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