// SPDX-License-Identifier: GPL-2.0-or-later /* * drivers/mmc/host/via-sdmmc.c - VIA SD/MMC Card Reader driver * Copyright (c) 2008, VIA Technologies Inc. All Rights Reserved. */ #include <linux/pci.h> #include <linux/module.h> #include <linux/dma-mapping.h> #include <linux/highmem.h> #include <linux/delay.h> #include <linux/interrupt.h> #include <linux/mmc/host.h> #include <linux/workqueue.h> #define DRV_NAME … #define PCI_DEVICE_ID_VIA_9530 … #define VIA_CRDR_SDC_OFF … #define VIA_CRDR_DDMA_OFF … #define VIA_CRDR_PCICTRL_OFF … #define VIA_CRDR_MIN_CLOCK … #define VIA_CRDR_MAX_CLOCK … /* * PCI registers */ #define VIA_CRDR_PCI_WORK_MODE … #define VIA_CRDR_PCI_DBG_MODE … /* * SDC MMIO Registers */ #define VIA_CRDR_SDCTRL … #define VIA_CRDR_SDCTRL_START … #define VIA_CRDR_SDCTRL_WRITE … #define VIA_CRDR_SDCTRL_SINGLE_WR … #define VIA_CRDR_SDCTRL_SINGLE_RD … #define VIA_CRDR_SDCTRL_MULTI_WR … #define VIA_CRDR_SDCTRL_MULTI_RD … #define VIA_CRDR_SDCTRL_STOP … #define VIA_CRDR_SDCTRL_RSP_NONE … #define VIA_CRDR_SDCTRL_RSP_R1 … #define VIA_CRDR_SDCTRL_RSP_R2 … #define VIA_CRDR_SDCTRL_RSP_R3 … #define VIA_CRDR_SDCTRL_RSP_R1B … #define VIA_CRDR_SDCARG … #define VIA_CRDR_SDBUSMODE … #define VIA_CRDR_SDMODE_4BIT … #define VIA_CRDR_SDMODE_CLK_ON … #define VIA_CRDR_SDBLKLEN … /* * Bit 0 -Bit 10 : Block length. So, the maximum block length should be 2048. * Bit 11 - Bit 13 : Reserved. * GPIDET : Select GPI pin to detect card, GPI means CR_CD# in top design. * INTEN : Enable SD host interrupt. * Bit 16 - Bit 31 : Block count. So, the maximun block count should be 65536. */ #define VIA_CRDR_SDBLKLEN_GPIDET … #define VIA_CRDR_SDBLKLEN_INTEN … #define VIA_CRDR_MAX_BLOCK_COUNT … #define VIA_CRDR_MAX_BLOCK_LENGTH … #define VIA_CRDR_SDRESP0 … #define VIA_CRDR_SDRESP1 … #define VIA_CRDR_SDRESP2 … #define VIA_CRDR_SDRESP3 … #define VIA_CRDR_SDCURBLKCNT … #define VIA_CRDR_SDINTMASK … /* * MBDIE : Multiple Blocks transfer Done Interrupt Enable * BDDIE : Block Data transfer Done Interrupt Enable * CIRIE : Card Insertion or Removal Interrupt Enable * CRDIE : Command-Response transfer Done Interrupt Enable * CRTOIE : Command-Response response TimeOut Interrupt Enable * ASCRDIE : Auto Stop Command-Response transfer Done Interrupt Enable * DTIE : Data access Timeout Interrupt Enable * SCIE : reSponse CRC error Interrupt Enable * RCIE : Read data CRC error Interrupt Enable * WCIE : Write data CRC error Interrupt Enable */ #define VIA_CRDR_SDINTMASK_MBDIE … #define VIA_CRDR_SDINTMASK_BDDIE … #define VIA_CRDR_SDINTMASK_CIRIE … #define VIA_CRDR_SDINTMASK_CRDIE … #define VIA_CRDR_SDINTMASK_CRTOIE … #define VIA_CRDR_SDINTMASK_ASCRDIE … #define VIA_CRDR_SDINTMASK_DTIE … #define VIA_CRDR_SDINTMASK_SCIE … #define VIA_CRDR_SDINTMASK_RCIE … #define VIA_CRDR_SDINTMASK_WCIE … #define VIA_CRDR_SDACTIVE_INTMASK … #define VIA_CRDR_SDSTATUS … /* * CECC : Reserved * WP : SD card Write Protect status * SLOTD : Reserved * SLOTG : SD SLOT status(Gpi pin status) * MBD : Multiple Blocks transfer Done interrupt status * BDD : Block Data transfer Done interrupt status * CD : Reserved * CIR : Card Insertion or Removal interrupt detected on GPI pin * IO : Reserved * CRD : Command-Response transfer Done interrupt status * CRTO : Command-Response response TimeOut interrupt status * ASCRDIE : Auto Stop Command-Response transfer Done interrupt status * DT : Data access Timeout interrupt status * SC : reSponse CRC error interrupt status * RC : Read data CRC error interrupt status * WC : Write data CRC error interrupt status */ #define VIA_CRDR_SDSTS_CECC … #define VIA_CRDR_SDSTS_WP … #define VIA_CRDR_SDSTS_SLOTD … #define VIA_CRDR_SDSTS_SLOTG … #define VIA_CRDR_SDSTS_MBD … #define VIA_CRDR_SDSTS_BDD … #define VIA_CRDR_SDSTS_CD … #define VIA_CRDR_SDSTS_CIR … #define VIA_CRDR_SDSTS_IO … #define VIA_CRDR_SDSTS_CRD … #define VIA_CRDR_SDSTS_CRTO … #define VIA_CRDR_SDSTS_ASCRDIE … #define VIA_CRDR_SDSTS_DT … #define VIA_CRDR_SDSTS_SC … #define VIA_CRDR_SDSTS_RC … #define VIA_CRDR_SDSTS_WC … #define VIA_CRDR_SDSTS_IGN_MASK … #define VIA_CRDR_SDSTS_INT_MASK … #define VIA_CRDR_SDSTS_W1C_MASK … #define VIA_CRDR_SDSTS_CMD_MASK … #define VIA_CRDR_SDSTS_DATA_MASK … #define VIA_CRDR_SDSTATUS2 … /* * CFE : Enable SD host automatic Clock FReezing */ #define VIA_CRDR_SDSTS_CFE … #define VIA_CRDR_SDRSPTMO … #define VIA_CRDR_SDCLKSEL … #define VIA_CRDR_SDEXTCTRL … #define VIS_CRDR_SDEXTCTRL_AUTOSTOP_SD … #define VIS_CRDR_SDEXTCTRL_SHIFT_9 … #define VIS_CRDR_SDEXTCTRL_MMC_8BIT … #define VIS_CRDR_SDEXTCTRL_RELD_BLK … #define VIS_CRDR_SDEXTCTRL_BAD_CMDA … #define VIS_CRDR_SDEXTCTRL_BAD_DATA … #define VIS_CRDR_SDEXTCTRL_AUTOSTOP_SPI … #define VIA_CRDR_SDEXTCTRL_HISPD … /* 0x38-0xFF reserved */ /* * Data DMA Control Registers */ #define VIA_CRDR_DMABASEADD … #define VIA_CRDR_DMACOUNTER … #define VIA_CRDR_DMACTRL … /* * DIR :Transaction Direction * 0 : From card to memory * 1 : From memory to card */ #define VIA_CRDR_DMACTRL_DIR … #define VIA_CRDR_DMACTRL_ENIRQ … #define VIA_CRDR_DMACTRL_SFTRST … #define VIA_CRDR_DMASTS … #define VIA_CRDR_DMASTART … /*0x14-0xFF reserved*/ /* * PCI Control Registers */ /*0x0 - 0x1 reserved*/ #define VIA_CRDR_PCICLKGATT … /* * SFTRST : * 0 : Soft reset all the controller and it will be de-asserted automatically * 1 : Soft reset is de-asserted */ #define VIA_CRDR_PCICLKGATT_SFTRST … /* * 3V3 : Pad power select * 0 : 1.8V * 1 : 3.3V * NOTE : No mater what the actual value should be, this bit always * read as 0. This is a hardware bug. */ #define VIA_CRDR_PCICLKGATT_3V3 … /* * PAD_PWRON : Pad Power on/off select * 0 : Power off * 1 : Power on * NOTE : No mater what the actual value should be, this bit always * read as 0. This is a hardware bug. */ #define VIA_CRDR_PCICLKGATT_PAD_PWRON … #define VIA_CRDR_PCISDCCLK … #define VIA_CRDR_PCIDMACLK … #define VIA_CRDR_PCIDMACLK_SDC … #define VIA_CRDR_PCIINTCTRL … #define VIA_CRDR_PCIINTCTRL_SDCIRQEN … #define VIA_CRDR_PCIINTSTATUS … #define VIA_CRDR_PCIINTSTATUS_SDC … #define VIA_CRDR_PCITMOCTRL … #define VIA_CRDR_PCITMOCTRL_NO … #define VIA_CRDR_PCITMOCTRL_32US … #define VIA_CRDR_PCITMOCTRL_256US … #define VIA_CRDR_PCITMOCTRL_1024US … #define VIA_CRDR_PCITMOCTRL_256MS … #define VIA_CRDR_PCITMOCTRL_512MS … #define VIA_CRDR_PCITMOCTRL_1024MS … /*0xB-0xFF reserved*/ enum PCI_HOST_CLK_CONTROL { … }; struct sdhcreg { … }; struct pcictrlreg { … }; struct via_crdr_mmc_host { … }; /* some devices need a very long delay for power to stabilize */ #define VIA_CRDR_QUIRK_300MS_PWRDELAY … #define VIA_CMD_TIMEOUT_MS … static const struct pci_device_id via_ids[] = …; MODULE_DEVICE_TABLE(pci, via_ids); static void via_print_sdchc(struct via_crdr_mmc_host *host) { … } static void via_print_pcictrl(struct via_crdr_mmc_host *host) { … } static void via_save_pcictrlreg(struct via_crdr_mmc_host *host) { … } static void via_restore_pcictrlreg(struct via_crdr_mmc_host *host) { … } static void via_save_sdcreg(struct via_crdr_mmc_host *host) { … } static void via_restore_sdcreg(struct via_crdr_mmc_host *host) { … } static void via_pwron_sleep(struct via_crdr_mmc_host *sdhost) { … } static void via_set_ddma(struct via_crdr_mmc_host *host, dma_addr_t dmaaddr, u32 count, int dir, int enirq) { … } static void via_sdc_preparedata(struct via_crdr_mmc_host *host, struct mmc_data *data) { … } static void via_sdc_get_response(struct via_crdr_mmc_host *host, struct mmc_command *cmd) { … } static void via_sdc_send_command(struct via_crdr_mmc_host *host, struct mmc_command *cmd) { … } static void via_sdc_finish_data(struct via_crdr_mmc_host *host) { … } static void via_sdc_finish_command(struct via_crdr_mmc_host *host) { … } static void via_sdc_request(struct mmc_host *mmc, struct mmc_request *mrq) { … } static void via_sdc_set_power(struct via_crdr_mmc_host *host, unsigned short power, unsigned int on) { … } static void via_sdc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) { … } static int via_sdc_get_ro(struct mmc_host *mmc) { … } static const struct mmc_host_ops via_sdc_ops = …; static void via_reset_pcictrl(struct via_crdr_mmc_host *host) { … } static void via_sdc_cmd_isr(struct via_crdr_mmc_host *host, u16 intmask) { … } static void via_sdc_data_isr(struct via_crdr_mmc_host *host, u16 intmask) { … } static irqreturn_t via_sdc_isr(int irq, void *dev_id) { … } static void via_sdc_timeout(struct timer_list *t) { … } static void via_sdc_finish_bh_work(struct work_struct *t) { … } static void via_sdc_card_detect(struct work_struct *work) { … } static void via_init_mmc_host(struct via_crdr_mmc_host *host) { … } static int via_sd_probe(struct pci_dev *pcidev, const struct pci_device_id *id) { … } static void via_sd_remove(struct pci_dev *pcidev) { … } static void __maybe_unused via_init_sdc_pm(struct via_crdr_mmc_host *host) { … } static int __maybe_unused via_sd_suspend(struct device *dev) { … } static int __maybe_unused via_sd_resume(struct device *dev) { … } static SIMPLE_DEV_PM_OPS(via_sd_pm_ops, via_sd_suspend, via_sd_resume); static struct pci_driver via_sd_driver = …; module_pci_driver(…) …; MODULE_LICENSE(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …;
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