-
- if (!data)
- return -EINVAL;
-
- rtsx_pci_init_cmd(pcr);
-
- for (i = 0; i < cnt; i++)
- rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
- PPBUF_BASE2 + i, 0xFF, data[i]);
- if (cnt % 2)
- rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
- PPBUF_BASE2 + i, 0xFF, 0xFF);
-
- rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_TPC, 0xFF, tpc);
- rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_BYTE_CNT, 0xFF, cnt);
- rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_TRANS_CFG, 0xFF, cfg);
- rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_DATA_SOURCE,
- 0x01, PINGPONG_BUFFER);
-
- rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_TRANSFER,
- 0xFF, MS_TRANSFER_START | MS_TM_WRITE_BYTES);
- rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, MS_TRANSFER,
- MS_TRANSFER_END, MS_TRANSFER_END);
- if (int_reg)
- rtsx_pci_add_cmd(pcr, READ_REG_CMD, MS_TRANS_CFG, 0, 0);
-
- err = rtsx_pci_send_cmd(pcr, 5000);
- if (err < 0) {
- u8 val;
-
- rtsx_pci_read_register(pcr, MS_TRANS_CFG, &val);
- dev_dbg(ms_dev(host), "MS_TRANS_CFG: 0x%02x\n", val);
-
- if (int_reg)
- *int_reg = val & 0x0F;
-
- ms_print_debug_regs(host);
-
- ms_clear_error(host);
-
- if (!(tpc & 0x08)) {
- if (val & MS_CRC16_ERR)
- return -EIO;
- } else {
- if (!(val & 0x80)) {
- if (val & (MS_INT_ERR | MS_INT_CMDNK))
- return -EIO;
- }
- }
-
- return -ETIMEDOUT;
- }
-
- if (int_reg) {
- u8 *ptr = rtsx_pci_get_cmd_data(pcr) + 1;
- *int_reg = *ptr & 0x0F;
- }
-
- return 0;
-}
-
-static int ms_read_bytes(struct realtek_pci_ms *host, u8 tpc,
- u8 cfg, u8 cnt, u8 *data, u8 *int_reg)
-{
- struct rtsx_pcr *pcr = host->pcr;
- int err, i;
- u8 *ptr;
-
- dev_dbg(ms_dev(host), "%s: tpc = 0x%02x\n", __func__, tpc);
-
- if (!data)
- return -EINVAL;
-
- rtsx_pci_init_cmd(pcr);
-
- rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_TPC, 0xFF, tpc);
- rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_BYTE_CNT, 0xFF, cnt);
- rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_TRANS_CFG, 0xFF, cfg);
- rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_DATA_SOURCE,
- 0x01, PINGPONG_BUFFER);
-
- rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_TRANSFER,
- 0xFF, MS_TRANSFER_START | MS_TM_READ_BYTES);
- rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, MS_TRANSFER,
- MS_TRANSFER_END, MS_TRANSFER_END);
- for (i = 0; i < cnt - 1; i++)
- rtsx_pci_add_cmd(pcr, READ_REG_CMD, PPBUF_BASE2 + i, 0, 0);
- if (cnt % 2)
- rtsx_pci_add_cmd(pcr, READ_REG_CMD, PPBUF_BASE2 + cnt, 0, 0);
- else
- rtsx_pci_add_cmd(pcr, READ_REG_CMD,
- PPBUF_BASE2 + cnt - 1, 0, 0);
- if (int_reg)
- rtsx_pci_add_cmd(pcr, READ_REG_CMD, MS_TRANS_CFG, 0, 0);
-
- err = rtsx_pci_send_cmd(pcr, 5000);
- if (err < 0) {
- u8 val;
-
- rtsx_pci_read_register(pcr, MS_TRANS_CFG, &val);
- dev_dbg(ms_dev(host), "MS_TRANS_CFG: 0x%02x\n", val);
-
- if (int_reg)
- *int_reg = val & 0x0F;
-
- ms_print_debug_regs(host);
-
- ms_clear_error(host);
-
- if (!(tpc & 0x08)) {
- if (val & MS_CRC16_ERR)
- return -EIO;
- } else {
- if (!(val & 0x80)) {
- if (val & (MS_INT_ERR | MS_INT_CMDNK))
- return -EIO;
- }
- }
-
- return -ETIMEDOUT;
- }
-
- ptr = rtsx_pci_get_cmd_data(pcr) + 1;
- for (i = 0; i < cnt; i++)
- data[i] = *ptr++;
-
- if (int_reg)
- *int_reg = *ptr & 0x0F;
-
- return 0;
-}
-
-static int rtsx_pci_ms_issue_cmd(struct realtek_pci_ms *host)
-{
- struct memstick_request *req = host->req;
- int err = 0;
- u8 cfg = 0, int_reg;
-
- dev_dbg(ms_dev(host), "%s\n", __func__);
-
- if (req->need_card_int) {
- if (host->ifmode != MEMSTICK_SERIAL)
- cfg = WAIT_INT;
- }
-
- if (req->long_data) {
- err = ms_transfer_data(host, req->data_dir,
- req->tpc, cfg, &(req->sg));
- } else {
- if (req->data_dir == READ) {
- err = ms_read_bytes(host, req->tpc, cfg,
- req->data_len, req->data, &int_reg);
- } else {
- err = ms_write_bytes(host, req->tpc, cfg,
- req->data_len, req->data, &int_reg);
- }
- }
- if (err < 0)
- return err;
-
- if (req->need_card_int && (host->ifmode == MEMSTICK_SERIAL)) {
- err = ms_read_bytes(host, MS_TPC_GET_INT,
- NO_WAIT_INT, 1, &int_reg, NULL);
- if (err < 0)
- return err;
- }
-
- if (req->need_card_int) {
- dev_dbg(ms_dev(host), "int_reg: 0x%02x\n", int_reg);
-
- if (int_reg & MS_INT_CMDNK)
- req->int_reg |= MEMSTICK_INT_CMDNAK;
- if (int_reg & MS_INT_BREQ)
- req->int_reg |= MEMSTICK_INT_BREQ;
- if (int_reg & MS_INT_ERR)
- req->int_reg |= MEMSTICK_INT_ERR;
- if (int_reg & MS_INT_CED)
- req->int_reg |= MEMSTICK_INT_CED;
- }
-
- return 0;
-}
-
-static void rtsx_pci_ms_handle_req(struct work_struct *work)
-{
- struct realtek_pci_ms *host = container_of(work,
- struct realtek_pci_ms, handle_req);
- struct rtsx_pcr *pcr = host->pcr;
- struct memstick_host *msh = host->msh;
- int rc;
-
- mutex_lock(&pcr->pcr_mutex);
-
- rtsx_pci_start_run(pcr);
-
- rtsx_pci_switch_clock(host->pcr, host->clock, host->ssc_depth,
- false, true, false);
- rtsx_pci_write_register(pcr, CARD_SELECT, 0x07, MS_MOD_SEL);
- rtsx_pci_write_register(pcr, CARD_SHARE_MODE,
- CARD_SHARE_MASK, CARD_SHARE_48_MS);
-
- if (!host->req) {
- do {
- rc = memstick_next_req(msh, &host->req);
- dev_dbg(ms_dev(host), "next req %d\n", rc);
-
- if (!rc)
- host->req->error = rtsx_pci_ms_issue_cmd(host);
- } while (!rc);
- }
-
- mutex_unlock(&pcr->pcr_mutex);
-}
-
-static void rtsx_pci_ms_request(struct memstick_host *msh)
-{
- struct realtek_pci_ms *host = memstick_priv(msh);
-
- dev_dbg(ms_dev(host), "--> %s\n", __func__);
-
- if (rtsx_pci_card_exclusive_check(host->pcr, RTSX_MS_CARD))
- return;
-
- schedule_work(&host->handle_req);
-}
-
-static int rtsx_pci_ms_set_param(struct memstick_host *msh,
- enum memstick_param param, int value)
-{
- struct realtek_pci_ms *host = memstick_priv(msh);
- struct rtsx_pcr *pcr = host->pcr;
- unsigned int clock = 0;
- u8 ssc_depth = 0;
- int err;
-
- dev_dbg(ms_dev(host), "%s: param = %d, value = %d\n",
- __func__, param, value);
-
- err = rtsx_pci_card_exclusive_check(host->pcr, RTSX_MS_CARD);
- if (err)
- return err;
-
- switch (param) {
- case MEMSTICK_POWER:
- if (value == MEMSTICK_POWER_ON)
- err = ms_power_on(host);
- else if (value == MEMSTICK_POWER_OFF)
- err = ms_power_off(host);
- else
- return -EINVAL;
- break;
-
- case MEMSTICK_INTERFACE:
- if (value == MEMSTICK_SERIAL) {
- clock = 19000000;
- ssc_depth = RTSX_SSC_DEPTH_500K;
-
- err = rtsx_pci_write_register(pcr, MS_CFG, 0x58,
- MS_BUS_WIDTH_1 | PUSH_TIME_DEFAULT);
- if (err < 0)
- return err;
- } else if (value == MEMSTICK_PAR4) {
- clock = 39000000;
- ssc_depth = RTSX_SSC_DEPTH_1M;
-
- err = rtsx_pci_write_register(pcr, MS_CFG,
- 0x58, MS_BUS_WIDTH_4 | PUSH_TIME_ODD);
- if (err < 0)
- return err;
- } else {
- return -EINVAL;
- }
-
- err = rtsx_pci_switch_clock(pcr, clock,
- ssc_depth, false, true, false);
- if (err < 0)
- return err;
-
- host->ssc_depth = ssc_depth;
- host->clock = clock;
- host->ifmode = value;
- break;
- }
-
- return 0;
-}
-
-#ifdef CONFIG_PM
-
-static int rtsx_pci_ms_suspend(struct platform_device *pdev, pm_message_t state)
-{
- struct realtek_pci_ms *host = platform_get_drvdata(pdev);
- struct memstick_host *msh = host->msh;
-
- dev_dbg(ms_dev(host), "--> %s\n", __func__);
-
- memstick_suspend_host(msh);
- return 0;
-}
-
-static int rtsx_pci_ms_resume(struct platform_device *pdev)
-{
- struct realtek_pci_ms *host = platform_get_drvdata(pdev);
- struct memstick_host *msh = host->msh;
-
- dev_dbg(ms_dev(host), "--> %s\n", __func__);
-
- memstick_resume_host(msh);
- return 0;
-}
-
-#else /* CONFIG_PM */
-
-#define rtsx_pci_ms_suspend NULL
-#define rtsx_pci_ms_resume NULL
-
-#endif /* CONFIG_PM */
-
-static void rtsx_pci_ms_card_event(struct platform_device *pdev)
-{
- struct realtek_pci_ms *host = platform_get_drvdata(pdev);
-
- memstick_detect_change(host->msh);
-}
-
-static int rtsx_pci_ms_drv_probe(struct platform_device *pdev)
-{
- struct memstick_host *msh;
- struct realtek_pci_ms *host;
- struct rtsx_pcr *pcr;
- struct pcr_handle *handle = pdev->dev.platform_data;
- int rc;
-
- if (!handle)
- return -ENXIO;
-
- pcr = handle->pcr;
- if (!pcr)
- return -ENXIO;
-
- dev_dbg(&(pdev->dev),
- ": Realtek PCI-E Memstick controller found\n");
-
- msh = memstick_alloc_host(sizeof(*host), &pdev->dev);
- if (!msh)
- return -ENOMEM;
-
- host = memstick_priv(msh);
- host->pcr = pcr;
- host->msh = msh;
- host->pdev = pdev;
- platform_set_drvdata(pdev, host);
- pcr->slots[RTSX_MS_CARD].p_dev = pdev;
- pcr->slots[RTSX_MS_CARD].card_event = rtsx_pci_ms_card_event;
-
- mutex_init(&host->host_mutex);
-
- INIT_WORK(&host->handle_req, rtsx_pci_ms_handle_req);
- msh->request = rtsx_pci_ms_request;
- msh->set_param = rtsx_pci_ms_set_param;
- msh->caps = MEMSTICK_CAP_PAR4;
-
- rc = memstick_add_host(msh);
- if (rc) {
- memstick_free_host(msh);
- return rc;
- }
-
- return 0;
-}
-
-static void rtsx_pci_ms_drv_remove(struct platform_device *pdev)
-{
- struct realtek_pci_ms *host = platform_get_drvdata(pdev);
- struct rtsx_pcr *pcr;
- struct memstick_host *msh;
- int rc;
-
- pcr = host->pcr;
- pcr->slots[RTSX_MS_CARD].p_dev = NULL;
- pcr->slots[RTSX_MS_CARD].card_event = NULL;
- msh = host->msh;
- host->eject = true;
- cancel_work_sync(&host->handle_req);
-
- mutex_lock(&host->host_mutex);
- if (host->req) {
- dev_dbg(&(pdev->dev),
- "%s: Controller removed during transfer\n",
- dev_name(&msh->dev));
-
- rtsx_pci_complete_unfinished_transfer(pcr);
-
- host->req->error = -ENOMEDIUM;
- do {
- rc = memstick_next_req(msh, &host->req);
- if (!rc)
- host->req->error = -ENOMEDIUM;
- } while (!rc);
- }
- mutex_unlock(&host->host_mutex);
-
- memstick_remove_host(msh);
- memstick_free_host(msh);
-
- dev_dbg(&(pdev->dev),
- ": Realtek PCI-E Memstick controller has been removed\n");
-}
-
-static struct platform_device_id rtsx_pci_ms_ids[] = {
- {
- .name = DRV_NAME_RTSX_PCI_MS,
- }, {
- /* sentinel */
- }
-};
-MODULE_DEVICE_TABLE(platform, rtsx_pci_ms_ids);
-
-static struct platform_driver rtsx_pci_ms_driver = {
- .probe = rtsx_pci_ms_drv_probe,
- .remove_new = rtsx_pci_ms_drv_remove,
- .id_table = rtsx_pci_ms_ids,
- .suspend = rtsx_pci_ms_suspend,
- .resume = rtsx_pci_ms_resume,
- .driver = {
- .name = DRV_NAME_RTSX_PCI_MS,
- },
-};
-module_platform_driver(rtsx_pci_ms_driver);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Wei WANG <wei_wang@realsil.com.cn>");
-MODULE_DESCRIPTION("Realtek PCI-E Memstick Card Host Driver");
projects / linux-2.6-microblaze.git / commitdiff